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Re: Classcastexception _EOCheapMutableArray
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Re: Classcastexception _EOCheapMutableArray


  • Subject: Re: Classcastexception _EOCheapMutableArray
  • From: Lachlan Deck <email@hidden>
  • Date: Sun, 9 Dec 2007 20:44:48 +1100

Hi Don,

On 09/12/2007, at 7:44 PM, Don Lindsay wrote:

Agents is a single row.

Yes, but is the signature of the method referred to by the key 'agent' returning an NSArray or Agent?


i.e., is it:
public NSArray agent() {...} // wrong
or
public Agent agent() {...} // correct

Just to clarify, can you paste in the code from your java component?

mgtOfc is a relationship key.  Even when I do:

sourceObject:  agent
sourceEntityName: "agents"

That's an unusual entity name. i.e., any entity name (normally) starts with an uppercase char (like your Java classes). e.g., "Agent". (the external name for the entity can be lowercase of course and can be a completely different name if need be).


relationshipKey: "mgtOfc"
destinationDisplayKey = "orgs.name"

The listbox does not show on the screen when the screen is rendered in the application.

Sorry for being so dense.

No worries... we'll get there. We just need to clarify exactly what you're doing.


On Dec 8, 2007, at 10:29 PM, Lachlan Deck wrote:

On 09/12/2007, at 12:16 PM, Don Lindsay wrote:

I want to use a WOToManyRelationship control.

I put in the following
datasource:
sourceObject: 		agents
sourceEntityName: 	"Agents"
relationshipkey: 		"mgtOfc"

sourceObject should be bound to a key that returns an EOEnterpriseObject not an array of objects.


is "mgt0fc" a toMany relationship?

When I do this the wo relationship does not even display in the form.

I put in the following
datasource:
sourceObject:		agents.mgtOfc

Again, if "agents" is an array, then agents.mgtOfc is going to return an array containing the results of performing mgt0fc on each agent in agents. If agents is badly named and does indeed return an EOEnterpriseObject (and not one within an array) then agents.mgt0fc looks like it would be an array rather than a single object.


You should have something like:
sourceObject = myAgent;
sourceEntityName = "Agent";
relationshipKey = managedOrgAssociations;
destinationDisplayKey = "organization.name";

Check out the api for WOJExtensions:
developer.apple.com/documentation/WebObjects/Reference/ WOJExtensions/index.html

with regards, --

Lachlan Deck



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  • Follow-Ups:
    • Re: Classcastexception _EOCheapMutableArray
      • From: Don Lindsay <email@hidden>
    • Re: Classcastexception _EOCheapMutableArray
      • From: Don Lindsay <email@hidden>
References: 
 >Classcastexception _EOCheapMutableArray (From: Don Lindsay <email@hidden>)
 >Re: Classcastexception _EOCheapMutableArray (From: Chuck Hill <email@hidden>)
 >Re: Classcastexception _EOCheapMutableArray (From: Don Lindsay <email@hidden>)
 >Re: Classcastexception _EOCheapMutableArray (From: Don Lindsay <email@hidden>)
 >Re: Classcastexception _EOCheapMutableArray (From: Don Lindsay <email@hidden>)
 >Re: Classcastexception _EOCheapMutableArray (From: Lachlan Deck <email@hidden>)
 >Re: Classcastexception _EOCheapMutableArray (From: Don Lindsay <email@hidden>)

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