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• Django User M2M relationship

  - by Antonio

  When trying to syncdb with the following models: class Contact(models.Model): user_from = models.ForeignKey(User,related_name='from_user') user_to = models.ForeignKey(User, related_name='to_user') class Meta: unique_together = (('user_from', 'user_to'),) User.add_to_class('following', models.ManyToManyField('self', through=Contact, related_name='followers', symmetrical=False)) I get the following error: Error: One or more models did not validate: auth.user: Accessor for m2m field 'following' clashes with related m2m field 'User.followers'. Add a related_name argument to the definition for 'following'. auth.user: Reverse query name for m2m field 'following' clashes with related m2m field 'User.followers'. Add a related_name argument to the definition for 'following'. auth.user: The model User has two manually-defined m2m relations through the model Contact, which is not permitted. Please consider using an extra field on your intermediary model instead. auth.user: Accessor for m2m field 'following' clashes with related m2m field 'User.followers'. Add a related_name argument to the definition for 'following'. auth.user: Reverse query name for m2m field 'following' clashes with related m2m field 'User.followers'. Add a related_name argument to the definition for 'following'.

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• What makes static initialization functions good, bad, or otherwise?

  - by Richard Levasseur

  Suppose you had code like this: _READERS = None _WRITERS = None def Init(num_readers, reader_params, num_writers, writer_params, ...args...): ...logic... _READERS = new ReaderPool(num_readers, reader_params) _WRITERS = new WriterPool(num_writers, writer_params) ...more logic... class Doer: def __init__(...args...): ... def Read(self, ...args...): c = _READERS.get() try: ...work with conn finally: _READERS.put(c) def Writer(...): ...similar to Read()... To me, this is a bad pattern to follow, some cons: Doers can be created without its preconditions being satisfied The code isn't easily testable because ConnPool can't be directly mocked out. Init has to be called right the first time. If its changed so it can be called multiple times, extra logic has to be added to check if variables are already defined, and lots of NULL values have to be passed around to skip re-initializing. In the event of threads, the above becomes more complicated by adding locking Globals aren't being used to communicate state (which isn't strictly bad, but a code smell) On the other hand, some pros: its very convenient to call Init(5, "user/pass", 2, "user/pass") It simple and "clean" Personally, I think the cons outweigh the pros, that is, testability and assured preconditions outweigh simplicity and convenience.

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• Google App Engine: JDO does the job, JPA does not

  - by Phuong Nguyen de ManCity fan

  I have setup a project using both Jdo and Jpa. I used Jpa Annotation to Declare my Entity. Then I setup my testCases based on LocalTestHelper (from Google App Engine Documentation). When I run the test, a call to makePersistent of Jdo:PersistenceManager is perfectly OK; a call to persist of Jpa:EntityManager raised an error: java.lang.IllegalArgumentException: Type ("org.seamoo.persistence.jpa.model.ExampleModel") is not that of an entity but needs to be for this operation at org.datanucleus.jpa.EntityManagerImpl.assertEntity(EntityManagerImpl.java:888) at org.datanucleus.jpa.EntityManagerImpl.persist(EntityManagerImpl.java:385) Caused by: org.datanucleus.exceptions.NoPersistenceInformationException: The class "org.seamoo.persistence.jpa.model.ExampleModel" is required to be persistable yet no Meta-Data/Annotations can be found for this class. Please check that the Meta-Data/annotations is defined in a valid file location. at org.datanucleus.ObjectManagerImpl.assertClassPersistable(ObjectManagerImpl.java:3894) at org.datanucleus.jpa.EntityManagerImpl.assertEntity(EntityManagerImpl.java:884) ... 27 more How can it be the case? Below is the link to the source code of the maven projects that reproduce that problem: http://seamoo.com/jpa-bug-reproduce.tar.gz Execute the maven test goal over the parent pom you will notice that 3/4 tests from org.seamoo.persistence.jdo.JdoGenericDAOImplTest passed, while all tests from org.seamoo.persistence.jpa.JpaGenericDAOImplTest failed.

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• New To StructureMap - Getting No Default Instance Error 202

