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  • Joining the same model twice in a clean way, but making the code reusable

    - by Shako
    I have a model Painting which has a Paintingtitle in each language and a Paintingdescription in each language: class Painting < ActiveRecord::Base has_many :paintingtitles, :dependent => :destroy has_many :paintingdescriptions, :dependent => :destroy end class Paintingtitle < ActiveRecord::Base belongs_to :painting belongs_to :language end class Paintingdescription < ActiveRecord::Base belongs_to :painting belongs_to :language end class Language < ActiveRecord::Base has_many :paintingtitles, :dependent => :nullify has_many :paintingdescriptions, :dependent => :nullify has_many :paintings, :through => :paintingtitles end As you might notice, I reference the Language model from my Painting model via both the Paintingtitle model and Paintingdescription model. This works for me when getting a list of paintings with their title and description in a specific language: cond = {"paintingdescription_languages.code" => language_code, "paintingtitle_languages.code" => language_code} cond['paintings.publish'] = 1 unless admin paginate( :all, :select => ["paintings.id, paintings.publish, paintings.photo_file_name, paintingtitles.title, paintingdescriptions.description"], :joins => " INNER JOIN paintingdescriptions ON (paintings.id = paintingdescriptions.painting_id) INNER JOIN paintingtitles ON (paintings.id = paintingtitles.painting_id) INNER JOIN languages paintingdescription_languages ON (paintingdescription_languages.id = paintingdescriptions.language_id) INNER JOIN languages paintingtitle_languages ON (paintingtitle_languages.id = paintingtitles.language_id) ", :conditions => cond, :page => page, :per_page => APP_CONFIG['per_page'], :order => "id DESC" ) Now I wonder if this is a correct way of doing this. I need to fetch paintings with their title and description in different functions, but I don't want to specify this long join statement each time. Is there a cleaner way, for instance making use of the has_many through? e.g. has_many :paintingdescription_languages, :through => :paintingdescriptions, :source => :language has_many :paintingtitle_languages, :through => :paintingtitles, :source => :language But if I implement above 2 lines together with the following ones, then only paintingtitles are filtered by language, and not the paintingdescriptions: cond = {"languages.code" => language_code} cond['paintings.publish'] = 1 unless admin paginate( :all, :select => ["paintings.id, paintings.publish, paintings.photo_file_name, paintingtitles.title, paintingdescriptions.description"], :joins => [:paintingdescription_languages, :paintingtitle_languages], :conditions => cond, :page => page, :per_page => APP_CONFIG['per_page'], :order => "id DESC" )

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  • How to check font-size in IE6+

    - by kumarsfriends
    Hi All, I am wondering is there any way we can test the font size/color of a webpage in IE6+. I think it is not possible by checking the css class, as some other style may overwrite the styles of the class which has been assinged to that text. Actually I want to know the browser assigned font-size to the text of the page, as we can do it in firebug on firefox. Any help would be appreciated.

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  • Silverlight 3 + DataGrid.SelectedItems Question

    - by user208662
    Hello, I am binding a collection of MyItem class instances to a DataGrid. The MyItem class has a property called "IsSelected". This property can get changed programmatically. How do I propogate that change back to the UI such that if this value is true, the row associated with MyItem is highlighted (selected) and if it is false, the row associated with MyItem is not highlighted? Thank you,

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  • User control disapear when added to a Panel

    - by dutt
    I've got a user control class that works fine, drawing, events firing and the works. When i programmaticly add it to a class that extends from Panel it disapears. I've checked around and the line that makes it disapear is the line where i go panel.Controls.Add(myuserControl). Without that line the control works just fine, does anybody know why it won't show after the add? I'm currently doing the painting of the user control by overriding OnPaint, but the panel is using the default painting.

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  • netServiceBrowserDidStopSearch not called

    - by user263569
    I'm now writing a Bonjour service listener class, according to the document here: Currently, it seems working, I can receive "netServiceBrowserWillSearch:" and "didFindService:moreComing:" correctly. However, after a long wait, I cannot receive " netServiceBrowserDidStopSearch:" or "netServiceBrowser:didNotSearch:". Therefore I don't know that is the proper time for my delegate class to stop showing some UI. Could anyone have an idea for this? Thanks.

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  • Feature panel hover changer effect

    - by user1519157
    Haven't seen this before so hopefully someone has a easy solve, I have a 3 feature panel divs side by side, what I want happen is the 1st panel has a "hover" class added so I can change the background etc and then on a timed interval the hover class jumps to the next panel then the next panel then back to the start on a loop. Also on a side note can you keep the code in mind to be able to add more then 3 feature divs so you could have for example 6 or more or less etc.

