pi db - Page 62 - Developer IT

Calculating volume for sphere in c++

- by Crystal

This is probably an easy one, but is the right way to calculate volume for a sphere in c++. My getArea() seems to be right, but when I call getVolume() it doesn't output the right amount. With a sphere of radius = 1, it gives me the answer of pi, which is incorrect: double Sphere::getArea() const { return 4 * Shape::pi * pow(getZ(), 2); } double Sphere::getVolume() const { return (4 / 3) * Shape::pi * pow(getZ(), 3); }

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DB Design Pattern - Many to many classification / categorised tagging.

- by Robin Day

I have an existing database design that stores Job Vacancies. The "Vacancy" table has a number of fixed fields across all clients, such as "Title", "Description", "Salary range". There is an EAV design for "Custom" fields that the Clients can setup themselves, such as, "Manager Name", "Working Hours". The field names are stored in a "ClientText" table and the data stored in a "VacancyClientText" table with VacancyId, ClientTextId and Value. Lastly there is a many to many EAV design for custom tagging / categorising the vacancies with things such as Locations/Offices the vacancy is in, a list of skills required. This is stored as a "ClientCategory" table listing the types of tag, "Locations, Skills", a "ClientCategoryItem" table listing the valid values for each Category, e.g., "London,Paris,New York,Rome", "C#,VB,PHP,Python". Finally there is a "VacancyClientCategoryItem" table with VacancyId and ClientCategoryItemId for each of the selected items for the vacancy. There are no limits to the number of custom fields or custom categories that the client can add. I am now designing a new system that is very similar to the existing system, however, I have the ability to restrict the number of custom fields a Client can have and it's being built from scratch so I have no legacy issues to deal with. For the Custom Fields my solution is simple, I have 5 additional columns on the Vacancy Table called CustomField1-5. This removes one of the EAV designs. It is with the tagging / categorising design that I am struggling. If I limit a client to having 5 categories / types of tag. Should I create 5 tables listing the possible values "CustomCategoryItems1-5" and then an additional 5 many to many tables "VacancyCustomCategoryItem1-5" This would result in 10 tables performing the same storage as the three tables in the existing system. Also, should (heaven forbid) the requirements change in that I need 6 custom categories rather than 5 then this will result in a lot of code change. Therefore, can anyone suggest any DB Design Patterns that would be more suitable to storing such data. I'm happy to stick with the EAV approach, however, the existing system has come across all the usual performance issues and complex queries associated with such a design. Any advice / suggestions are much appreciated. The DBMS system used is SQL Server 2005, however, 2008 is an option if required for any particular pattern.

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matlab constant anonymous function returns only one value instead of an array

- by Filo

I've been searching the net for a couple of mornings and found nothing, hope you can help. I have an anonymous function like this f = @(x,y) [sin(2*pi*x).*cos(2*pi*y), cos(2*pi*x).*sin(2*pi*y)]; that needs to be evaluated on an array of points, something like x = 0:0.1:1; y = 0:0.1:1; w = f(x',y'); Now, in the above example everything works fine, the result w is a 11x2 matrix with in each row the correct value f(x(i), y(i)). The problem comes when I change my function to have constant values: f = @(x,y) [0, 1]; Now, even with array inputs like before, I only get out a 1x2 array like w = [0,1]; while of course I want to have the same structure as before, i.e. a 11x2 matrix. I have no idea why Matlab is doing this...

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static const double in c++

- by Crystal

Is this the proper way to use a static const variable? In my top level class (Shape) #ifndef SHAPE_H #define SHAPE_H class Shape { public: static const double pi; private: double originX; double originY; }; const double Shape::pi = 3.14159265; #endif And then later in a class that extends Shape, I use Shape::pi. I get a linker error. I moved the const double Shape::pi = 3.14... to the Shape.cpp file and my program then compiles. Why does that happen? thanks.

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[EF + Oracle] Inserting Data (1/2)

- by JTorrecilla

Prologue Following EF series (I ,II y III) in this chapter we will see how to create DB record from EF. Inserting Data Like we indicated in the 2º post: “One Entity matches with a DB record, and one property match with a Table Column”. To start, we need to create an object from one of the Entities: 1: EMPLEADOS empleado = new EMPLEADOS(); Also like, I told previously, Exists the possibility to use the Static Function defined by VS for each Entity: Once we have created the object, we can Access to it properties to fill like a common class: 1: empleado.NOMBRE = "Javier Torrecilla"; After finish of fill our Entity properties, it must be needed to add the object to the appropriate ObjectSet in the ObjectContext: 1: enti.EMPLEADOS.AddObject(empleado); or 1: enti.AddToEMPLEADOS(empleado); Both methods will do the same action, create an insert statement. Have we finished? No. Any Entity has a property called “EntityState”. This prop is an Enum from “EntityState”, which has the following: Detached: the Entity is created, but not added to the Context. Unchanged: There is no pending changes in the Entity. Added: The entity is added to the ObjectSet, but it is not yet sent to the DB. Deleted: The object is deleted form the ObjectSet, but not yet from the DB. Modified: There is Pending Changes to confirm. Let’s see, the several values of the property during the Creation steps: 1. While the Object is created and we are filling the props: EntityState.Detached; 2. After adding to the ObjectSet: EntityState.Added. This not indicated that the record is in the DB 3. Saving the Data: To sabe the data in the DB, we are going to call “SaveChanges” method of the Object Context. After invoke it, the property will be EntityState.Unchanged. What does SaveChanges Method? This function will synchronize and send all pending changes to DB. It will add, modify or delete all Entities, whose EntityState property, is setted to Added, Deleted or Modified. After finishing, all added or modified entities will be change the State to “Unchanged”, and deleted Entities must take the “Detached” state.

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Appengine Model SelfReferenceProperty and parent child relationship

- by GeekTantra

I have a scenario in which I need a self reference property as follow: class Post(db.Model): creator = db.UserProperty() post_title = db.StringProperty(required=True) post_status = db.StringProperty(required=True, choices=['draft', 'published']) post_parent = db.SelfReferenceProperty() Now, I want ensure that an entity shouldn't be its own parent and a child of an entity cannot be its parent. How can I ensure this kind of a relationship in the PostForm model form and the Post model.

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Cannot change font size /type in plots

- by Sameet Nabar

I recently had to re-install my operating system (Ubuntu). The only thing I did differently is that I installed Matlab on a separate partition, not the main Ubuntu partition. After re-installing, the fonts in my plots are no longer configurable. For example, if I ask the title font to be bold, it doesn't happen. I ran the sample code below on my computer and then on my colleague's computer and the 2 results are attached. This cannot be a problem with the code; rather in the settings of Matlab. Could somebody please tell me what settings I need to change? Thanks in advance for your help. Regards, Sameet. x1=-pi:.1:pi; x2=-pi:pi/10:pi; y1=sin(x1); y2=tan(sin(x2)) - sin(tan(x2)); [AX,H1,H2]=plotyy(x1,y1,x2,y2); xlabel ('Time (hh:mm)'); ylabel (AX(1), 'Plot1'); ylabel (AX(2), 'Plot2'); axes(AX(2)) set(H1,'linestyle','none','marker','.'); set(H2,'linestyle','none','marker','.'); title('Plot Title','FontWeight','bold'); set(gcf, 'Visible', 'off'); [legh, objh] = legend([H1 H2],'Plot1', 'Plot2','location','Best'); set(legend,'FontSize',8); print -dpng Trial.png; Bad image: http://imageshack.us/photo/my-images/708/trial1u.png/ Good image: http://imageshack.us/photo/my-images/87/trial2.png/

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Why the valid looking statement gives error in MATLAB?