  - by Code Sherpa

  Hi. I am very new to StructureMap and am getting the following error: StructureMap Exception Code: 202 No Default Instance defined for PluginFamily Company.ProjectCore.Core.IUserSession, Company.ProjectCore, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null It seems to be hitting the first interface instance on compile and then throws the above error: private readonly IUserSession _userSession; public SiteMaster() { _userSession = ObjectFactory.GetInstance<IUserSession>(); // ERROR THROWN HERE ... } For what it is worth, I have the PluginFamily reference above all of interfaces: [PluginFamily("Default")] public interface IUserSession Below is my entire StructureMap.config <StructureMap> <Assembly Name="Company.ProjectWeb" /> <Assembly Name="Company.ProjectCore" /> <!-- Use DefaultKey="Default" for standard cache or DefaultKey="MemCached" for memcached cache. --> <PluginFamily Assembly="Company.ProjectCore" Type="Company.ProjectCore.Core.ICache" DefaultKey="MemCached" /> <!-- Use DefaultKey="Default" for sending the email in real time through the configured mail server or use DefaultKey="MailQueue" to send the mail in batches through another process --> <PluginFamily Assembly="Company.ProjectCore" Type="Company.ProjectCore.Core.IEmailService" DefaultKey="MailQueue" /> <!-- Use DefaultKey="Default" for standard cache or DefaultKey="UserSession" for memcached cache. --> <PluginFamily Assembly="Company.ProjectCore" Type="Company.ProjectCore.Core.IUserSession" DefaultKey="UserSession" /> <!-- Use DefaultKey="Default" for standard cache or DefaultKey="Redirector" for memcached cache. --> <PluginFamily Assembly="Company.ProjectCore" Type="Company.ProjectCore.Core.IRedirector" DefaultKey="Redirector" /> <!-- Use DefaultKey="Default" for standard cache or DefaultKey="Navigation" for memcached cache. --> <PluginFamily Assembly="Company.ProjectCore" Type="Company.ProjectCore.Core.INavigation" DefaultKey="Navigation" /> Any suggestions? Thanks.

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• Strange VS2005 compile errors: unable to locate resource file (because the compiler keeps deleting i

  - by Velika

  I AM GETTING THE FOLLOWING ERROR IN A VERY SIMPLE CLASS LIBRARY: Error 1 Unable to copy file "obj\Debug\SMIT.SysAdmin.BusinessLayer.Resources.resources" to "obj\Debug\SMIT.SysAdmin.BusinessLayer.SMIT.SysAdmin.BusinessLayer.Resources.resources". Could not find file 'obj\Debug\SMIT.SysAdmin.BusinessLayer.Resources.resources'. SMIT.SysAdmin.BusinessLayer Going to the Project Properties-Resource tab, I see that I defined do resources. Still, I tried to delete the resource file and recreate by going to the resource tab. When I recompile, I still get the same error. Why is it even looking for a resource file? I define no resources on teh project properties tab and added no new resource file items. Any suggestions of things to try? Update: I found the missing file in an old backup. I copied it to the location where the compiler expected it, and then successfully recompiled the project that previously had compile time errors. However, when I rebuild the entire solution, it deletes the file that I previously restored and I'm back to where I started. My solution contains several projects (maybe 10 or so). Could VS 2005 be having a problem determining dependencies and the proper order to compile these projects?

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• Invoking ADO.NET from MATLAB

  - by Andrew Shepherd

  It's possible to call .NET from MATLAB, so I thought I would try to use ADO.NET to connect to a database. I seem to have hit a blocking problem - anytime you try and create a Command object, it throws an error. You can try this yourself: >> NET.addAssembly('System.Data'); >> sqlconn = System.Data.SqlClient.SqlConnection(); >> sqlconn.State ans = Closed >> % So far, so good >> sqlcmd = System.Data.SqlClient.SqlCommand(); ??? Error using ==> System.Data.SqlClient.SqlCommand 'Connection' is already defined as a property. >> Does anyone have some insight into this? It seems like a pure and simple bug on MATLAB's part - maybe it happens with every .NET class that happens to have a property called "Connection". Should I just throw in the towel and give up on using MATLAB to talk to a database using .NET?

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• Help with understanding generic relations in Django (and usage in Admin)

  - by saturdayplace

  I'm building a CMS for my company's website (I've looked at the existing Django solutions and want something that's much slimmer/simpler, and that handles our situation specifically.. Plus, I'd like to learn this stuff better). I'm having trouble wrapping my head around generic relations. I have a Page model, a SoftwareModule model, and some other models that define content on our website, each with their get_absolute_url() defined. I'd like for my users to be able to assign any Page instance a list of objects, of any type, including other page instances. This list will become that Page instance's sub-menu. I've tried the following: class Page(models.Model): body = models.TextField() links = generic.GenericRelation("LinkedItem") @models.permalink def get_absolute_url(self): # returns the right URL class LinkedItem(models.Model): content_type = models.ForeignKey(ContentType) object_id = models.PositiveIntegerField() content_object = generic.GenericForeignKey('content_type', 'object_id') title = models.CharField(max_length=100) def __unicode__(self): return self.title class SoftwareModule(models.Model): name = models.CharField(max_length=100) description = models.TextField() def __unicode__(self): return self.name @models.permalink def get_absolute_url(self): # returns the right URL This gets me a generic relation with an API to do page_instance.links.all(). We're on our way. What I'm not sure how to pull off, is on the page instance's change form, how to create the relationship between that page, and any other extant object in the database. My desired end result: to render the following in a template: <ul> {% for link in page.links.all %} <li><a href='{{ link.content_object.get_absolute_url() }}'>{{ link.title }}</a></li> {% endfor%} </ul> Obviously, there's something I'm unaware of or mis-understanding, but I feel like I'm, treading into that area where I don't know what I don't know. What am I missing?

