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  • Trying to extend ActionView::Helpers::FormBuilder

    - by nibbo
    Hello I am trying to DRY up some code by moving some logic into the FormBuilder. After reading the documentation about how to select and alternative form builder the logical solution for me seemed to be something like this. In the view <% form_for @event, :builder => TestFormBuilder do |f| %> <%= f.test %> <%= f.submit 'Update' %> <% end %> and then in app/helpers/application_helper.rb module ApplicationHelper class TestFormBuilder < ActionView::Helpers::FormBuilder def test puts 'apa' end end end This, however, gives me an error at the "form_for" uninitialized constant ActionView::Base::CompiledTemplates::TestFormBuilder Where am I doing it wrong?

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  • MySQL Trigger creation

    - by Bruce Garlock
    I have an application where I need to INSERT an auto_increment value from a PK in another table. I know how to do this in PHP, but I need to have this done at the DB level, since I cannot change the program logic. I am new to triggers, so I'm sure this will be an easy answer for someone. Here is what I have so far: DELIMITER // CREATE TRIGGER new_project AFTER INSERT ON m_quality_header FOR EACH ROW BEGIN INSERT INTO m_quality_detail (d_matl_qa_ID) VALUES (NEW.h_matl_qa_ID); END// DELIMITER ; I just want the value of the auto_increment value from h_matl_qa_ID to be inserted as a new record into d_matl_qa_ID. The error I get is: "This version of MySQL doesn't yet support 'multiple triggers with the same action time and event for one table' But, I don't want to update the table that has the trigger, so why is my current code considered a 'multiple' trigger? This is on MySQL 5.0.45-7.el5 running on a CentOS 5 server (64-bit Intel) If I have to, I can modify the PHP code, but that needs to be the last resort.

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  • LINQ-To-SQL and Many-To-Many Relationship Deletions

    - by Jake
    I have a many-to-many relationship between two tables, let's say Friends and Foods. If a friend likes a food I stick a row into the FriendsFoods table, like this: ID Friend Food 1 'Tom' 'Pizza' FriendsFoods has a Primary Key 'ID', and two non-null foreign keys 'Friend' and 'Food' to the 'Friends' and 'Foods' tables, respectively. Now suppose I have a Friend tom .NET object corresponding to 'Tom', and Tom no longer likes pizza (what is wrong with him?) FriendsFoods ff = tom.FriendsFoods.Where(x => x.Food.Name == 'Pizza').Single(); tom.FriendsFoods.Remove(ff); pizza.FriendsFoods.Remove(ff); If I try to SubmitChanges() on the DataContext, I get an exception because it attempts to insert a null into the Friend and Food columns in the FriendsFoods table. I'm sure I can put together some kind of convoluted logic to track changes to the FriendsFoods table, intercept SubmitChanges() calls, etc to try and get this to work the way I want, but is there a nice, clean way to remove a Many-To-Many relationship with LINQ-To-SQL?

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  • Python if statement efficiency

    - by Dennis
    A friend (fellow low skill level recreational python scripter) asked me to look over some code. I noticed that he had 7 separate statements that basically said. if ( a and b and c): do something the statements a,b,c all tested their equality or lack of to set values. As I looked at it I found that because of the nature of the tests, I could re-write the whole logic block into 2 branches that never went more than 3 deep and rarely got past the first level (making the most rare occurrence test out first). if a: if b: if c: else: if c: else: if b: if c: else: if c: To me, logically it seems like it should be faster if you are making less, simpler tests that fail faster and move on. My real questions are 1) When I say if and else, should the if be true, does the else get completely ignored? 2) In theory would if (a and b and c) take as much time as the three separate if statements would?

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  • Overload assignment operator for assigning sql::ResultSet to struct tm

    - by Luke Mcneice
    Are there exceptions for types which can't have thier assignment operator overloaded? Specifically, I'm wanting to overload the assignment operator of a struct tm (from time.h) so I can assign a sql::ResultSet to it. I already have the conversion logic: sscanf(sqlresult->getString("StoredAt").c_str(), "%d-%d-%d %d:%d:%d", &TempTimeStruct->tm_year, &TempTimeStruct->tm_mon, &TempTimeStruct->tm_mday, &TempTimeStruct->tm_hour, &TempTimeStruct->tm_min, &TempTimeStruct->tm_sec); I tried the overload with this: tm& tm::operator=(sql::ResultSet & results) { /*CODE*/ return *this; } However VS08 reports: error C2511: 'tm &tm::operator =(sql::ResultSet &)' : overloaded member function not found in 'tm'

