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  • Rails 3 plugin - Generate a custom migration file

    - by moshimoshi
    Hi, On this article http://www.themodestrubyist.com/2010/03/16/rails-3-plugins---part-3---rake-tasks-generators-initializers-oh-my/ we can see the following codes which allow to invoke a migration file: class ActsAsTaggableOnMigrationGenerator < Rails::Generators::Base invoke "migration", %(add_fields_to_tags name:string label:string) end The command looks like: $ rails generate acts_as_taggable_on User invoke migration invoke active_record create db/migrate/20100529220831_user.rb error "add_fields_to_tags name:string label:string" [not found] I don't understand why I get this error... and I have 2 questions about: 1/ How can I do to customize the name of the generated file? Just like: 20100529220831_add_tag_field_to_users.rb. 2/ How can I pass in some args such as: $ rails generate acts_as_taggable_on User tag1 tag2 tag2 in order to customize the generating file such as tag1:string tag2:string tag3:string... Many thanks!

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  • What exactly are tuples in Python?

    - by Sergio Tapia
    I'm following a couple of Pythone exercises and I'm stumped at this one. # C. sort_last # Given a list of non-empty tuples, return a list sorted in increasing # order by the last element in each tuple. # e.g. [(1, 7), (1, 3), (3, 4, 5), (2, 2)] yields # [(2, 2), (1, 3), (3, 4, 5), (1, 7)] # Hint: use a custom key= function to extract the last element form each tuple. def sort_last(tuples): # +++your code here+++ return What is a Tuple? Do they mean a List of Lists?

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  • phantom error "error parsing XML: unbound prefix"

    - by Brad Hein
    The error "error parsing XML: unbound prefix" shows up on my main layout: main.xml when I first open Eclipse. To make the error go away, all I have to do is make a modification to the file, then undo it, then hit save (have to make a change in order to be able to save file and thus trigger the new syntax check). My environment is: Fedora Eclipse Platform Version: 3.4.2 Based on build id: 20090211-1700 My target is Android API level 5. The first time I saw the error I spent a long time trying to track down "the problem" but later realized there isn't really a problem, it's just a phantom error. Screenshot: http://i50.tinypic.com/2i89iee.jpg Who should I report this to?

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  • ruby / rails / mysql performance degraded on Snow Leopard

    - by adamaig
    I've burned a bunch of hours on this. I'm not having problems getting things to build, but I am seeing that my test suite runs about 2x slower than when I was on OS X 10.5.x . I've spent a lot of time playing around with different optimization settings (learning to avoid homebrew's llvm-gcc compilation). I've just learned that I needed to tweaks /Library/Preferences/SystemConfiguration/com.apple.Boot.plist in order to get the kernel to boot in 64 bit mode. However, my rails app is still running a bit slower than before, even after warming up the mysql server. So what performance tweaks might i need to look into? Right now the stock ruby 1.8.7 runs faster than 1.9.1 for some things, and I'd really like to know if there is anything I should be looking for. All my dev software has been compiled for x86_64, mysql with -O2 optimization, using regular gcc (not llvm-gcc).

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  • MTU mismatch between GetIfEntry and netsh

    - by ChrisJ
    I'm working on pseudo-transport layer software that runs over UDP, providing reliable connection-oriented transmission, as an alternative to TCP. In order to maximize network efficiency, we query the MTU of the "best" network adapter upon initialization. MIB_IFROW row = {0}; row.dwIndex = dwBestIfIndex; dwRes = GetIfEntry(&row); Searching online I found that you can use the following netsh commands to query for this same value, from a command prompt (not a C++ API) netsh interface ipv4 show interfaces netsh interface ipv4 show subinterfaces The troubling issue is that while row.dwMtu may be set to 1500, snooping the network traffic on the sending laptop shows that our packets are fragmented into 1300 byte packets. netsh also reports that the MTU is 1300. Clearly the value reported by netsh command is the actual used values. Anyone know what API I can call to get the same values as netsh?