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• Project Euler Question 14 (Collatz Problem)

  - by paradox

  The following iterative sequence is defined for the set of positive integers: n -n/2 (n is even) n -3n + 1 (n is odd) Using the rule above and starting with 13, we generate the following sequence: 13 40 20 10 5 16 8 4 2 1 It can be seen that this sequence (starting at 13 and finishing at 1) contains 10 terms. Although it has not been proved yet (Collatz Problem), it is thought that all starting numbers finish at 1. Which starting number, under one million, produces the longest chain? NOTE: Once the chain starts the terms are allowed to go above one million. I tried coding a solution to this in C using the bruteforce method. However, it seems that my program stalls when trying to calculate 113383. Please advise :) #include <stdio.h> #define LIMIT 1000000 int iteration(int value) { if(value%2==0) return (value/2); else return (3*value+1); } int count_iterations(int value) { int count=1; //printf("%d\n", value); while(value!=1) { value=iteration(value); //printf("%d\n", value); count++; } return count; } int main() { int iteration_count=0, max=0; int i,count; for (i=1; i<LIMIT; i++) { printf("Current iteration : %d\n", i); iteration_count=count_iterations(i); if (iteration_count>max) { max=iteration_count; count=i; } } //iteration_count=count_iterations(113383); printf("Count = %d\ni = %d\n",max,count); }

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• scripsharp reference web service / strongly type to results model

  - by user175528

  With scriptsharp (script#) is it possible to get strong typing when calling a service defined in my web app? The only way I can see is to: 1 - use linked / shared files to shadow copy my results classes / domain models across into my script# lib 2 - replicate my model across in the script# lib and use automapper to validate? 3 - use some .tt to code gen? also, even if I can do this, how do I get around the auto camel-casing script# does, when my service result (asmx) wont do this? (so my JSON response will comback as UserMessage, script# will have changed that to userMessage) basically, what I am looking to use script# to achieve is better compile time support against our domain model when calling and processing services in javascript, so something like this: Scriptlet public static class MyScriptlet { public static void Main() { MyService.Service1("hello", ProcessResponse);} public static void ProcessResponse(MyService.Service1ResponseData resp) { jQuery.Select('#Message').Text(resp.UserMessage); jQuery.Select('#Detail').Text(resp.UserDetail); } Service (in our web app) public class MyService { public class Service1ResponseData { public string UserMessage {get;set;} public string UserDetail {get;set;} } public Service1ResponseData Service1(string user) { return new Service1ResponseData() { UserMessage:"hi",UserDetail:"some text"}; } }

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• jQuery validation: how to customize trigger and response

  - by user302307

  I am new with jQuery. I have a servlet based application which render an HTML form. This form is submitted via a function and the submit button IS NOT submit button in HTML. It's a regular button that calls a javascript function to do the submission. When running the submission function, the servlet also run a function called doCheck() which is in javascript. This doCheck() function can be defined per page basis. if doCheck returns false, then the servlet will stop the submission; else it will submit the form. I want to use jQuery validation to fit the servlet application. Is there a way to customize jQuery validation to be triggered manually (ie. only when doCheck() is executed) but at the same time provides continuous check on the UI (ie. if one type invalid number in date field, it will gives the appropriate msg when onblur event happen)? Is there a way to make jQuery validation return true or false? Thank you.

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• Difference dynamic static 2d array c++

  - by snorlaks

  Hello, Im using opensource library called wxFreeChart to draw some XY charts. In example there is code which uses static array as a serie : double data1[][2] = { { 10, 20, }, { 13, 16, }, { 7, 30, }, { 15, 34, }, { 25, 4, }, }; dataset->AddSerie((double *) data1, WXSIZEOF(dynamicArray)); WXSIZEOF ismacro defined like: sizeof(array)/sizeof(array[0]) In this case everything works great but in my program Im using dynamic arrays (according to users input). I made a test and wrotecode like below: double **dynamicArray = NULL; dynamicArray = new double *[5] ; for( int i = 0 ; i < 5 ; i++ ) dynamicArray[i] = new double[2]; dynamicArray [0][0] = 10; dynamicArray [0][1] = 20; dynamicArray [1][0] = 13; dynamicArray [1][1] = 16; dynamicArray [2][0] = 7; dynamicArray [2][1] = 30; dynamicArray [3][0] = 15; dynamicArray [3][1] = 34; dynamicArray [4][0] = 25; dynamicArray [4][1] = 4; dataset->AddSerie((double *) *dynamicArray, WXSIZEOF(dynamicArray)); But it doesnt work correctly. I mean point arent drawn. I wonder if there is any possibility that I can "cheat" that method and give it dynamic array in way it understands it and will read data from correct place thanks for help