- by user198729

It's from this question? Why the two solutions doesn't work, though it looks very valid for me: >> t = -pi:0.1:pi; >> r = ((sin(t)*sqrt(cos(t)))*(sin(t) + (7/5))^(-1)) - 2*sin(t) + 2 ; ??? Error using ==> mtimes Inner matrix dimensions must agree. >> t = -pi:0.1:pi; >> r = ((sin(t).*sqrt(cos(t))).*(sin(t) + (7/5)).^(-1)) - 2*sin(t) + 2 ; >> plot(r,t) ??? Error using ==> plot Vectors must be the same lengths. What's wrong with the above?

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Surface Area of a Spheroid in Python

- by user3678321

I'm trying to write a function that calculates the surface area of a prolate or oblate spheroid. Here's a link to where I got the formulas (http://en.wikipedia.org/wiki/Prolate_spheroid & http://en.wikipedia.org/wiki/Oblate_spheroid). I think I've written them wrong, but here is my code so far; from math import pi, sqrt, asin, degrees, tanh def checkio(height, width): height = float(height) width = float(width) lst = [] if height == width: r = 0.5 * width surface_area = 4 * pi * r**2 surface_area = round(surface_area, 2) lst.append(surface_area) elif height > width: #If spheroid is prolate a = 0.5 * width b = 0.5 * height e = 1 - a / b surface_area = 2 * pi * a**2 * (1 + b / a * e * degrees(asin**-1(e))) surface_area = round(surface_area, 2) lst.append(surface_area) elif height < width: #If spheroid is oblate a = 0.5 * height b = 0.5 * width e = 1 - b / a surface_area = 2 * pi * a**2 * (1 + 1 - e**2 / e * tanh**-1(e)) surface_area = round(surface_area, 2) lst.append(surface_area, 2) return lst

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attempt to write a readonly database in Android2.1

- by JoJo

This is the error: android.database.sqlite.SQLiteException: attempt to write a readonly database This is my code: SQLiteDatabase db = mDatabase.getWritableDatabase(); db.beginTransaction(); try { // add new records ContentValues newRecord = new ContentValues(); newRecord.put(Emergencydetails.EMERGENCYNUMBER, emergencyNumber.getText().toString()); db.insert(Emergencydetails.EMERGENCY_TABLE_NAME, null, newRecord); db.setTransactionSuccessful(); } finally { db.endTransaction(); }

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how to get all 'username' from my model 'MyUser' on google-app-engine ..

- by zjm1126

my model is : class MyUser(db.Model): user = db.UserProperty() password = db.StringProperty(default=UNUSABLE_PASSWORD) email = db.StringProperty() nickname = db.StringProperty(indexed=False) and my method which want to get all username is : s=[] a=MyUser.all().fetch(10000) for i in a: s.append(i.username) and the error is : AttributeError: 'MyUser' object has no attribute 'username' so how can i get all 'username', which is the simplest way . thanks

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'area' not declared in this scope

- by user1641173

I've just started learning c++ and am trying to write a program for finding the area of a circle. I've written the program and whenever I try to compile it I get 2 error messages. The first is: areaofcircle.cpp:9:14: error: expected unqualified-id before numeric constant and the second is: areaofcircle.cpp:18:5: error: 'area' was not declared in this scope What should I do? I would post a picture, but I'm a new user, so I can't. #include <iostream> using namespace std; #define pi 3.1415926535897932384626433832795 int main() { // Create three float variable values: r, pi, area float r, pi, area; cout << "This program computes the area of a circle." << endl; // Prompt user to enter the radius of the circle, read input value into variable r cout << "Enter the radius of the circle " << endl; cin >> r; // Square r and then multiply by pi area = r * r * pi; cout << "The area is " << area << "." << endl; }

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500 - An error has occurred! DB function reports no errors when adding new article in Joomla!

- by Roland

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How do I create a Linked Server in SQL Server 2005 to a password protected Access 95 database?

- by Brad Knowles

I need to create a linked server with SQL Server Management Studio 2005 to an Access 95 database, which happens to be password protected at the database level. User level security has not been implemented. I cannot convert the Access database to a newer version. It is being used by a 3rd party application; so modifying it, in any way, is not allowed. I've tried using the Jet 4.0 OLE DB Provider and the ODBC OLE DB Provider. The 3rd party application creates a System DSN (with the proper database password), but I've not had any luck in using either method. If I were using a standard connection string, I think it would look something like this: Provider=Microsoft.Jet.OLEDB.4.0;Data Source='C:\Test.mdb';Jet OLEDB:Database Password=####; I'm fairly certain I need to somehow incorporate Jet OLEDB:Database Password into the linked server setup, but haven't figured out how. I've posted the scripts I'm using along with the associated error messages below. Any help is greatly appreciated. I'll provide more details if needed, just ask. Thanks! Method #1 - Using the Jet 4.0 Provider When I try to run these statements to create the linked server: sp_dropserver 'Test', 'droplogins'; EXEC sp_addlinkedserver @server = N'Test', @provider = N'Microsoft.Jet.OLEDB.4.0', @srvproduct = N'Access DB', @datasrc = N'C:\Test.mdb' GO EXEC sp_addlinkedsrvlogin @rmtsrvname=N'Test', @useself=N'False',@locallogin=NULL, @rmtuser=N'Admin', @rmtpassword='####' GO I get this error when testing the connection: TITLE: Microsoft SQL Server Management Studio ------------------------------ "The test connection to the linked server failed." ------------------------------ ADDITIONAL INFORMATION: An exception occurred while executing a Transact-SQL statement or batch. (Microsoft.SqlServer.ConnectionInfo) ------------------------------ The OLE DB provider "Microsoft.Jet.OLEDB.4.0" for linked server "Test" reported an error. Authentication failed. Cannot initialize the data source object of OLE DB provider "Microsoft.Jet.OLEDB.4.0" for linked server "Test". OLE DB provider "Microsoft.Jet.OLEDB.4.0" for linked server "Test" returned message "Cannot start your application. The workgroup information file is missing or opened exclusively by another user.". (Microsoft SQL Server, Error: 7399) ------------------------------ Method #2 - Using the ODBC Provider... sp_dropserver 'Test', 'droplogins'; EXEC sp_addlinkedserver @server = N'Test', @provider = N'MSDASQL', @srvproduct = N'ODBC', @datasrc = N'Test:DSN' GO EXEC sp_addlinkedsrvlogin @rmtsrvname=N'Test', @useself=N'False',@locallogin=NULL, @rmtuser=N'Admin', @rmtpassword='####' GO I get this error: TITLE: Microsoft SQL Server Management Studio ------------------------------ "The test connection to the linked server failed." ------------------------------ ADDITIONAL INFORMATION: An exception occurred while executing a Transact-SQL statement or batch. (Microsoft.SqlServer.ConnectionInfo) ------------------------------ Cannot initialize the data source object of OLE DB provider "MSDASQL" for linked server "Test". OLE DB provider "MSDASQL" for linked server "Test" returned message "[Microsoft][ODBC Driver Manager] Driver's SQLSetConnectAttr failed". OLE DB provider "MSDASQL" for linked server "Test" returned message "[Microsoft][ODBC Driver Manager] Driver's SQLSetConnectAttr failed". OLE DB provider "MSDASQL" for linked server "Test" returned message "[Microsoft][ODBC Microsoft Access Driver] Cannot open database '(unknown)'. It may not be a database that your application recognizes, or the file may be corrupt.". (Microsoft SQL Server, Error: 7303)

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Dynamic Class Inheritance For PHP