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  • Rails find through association

    - by yogi
    class Customer < ActiveRecord::Base has_one :address, :foreign_key => "customerid" end class Address < ActiveRecord::Base belongs_to :customer, :foreign_key => "customerid" end How do I find records in customer that do not have customerid in address table? in SQL i'd do select * from customer a, address b where a.customerid <> b.customerid

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  • Dynamically generating method names in rails

    - by badnaam
    I need to generate links in my views using the url helpers such as user_path(@user), the catch is, in some cases I don't know what model I am creating this link for i.e. whether it is a user or a store or someting else I would like to be able to determine this on the fly and call the appropriate view helper, currently I am doing the following, but I am wondering if there is a drier way of doing it. if object.class == "Store" store_path(object) elsif object.class == "User" user_path(object) ...etc

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  • Test if a method is an override?

    - by Water Cooler v2
    Is there a way to tell if a method is an override? For e.g. public class Foo { public virtual void DoSomething() {} public virtual int GimmeIntPleez() { return 0; } } public class BabyFoo: Foo { public override int GimmeIntPleez() { return -1; } } Is it possible to reflect on BabyFoo and tell if GimmeIntPleez is an override?

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  • Java lang object

    - by Neeraj
    why java Object class has two methods hashcode() and equals()? One of them looks redundant and its percolated to the bottom most derived class?

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  • Need help with map (c++, STL)

    - by Mike Dooley
    Hi folks! Actually I'm new to C++. I tried something out (actually the map container) but it doesn't work the way I assumed it will... Before posting my code, I will explain it shortly. I created 3 classes: ClassA ClassDerivedA ClassAnotherDerivedA The two last ones are derived from "ClassA". Further I created a map: map<string,ClassA> test_map; I put some objects (from Type ClassDerivedA and ClassAnotherDerivedA) into the map. Keep in mind: the mapped value is from type "ClassA". This will only work because of Polymorphism. Finally I created an iterator which runs over my map and compares the user input with my keys in the map. If they match, it will call a specific method called "printOutput". And there is the Problem: Although i declared "printOutput" as "virtual" the only method called is the one from my base class, but why? and here is the code: #include <iostream> #include <map> using namespace std; class ClassA { public: virtual void printOutput() { cout << "ClassA" << endl; } }; class ClassDerivedA : public ClassA { public: void printOutput() { cout << "ClassDerivedA" << endl; } }; class ClassAnotherDerivedA: public ClassA { public: void printOutput() { cout << "ClassAnotherDerivedA" << endl; } }; int main() { ClassDerivedA class_derived_a; ClassAnotherDerivedA class_another_a; map<string,ClassA> test_map; test_map.insert(pair<string,ClassA>("deriveda", class_derived_a)); test_map.insert(pair<string,ClassA>("anothera", class_another_a)); string s; while( cin >> s ) { if( s != "quit" ) { map<string,ClassA>::iterator it = test_map.find(s); if(it != test_map.end()) it->second.printOutput(); } else break; } } Blockquote

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  • I can't click the links in Firefox and Chrome (they work in IE7)

    - by janoChen
    Its the weirdest thing I've ever seen. I can't click the last 3 links in the following code (when I use FF or Chrome): HTML: <div id="leftmanulist"> <div class="abouttop"> <ul class="aboutlist"> <li class="index"><a>????</a></li> <li><a href="instruments.html">????</a></li> <li><a href="performance.html">????</a></li> <li><a href="clothes.html">????</a></li> <li><a href="aboutfalundafa.html">??????</a></li> <li><a href="awards.html">????</a></li> </ul> </div> <div class="aboutbutton"></div> </div> CSS: #leftmanulist{ background:url("images/abouttop.gif") no-repeat; float: left; margin: 2px 2px 5px 30px; padding:39px 0 0 0; width:237px;} #leftmanulist ul li{line-height:35px;text-align:left; text-decoration:none;} #leftmanulist ul li a{ text-decoration:none;} #leftmanulist ul li:hover{ color:#0068FF;} #leftmanulist ul li a:hover{ color:#0068FF;} #leftmanulist ul li.index{ color:#0068FF;} #leftmanulist ul li.index a{ color:#0068FF;} .abouttop{background:url("images/leftmanulist_z.gif") repeat-y ; padding:0 6px; position:relative; z-index:0; width:237px;} .aboutlist{position:relative;left:28px;} .aboutbutton{background:url("images/leftmanulist_b.gif") no-repeat; width:237px; height:20px; position:relative; top:-17px; z-index:2;}

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  • C# start a static thread

    - by user595605
    I have a Queue of items I want to process in a thread, and any instance of a class can add items to the Queue to be processed. My idea for doing this is to have a static Thread in the class that processes the items, the only problem is that I don't know where to start this thread, since I can't start it in its initialization. Is there a way I can start a static thread? Or should I be changing the architecture completely?

