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Re: Remove a EOEnterpriseObject from an editing context
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Re: Remove a EOEnterpriseObject from an editing context


  • Subject: Re: Remove a EOEnterpriseObject from an editing context
  • From: Ken Anderson <email@hidden>
  • Date: Mon, 24 Jul 2006 13:24:45 -0400

Edgar,

There are probably a lot better approaches than trying to create EOs and then move them to another context. As I understand it, you're importing a large file that has cross references. I have a few questions:

Are you waiting to complete a single EO, or are you waiting to hook multiple EOs together in a relationship?

If you're waiting to complete a single EO and need data from multiple parts of the file, is it possible to split up the EO into multiple EOs?

If you're waiting to connect multiple EOs together in a relationship, is there a reason you can't save the first part?

How much memory are you allocating to the VM?

How large is your file, and how many objects do you expect to instantiate from each?

Ken

On Jul 24, 2006, at 1:16 PM, Edgar Ra. Klein wrote:

Hi Ken,

On 24.07.2006, at 19:06, Ken Anderson wrote:

Edgar,

Is there a reason you're not doing it all in one editing context?

Because of the OutOfMemoryException!

Ed


Ken

On Jul 24, 2006, at 12:55 PM, Edgar Ra. Klein wrote:

Hi Ken,

On 24.07.2006, at 14:37, Ken Anderson wrote:

Edgar,

If you do ec.deleteObject(obj) and it has never been saved, it will just be removed.

Care to share why you want to process this way?

Ken

I have to import quite some data items from a file. Some of them reference to others which are still not in the database. My approach is that I work with ec1 and if I collect a data item for which there is still no reference in the data base, I move it to ec2. This ec2 will be saved after all the other data has been set.


I hope my explanations are not too confusing ;-)

Ed

On Jul 24, 2006, at 7:43 AM, Edgar Ra. Klein wrote:

Hi,

I'm writing an application to import data from files and have a problem inserting an EOEnterpriseObject from an unsaved editing context into another one. More precisely, I have an EOEnterpriseObject inserted into an editing context ec1. After some processing this object isn't complete to be saved, hence I wanted to remove it from ec1, insert it into another editing context ec2, and try to update the reference later.

I already tried to remove the object from ec1 by using the following code:
- ec1.forgetObject(eoObject); (I know, I should not invoke this method, but this approach doesn't work anyway)
The problem here is that there is still a null object in the editing context ec1.


Is there a possibility to unregister a newly generated object (not saved in the database) from its current editing context (this editing context should be empty, if this object was the only object) and to insert it into another one?

Thanx,
Edgar
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  • Follow-Ups:
    • Re: Remove a EOEnterpriseObject from an editing context
      • From: "Edgar Ra. Klein" <email@hidden>
References: 
 >Remove a EOEnterpriseObject from an editing context (From: "Edgar Ra. Klein" <email@hidden>)
 >Re: Remove a EOEnterpriseObject from an editing context (From: Ken Anderson <email@hidden>)

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