- by VirtuosiMedia

I have a situation where I think I might need dynamic class inheritance in PHP 5.3, but the idea doesn't sit well and I'm looking for a different design pattern to solve my problem if it's possible. Use Case I have a set of DB abstraction layer classes that dynamically compiles SQL queries, with one DAL class for each DB type (MySQL, MsSQL, Oracle, etc.). Each table in the database has its own class that extends the appropriate DAL class. The idea is that you interact with the table classes, but never directly use the DAL class. If you want to support a different DB type for your app, you don't need to rewrite any queries or even any code, you simply change a setting that swaps one DAL class out for another...and that's it. To give you a better idea of how this is used, you can take a look at the DAL class, the table classes, and how they are used on this StackExchange Code Review page. To really understand what I'm trying to do, please take a look at my implementation first before suggesting a solution. Issues The strategy that I had used previously was to have all of the DAL classes share the same class name. This eliminated autoloading, so I had to manually load the appropriate DAL class in a switch statement. However, this approach presents some problems for testing and documentation purposes, so I'd like to find a different way to solve the problem of loading the correct DAL class more elegantly. Update to clarify the issue The problem basically boils down to inconsistencies in the class name (pre-PHP 5.3) or class namespace (PHP 5.3) and its location in the directory structure. At this point, all of my DAL classes have the same name, DBObject, but reside in different folders, MySQL, Oracle, etc. My table classes all extend DBObject, but which DBObject they extend varies depending on which one has been loaded. Basically, I'm trying to have my cake and eat it too. The table classes act as a stable API and extend a dynamic backend, the DAL (DBObject) classes. It works great, but I outsmarted myself and because of the inconsistencies with the class names and their locations, I can't autoload the DBObject, which makes running unit tests and generating API docs impossible for the DBObject classes because the tests and docs rely on auto-loading. Just loading the appropriate DBObject into memory using a factory method won't work because there will be times when I need to load multiple DBObjects for testing. Because the classes currently share a name, this causes a class is already defined error. I can make exceptions for the DBObjects in my test code, obviously, but I'm looking for something a little less hacky as there may future instances where something similar would need to be done. Solutions? Worst case scenario, I can continue my current strategy, but I don't like it very much, especially as I'll soon be converting my code to PHP 5.3. I suspect that I can use some sort of dynamic inheritance via either namespaces (preferred) or a dynamic class extension, but I haven't been able to find good examples of this implemented in the wild. In your answers, please suggest either an alternate pattern that would work for this use case or an example of dynamic inheritance done right. Please assume PHP 5.3 with namespaced code. Any code examples are greatly encouraged. The preferred constraints for the solution are: DAL class can be autoloaded. DAL classes don't share the same exact same namespace, but share the same class name. As an example, I would prefer to use classes named DbObject that use namespaces like Vm\Db\MySql and Vm\Db\Oracle. Table classes don't have to be rewritten with a change in DB type. The appropriate DB type is determined via a single setting only. That setting is the only thing that should need to change to interchange DB types. Ideally, the setting check should occur only once per page load, but I'm flexible on that.

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rpm build from src file

- by danielrutledge

Hi all, I'm trying to build from a *.src.rpm file on FC 12 in such a way that the files are distributed a across my system as they would with a normal binary build (in this case, *.h files end up in /usr/include). When I ran rpmbuild, the headers weren't present. Here's my rpmbuild command: [root@localhost sphirewalld]# rpm -ivv /home/dan/Downloads/gtest-1.3.0-2.20090601svn257.fc12.src.rpm ============== /home/dan/Downloads/gtest-1.3.0-2.20090601svn257.fc12.src.rpm Expected size: 489395 = lead(96)+sigs(180)+pad(4)+data(489115) Actual size: 489395 loading keyring from pubkeys in /var/lib/rpm/pubkeys/*.key couldn't find any keys in /var/lib/rpm/pubkeys/*.key loading keyring from rpmdb opening db environment /var/lib/rpm/Packages cdb:mpool:joinenv opening db index /var/lib/rpm/Packages rdonly mode=0x0 locked db index /var/lib/rpm/Packages opening db index /var/lib/rpm/Name rdonly mode=0x0 read h# 931 Header sanity check: OK added key gpg-pubkey-57bbccba-4a6f97af to keyring read h# 1327 Header sanity check: OK added key gpg-pubkey-7fac5991-4615767f to keyring read h# 1420 Header sanity check: OK added key gpg-pubkey-16ca1a56-4a100959 to keyring read h# 1896 Header sanity check: OK added key gpg-pubkey-a3a882c1-4a1009ef to keyring Using legacy gpg-pubkey(s) from rpmdb /home/dan/Downloads/gtest-1.3.0-2.20090601svn257.fc12.src.rpm: Header SHA1 digest: OK (3e98ed9b1631395d417e00f35c83ebe588ea9d3b) added source package [0] found 1 source and 0 binary packages Expected size: 489395 = lead(96)+sigs(180)+pad(4)+data(489115) Actual size: 489395 InstallSourcePackage at: psm.c:232: Header SHA1 digest: OK (3e98ed9b1631395d417e00f35c83ebe588ea9d3b) gtest-1.3.0-2.20090601svn257.fc12 ========== Directories not explicitly included in package: 0 /root/rpmbuild/SOURCES/ 1 /root/rpmbuild/SPECS/ ========== warning: user mockbuild does not exist - using root warning: group mockbuild does not exist - using root fini 100664 1 ( 0, 0) 478034 /root/rpmbuild/SOURCES/gtest-1.3.0.tar.bz2;4ba93ce1 unknown warning: user mockbuild does not exist - using root warning: group mockbuild does not exist - using root fini 100644 1 ( 0, 0) 30505 /root/rpmbuild/SOURCES/gtest-svnr257.patch;4ba93ce1 unknown warning: user mockbuild does not exist - using root warning: group mockbuild does not exist - using root fini 100644 1 ( 0, 0) 2732 /root/rpmbuild/SPECS/gtest.spec;4ba93ce1 unknown GZDIO: 63 reads, 511788 total bytes in 0.005930 secs closed db index /var/lib/rpm/Name closed db index /var/lib/rpm/Packages closed db environment /var/lib/rpm/Packages Thanks for your help.

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Sun-JRE on CentOS-4.8 RPM error: post-install scriptlet failed, exit status 5

- by Emyr

I have a server with CentOS 4.8 installed. The provided is rubbish, but there's only a few months left, and they're busy being sued by Chase bank, so I doubt I can get CentOS 5. I wiped the server clean using Virtuozzo, and found that the default image is VERY empty. I even had to install yum myself. I've reached the point where I want to install TomCat. I downloaded the Sun JRE as a .rpm.bin file, did chmod a+x and ran it. That produced a .rpm file, which I tried installing: [root@host java]# rpm -Uvh jre-6u20-linux-i586.rpm Preparing... ########################################### [100%] 1:jre ########################################### [100%] Unpacking JAR files... rt.jar... jsse.jar... charsets.jar... localedata.jar... plugin.jar... javaws.jar... deploy.jar... error: %post(jre-1.6.0_20-fcs.i586) scriptlet failed, exit status 5 [root@host java]# rpm -evv jre-6u20-linux-i586.rpm D: opening db environment /var/lib/rpm/Packages joinenv D: opening db index /var/lib/rpm/Packages rdonly mode=0x0 D: locked db index /var/lib/rpm/Packages D: opening db index /var/lib/rpm/Name rdonly mode=0x0 error: package jre-6u20-linux-i586.rpm is not installed D: closed db index /var/lib/rpm/Name D: closed db index /var/lib/rpm/Packages D: closed db environment /var/lib/rpm/Packages [root@host java]# rpm -qi --scripts jre-6u20-linux-i586.rpm package jre-6u20-linux-i586.rpm is not installed [root@host java]# I couldn't find any results on Google for any parts of that error message, and I have very little experience of rpm (I usually use Debian). Is this a broken package, or am I missing something or some setting?