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• I have having following warning in gcc compilation in 32 bit architecture but not having any such wa

  - by thetna

  symbol.c: In function 'symbol_FPrint': symbol.c:1209: warning: format '%ld' expects type 'long int', but argument 3 has type 'SYMBOL' symbol.c: In function 'symbol_FPrintOtter': symbol.c:1236: warning: format '%ld' expects type 'long int', but argument 3 has type 'SYMBOL' symbol.c:1239: warning: format '%ld' expects type 'long int', but argument 3 has type 'SYMBOL' symbol.c:1243: warning: format '%ld' expects type 'long int', but argument 3 has type 'SYMBOL' symbol.c:1266: warning: format '%ld' expects type 'long int', but argument 3 has type 'SYMBOL' In symbol.c 1198 #ifdef CHECK 1199 else { 1200 misc_StartErrorReport(); 1201 misc_ErrorReport("\n In symbol_FPrint: Cannot print symbol.\n"); 1202 misc_FinishErrorReport(); 1203 } 1204 #endif 1205 } 1206 else if (symbol_SignatureExists()) 1207 fputs(symbol_Name(Symbol), File); 1208 else 1209 fprintf(File, "%ld", Symbol); 1210 } And SYMBOL is defined as: typedef size_t SYMBOL When i replaced '%ld' with '%zu' , i got the following warning: symbol.c: In function 'symbol_FPrint': symbol.c:1209: warning: ISO C90 does not support the 'z' printf length modifier Note: From here it has been edited on 26th of march 2010 and and following problem has beeen added because of its similarity to the above mentioned problem. I have following statement: printf("\n\t %4d:%4d:%4d:%4d:%4d:%s:%d", Index, S->info, S->weight, Precedence[Index],S->props,S->name, S->length); The warning I get while compiling in 64 bit architecture is : format ‘%4d’ expects type ‘int’, but argument 5 has type ‘size_t’ here are the definitions of parameter: NAT props; typedef unsigned int NAT; How can i get rid of this so that i can compile without warning in 32 and 64 bit architecture? What can be its solution?

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• XML validation error when using multiple schema files/namespaces

  - by user129609

  Hi, I've been reading a ton about xml and learning a lot but I am stuck on one error. I have a schema defined in multiple files and I can't get it to work. Here is an example ================================== libraryBooks.xsd <?xml version="1.0" encoding="utf-8"?> <xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns="urn:MyNamespace" targetNamespace="urn:MyNamespace" elementFormDefault="qualified" > <xsd:element name="libraryBooks" type="libraryBooksType"/> <xsd:complexType name="libraryBooksType"> <xsd:sequence> <xsd:any minOccurs="0"/> </xsd:sequence> <xsd:attribute name="name" type="xsd:string"/> </xsd:complexType> </xsd:schema> ================================== book.xsd <?xml version="1.0" encoding="utf-8"?> <xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns="urn:MyNamespace2" targetNamespace="urn:MyNamespace2" elementFormDefault="qualified" > <xsd:element name="book" type="booksType"/> <xsd:complexType name="bookType"> <xsd:attribute name="title" type="xsd:string"/> </xsd:complexType> </xsd:schema> ================================== myXml.xml <?xml version="1.0" encoding="utf-8" ?> <libraryBooks xmlns="urn:MyNamespace" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="urn:MyNamespace file:///C:/libraryBooks.xsd" name="CentralLibrary"> <mn2:book xmlns:mn2="file:///C:/book.xsd" title="How to make xml work the way I want"> </mn2:book> </libraryBooks> So the error I get would be "The 'file:///C:/book.xsd:book' element is not found". Any ideas? I'm almost certain it is something simple

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• How does Android decide which background resource to draw on the foreground?

  - by Sebi

  I defined two ImageButton which are contained in a LinearLayout in my XML layout file: <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/tabs" android:layout_width="fill_parent" android:layout_height="wrap_content" android:orientation="horizontal" android:minHeight="40px" android:background="@drawable/library_tabs_background"> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/button_library" android:layout_width="160px" android:paddingTop="7px" android:layout_height="40px" android:paddingLeft="30px" android:orientation="horizontal"> <ImageButton android:id="@+id/list" android:layout_width="110px" android:layout_height="30px" android:src="@drawable/library_tab1_button_active"> </ImageButton> </LinearLayout> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/button_search" android:layout_width="160px" android:paddingTop="7px" android:layout_height="40px" android:orientation="horizontal"> <ImageButton android:id="@+id/search" android:layout_width="110px" android:layout_height="30px" android:src="@drawable/library_tab2_button_deactive"> </ImageButton> </LinearLayout> </LinearLayout> As one can see in the XML file, also the LinearLayout in which the buttons are contained, a background image is set. This two images (the button background and the linearlayout background) are overlapping. So in some views, the button background is in front of the layout background and in other views (im using a view flipper), the background of the layer is in the foreground. How can i set a clear rule? How does Android decide which BackgroundResource to draw first?