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  • Sonar default, meet "container state was: CONSTRUCTED"

    - by larry cai
    Environment: hudson/sonar/maven2 in ubuntu locally with default parameters And I got the log from hudson below, I can't figure out where is the problem. [INFO] Sonar host: http://localhost:9000 [INFO] Sonar version: 2.0.1 [INFO] [sonar-core:internal {execution: default-internal}] [INFO] Database dialect class org.sonar.api.database.dialect.Derby [INFO] ------------- Analyzing Game of Life business logic module [INFO] ------------------------------------------------------------------------ [ERROR] BUILD ERROR [INFO] ------------------------------------------------------------------------ [INFO] Can not execute Sonar Embedded error: Can not analyze the project Cannot stop. Current container state was: CONSTRUCTED [INFO] ------------------------------------------------------------------------ [INFO] Trace org.apache.maven.lifecycle.LifecycleExecutionException: Can not execute Sonar And I notice it also has problem when run it command line without hudson mvn sonar:sonar

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  • WPF - Drag from withing DataTemplate

    - by Gustavo Cavalcanti
    I have a ListBox displaying employees with a DataTemplate - it looks very similar to this screenshot. I want to be able to click on the employee photo, drag it and drop it somewhere out of the ListBox. How can I do that? I am not sure how to capture the PreviewMouseLeftButtonDown event of the Image, since it's inside the DataTemplate. Edit: The DataTemplate lives in a separate assembly and the drag/drop logic needs to be in the Window that has the ListBox. Edit2: I am thinking that the right way of doing this is using commands, am I right? Thanks!

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  • IComponentActivator Instance

    - by jeffn825
    How can I use an IComponentActivator instance for a component, not just specifying a type. That is, instead of Component.For<XYZ>.Activator<MyComponentActivator>(); I want to be able say Component.For<XYZ>.Activator(new MyComponentActivator(someImportantRuntimeInfo)); Also, is there a way I can choose an activator dynamically for a non specifically registered component? That is, I want to have an activator that looks at the type being resolved, decides if it can activate it, and if not, responsibility for activation should be passed on to the default activator. So basically I want a global IComponentActivator that has the following logic: Create(Type type){ if (ShouldActivate(type)){ DoActivate(type); } else{ // do default activation here somehow } } Thanks!

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  • Performance Testing Versus Unit Testing

    - by Mystagogue
    I'm reading Osherove's "The Art of Unit Testing," and though I've not yet seen him say anything about performance testing, two thoughts still cross my mind: Performance tests generally can't be unit tests, because performance tests generally need to run for long periods of time. Performance tests generally can't be unit tests, because performance issues too often manifest at an integration or system level (or at least the logic of a single unit test needed to re-create the performance of the integration environment would be too involved to be a unit test). Particularly for the first reason stated above, I doubt it makes sense for performance tests to be handled by a unit testing framework (such as NUnit). My question is: do my findings / leanings correspond with the thoughts of the community?

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  • Ubercart add to cart trigger?

    - by RD
    I want to keep track of all items added to uber cart. I.e. Whenever someone clicks ADD TO CART, I want to: create a database entry of the time and item added. This way I can see which items are most clicked on. The logic to add it to a db etc is easy to do. What I need to know is, how do I plug into the "add to cart" part. I.e. How do I know when this has been clicked?

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  • Use of "setTimeout()" in my jQuery Expression

    - by Aaron Salazar
    I'm trying to add the JavaScript function setTimeout() to my jQuery expression. Without the setTimeout() my function loads a partial view with updated information when I enter text into my textbox. But, it loads the information with every keystroke. My logic is that if I can put in a timer then when the user stops typing, a second later the data is updated. As you can see I tried to put a setTimer() in but it doesn't seem to be working. $(function() { $('#DocId').live('keyup', function() { setTimeout(var styleValue = $(this).val(); $('#tableContent').load( '/CurReport/TableResults', { style: $(this).val()}), 1000); }), }); Thank you, Aaron

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  • Converting old WCF service to RIA one

    - by Artur
    Hi there, Currently I have a service that looks like: Some app <-- WCF Service <-- Business Logic <-- Entity Framework Model <-- SQL Database One of "some app" would be Silverlight, but there as well will be lots of other clients (mainly mobile devices). To me the greatest benefit of having RIA services is possibility of making ordinary (not asynchronous) calls from Silverlight. I wondered if there is an easy way of converting what I have so far to be a RIA service? I as well wonder if there is a point of doing so if I plan to use the same service for multiple platforms/clients? Any help/links would be greatly appreciated.