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Server error 500: Undefinable problem with my Zend Framework based site

- by sanders

Hello everyone, Lately I had to reinstall my development site on my ubuntu machine since my system crashed after an os update. 4 days later my site is still not running as it should. Whenever i do an action which has in it an action on a database, it stops working. For example when Registring a new user, i get the following error: [Sun Jul 25 20:07:20 2010] [error] [client 127.0.0.1] PHP Notice: Trying to get property of non-object in /var/www/nrka2/application/bootstrap/Bootstrap.php on line 169, referer: http://nrka2/user/register [Sun Jul 25 20:07:20 2010] [error] [client 127.0.0.1] PHP Stack trace:, referer: http://nrka2/user/register [Sun Jul 25 20:07:20 2010] [error] [client 127.0.0.1] PHP 1. {main}() /var/www/nrka2/public/index.php:0, referer: http://nrka2/user/register [Sun Jul 25 20:07:20 2010] [error] [client 127.0.0.1] PHP 2. require() /var/www/nrka2/public/index.php:2, referer: http://nrka2/user/register [Sun Jul 25 20:07:20 2010] [error] [client 127.0.0.1] PHP 3. Zend_Application->bootstrap() /var/www/nrka2/application/application.php:23, referer: http://nrka2/user/register [Sun Jul 25 20:07:20 2010] [error] [client 127.0.0.1] PHP 4. Zend_Application_Bootstrap_BootstrapAbstract->bootstrap() /var/www/Zend/ZendFramework-1.10.6/library/Zend/Application.php:355, referer: http://nrka2/user/register [Sun Jul 25 20:07:20 2010] [error] [client 127.0.0.1] PHP 5. Zend_Application_Bootstrap_BootstrapAbstract->_bootstrap() /var/www/Zend/ZendFramework-1.10.6/library/Zend/Application/Bootstrap/BootstrapAbstract.php:583, referer: http://nrka2/user/register [Sun Jul 25 20:07:20 2010] [error] [client 127.0.0.1] PHP 6. Zend_Application_Bootstrap_BootstrapAbstract->_executeResource() /var/www/Zend/ZendFramework-1.10.6/library/Zend/Application/Bootstrap/BootstrapAbstract.php:619, referer: http://nrka2/user/register [Sun Jul 25 20:07:20 2010] [error] [client 127.0.0.1] PHP 7. Bootstrap->_initViewSettings() /var/www/Zend/ZendFramework-1.10.6/library/Zend/Application/Bootstrap/BootstrapAbstract.php:666, referer: http://nrka2/user/register [Sun Jul 25 20:07:22 2010] [error] [client 127.0.0.1] PHP Notice: Trying to get property of non-object in /var/www/nrka2/application/bootstrap/Bootstrap.php on line 169, referer: http://nrka2/css/main.css [Sun Jul 25 20:07:22 2010] [error] [client 127.0.0.1] PHP Stack trace:, referer: http://nrka2/css/main.css [Sun Jul 25 20:07:22 2010] [error] [client 127.0.0.1] PHP 1. {main}() /var/www/nrka2/public/index.php:0, referer: http://nrka2/css/main.css [Sun Jul 25 20:07:22 2010] [error] [client 127.0.0.1] PHP 2. require() /var/www/nrka2/public/index.php:2, referer: http://nrka2/css/main.css [Sun Jul 25 20:07:22 2010] [error] [client 127.0.0.1] PHP 3. Zend_Application->bootstrap() /var/www/nrka2/application/application.php:23, referer: http://nrka2/css/main.css [Sun Jul 25 20:07:22 2010] [error] [client 127.0.0.1] PHP 4. Zend_Application_Bootstrap_BootstrapAbstract->bootstrap() /var/www/Zend/ZendFramework-1.10.6/library/Zend/Application.php:355, referer: http://nrka2/css/main.css [Sun Jul 25 20:07:22 2010] [error] [client 127.0.0.1] PHP 5. Zend_Application_Bootstrap_BootstrapAbstract->_bootstrap() /var/www/Zend/ZendFramework-1.10.6/library/Zend/Application/Bootstrap/BootstrapAbstract.php:583, referer: http://nrka2/css/main.css [Sun Jul 25 20:07:22 2010] [error] [client 127.0.0.1] PHP 6. Zend_Application_Bootstrap_BootstrapAbstract->_executeResource() /var/www/Zend/ZendFramework-1.10.6/library/Zend/Application/Bootstrap/BootstrapAbstract.php:619, referer: http://nrka2/css/main.css [Sun Jul 25 20:07:22 2010] [error] [client 127.0.0.1] PHP 7. Bootstrap->_initViewSettings() /var/www/Zend/ZendFramework-1.10.6/library/Zend/Application/Bootstrap/BootstrapAbstract.php:666, referer: http://nrka2/css/main.css My Bootstrap class looks like this: <?php class Bootstrap extends Zend_Application_Bootstrap_Bootstrap{ /** * * @var unknown_type */ public $frontcontroller; /** * * @var unknown_type */ protected $_logger; /** * * @var unknown_type */ protected $_acl; /** * * @var unknown_type */ protected $_auth; /** * Setup the logging */ protected function _initLogging() { $this->bootstrap('frontController'); $logger = new Zend_Log(); $writer = 'production' == $this->getEnvironment() ? new Zend_Log_Writer_Stream(APPLICATION_PATH . '/../data/logs/app.log') : new Zend_Log_Writer_Firebug(); $logger->addWriter($writer); if ('production' == $this->getEnvironment()) { $filter = new Zend_Log_Filter_Priority(Zend_Log::CRIT); $logger->addFilter($filter); } $this->_logger = $logger; Zend_Registry::set('log', $logger); } protected function _initDefaultModuleAutoloader(){ $this->_logger->info('Bootstrap '. __METHOD__); $this->_resourceLoader = new Zend_Application_Module_Autoloader(array( 'namespace' => 'EventManager', 'basePath' => APPLICATION_PATH . '/modules/eventManager', )); $this->_resourceLoader->addResourceTypes(array( 'modelResource' => array( 'path' => 'models/resources', 'namespace' => 'Resource', ), 'service' => array( 'path' => 'services', 'namespace' => 'Service' ), )); } // @todo develop this function protected function _initDbProfiler(){ $this->_logger->info('Bootstrap ' . __METHOD__); if ('production' !