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• Com server build using Python on 64-bit Windows 7 machine

  - by Vijayendra Bapte

  Original post is here: http://mail.python.org/pipermail/python-win32/2010-December/011011.html I am using: OS: 64 bit Windows 7 Professional Python: python-2.7.1.amd64 Python win32 extensions: pywin32-214.win-amd64-py2.7 Py2exe: py2exe-0.6.9.win64-py2.7.amd64 I am trying to build icon overlay for Windows. It has worked fine on 32 bit Windows but not working on 64 bit Windows 7. Here are the Python modules I have created for testing: test_icon_overlay.py: ( http://mail.python.org/pipermail/python-win32/attachments/20101229/bb8c78a4/attachment-0002.obj ) com server created in Python for icon overlay which adds check mark overlay icon(C:\icons\test.ico) on "C:\icons" folder setup_VI.py: ( http://mail.python.org/pipermail/python-win32/attachments/20101229/bb8c78a4/attachment-0003.obj ) setup file which creates test_icon_overlay.dll for distribution. icons.zip: ( http://mail.python.org/pipermail/python-win32/attachments/20101229/bb8c78a4/attachment-0001.zip ) for testing you should extract icons.zip inside C:\ Icon overlay appears on C:\icons folder when I execute python test_icon_overlay.py on Windows command prompt and restarts explorer.exe. But its not working with the dll file created using setup_VI.py I have created dll file using python setup_VI.py py2exe and then tried to register it using regsvr32 test_icon_overlay.dll. Registration fails with windows error message Error 0x80040201 while registering shell extension. Then I turned on logger in Python27/Lib/site-packages/py2exe/boot_com_servers.py and here is the traceback which I am getting in comerror.txt on regsvr32 test_icon_overlay.dll PATH is ['C:\\root\\avalon\\module\\sync\\python\\src\\dist\\library.zip'] Traceback (most recent call last): File "boot_com_servers.py", line 37, in <module> pywintypes.error: (126, 'GetModuleFileName', 'The specified module could not be found.') Traceback (most recent call last): File "<string>", line 1, in <module> NameError: name 'DllRegisterServer' is not defined Looks like there might be a problem with win32api.GetModuleFileName(sys.frozendllhandle) or with the dll build on 64-bit Windows 7. Also, I saw that installation of pywin32-214.win-amd64-py2.7 on 64-bit Windows 7 finish with the error message: Snapshot close failed in file object destructor: sys.excepthook is missing lost sys.stderr Is there anything which I am doing wrong? Any help on this is highly appreciated.

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• Not able to use spring Beans outside container . Always picking up WebSphere Context

  - by Abhijit

  We have the a whole lot of spring bean defined in our project which we deploy in Websphere ^. One example being the following: oracle.jdbc.driver.OracleDriver jdbc:oracle:thin:@oracle:1521:OASIS oasis_owner o3ngin33r Now we have a service locator class like following private static ServiceLocator serviceLocator = new ServiceLocator(); private static ApplicationContext beanFactory = new ClassPathXmlApplicationContext(APPLICATION_CONTEXT_LOCATION); protected ServiceLocator() { } public ApplicationContext getBeanFactory() { return beanFactory; } public static ServiceLocator getInstance() { return serviceLocator; Now when I am trying to do this from my jUnit ServiceLocator.getInstance().getBean("oasJdbcData"; getting the following exception Caused by: javax.naming.ServiceUnavailableException: Could not obtain an initial context due to a communication failure. Since no provider URL was specified, the default provider URL of "corbaloc:iiop:[email protected]:2809/NameService" was used. Make sure that any bootstrap address information in the URL is correct and that the target name server is running. Possible causes other than an incorrect bootstrap address or unavailable name server include the network environment and workstation network configuration. [Root exception is org.omg.CORBA.TRANSIENT: java.net.ConnectException: Connection refused: connect:host=192.168.255.1,port=2809 vmcid: IBM minor code: E02 completed: No] at com.ibm.ws.naming.util.WsnInitCtxFactory.mapInitialReferenceFailure(WsnInitCtxFactory.java:1968) at com.ibm.ws.naming.util.WsnInitCtxFactory.mergeWsnNSProperties(WsnInitCtxFactory.java:1172) at com.ibm.ws.naming.util.WsnInitCtxFactory.getRootContextFromServer(WsnInitCtxFactory.java:720) at com.ibm.ws.naming.util.WsnInitCtxFactory.getRootJndiContext(WsnInitCtxFactory.java:643) at com.ibm.ws.naming.util.WsnInitCtxFactory.getInitialContextInternal(WsnInitCtxFactory.java:489) at com.ibm.ws.naming.util.WsnInitCtx.getContext(WsnInitCtx.java:113) at com.ibm.ws.naming.util.WsnInitCtx.getContextIfNull(WsnInitCtx.java:428) at com.ibm.ws.naming.util.WsnInitCtx.lookup(WsnInitCtx.java:144) at javax.naming.InitialContext.lookup(InitialContext.java:361) at org.springframework.jndi.JndiTemplate$1.doInContext(JndiTemplate.java:155) at org.springframework.jndi.JndiTemplate.execute(JndiTemplate.java:88) at org.springframework.jndi.JndiTemplate.lookup(JndiTemplate.java:153) at org.springframework.jndi.JndiTemplate.lookup(JndiTemplate.java:178) at org.springframework.jndi.JndiLocatorSupport.lookup(JndiLocatorSupport.java:104) at org.springframework.jndi.JndiObjectLocator.lookup(JndiObjectLocator.java:105) at org.springframework.jndi.JndiObjectFactoryBean.lookupWithFallback(JndiObjectFactoryBean.java:200) at org.springframework.jndi.JndiObjectFactoryBean.afterPropertiesSet(JndiObjectFactoryBean.java:186) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1368) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1334) ... 33 more which clearly shows it is looking for IntialContext of Websphere which I dont want Any body can tell me what I am doing wrong?