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  • accessing $_SESSION when using file_get_contents in PHP

    - by hairdresser-101
    I am basic - intermediate developer using php and am a little stumped as to what I have found. I need some help in understanding how to alleviate this issue: I have a page called send.email.php which sends an email - pretty simple stuff - I pass an order id, it creates job request and sends it out. This works fine when used in the context I developed it (Use javascript to make an AJAX call to the URL and pass the order_id as a query parameter) I am now trying to reuse the exact same page in another application however I am calling it using php file_get_contents($base_url.'admin/send.email.php?order_id='.$order_id). When I call the page this way, the $_SESSION array is empty isempty() = 1. Is this because I am initiating a new session using file_get_contents and the values I stored in the $_SESSION on login are not available to me within there? Any help? Thanks

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  • Can operator= may be not a member?

    - by atch
    Having construction in a form: struct Node { Node():left_(nullptr), right_(nullptr) { } int id_; Node* left_; Node* right_; }; I would like to enable syntax: Node parent; Node child; parent.right_ = child; So in order to do so I need: Node& operator=(Node* left, Node right); but I'm getting msg that operator= has to be a member fnc; Is there any way to circumvent this restriction?

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  • Connect to SVN repository with Netbeans using SVN+SSH

    - by shuby_rocks
    Hello all, I am trying to connect to a SVN server in order to import my project into it with svn+ssh authentication method. I am using the NetBeans IDE (6.8) with subversion plugin installed on Windows XP SP2. I have plink installed with its path set in the Windows PATH env variable. When I use the similar looking repository URL (XXXX and YYYY replaced with sensible things) svn+ssh://XXXX@YYYY/home/dce/svn/trunk along with this external tunnel command plink -l <myUserName> -i C:\\privateKey.ppk I keep getting this error: org.tigris.subversion.javahl.ClientException: Network connection closed unexpectedly I searched about it on the Internet and tried many things but didn't work out. Please help if anybody has some idea what may be going wrong. Thanks a lot in advance.

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  • Using Dynamics AX's Business Conectors to Generate Sales Orders

    - by FelipeFiali
    So, just like the title says, I need to create an application that gets data from another Database, and shoves it through Dynamics AX's throat. This data comes from a portal, not Enterprise Portal, but a PHP one. It stores some data from the order in a separate database. So as said, I need to 'import' that to AX, creating the sales orders with the data I have from the other database. Also I'd like some references on Business Conector too, does it handle all those RECIDS and references that AX uses for me? Thanks in advance. EDIT: OK, I'm able to insert records in AX's database, theres just one problem. I can't generate the internal ID. Like, the 'AccountNum' field for the CustTable. Is there a way to capture it from business connector?

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  • JPA + Hibernate + Named Query + how to JOIN a subquery result

    - by Srihari
    Can anybody help me in converting the following native query into a Named Query? Native Query: SELECT usr1.user_id, urr1.role_id, usr2.user_id, urr2.role_id, usr1.school_id, term.term_name, count(material.material_id) as "Total Book Count", fpc.FOLLETT_PENDING_COUNT as "Follett Pending Count", rrc.RESOLUTION_REQUIRED_COUNT as "Resolution Required Count" FROM va_school sch JOIN va_user_school_rel usr1 on sch.school_id=usr1.school_id JOIN va_user_role_rel urr1 on usr1.user_id=urr1.user_id and urr1.role_id=1001 JOIN va_user_school_rel usr2 on sch.school_id=usr2.school_id JOIN va_user_role_rel urr2 on usr2.user_id=urr2.user_id and urr2.role_id=1002 JOIN va_term term on term.school_id = usr1.school_id JOIN va_class course on course.term_id = term.term_id JOIN va_material material on material.class_id = course.class_id LEFT JOIN (SELECT VA_CLASS.TERM_ID as "TERM_ID", COUNT(*) as "FOLLETT_PENDING_COUNT" FROM VA_CLASS JOIN VA_MATERIAL ON VA_MATERIAL.CLASS_ID = VA_CLASS.CLASS_ID WHERE VA_CLASS.reference_flag = 'A' AND trunc(VA_MATERIAL.FOLLETT_STATUS) = 0 GROUP BY VA_CLASS.TERM_ID) fpc on term.term_id = fpc.term_id LEFT JOIN (SELECT VA_CLASS.TERM_ID as "TERM_ID", COUNT(*) as "RESOLUTION_REQUIRED_COUNT" FROM VA_CLASS JOIN VA_MATERIAL ON VA_MATERIAL.CLASS_ID = VA_CLASS.CLASS_ID WHERE VA_CLASS.reference_flag = 'A' AND trunc(VA_MATERIAL.FOLLETT_STATUS) = 1 GROUP BY VA_CLASS.TERM_ID) rrc on term.term_id = rrc.term_id WHERE course.reference_flag = 'A' GROUP BY usr1.user_id, urr1.role_id, usr2.user_id, urr2.role_id, usr1.school_id, term.term_name, fpc.FOLLETT_PENDING_COUNT, rrc.RESOLUTION_REQUIRED_COUNT ORDER BY usr1.school_id, term.term_name; Thanks in advance. Srihari