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  • Large Data Table with first column fixed

    - by bhavya_w
    I have structure as shown in the fiddle http://jsfiddle.net/5LN7U/. <section class="container"> <section class="field"> <ul> <li> Question 1 </li> <li> question 2 </li> <li> question 3 </li> <li> question 4 </li> <li> question 5 </li> <li> question 6 </li> <li> question 7 </li> </ul> </section> <section class="datawrap"> <section class="datawrapinner"> <ul> <li><b>Answer 1 :</b></li> <li><b>Answer 2 :</b></li> <li><b>Answer 3 :</b></li> <li><b>Answer 4 :</b></li> <li><b>Answer 5 :</b></li> <li><b>Answer 6 :</b></li> <li><b>Answer 7 :</b></li> </ul> </section> </section> </section> Basically its a table structure made using divs. The first column contains a long list of questions and the second column contains answers/multiple answers which can be quite big ( there has to be horizontal scrolling in the second column.) The problem i am facing is when i scroll downwards the second column which has the horizontal scroll bar is also scrolling downward. I want horizontal scrollbar to be fixed there. as in it should be always fixed there no matter how much i scroll vertically. Much Like Google Spreadsheets: where the first column stays fixed and there's horizontal scrolling on rest of the columns with over vertical scrolling for whole of the data. I cannot used position fixed in the second column. P.S : please no lectures on using div's for making a table structure. I have my own reasons. and its kinda urgent. Thanks in advance.

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  • jQuery center multiple dynamic images in different sized containers

    - by JVK Design
    So I've found similar questions but none that answer all the questions I have and I know there must be a simple jQuery answer to this. I've got multiple images that are being dynamically placed in their own containing div that have overflow:hidden, they need to fill their containing divs and be centered(horizontally and vertically) also. The containing divs will be different sizes as well. So in short: multiple different sized images fill and center in containing div. containing divs will be different sizes. will be used multiple times on a page. Hopefully this image helps explain what I'm after. Click here to view the image. HTML I'm using but can be changed <div class="imageHolder"> <div class="first SlideImage"> <img src="..." alt="..."/> </div> <div class="second SlideImage"> <img src="..." alt="..."/> </div> <div class="third SlideImage"> <img src="..." alt="..."/> </div> </div> And the CSS .imageHandler{ float:left; width:764px; height:70px; margin:1px 0px 0px; } .imageHolder .SlideImage{ float:left; position:relative; overflow:hidden; } .imageHolder .SlideImage img{ position:absolute; } .imageHolder .first.SlideImage{ width:381px; height:339px; margin-right:1px; } .imageHolder .second.SlideImage{margin-bottom:1px;} .imageHolder .second.SlideImage, .imageHolder .third.SlideImage { width: 382px; height: 169px; } Ask me anything if this doesn't make sense, thanks in advance

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  • How to access a (shadowed) global function in ruby.

    - by yngvedh
    Hi, I was wondering how to access a global function fn in ruby from a class which also defined a method fn. I have made a workaround by aliasing the function like so: def fn end class Bar alias global_fn fn def fn # how to access the global fn here without the alias global_fn end end I'm looking for something along the lines of c++'s :: to access global scope but I can't seem to locate any information about it. I guess I don't know specifically what I'm looking for.

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  • In the Enterprise Library, how does the abstract Validator.cs have a method definition?

    - by Soham
    Consider this piece of code: public abstract class Validator { protected Validator() { } protected abstract void ValidateCore(object instance, string value, IList<ValidationResult> results); public void Validate(object instance, string value, IList<ValidationResult> results) { if (null == instance) throw new ArgumentNullException("instance"); if (null == results) throw new ArgumentNullException("results"); ValidateCore(instance, value, results); } } Look at the Validate() overload, how can an abstract class have definitions like this?

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  • Aside from a prototype, what is the next best thing to satisfy a user

    - by user1639998
    Aside from a prototype, what is the next best thing to satisfy a user who really wants to know what an application will be like? Choice 1 A process model Choice 2 An interaction diagram Choice 3 A data-flow diagram Choice 4 A class diagram Choice 5 A class-state diagram 2 is my partner's choice 3 is my choice I stick to my colors also he stick to his. which one is better?

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  • Subclassing Cocoa means no subclass ivars in some cases?

    - by Michael
    The question is generally coming from self = [super init]. In case if I'm subclassing NSSomething and in my init's method self = [super init] returns object of different class, does it mean I am not able to have my very own ivars in my subclass, just because self will be pointing to different class? Appreciate if you could bring some examples if my statement is wrong.

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