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  • Showing HTML comment strings (<!-- -->) in HTML files

    - by Andrei
    Hello all. I'm building a source code search engine, and I'm returning the results on a HTML page (aspx to be exact, but the view logic is in HTML). When someone searches a string, I also return the whole line of code where this string can be found in a file. However, some lines of code come from HTML/aspx files and these lines contain HTML specific comments (). When I try to print this line on the HTML page, it interprets it as a comment and does not show it on the screen....how should I go about solving this so that it actually shows up? Any help would be welcomed. Thanks. edit: err...i see now that firebug could help me with this: <!-- -->

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  • Finding the maximum number of child nodes in a tree

    - by Jiminizer
    First, I should make it clear that this is required for an academic project. I am trying to find the maximum number of child nodes for any node in a tree, using Common Lisp. My current code is shown below - I'm not 100% on the logic of it, but I feel it should work, however it isn't giving me the required result. (defun breadth (list y) (setf l y) (mapcar #'(lambda (element) (when (listp element) (when (> (breadth element (length element)) l) (setf l (breadth element (length element))) ))) list) l) (defun max-breadth(list) (breadth list (length list)) ) As an example, running (max-breadth '(a ( (b (c d)) e) (f g (h i) j))) should return 4. Does anyone have any ideas where I'm going wrong? I suspect it's related to the second conditional, but I'm not sure.

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  • MVC: Model View Controller -- does the View call the Model?

    - by Gary Green
    I've been reading about MVC design for a while now and it seems officially the View calls objects and methods in the Model, builds and outputs a view. I think this is mainly wrong. The Controller should act and retrieve/update objects inside the Model, select an appropriate View and pass the information to it so it may display. Only crude and rudiementary PHP variables/simple if statements should appear inside the View. If the View gets the information it needs to display from the Model, surely there will be a lot of PHP inside the View -- completely violating the point of seperating presentation logic.

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  • Remove address fields from Mac address book using Applescript

    - by cemregr
    Hello, A Facebook Sync app filled the address fields of my Mac Address Book contacts with their cities. Having tons of people who have useless addresses makes it difficult to search by people on Google Maps app (ending up scrolling through many many people- I only want to see those who have proper addresses entered). I want to clear all the home address fields in my address book using applescript. I wrote something small but couldn't get it to work, probably needs some help from somebody who knows applescript :) tell application "Address Book" repeat with this_person in every person repeat with this_address in every address of this_person if label of this_address is "home" then remove this_address from addresses of this_person end if end repeat end repeat end tell I tried to deduct the logic of multiple addresses/phones from other scripts but could only find adding them, not removing them. Thanks! :)

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  • is_tarfile() returns True for a blank file

    - by Zachary Young
    Hello all, I am testing some logic to handle a user uploading a TAR file. When I feed a blank file to tarfile.is_tarfile() it returns True, which is not what I am expecting: $ touch tartest $ cat tartest $ python -c "import tarfile; print tarfile.is_tarfile('tartest')" True If I add some text to the file, it returns False, which I am expecting: $ echo "not a tar" > tartest $ python -c "import tarfile; print tarfile.is_tarfile('tartest')" False I could add a check at the beginning to check for a zero-length file, but based on the documentation for tarfile.is_tarfile(name) I think this is unecessary: Return True if name is a tar archive file, that the tarfile module can read. I went so far as to check the source, tarfile.py, and I can see that it is checking header blocks but I do not fully understand how it is evaluating those blocks. Am I misreading the documentation and therefore setting unfair expectations? Thank you, Zachary

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  • Python web server

    - by Ben
    Hi I'd like to get suggestions on the best way to serve python scripts up as web pages. Typically I'd like a way for me and my colleagues to write simple web pages with minimal effort ie we focus on the business logic eg creating simple forms etc. Possibly with some way to manage sessions but this is a nice-to-have. It doesn't have to be WYSIWYG as they are developers but we are busy and don't want to spend long turning an idea into reality. It's for internal use so appearances are not paramount. The software required to enable this should be easy to setup and configure. eg adding new directories and python lib dirs should be easy. My first instinct is apache or tomcat with mod_python. Any comments / suggestions welcome. Thanks in advance.

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  • How to embed multiple tags in Rails routes, like Stackoverflow.

    - by Craig
    When one selects a Tag on stackoverflow, it is added to the end of the Url. Add a second Tag and it is add to the end of the Url after the first Tag, with a '+' delimiter. For example, http://stackoverflow.com/questions/tagged/ruby-on-rails+best-practices. How is this implemented? Is this a routing enhancement or some logic contained in the TagsController? Finally, how does one 'extract' these Tags for filtering (assuming that they are not in the params[] array)?

