Re: "Saving" changes to an object's variable(s) but not save changes to database.

Hi Tony,

If i understand you correctly, an easy way to do what you want is to
create a new EOEditingContext and fetch your objects into it.

Then let the user enter the form data and submit it (which
automatically sets the values in the EOEnterpriseObjects without saving
to the database).

In the action method that is bound to your form submit button,
initialise the next page and pass the array of EO's you have already
fetched.

As long as you don't call saveChanges() on your new editing context,
the changes will not be committed to the database. Also, the editing
context and its objects will get garbage collected automatically when
the pages it is referenced from is removed the session page cache.

The only thing you have to worry about is locking your editing context
correctly as to avoid a deadlock. I recommend you use the
MultiECLockManager from http://sourceforge.net/projects/gvcsitemaker/

regards

Peter

Tony Hoffman wrote:

I have what may be such a profoundly stupid question that
it may need to be ignored by all. I've gone through my books and the
list and Google searches and I still can't find anything that gets me
even close to the answer (also usually a big tip off that my
question/and or thinking is deeply misguided).

My problem is basically this: I want users of my web application to be
able to make form input changes into the variable value of each
instance of an object generated from an EOFetchspecification. And then
I want to be able to save these values in the session so that I can
move it between components, refer to it, and then have it disappear at
the end of the session without ever bothering the database again. If I
were to use the saveChanges method on the editingcontext for this
NSMutableArray of objects and its input variables, everything works
fine, but I don't want to save changes to the database, I want to save
changes to the (temporary) values in the variable in the objects held
in the session.

I have the WOTextFields just sitting there. All I want to do is link
them up with some kind of action method that will record the user input
into the object variables in the session WITHOUT saving those changes
to the database. It seems so basic that I have to ask, what am I
missing?

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