== $this->getEnvironment()) { $this->bootstrap('db'); $profiler = new Zend_Db_Profiler_Firebug('All DB Queries'); $profiler->setEnabled(true); $this->getPluginResource('db')->getDbAdapter()->setProfiler($profiler); } } /** * Add Controller Action Helpers */ protected function _initActionHelpers() { $this->_logger->info('Bootstrap ' . __METHOD__); Zend_Controller_Action_HelperBroker::addHelper(new SF_Controller_Helper_Acl()); Zend_Controller_Action_HelperBroker::addHelper(new SF_Controller_Helper_RedirectCommon()); Zend_Controller_Action_HelperBroker::addHelper(new SF_Controller_Helper_Service()); } /** * * @return unknown_type */ protected function _initRoutes(){ $this->_logger->info('Initialize Routes '. __METHOD__); $this->bootstrap('frontController'); $router = $this->frontController->getRouter(); $route = new Zend_Controller_Router_route( 'register', array( 'controller' => 'user', 'action' => 'register' ) ); $router->addRoute('register',$route); $route = new Zend_Controller_Router_route( 'login', array( 'controller' => 'user', 'action' => 'login' ) ); $router->addRoute('login',$route); $route = new Zend_Controller_Router_route( 'logout', array( 'controller' => 'user', 'action' => 'logout' ) ); $router->addRoute('logout',$route); } /** * * @return void */ protected function _initLocale(){ $this->_logger->info('Bootstrap '.__METHOD__); $locale = new Zend_Locale('nl_NL'); Zend_Registry::set('Zend_Locale', $locale); } protected function _initAcl(){ $this->_acl = new EventManager_Service_Acl(); } /** * * @return void */ protected function _initViewSettings(){ $this->_logger->info('Bootstrap '.__METHOD__); $this->bootstrap('view'); $this->bootstrap('Acl'); $this->_view = $this->getResource('view'); //set encoding and doctype $this->_view->setEncoding('UTF-8'); $this->_view->doctype('XHTML1_STRICT'); $this->_view->headMeta()->appendHttpEquiv('Content-Type', 'text/html; charset=UTF-8'); $this->_view->headMeta()->appendHttpEquiv('Content-Language', 'en-US'); //@todo op een later moment moeten hier nog de stylesheets worden toegevoegd $this->_view->headLink()->appendStylesheet('/css/main.css'); //$this->_view->headTitle('Event Manager'); /* Set the head style. $this->_view->headTitle->headStyle(); */ $this->_view->headTitle()->setSeparator(' - '); $this->_auth = Zend_Auth::getInstance(); $navigation = new Zend_Config_Xml(APPLICATION_PATH.'/configs/navigation.xml','nav'); $navContainer = new Zend_Navigation($navigation); $this->_view->navigation($navContainer)->setAcl($this->_acl)->setRole($this->_auth->getStorage()->read()->usr_role); //THIS IS LINE 169!!!!!!!!! } /** * Add graceful error handling to the dispatch, this will handle * errors during Front Controller dispatch. */ public function run() { $errorHandling = $this->getOption('errorhandling'); try { parent::run(); } catch(Exception $e) { if (true == (bool) $errorHandling['graceful']) { $this->__handleErrors($e, $errorHandling['email']); } else { throw $e; } } } /** * Handle errors gracefully, this will work as long as the views, * and the Zend classes are available * * @param Exception $e * @param string $email */ protected function __handleErrors(Exception $e, $email) { header('HTTP/1.1 500 Internal Server Error'); $view = new Zend_View(); $view->addScriptPath(dirname(__FILE__) . '/../views/scripts'); echo $view->render('fatalError.phtml'); if ('' != $email) { $mail = new Zend_Mail(); $mail->setSubject('Fatal error in application Storefront'); $mail->addTo($email); $mail->setBodyText( $e->getFile() . "\n" . $e->getMessage() . "\n" . $e->getTraceAsString() . "\n" ); @$mail->send(); } } } I have tried to debug my code, but everyting goes well until I do somethign with the db. But I don't know what goes wrong with the db. I don't get any clear error messages. Can someone help me? Some more possible interesting data: [bootstrap] resources.db.adapter = "PDO_MYSQL" resources.db.isdefaulttableadapter = true resources.db.params.dbname = "ladosa" resources.db.params.username = "root" resources.db.params.password = "root" resources.db.params.hostname = "localhost" resources.db.params.charset = "UTF8" resources.db.params.profiler.enabled = true resources.db.params.profiler.class = Zend_Db_Profiler_Firebug Autoloadernamespaces[] = "Zend_" Autoloadernamespaces[] = "SF_" phpsettings.display_errors = 0 phpsettings.error_reporting = 8191 phpSettings.date.timezone = "Europe/Amsterdam" bootstrap.path = APPLICATION_PATH"/bootstrap/Bootstrap.php" pluginPaths.resource_ = APPLICATION_PATH"/resources" resources.frontcontroller.moduledirectory = APPLICATION_PATH"/modules" resources.frontcontroller.defaultmodule = "eventManager" resources.frontcontroller.params.prefixDefaultModule = true resources.frontcontroller.exceptions = false resources.view[] = "" resources.layout.layoutPath = APPLICATION_PATH "/layouts/scripts" resources.view.encoding = "UTF-8" resources.view.title = Rode kruis Vrijwilligers applicatie ;resources.view.helperPath.Default_View_Helper = APPLICATION_PATH "/modules/eventManager/views/helpers" resources.layout.layout = "main" [production:bootstrap] [development:bootstrap] ;resources.frontController.throwExceptions = 1 ;phpSettings.display_startup_errors=1 ;phpSettings.display_errors = 1 ;resources.frontcontroller.throwerrors = [test:production] btw. I CAN login to my database command line with the given username and password. Update: today i decided to investigate on my http request and i came to an error 500. My apache logs don't give any related information, I think. I posted the logs above. Any idea's?