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• ZK: Problem with JavaScript method invoking from action in Google Chrome

  - by Arkady Kashin

  I have a zul file with description of simple window, which contains button with action : <?xml version="1.0" encoding="UTF-8"?> <zk xmlns:html="http://www.w3.org/1999/xhtml" xmlns="http://www.zkoss.org/2005/zul" xmlns:zk="http://www.zkoss.org/2005/zk" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.zkoss.org/2005/zul http://www.zkoss.org/2005/zul/zul.xsd"> <window title="My First Window" border="normal" width="200px"> <button label="click me" action="onclick:initObj()" /> <script type="text/javascript" defer="true"> function initObj() { alert('initObj invoked'); zkJScriptObject.init(); } zkJScriptObject = { init: function () { alert('init invoked'); } }; </script> </window> </zk> Clicking on the button successfully invokes Javascript function initObj() and shows alerts in FireFox and in IE, but in Google Chrome causes error "Uncaught ReferenceError: initObj is not defined"? Do you have any suggestions, what is the reason of that problem in Google Chrome and how can I fix it? P.S. I'm using ZK 3.6.3.

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• JSON / JSONP in JQuery

  - by dotnetgeek

  Hello. I am trying to figure out why my $.getJSON method does not seem to be working but the $.ajax works just fine. First, here is my getJSON call: $.getJSON("http://localhost:1505/getServiceImageList?callback=loadImagesInSelect", loadImagesInSelect); You can see I have tried added the callback parameter directly to the query string (also tried it not on string) and I added a reference to the callback method defined in my js file. Here is the $.ajax call which works just fine: function getImages() { $.ajax({ type: "GET", url: $('#txt_registry_url').val(), dataType: "jsonp", success:loadImagesInSelect , error:function (xhr, ajaxOptions, thrownError) { alert(xhr.status); alert(thrownError); } }); } In this example the url pulled from the text box is the same as in the straight call to getJSON. When the method call completes, the successMethod is called and everything processes just fine. While I am cool with using the later of the two methods, the docs make it seem that the getJSON is the preferred shorthand way of doing things. Can anyone please explain what I am missing on the shorthand method to make it all work? Thanks in advance.

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• How does 'lazy' work?

  - by Matt Fenwick

  What is the difference between these two functions? I see that lazy is intended to be lazy, but I don't understand how that is accomplished. -- | Identity function. id :: a -> a id x = x -- | The call '(lazy e)' means the same as 'e', but 'lazy' has a -- magical strictness property: it is lazy in its first argument, -- even though its semantics is strict. lazy :: a -> a lazy x = x -- Implementation note: its strictness and unfolding are over-ridden -- by the definition in MkId.lhs; in both cases to nothing at all. -- That way, 'lazy' does not get inlined, and the strictness analyser -- sees it as lazy. Then the worker/wrapper phase inlines it. -- Result: happiness Tracking down the note in MkId.lhs (hopefully this is the right note and version, sorry if it's not): Note [lazyId magic] ~~~~~~~~~~~~~~~~~~~ lazy :: forall a?. a? -> a? (i.e. works for unboxed types too) Used to lazify pseq: pseq a b = a `seq` lazy b Also, no strictness: by being a built-in Id, all the info about lazyId comes from here, not from GHC.Base.hi. This is important, because the strictness analyser will spot it as strict! Also no unfolding in lazyId: it gets "inlined" by a HACK in CorePrep. It's very important to do this inlining after unfoldings are exposed in the interface file. Otherwise, the unfolding for (say) pseq in the interface file will not mention 'lazy', so if we inline 'pseq' we'll totally miss the very thing that 'lazy' was there for in the first place. See Trac #3259 for a real world example. lazyId is defined in GHC.Base, so we don't have to inline it. If it appears un-applied, we'll end up just calling it. I don't understand that because it refers to lazyId instead of lazy. How does lazy work?