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  • Adding a sortcomparefunction to Dynamic Data Grid in flex

    - by Tom
    Hi, I am trying to create a dynamic datagrid in Flex 3, I have a list of columns a list of objects which correspond to datapoints for those columns which I fetch from a url. While the grid works perfectly fine the problem is that sorting on the columns is done in lexical order. I am aware that this can be fixed by adding a sortcomparefunction to a column, which is not easy for this case. I have tried doing var dgc:DataGridColumn = new DataGridColumn(dtf); f1[dtf] = function(obj1:Object, obj2:Object):int { return Comparators.sortNumeric(obj1[dtf],obj2[dtf]); }; dgc.sortCompareFunction = f1[dtf];` But the problem is that the function object that I am creating here is being overwritten in every iteration (as I am adding columns) and eventually all the columns will have sorting done only on the last column added. Suggestions please.

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  • J2me Blackberry Numeric Input

    - by Paul
    Hello, I am developing a blackberry application using j2me and LWUIT (blackberry port). Everything works great except for the TextField in numeric mode. Basically when you have focus on the TextField you have to first go into "NUMERIC" mode (by pressing alt + aA) in order to input, which is not user friendly and a problem. The proposed solution is to use a TextArea instead that allows you to open a NATIVE type input box. The problem there is that the user needs to focus the field and then press the fire button which again is unfriendly. Does anyone know of any simple solutions? The few solutions i have in mind (but not sure how to do them): 1) Capture any keypress on the TextArea and go into NATIVE mode, instead of just the fire key. 2) Put the blackberry input mode into numeric using code for the whole form. Any advice will be appreciated. Many Thanks, Paul

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  • UI-Automation cmdlet not finding the control

    - by sc_ray
    Hi, I am trying to test a WPF application using the UI-Automation framework that MSFT provides. There were a few powershell scripts written that invoked the cmdlets created to manipulate the visual controls of the application. There is a DropDown within my application that has an entry 'DropDownEntry'. In my cmdlet, I am trying to do something as follows: AutomationElement getItem = DropDown.FindFirst(TreeScope.Descendants, new AndCondition( new PropertyCondition(AutomationElement.ControlTypeProperty,ControlType.ListItem), new PropertyCondition(AutomationElement.NameProperty, "DropDownEntry",PropertyConditionFlags.IgnoreCase))); The above given snippet returns 'null' upon execution which essentially means that the above given logic was unable to find my dropdown entry. Can somebody tell me why this might be happening? I checked the name of my control and the values. Everything seems to be in order. I am not sure why this would be happening. Any help would be much appreciated. Thanks

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  • Python: Getting INVALID response from PayPal's Sandbox IPN, slowly going insane...

    - by thepeanut
    Hi All I am trying to implement a simple online payment system using PayPal, however I have tried everything I know and am still getting an INVALID response. I know it's nothing too simple, because I get a VERIFIED response when using the IPN simulator. I have tried putting the items into a dict first, I have tried fixing the encoding, and still nothing. PayPal says the reasons for an INVALID response could be: Sending wrong items or in wrong order (pretty sure it's not this) Sending to the wrong address (definitely not this) Encoding items incorrectly (I dont think it's this, set encoding to UTF-8 on both paypal and my script) The following is the snippet concerned: f = cgi.FieldStorage() newparams = 'cmd=_notify-validate' for key in f.keys(): val = f[key].value newparams += '&' + urlencode({key: val.encode('utf-8')}) req = urllib2.Request(PP_URL, newparams) req.add_header("Content-type", "application/x-www-form-urlencoded") http = urllib2.urlopen(req) ret = http.read() fi.write(ret + '\n') if ret == 'VERIFIED': #*do stuff* Can anyone suggest anything I can do to fix this?! Cheers Sam