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Server error 500: Undefinable problem with my Zend Framework based site

- by sanders

Lately I had to reinstall my development site on my ubuntu machine since my system crashed after an os update. 4 days later my site is still not running as it should. Whenever i do an action which has in it an action on a database, it stops working. For example when Registring a new user, i get the following error: [Sun Jul 25 20:07:20 2010] [error] [client 127.0.0.1] PHP Notice: Trying to get property of non-object in /var/www/nrka2/application/bootstrap/Bootstrap.php on line 169, referer: http://nrka2/user/register [Sun Jul 25 20:07:20 2010] [error] [client 127.0.0.1] PHP Stack trace:, referer: http://nrka2/user/register [Sun Jul 25 20:07:20 2010] [error] [client 127.0.0.1] PHP 1. {main}() /var/www/nrka2/public/index.php:0, referer: http://nrka2/user/register [Sun Jul 25 20:07:20 2010] [error] [client 127.0.0.1] PHP 2. require() /var/www/nrka2/public/index.php:2, referer: http://nrka2/user/register [Sun Jul 25 20:07:20 2010] [error] [client 127.0.0.1] PHP 3. Zend_Application->bootstrap() /var/www/nrka2/application/application.php:23, referer: http://nrka2/user/register [Sun Jul 25 20:07:20 2010] [error] [client 127.0.0.1] PHP 4. Zend_Application_Bootstrap_BootstrapAbstract->bootstrap() /var/www/Zend/ZendFramework-1.10.6/library/Zend/Application.php:355, referer: http://nrka2/user/register [Sun Jul 25 20:07:20 2010] [error] [client 127.0.0.1] PHP 5. Zend_Application_Bootstrap_BootstrapAbstract->_bootstrap() /var/www/Zend/ZendFramework-1.10.6/library/Zend/Application/Bootstrap/BootstrapAbstract.php:583, referer: http://nrka2/user/register [Sun Jul 25 20:07:20 2010] [error] [client 127.0.0.1] PHP 6. Zend_Application_Bootstrap_BootstrapAbstract->_executeResource() /var/www/Zend/ZendFramework-1.10.6/library/Zend/Application/Bootstrap/BootstrapAbstract.php:619, referer: http://nrka2/user/register [Sun Jul 25 20:07:20 2010] [error] [client 127.0.0.1] PHP 7. Bootstrap->_initViewSettings() /var/www/Zend/ZendFramework-1.10.6/library/Zend/Application/Bootstrap/BootstrapAbstract.php:666, referer: http://nrka2/user/register [Sun Jul 25 20:07:22 2010] [error] [client 127.0.0.1] PHP Notice: Trying to get property of non-object in /var/www/nrka2/application/bootstrap/Bootstrap.php on line 169, referer: http://nrka2/css/main.css [Sun Jul 25 20:07:22 2010] [error] [client 127.0.0.1] PHP Stack trace:, referer: http://nrka2/css/main.css [Sun Jul 25 20:07:22 2010] [error] [client 127.0.0.1] PHP 1. {main}() /var/www/nrka2/public/index.php:0, referer: http://nrka2/css/main.css [Sun Jul 25 20:07:22 2010] [error] [client 127.0.0.1] PHP 2. require() /var/www/nrka2/public/index.php:2, referer: http://nrka2/css/main.css [Sun Jul 25 20:07:22 2010] [error] [client 127.0.0.1] PHP 3. Zend_Application->bootstrap() /var/www/nrka2/application/application.php:23, referer: http://nrka2/css/main.css [Sun Jul 25 20:07:22 2010] [error] [client 127.0.0.1] PHP 4. Zend_Application_Bootstrap_BootstrapAbstract->bootstrap() /var/www/Zend/ZendFramework-1.10.6/library/Zend/Application.php:355, referer: http://nrka2/css/main.css [Sun Jul 25 20:07:22 2010] [error] [client 127.0.0.1] PHP 5. Zend_Application_Bootstrap_BootstrapAbstract->_bootstrap() /var/www/Zend/ZendFramework-1.10.6/library/Zend/Application/Bootstrap/BootstrapAbstract.php:583, referer: http://nrka2/css/main.css [Sun Jul 25 20:07:22 2010] [error] [client 127.0.0.1] PHP 6. Zend_Application_Bootstrap_BootstrapAbstract->_executeResource() /var/www/Zend/ZendFramework-1.10.6/library/Zend/Application/Bootstrap/BootstrapAbstract.php:619, referer: http://nrka2/css/main.css [Sun Jul 25 20:07:22 2010] [error] [client 127.0.0.1] PHP 7. Bootstrap->_initViewSettings() /var/www/Zend/ZendFramework-1.10.6/library/Zend/Application/Bootstrap/BootstrapAbstract.php:666, referer: http://nrka2/css/main.css My Bootstrap class looks like this: <?php class Bootstrap extends Zend_Application_Bootstrap_Bootstrap{ /** * * @var unknown_type */ public $frontcontroller; /** * * @var unknown_type */ protected $_logger; /** * * @var unknown_type */ protected $_acl; /** * * @var unknown_type */ protected $_auth; /** * Setup the logging */ protected function _initLogging() { $this->bootstrap('frontController'); $logger = new Zend_Log(); $writer = 'production' == $this->getEnvironment() ? new Zend_Log_Writer_Stream(APPLICATION_PATH . '/../data/logs/app.log') : new Zend_Log_Writer_Firebug(); $logger->addWriter($writer); if ('production' == $this->getEnvironment()) { $filter = new Zend_Log_Filter_Priority(Zend_Log::CRIT); $logger->addFilter($filter); } $this->_logger = $logger; Zend_Registry::set('log', $logger); } protected function _initDefaultModuleAutoloader(){ $this->_logger->info('Bootstrap '. __METHOD__); $this->_resourceLoader = new Zend_Application_Module_Autoloader(array( 'namespace' => 'EventManager', 'basePath' => APPLICATION_PATH . '/modules/eventManager', )); $this->_resourceLoader->addResourceTypes(array( 'modelResource' => array( 'path' => 'models/resources', 'namespace' => 'Resource', ), 'service' => array( 'path' => 'services', 'namespace' => 'Service' ), )); } // @todo develop this function protected function _initDbProfiler(){ $this->_logger->info('Bootstrap ' . __METHOD__); if ('production' !== $this->getEnvironment()) { $this->bootstrap('db'); $profiler = new Zend_Db_Profiler_Firebug('All DB Queries'); $profiler->setEnabled(true); $this->getPluginResource('db')->getDbAdapter()->setProfiler($profiler); } } /** * Add Controller Action Helpers */ protected function _initActionHelpers() { $this->_logger->info('Bootstrap ' . __METHOD__); Zend_Controller_Action_HelperBroker::addHelper(new SF_Controller_Helper_Acl()); Zend_Controller_Action_HelperBroker::addHelper(new SF_Controller_Helper_RedirectCommon()); Zend_Controller_Action_HelperBroker::addHelper(new SF_Controller_Helper_Service()); } /** * * @return unknown_type */ protected function _initRoutes(){ $this->_logger->info('Initialize Routes '. __METHOD__); $this->bootstrap('frontController'); $router = $this->frontController->getRouter(); $route = new Zend_Controller_Router_route( 'register', array( 'controller' => 'user', 'action' => 'register' ) ); $router->addRoute('register',$route); $route = new Zend_Controller_Router_route( 'login', array( 'controller' => 'user', 'action' => 'login' ) ); $router->addRoute('login',$route); $route = new Zend_Controller_Router_route( 'logout', array( 'controller' => 'user', 'action' => 'logout' ) ); $router->addRoute('logout',$route); } /** * * @return void */ protected function _initLocale(){ $this->_logger->info('Bootstrap '.__METHOD__); $locale = new Zend_Locale('nl_NL'); Zend_Registry::set('Zend_Locale', $locale); } protected function _initAcl(){ $this->_acl = new EventManager_Service_Acl(); } /** * * @return void */ protected function _initViewSettings(){ $this->_logger->info('Bootstrap '.__METHOD__); $this->bootstrap('view'); $this->bootstrap('Acl'); $this->_view = $this->getResource('view'); //set encoding and doctype $this->_view->setEncoding('UTF-8'); $this->_view->doctype('XHTML1_STRICT'); $this->_view->headMeta()->appendHttpEquiv('Content-Type', 'text/html; charset=UTF-8'); $this->_view->headMeta()->appendHttpEquiv('Content-Language', 'en-US'); //@todo op een later moment moeten hier nog de stylesheets worden toegevoegd $this->_view->headLink()->appendStylesheet('/css/main.css'); //$this->_view->headTitle('Event Manager'); /* Set the head style. $this->_view->headTitle->headStyle(); */ $this->_view->headTitle()->setSeparator(' - '); $this->_auth = Zend_Auth::getInstance(); $navigation = new Zend_Config_Xml(APPLICATION_PATH.'/configs/navigation.xml','nav'); $navContainer = new Zend_Navigation($navigation); $this->_view->navigation($navContainer)->setAcl($this->_acl)->setRole($this->_auth->getStorage()->read()->usr_role); //THIS IS LINE 169!!!!!!!!! } /** * Add graceful error handling to the dispatch, this will handle * errors during Front Controller dispatch. */ public function run() { $errorHandling = $this->getOption('errorhandling'); try { parent::run(); } catch(Exception $e) { if (true == (bool) $errorHandling['graceful']) { $this->__handleErrors($e, $errorHandling['email']); } else { throw $e; } } } /** * Handle errors gracefully, this will work as long as the views, * and the Zend classes are available * * @param Exception $e * @param string $email */ protected function __handleErrors(Exception $e, $email) { header('HTTP/1.1 500 Internal Server Error'); $view = new Zend_View(); $view->addScriptPath(dirname(__FILE__) . '/../views/scripts'); echo $view->render('fatalError.phtml'); if ('' != $email) { $mail = new Zend_Mail(); $mail->setSubject('Fatal error in application Storefront'); $mail->addTo($email); $mail->setBodyText( $e->getFile() . "\n" . $e->getMessage() . "\n" . $e->getTraceAsString() . "\n" ); @$mail->send(); } } } I have tried to debug my code, but everyting goes well until I do somethign with the db. But I don't know what goes wrong with the db. I don't get any clear error messages. Can someone help me? Some more possible interesting data: [bootstrap] resources.db.adapter = "PDO_MYSQL" resources.db.isdefaulttableadapter = true resources.db.params.dbname = "ladosa" resources.db.params.username = "root" resources.db.params.password = "root" resources.db.params.hostname = "localhost" resources.db.params.charset = "UTF8" resources.db.params.profiler.enabled = true resources.db.params.profiler.class = Zend_Db_Profiler_Firebug Autoloadernamespaces[] = "Zend_" Autoloadernamespaces[] = "SF_" phpsettings.display_errors = 0 phpsettings.error_reporting = 8191 phpSettings.date.timezone = "Europe/Amsterdam" bootstrap.path = APPLICATION_PATH"/bootstrap/Bootstrap.php" pluginPaths.resource_ = APPLICATION_PATH"/resources" resources.frontcontroller.moduledirectory = APPLICATION_PATH"/modules" resources.frontcontroller.defaultmodule = "eventManager" resources.frontcontroller.params.prefixDefaultModule = true resources.frontcontroller.exceptions = false resources.view[] = "" resources.layout.layoutPath = APPLICATION_PATH "/layouts/scripts" resources.view.encoding = "UTF-8" resources.view.title = Rode kruis Vrijwilligers applicatie ;resources.view.helperPath.Default_View_Helper = APPLICATION_PATH "/modules/eventManager/views/helpers" resources.layout.layout = "main" [production:bootstrap] [development:bootstrap] ;resources.frontController.throwExceptions = 1 ;phpSettings.display_startup_errors=1 ;phpSettings.display_errors = 1 ;resources.frontcontroller.throwerrors = [test:production] btw. I CAN login to my database command line with the given username and password. Update: today i decided to investigate on my http request and i came to an error 500. My apache logs don't give any related information, I think. I posted the logs above. Any idea's?