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• Spring MVC parameter validation

  - by Don

  Hi, I've defined a controller, validator and command class for a Spring 2.5 MVC application like this: public class ResourceController extends AbstractCommandController { private MessageRetriever messageRetriever; protected ModelAndView handle(HttpServletRequest request, HttpServletResponse response, Object command, BindException errors) throws Exception { ResourceCommand resourceCommand = (ResourceCommand) command; // I NEED TO CHECK HERE IF COMMAND IS VALID? } public static class ResourceCommand { private String module; private String site; private String lang; // GETTERS AND SETTERS OMITTED } public static class ResourceValidator implements Validator { public boolean supports(Class clazz) { return ResourceCommand.class.isAssignableFrom(clazz); } public void validate(Object obj, Errors errors) { ValidationUtils.rejectIfEmptyOrWhitespace(errors, "module", "MODULE_REQUIRED"); ValidationUtils.rejectIfEmptyOrWhitespace(errors, "site", "SITE_REQUIRED"); ValidationUtils.rejectIfEmptyOrWhitespace(errors, "lang", "LANG_REQUIRED"); } } } I have wired these all together in the application context: <bean id="resourceController" class="com.amadeus.jcp.ui.framework.localization.ResourceController"> <property name="commandClass" value="com.amadeus.jcp.ui.framework.localization.ResourceController.ResourceCommand"/> <property name="validator"> <bean class="com.amadeus.jcp.ui.framework.localization.ResourceController.ResourceValidator"/> </property> </bean> However, I can't figure out how to actually check whether the command is valid or not - I assume the framework calls the validator, but how do I get access to the result? Incidentally, I'm using Java 1.4, so can't use any solutions that require annotations or other Java 1.5 features. Thanks, Don

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• ASP.NET Content Web Form - content from placeholder disappears

  - by Naeem Sarfraz

  I'm attempting to set a class on the body tag in my asp.net site which uses a master page and content web forms. I simply want to be able to do this by adding a bodycssclass property (see below) to the content web form page directive. It works through the solution below but when i attempt to view Default.aspx the Content1 control loses its content. Any ideas why? Here is how I'm doing it. I have a master page with the following content: <%@ Master Language="C#" ... %> <html><head>...</head> <body id=ctlBody runat=server> <asp:ContentPlaceHolder ID="cphMain" runat="server" /> </body> </html> it's code behind looks like: public partial class Site : MasterPageBase { public override string BodyCssClass { get { return ctlBody.Attributes["class"]; } set { ctlBody.Attributes["class"] = value; } } } it inherits from: public abstract class MasterPageBase : MasterPage { public abstract string BodyCssClass { get; set; } } my default.aspx is defined as: <%@ Page Title="..." [master page definition etc..] bodycssclass="home" %> <asp:Content ID="Content1" ContentPlaceHolderID="cphMain" runat="server"> Some content </asp:Content> the code behind for this file looks like: public partial class Default : PageBase { ... } and it inherits from : public class PageBase : Page { public string BodyCssClass { get { MasterPageBase mpbCurrent = this.Master as MasterPageBase; return mpbCurrent.BodyCssClass; } set { MasterPageBase mpbCurrent = this.Master as MasterPageBase; mpbCurrent.BodyCssClass = value; } } }

