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Re: Filtered to many relationship
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Re: Filtered to many relationship


  • Subject: Re: Filtered to many relationship
  • From: Don Lindsay <email@hidden>
  • Date: Fri, 2 May 2008 01:48:57 -0400

For one application I wrote I extended the WOToOneRelationship and WOToManyRelationship components and added a qualifier binding. I can try and find the code that I used. It was convenient because you could type it right in the binding for the relationship component.

Don
On May 2, 2008, at 12:10 AM, Chuck Hill wrote:


On May 1, 2008, at 7:31 PM, Steve Peery wrote:

I am trying to set up a to many relationship in Entity Modeler that filters
the destination objects based on a variable in the destination object.


For example, in my School object I have an array of Student objects some
have a variable that defines them as fulltime. Now in my School object I
want to create a to many relationship that just contains the Student objects
that are fulltime. How is this done?


It is not. At least not without some rather clever work in your EO class. The "normal" way to do this is to add a method to your EO class, something like this:

public NSArray fulltimeStudents() {
return EOQualifier. filteredArrayWithQualifier(students(), <your full-time student qualifier here>);
}



Chuck


--

Practical WebObjects - for developers who want to increase their overall knowledge of WebObjects or who are trying to solve specific problems.
http://www.global-village.net/products/practical_webobjects






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References: 
 >Filtered to many relationship (From: Steve Peery <email@hidden>)
 >Re: Filtered to many relationship (From: Chuck Hill <email@hidden>)

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