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RuntimeError: maximum recursion depth exceeded while calling a Python object

- by Bilal Basharat

this error arises when i try to run the following test case which is written in models.py of my django app named 'administration' : from django.test import Client, TestCase from django.core import mail class ClientTest( TestCase ): fixtures = [ 'testdata.json' ] def test_get_register( self ): response = self.client.get( '/accounts/register/', {} ) self.assertEqual( response.status_code, 200 ) the error arises at this line specifically: response = self.client.get( '/accounts/register/', {} ) my django version is 1.2.1 and python 2.6 and satchmo version is 0.9.2-pre hg-unknown. I code in windows platform(xp sp2). The command to run test case is: python manage.py test administration the complete error log is as follow: site = by_host(host = 'www.%s' % host, id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 121, in by_host site = by_host(host=host[4:], id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 124, in by_host site = by_host(host = 'www.%s' % host, id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 121, in by_host site = by_host(host=host[4:], id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 124, in by_host site = by_host(host = 'www.%s' % host, id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 121, in by_host site = by_host(host=host[4:], id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 124, in by_host site = by_host(host = 'www.%s' % host, id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 121, in by_host site = by_host(host=host[4:], id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 124, in by_host site = by_host(host = 'www.%s' % host, id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 121, in by_host site = by_host(host=host[4:], id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 124, in by_host site = by_host(host = 'www.%s' % host, id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 121, in by_host site = by_host(host=host[4:], id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 124, in by_host site = by_host(host = 'www.%s' % host, id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 121, in by_host site = by_host(host=host[4:], id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 124, in by_host site = by_host(host = 'www.%s' % host, id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 121, in by_host site = by_host(host=host[4:], id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 124, in by_host site = by_host(host = 'www.%s' % host, id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 121, in by_host site = by_host(host=host[4:], id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 124, in by_host site = by_host(host = 'www.%s' % host, id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 121, in by_host site = by_host(host=host[4:], id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 124, in by_host site = by_host(host = 'www.%s' % host, id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 121, in by_host site = by_host(host=host[4:], id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 124, in by_host site = by_host(host = 'www.%s' % host, id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 121, in by_host site = by_host(host=host[4:], id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 124, in by_host site = by_host(host = 'www.%s' % host, id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 121, in by_host site = by_host(host=host[4:], id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 124, in by_host site = by_host(host = 'www.%s' % host, id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 121, in by_host site = by_host(host=host[4:], id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 124, in by_host site = by_host(host = 'www.%s' % host, id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 121, in by_host site = by_host(host=host[4:], id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 124, in by_host site = by_host(host = 'www.%s' % host, id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 121, in by_host site = by_host(host=host[4:], id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 124, in by_host site = by_host(host = 'www.%s' % host, id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 121, in by_host site = by_host(host=host[4:], id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 124, in by_host site = by_host(host = 'www.%s' % host, id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 121, in by_host site = by_host(host=host[4:], id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 124, in by_host site = by_host(host = 'www.%s' % host, id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 121, in by_host site = by_host(host=host[4:], id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 124, in by_host site = by_host(host = 'www.%s' % host, id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 121, in by_host site = by_host(host=host[4:], id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 124, in by_host site = by_host(host = 'www.%s' % host, id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 121, in by_host site = by_host(host=host[4:], id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 124, in by_host site = by_host(host = 'www.%s' % host, id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 121, in by_host site = by_host(host=host[4:], id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 124, in by_host site = by_host(host = 'www.%s' % host, id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 121, in by_host site = by_host(host=host[4:], id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 124, in by_host site = by_host(host = 'www.%s' % host, id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 121, in by_host site = by_host(host=host[4:], id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 124, in by_host site = by_host(host = 'www.%s' % host, id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 121, in by_host site = by_host(host=host[4:], id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 124, in by_host site = by_host(host = 'www.%s' % host, id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 121, in by_host site = by_host(host=host[4:], id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 124, in by_host site = by_host(host = 'www.%s' % host, id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 121, in by_host site = by_host(host=host[4:], id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 124, in by_host site = by_host(host = 'www.%s' % host, id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 121, in by_host site = by_host(host=host[4:], id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 124, in by_host site = by_host(host = 'www.%s' % host, id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 121, in by_host site = by_host(host=host[4:], id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 124, in by_host site = by_host(host = 'www.%s' % host, id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 121, in by_host site = by_host(host=host[4:], id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 124, in by_host site = by_host(host = 'www.%s' % host, id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 121, in by_host site = by_host(host=host[4:], id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 124, in by_host site = by_host(host = 'www.%s' % host, id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 121, in by_host site = by_host(host=host[4:], id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 124, in by_host site = by_host(host = 'www.%s' % host, id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 121, in by_host site = by_host(host=host[4:], id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 124, in by_host site = by_host(host = 'www.%s' % host, id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 121, in by_host site = by_host(host=host[4:], id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 124, in by_host site = by_host(host = 'www.%s' % host, id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 121, in by_host site = by_host(host=host[4:], id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 124, in by_host site = by_host(host = 'www.%s' % host, id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 121, in by_host site = by_host(host=host[4:], id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 124, in by_host site = by_host(host = 'www.%s' % host, id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 121, in by_host site = by_host(host=host[4:], id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 124, in by_host site = by_host(host = 'www.%s' % host, id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 121, in by_host site = by_host(host=host[4:], id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 124, in by_host site = by_host(host = 'www.%s' % host, id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 121, in by_host site = by_host(host=host[4:], id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 124, in by_host site = by_host(host = 'www.%s' % host, id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 121, in by_host site = by_host(host=host[4:], id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 124, in by_host site = by_host(host = 'www.%s' % host, id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 121, in by_host site = by_host(host=host[4:], id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 124, in by_host site = by_host(host = 'www.%s' % host, id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 121, in by_host site = by_host(host=host[4:], id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 124, in by_host site = by_host(host = 'www.%s' % host, id_only=id_only) File "build\bdist.win32\egg\threaded_multihost\sites.py", line 101, in by_host site = Site.objects.get(domain=host) File "C:\django\django\db\models\manager.py", line 132, in get return self.get_query_set().get(*args, **kwargs) File "C:\django\django\db\models\query.py", line 336, in get num = len(clone) File "C:\django\django\db\models\query.py", line 81, in __len__ self._result_cache = list(self.iterator()) File "C:\django\django\db\models\query.py", line 269, in iterator for row in compiler.results_iter(): File "C:\django\django\db\models\sql\compiler.py", line 672, in results_iter for rows in self.execute_sql(MULTI): File "C:\django\django\db\models\sql\compiler.py", line 717, in execute_sql sql, params = self.as_sql() File "C:\django\django\db\models\sql\compiler.py", line 65, in as_sql where, w_params = self.query.where.as_sql(qn=qn, connection=self.connection) File "C:\django\django\db\models\sql\where.py", line 91, in as_sql sql, params = child.as_sql(qn=qn, connection=connection) File "C:\django\django\db\models\sql\where.py", line 94, in as_sql sql, params = self.make_atom(child, qn, connection) File "C:\django\django\db\models\sql\where.py", line 141, in make_atom lvalue, params = lvalue.process(lookup_type, params_or_value, connection) File "C:\django\django\db\models\sql\where.py", line 312, in process connection=connection, prepared=True) File "C:\django\django\db\models\fields\subclassing.py", line 53, in inner return func(*args, **kwargs) File "C:\django\django\db\models\fields\subclassing.py", line 53, in inner return func(*args, **kwargs) File "C:\django\django\db\models\fields\__init__.py", line 323, in get_db_prep _lookup return [self.get_db_prep_value(value, connection=connection, prepared=prepar ed)] File "C:\django\django\db\models\fields\subclassing.py", line 53, in inner return func(*args, **kwargs) File "C:\django\django\db\models\fields\subclassing.py", line 53, in inner return func(*args, **kwargs) RuntimeError: maximum recursion depth exceeded while calling a Python object ---------------------------------------------------------------------- Ran 7 tests in 48.453s FAILED (errors=1) Destroying test database 'default'...

