Apple

Am 12.07.2012 um 20:46 schrieb Hugo Cambero:

Hi Everybody

My name is Hugo, I'm from Mexico. I have been developing using WebObjects and Wonder Frameworks, I'm newbie in this topic.

Well, I have a problem, I hope you can help me. I'm developing a test application, I want to learn about EOF.

I have 2 entities, that I created using EOModel. The first entity is: User, the second is Role. The relationship between the entities is: One user
can have many Roles.

Well, I tried to insert a row using the next code:

                    EOEditingContext ec = ERXEC.newEditingContext();
                    Role userRole = Role.fetchRole( ec, Role.NAME.eq("user") ); //Get the correct Role to the new user

                    User newUser = new User();

don't create EOs that way, use

ERXEOControlUtilities.createAndInsertObject(ec, User.class);

                    newUser.setName( name.toLowerCase() );
                    newUser.setPaternalName( paternalName.toLowerCase() );
                    newUser.setMaternalName( maternalName.toLowerCase() );
                    newUser.setBirthday( new NSTimestamp() );
                    newUser.setUsername( username );
                    newUser.setPassword( password );

                    newUser.setRole( userRole );                   //Set the role to the user

you said that User <-->> Role but setRole() would point to a to-one relationship. A to-many relationship should give you

user.addToRoles(role);

user.removeFromRoles(role);

so there seems to be a problem with your model or with your java classes.

                    ec.insertObject( newUser );                    //Insert object to the EOEditingContext
                    ec.saveChanges();                                //Commit to the DataBase

But, the server has the next error:

java.lang.RuntimeException: You crossed editing context boundaries attempting to set the 'role' relationship of <your.app.model.User pk:"null"> (which is not in an editing context) to <your.app.model.Role pk:"2"> (in EC er.extensions.eof.ERXEC@762a5241).

I understand that the primary key of the user is null, because it's a new user and I want to insert it to the data base.

What is the correct way to insert row, when it have a relationship between the entities?

Thanks for you time

References:
	>Problem EOEditingContext (From: Hugo Cambero <email@hidden>)
	>Re: Problem EOEditingContext (From: Johann Werner <email@hidden>)