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  • Catching an exception when trying to launch a URL service from within Safari on an iPhone

    - by Ariel
    Hey guys, I was wondering if anyone knows - if I have an iPhone app that is registered with a URL service (e.g. alocola://), which means another app can invoke it by calling its URL - is there any way to embed this URL in an HTML page, and catch the exception if the app is not installed on the user's iPhone? Or in other words / more details: I would like to write an app that conforms to some URL invocation (like alocola:// is doing), but would like this app to be launched from a web page read by mobile Safari. However, if the app is not installed on the user's iphone, I would like to be able to display a note saying "you must have the alocola app installed on your iPhone, please download it from the app store by clicking here". Is there a way (perhaps using javascript) to have Safari indicate that the URL cannot be invoked, and catch this in order to display an intelligent message? Thanks :-) Ariel

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  • ruby on rails named scope implementation

    - by Engwan
    From the book Agile Web Development With Rails class Order < ActiveRecord::Base named_scope :last_n_days, lambda { |days| {:conditions => ['updated < ?' , days] } } named_scope :checks, :conditions => {:pay_type => :check} end The statement orders = Orders.checks.last_n_days(7) will result to only one query to the database. How does rails implement this? I'm new to Ruby and I'm wondering if there's a special construct that allows this to happen. To be able to chain methods like that, the functions generated by named_scope must be returning themselves or an object than can be scoped further. But how does Ruby know that it is the last function call and that it should query the database now? I ask this because the statement above actually queries the database and not just returns an SQL statement that results from chaining.

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  • Tomcat JAXB 1 and 2 linkage error

    - by Alex
    I'm running a tomcat 6, spring, apache cxf webservice, know it is a must to add one third party library to my webapp to fulfill an order. I have jaxb-impl-2.1.12.jar for apache cxf in WEB-INF/lib folder and the new library which contains the JAXB 1.0 runtime. JAXB 2 ist used by apache cxf for dynamic clients (i need them). So is there a possibility to run the webapps with both libraries? Error: Caused by: java.lang.LinkageError: You are trying to run JAXB 2.0 runtime but you have old JAXB 1.0 runtime earlier in the classpath. Please remove the JAXB 1.0 runtime for 2.0 runtime to work correctly.

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  • OpenPGP Signing

    - by singpolyma
    I'm reading RFC4880 in an attempt to produce an implementatdion of a subset of OpenPGP (RSA signatures) using http://phpseclib.sourceforge.net/. I have the publickey and compression-literal-signature packets parsed out. I can extract n and e and feed them to Crypt_RSA to construct a verifier. I tell it I'm using sha256. It then needs a "message" and a " signature" parametre. I get the signature data out of the signature packet no problem. The question I have is: what is "message"? According to sec tion 5.2.4 it's some combination of the literal data packet(s?) (their bodies or the whole packet?) and the "hashed" subpackets. Do I just concat all the data packets and the hashed packets together in the order they appear?

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  • Diophantine Equation

    - by lakshmi
    Show that it is possible to buy exactly 50, 51, 52, 53, 54, and 55 McNuggets, by finding solutions to the Diophantine equation. You can solve this in your head, using paper and pencil, or writing a program. However you chose to solve this problem, list the combinations of 6, 9 and 20 packs of McNuggets you need to buy in order to get each of the exact amounts. Given that it is possible to buy sets of 50, 51, 52, 53, 54 or 55 McNuggets by combinations of 6, 9 and 20 packs, show that it is possible to buy 56, 57,..., 65 McNuggets. In other words, show how, given solutions for 50-55, one can derive solutions for 56-65.python

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  • Subsonic 3.0 Query limit with MySQL c#.net LinQ

    - by omegawkd
    Hello, a quick question which may or may not be easily answered. Currently, in order to return a limited result set of data to my calling reference using SubSonic I use a similar function as below: _DataSet = from CatSet in t2_aspnet_shopping_item_category.All() join CatProdAssignedLink in t2_aspnet_shopping_link_categoryproduct.All() on CatSet.CategoryID equals CatProdAssignedLink.CategoryID join ProdSet in t2_aspnet_shopping_item_product.All() on CatProdAssignedLink.ProductID equals ProdSet.ProductID where ProdSet.ProductID == __ProductID orderby CatProdAssignedLink.LinkID ascending select CatSet; and select the first item from the data set. Is there a way to limit the lookup initially to a certain amount of rows? I'm using MySQL as the base database.