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• Run unittest in a Class

  - by chrissygormley

  Hello, I have a test suite to perform smoke tests. I have all my script stored in various classes but when I try and run the test suite I can't seem to get it working if it is in a class. The code is below: (a class to call the tests) from alltests import SmokeTests class CallTests(SmokeTests): def integration(self): self.suite() if __name__ == '__main__': run = CallTests() run.integration() And the test suite: class SmokeTests(): def suite(self): #Function stores all the modules to be tested modules_to_test = ('external_sanity', 'internal_sanity') alltests = unittest.TestSuite() for module in map(__import__, modules_to_test): alltests.addTest(unittest.findTestCases(module)) return alltests if __name__ == '__main__': unittest.main(defaultTest='suite') So I can see how to call a normal function defined but I'm finding it difficult calling in the suite. In one of the tests the suite is set up like so: class InternalSanityTestSuite(unittest.TestSuite): # Tests to be tested by test suite def makeInternalSanityTestSuite(): suite = unittest.TestSuite() suite.addTest(TestInternalSanity("BasicInternalSanity")) suite.addTest(TestInternalSanity("VerifyInternalSanityTestFail")) return suite def suite(): return unittest.makeSuite(TestInternalSanity) If I have def suite() inside the class SmokeTests the script executes but the tests don't run but if I remove the class the tests run. I run this as a script and call in variables into the tests. I do not want to have to run the tests by os.system('python tests.py'). I was hoping to call the tests through the class I have like any other function. This need's to be called from a class as the script that I'm calling it from is Object Oriented. If anyone can get the code to be run using Call Tests I would appreciate it alot. Thanks for any help in advance.

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• Django Class Views and Reverse Urls

  - by kalhartt

  I have a good many class based views that use reverse(name, args) to find urls and pass this to templates. However, the problem is class based views must be instantiated before urlpatterns can be defined. This means the class is instantiated while urlpatterns is empty leading to reverse throwing errors. I've been working around this by passing lambda: reverse(name, args) to my templates but surely there is a better solution. As a simple example the following fails with exception: ImproperlyConfigured at xxxx The included urlconf mysite.urls doesn't have any patterns in it mysite.urls from mysite.views import MyClassView urlpatterns = patterns('', url(r'^$' MyClassView.as_view(), name='home') ) views.py class MyClassView(View): def get(self, request): home_url = reverse('home') return render_to_response('home.html', {'home_url':home_url}, context_instance=RequestContext(request)) home.html <p><a href={{ home_url }}>Home</a></p> I'm currently working around the problem by forcing reverse to run on template rendering by changing views.py to class MyClassView(View): def get(self, request): home_url = lambda: reverse('home') return render_to_response('home.html', {'home_url':home_url}, context_instance=RequestContext(request)) and it works, but this is really ugly and surely there is a better way. So is there a way to use reverse in class based views but avoid the cyclic dependency of urlpatterns requiring view requiring reverse requiring urlpatterns...

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• Javscript closure questions

  - by Shuchun Yang

  While I was reading the book Javascript: The Good Parts. I can not understand the piece of code bellow: We can generalize this by making a function that helps us make memoized functions. The memoizer function will take an initial memo array and the fundamental function. It returns a shell function that manages the memo store and that calls the fundamental function as needed. We pass the shell function and the function's parameters to the fundamental function: var memoizer = function (memo, fundamental) { var shell = function (n) { var result = memo[n]; if (typeof result !== 'number') { result = fundamental(shell, n); memo[n] = result; } return result; }; return shell; }; We can now define fibonacci with the memoizer, providing the initial memo array and fundamental function: var fibonacci = memoizer([0, 1], function (test, n) { return test(n - 1) + test(n - 2); }); My question is what is the test function? When does it get defined and invoked? It seems very confusing to me. Also I think this statement: memo[n] = result; is useless. Please correct if I am wrong.

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• Setting LD_LIBRARY_PATH in Apache PassEnv/SetEnv still cant find library

  - by DoMoreASAP

  I am trying to test the Cybersource 3d party implementation. I was able to get the test files running fine from the command line, which requires that on Linux I export the path to the payment libraries to LD_LIBRARY_PATH. to try to test this on my server I have created the apache config below <VirtualHost 127.0.0.1:12345> AddHandler cgi-script .cgi AddHandler fcgid-script .php .fcgi FCGIWrapper /my/path/to/php_fcgi/bin/php-cgi .php AddType text/html .shtml AddOutputFilter INCLUDES .shtml DocumentRoot /my/path/to/cybersource/simapi-php-5.0.1/ ProxyPreserveHost on <Directory /my/path/to/cybersource/simapi-php-5.0.1> SetEnv LD_LIBRARY_PATH /my/path/to/cybersource/LinkedLibraries/lib/ AllowOverride all Options +Indexes IndexOptions Charset=UTF-8 </Directory> </VirtualHost> I have set the env variable there with SetEnv command, which seems to be working when i run a page that prints <?php phpinfo(); ?> however the test script when called through the browser still wont work, apache says: tail /my/apache/error_log [Tue Mar 30 23:11:46 2010] [notice] mod_fcgid: call /my/path/to/cybersource/index.php with wrapper /my/path/to/cybersource/php_fcgi/bin/php-cgi PHP Warning: PHP Startup: Unable to load dynamic library '/my/path/to/cybersource/extensionsdir/php5_cybersource.so' - libspapache.so: cannot open shared object file: No such file or directory in Unknown on line 0 so it cant find the linked file libspapache.so even though it is in the LD_LIBRARY_PATH that is supposedly defined i really appreciate the help. thanks so much.

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