Re: Nested Editing Contexts
Re: Nested Editing Contexts
- Subject: Re: Nested Editing Contexts
- From: Ken Anderson <email@hidden>
- Date: Fri, 6 Apr 2007 10:45:32 -0400
Kevin,
I'm having a little difficulty with your nomenclature and
prepositions :) , but in general, what you're saying is correct.
Just remember, when you perform a saveChanges() on the child EC, the
changes will only be committed to the parent EC. To get your changes
to the DB, that EC has to have saveChanges() called also.
Ken
On Apr 5, 2007, at 4:42 PM, Kevin Windham wrote:
I am trying to work out how to use a nested editing context in my app.
I have an object that has a relationship to another object that it
owns. I am currently directing the user to another page to edit the
owned object, and need to implement a nested context to make save
and cancel work properly.
My understanding of how this should work is extremely basic at this
point. Here is what I think I need to do when the user decides to
edit the owned object:
create a new editing context with the default context as its parent
lock the new ec
Add my owned object into the new child context
set my child page's object variable to the owned object which is in
the child ec
return the child's page to the user
the user now either saves or cancels
call saveChanges or revertChanges based on the user's action
unlock the child ec
dispose the child ec
return the parent page
Am I going wrong here right off the bat, or is this basically correct.
Thanks,
Kevin
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