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Java RMI timeout in callback

- by sakra

We are using Java RMI for communication. An RMI client passes a processing request and an object with a callback method to an RMI server. The server invokes the callback when it is done with processing. The setup is similar to the one described in RMI Callbacks. Occasionally we are getting a "read time out" exception in the server upon invoking the callback method. The callback thread stalls for about a minute before the exception is raised. java.rmi.ConnectIOException: error during JRMP connection establishment; nested exception is: java.net.SocketTimeoutException: Read timed out at sun.rmi.transport.tcp.TCPChannel.createConnection(TCPChannel.java:286) at sun.rmi.transport.tcp.TCPChannel.newConnection(TCPChannel.java:184) at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:110) at java.rmi.server.RemoteObjectInvocationHandler.invokeRemoteMethod(RemoteObjectInvocationHandler.java:178) at java.rmi.server.RemoteObjectInvocationHandler.invoke(RemoteObjectInvocationHandler.java:132) at $Proxy2.finished(Unknown Source) at com.unrisk.db.grid.GridTask.invokeCallback(com.unrisk.db.grid.GridTask:1292) at com.unrisk.db.grid.GridTask.invokeCallbacks(com.unrisk.db.grid.GridTask:1304) at com.unrisk.db.service.tasks.EquityMDTask.afterRun(com.unrisk.db.service.tasks.EquityMDTask:276) at com.unrisk.db.grid.GridTask.run(com.unrisk.db.grid.GridTask:720) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) at java.lang.Thread.run(Thread.java:619) Caused by: java.net.SocketTimeoutException: Read timed out at java.net.SocketInputStream.socketRead0(Native Method) at java.net.SocketInputStream.read(SocketInputStream.java:129) at java.io.BufferedInputStream.fill(BufferedInputStream.java:218) at java.io.BufferedInputStream.read(BufferedInputStream.java:237) at java.io.DataInputStream.readByte(DataInputStream.java:248) at sun.rmi.transport.tcp.TCPChannel.createConnection(TCPChannel.java:228) ... 12 more We are using Sun Java JDK 1.6.0_18 under Windows Server 2003 32-bit. Is it possible to work around the connection problems by tuning RMI related system properties?

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force delete row on django app after migration

- by unsorted

After a migration with south, I ended up deleting a column. Now the current data in one of my tables is screwed up and I want to delete it, but attempts to delete just result in an error: >>> d = Degree.objects.all() >>> d.delete() Traceback (most recent call last): File "<console>", line 1, in <module> File "C:\Python26\lib\site-packages\django\db\models\query.py", line 440, in d elete for i, obj in izip(xrange(CHUNK_SIZE), del_itr): File "C:\Python26\lib\site-packages\django\db\models\query.py", line 106, in _ result_iter self._fill_cache() File "C:\Python26\lib\site-packages\django\db\models\query.py", line 760, in _ fill_cache self._result_cache.append(self._iter.next()) File "C:\Python26\lib\site-packages\django\db\models\query.py", line 269, in i terator for row in compiler.results_iter(): File "C:\Python26\lib\site-packages\django\db\models\sql\compiler.py", line 67 2, in results_iter for rows in self.execute_sql(MULTI): File "C:\Python26\lib\site-packages\django\db\models\sql\compiler.py", line 72 7, in execute_sql cursor.execute(sql, params) File "C:\Python26\lib\site-packages\django\db\backends\util.py", line 15, in e xecute return self.cursor.execute(sql, params) File "C:\Python26\lib\site-packages\django\db\backends\sqlite3\base.py", line 200, in execute return Database.Cursor.execute(self, query, params) DatabaseError: no such column: students_degree.abbrev >>> Is there a simple way to just force a delete? Do I drop the table and then rerun manage.py schemamigration to recreate the table in south?

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ASP.net MVC - Update Model on complex models

- by ludicco

Hi there, I'm struggling myself trying to get the contents of a form which is a complex model and then update the model with that complex model. My account model has many individuals [AcceptVerbs(HttpVerbs.Post)] public ActionResult OpenAnAccount(string area,[Bind(Exclude = "Id")]Account account, [Bind(Prefix="Account.Individuals")] EntitySet<Individual> individuals){ var db = new DB(); account.individuals = invdividuals; db.Accounts.InsertOnSubmit(account); db.SubmitChanges(); } So it works nicely for adding new Records, but not for update them like: [AcceptVerbs(HttpVerbs.Post)] public ActionResult OpenAnAccount(string area,[Bind(Exclude = "Id")]Account account, [Bind(Prefix="Account.Individuals")] EntitySet<Individual> individuals){ var db = new DB(); var record = db.Accounts.Single(a => a.Reference == area); account.individuals = invdividuals; try{ UpdateModel(record, account); // I can't convert account ToValueProvider() db.SubmitChanges(); } catch{ return ... //Error Message } } My problem is being how to use UpdateModel with the account model since it's not a FormCollection. How can I convert it? How can I use ToValueProvider with a complex model? I hope I was clear enough Thanks a lot :)

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Locking a table for getting MAX in LINQ

- by Hossein Margani

Hi Every one! I have a query in LINQ, I want to get MAX of Code of my table and increase it and insert new record with new Code. just like the IDENTITY feature of SQL Server, but here my Code column is char(5) where can be alphabets and numeric. My problem is when inserting a new row, two concurrent processes get max and insert an equal Code to the record. my command is: var maxCode = db.Customers.Select(c=>c.Code).Max(); var anotherCustomer = db.Customers.Where(...).SingleOrDefault(); anotherCustomer.Code = GenerateNextCode(maxCode); db.SubmitChanges(); I ran this command cross 1000 threads and each updating 200 customers, and used a Transaction with IsolationLevel.Serializable, after two or three execution an error occured: using (var db = new DBModelDataContext()) { DbTransaction tran = null; try { db.Connection.Open(); tran = db.Connection.BeginTransaction(IsolationLevel.Serializable); db.Transaction = tran; . . . . tran.Commit(); } catch { tran.Rollback(); } finally { db.Connection.Close(); } } error: Transaction (Process ID 60) was deadlocked on lock resources with another process and has been chosen as the deadlock victim. Rerun the transaction. other IsolationLevels generates this error: Row not found or changed. Please help me, thank you.

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Query eror handling in CodeIgniter

- by Sajith S Narayanan

Hi All, I am trying to execute an MySql query using the CI Active methods. If the query is malformed, then CI invokes internal server error 500 and quits without processing the next steps.. I need to roll back all the other queries processed before that error statement, and the roll back is also not happening.. can you help pls. The code snippets is as below: function dbInsertInformationToDB($data_array) { $returnID = ""; $uniqueDataArray = array(); // I prepare a array of values here $uniqueTableList = filter_unique_tables($data_array[2]); $this->db->trans_begin(); // inserting is done here // when there is a query error in $this->db->insert().. it is not rolling back the previous query executed foreach($uniqueTableList as $table_name) { $uniqueDataArray = filterDataArray($data_array,$table_name,2); $this->db->insert($table_name,$uniqueDataArray); if ($this->db->_error_message()) { $error = "I am caught!!"; } $returnID = $this->db->affected_rows(); } if ($this->db->trans_status() === FALSE) { $this->db->trans_rollback(); } else { $this->db->trans_commit(); } return "ERROR"; }

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