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  • How to Redraw or Refresh a screen

    - by viky
    I am working on a wpf application. Here I need to use System.Windows.Forms.FolderBrowserDialog in my Wpf application. System.Windows.Forms.FolderBrowserDialog openFolderBrowser = new System.Windows.Forms.FolderBrowserDialog(); openFolderBrowser.Description = "Select Resource Path:"; openFolderBrowser.RootFolder = Environment.SpecialFolder.MyComputer; if (openFolderBrowser.ShowDialog() == System.Windows.Forms.DialogResult.OK) { //some logic } when I select a Folder and click OK, I launch another System.Windows.Forms.FolderBrowserDialog with same code, My problem is when I select a Folder and click OK, the shadow of FolderBrowserDialog remains on the screen(means my screen doesn't refresh). I need to minimize or resize it in order to remove the shadow of FolderBrowserDialog. How can I solvet his issue? Any help plz?

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  • Hadoop: Iterative MapReduce Performance

    - by S.N
    Is it correct to say that the parallel computation with iterative MapReduce can be justified only when the training data size is too large for the non-parallel computation for the same logic? I am aware that the there is overhead for starting MapReduce jobs. This can be critical for overall execution time when a large number of iterations is required. I can imagine that the sequential computation is faster than the parallel computation with iterative MapReduce as long as the memory allows to hold a data set in many cases. Is it the only benefit to use the iterative MapReduce? If not, what are the other benefits could be?

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  • The best way to organize WPF projects

    - by Mike
    Hello everybody, I've started recently to develop a new software in WPF, and I still don't know which is the best way to organize the application, to be more productive with Visual Studio and Expression Blend. I noticed 2 annoying things I'd like to solve: I'm using Code Contracts in my projects, and when I run my project with Expression Blend, it launches the static analysis of the code. How can I stop that? Which configuration of the project does Blend use by default? I've tried to disable Code Contracts in a new configuration. It works in VS as the static analysis is not launched, but it has no effects in Blend. I've thinked about splitting the Windows Application in 2 parts: the first one containing the views of the WPF (app.exe) and the second one being the core of the project, with the logic code (app.core.dll), and I would just open the former project in Blend. Any thoughts about that? Thanks in advance Mike

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  • good documentation about "avoid catching throwable", in context of weblogic server

    - by Marcel
    hi all, i am currently refactoring an existing codebase (EJBs...) to rip out all blocks where a Throwable is catched inside of the EJB. try { ... do some business logic } catch(Throwable t){ ... log and swallow ... :-( } i want/need to convince the people around me with proper documentation that "catching throwable" is a no-go for an EJB (we have lots of discussions around this :-(( ). weblogic will handle all the "Error" conditions and maybe invalidate EJBs and put fresh(working) EJBs into the pool. catching Throwable would undermine all these security nets provided by weblogic. and catching throwable is bad practice anyway (but people here are reluctant and use the "throwable" hammer everywhere). is anyone able to point me to some online docs where this behaviour is explained (for weblogic or jboss or...). i searched via google and had a look at the weblogic docs but wasn't able to find anything, just generic java doc. any help highly appreciated cheers marcel

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  • Concurrency Problem in Java ...

    - by Tara Singh
    I am designing a client-server chat application in Java. This is a secure application where the messages are exchanged using cryptographic algorithms. I have one server and it can support many clients. My problem is that when one client logs on the server it works fine, but when another user logs into the system, the server starts giving me bad padding exceptions for the encrypted text. I am not able to figure out the problem, according to my logic, when new connection request to server is made, the server creates a thread for listening to the client. Is it possible that once the instance of thread class is created, it does all the processing correctly for the first client, but not for the second client because the variables in server listener thread class already have some previous value, and thus the encrypted text is not decrypted properly? Please advise how I can make this process more robust so that the number of clients does not affect how well the server functions.

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  • Server Side Javascript

    - by XGreen
    Hi all, I can't help to see in many sites I visit the enthusiasm about server side javascript and the appealing look of a single language governing all tiers of the site. Mozilla Rhino, Aptana Jaxer and various John Resig's articles are some of the highlights of my search. I wanted to ask for some input from you guys on SO. your opinions and preferably experience in this. I do most of the data access and business logic currently either with asp.net or php depending on the hosting package of the client. Is anyone among you who's gave up these for ssjs?

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