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  • Trying to access App.config file for mail settings but fails to work.

    - by mw
    Hello we have a Business Logic Layer which has an Email Services Class. In this class we have a method which will create an email(This part works and compiles fine). However when we try to access the app config file in order to test the method we get an error saying - Can't retrieve the app config mail settings and says all values are null when they are not. Here is the app config section for our code: <mailSettings> <smtp deliveryMethod="Network" from="[email protected]"> <network host="localhost" port="25" defaultCredentials="true"/> </smtp> </mailSettings> Here is there code we use to connect to the app.config: private System.Net.Configuration.MailSettingsSectionGroup mailSettings; SmtpClient client = new SmtpClient(mailSettings.Smtp.Network.Host, mailSettings.Smtp.Network.Port); What are we doing wrong here?

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  • Microsoft T-SQL Counting Consecutive Records

    - by JeffW
    Problem: From the most current day per person, count the number of consecutive days that each person has received 0 points for being good. Sample data to work from : Date Name Points 2010-05-07 Jane 0 2010-05-06 Jane 1 2010-05-07 John 0 2010-05-06 John 0 2010-05-05 John 0 2010-05-04 John 0 2010-05-03 John 1 2010-05-02 John 1 2010-05-01 John 0 Expected answer: Jane was bad on 5/7 but good the day before that. So Jane was only bad 1 day in a row most recently. John was bad on 5/7, again on 5/6, 5/5 and 5/4. He was good on 5/3. So John was bad the last 4 days in a row. Code to create sample data: IF OBJECT_ID('tempdb..#z') IS NOT NULL BEGIN DROP TABLE #z END select getdate() as Date,'John' as Name,0 as Points into #z insert into #z values(getdate()-1,'John',0) insert into #z values(getdate()-2,'John',0) insert into #z values(getdate()-3,'John',0) insert into #z values(getdate()-4,'John',1) insert into #z values(getdate(),'Jane',0) insert into #z values(getdate()-1,'Jane',1) select * from #z order by name,date desc

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  • creating a custom centered cyclic horizontal manager

    - by Hezi
    Trying to create a custom cyclical horizontal manager which will work as follows. It will control several field buttons where the buttons will always be positioned so that the focused button will be in the middle of the screen. As it is a cyclical manager once the focus moves to the right or left button, it will move to the center of the screen and all the buttons will move accordingly (and the last button will become the first to give it an cyclic and endless list feeling) Any idea how to address this? I tried doing this by implementing a custom manager which aligns the buttons according to the required layout. Each time moveFocus() is called I remove all fields (deleteAll() ) and add them again in the right order. Unfortunately this does not work.

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  • Debugging problems in Visual Studio 2005 - No source code available for the current location

    - by espais
    Hi all I've searched up and down Google for others with a similar problem, and while I can find the error I don't think that other people have the same base problem that I do. Basically, I had to create a project for a unit-testing environment in order to run this test suite. First, I add my original C file, compile, and then a test file (C++) is generated. I then exclude my original source from the project, include this test script (which includes the original source at the top), and then run. I can debug the test file fine, but when it jumps to the original C file I get the dreaded 'no source code available for the current location' error. Both files are located within the same location, and I compiled the original file without any issue. Anybody have any thoughts about this? Its driving me crazy!

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  • CALayer drawInContext vs addSublayer

    - by Michael
    How can I use both of these in the same UIView correctly? I have one custom subclassed CALayer in which I draw a pattern within drawInContext I have a another in which I set an overlay PNG image as the contents. I have a third which is just a background. How do I overlay all 3 of these items? [self.layer addSublayer:bottomLayer]; // this line is the problem [squaresLayer drawInContext:viewContext]; [self.layer addSublayer:imgLayer]; The other 2 by themselves draw correctly if I do them in that order. No matter where I try and put bottomLayer, it always prevents squaresLayer from drawing. The reason I need 3 layers is I intend to animate the colors in the background and custom layers. The top layer is just a graphical overlay.

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