Save multiple attributes to same core data entity

Question

I am first time user of core data and trying to learn the core data.

For start with employee example with two attributes. 1. name 2. salary

Now I done all necessary things needed for loading the data from DB. I get the values i saved before.

But problem is i am able to save only one attribute of the Employee table.For first time i saved only name of employee. Then when i got success in that, i try to save the name with salary then i got [NSManagedObject setSalary:]: unrecognized selector sent to instance 0x7472d80 exception.

Here is my code.

   - (IBAction)setBtnTouched:(id)sender {


     Employee *newEmp = [NSEntityDescription
                insertNewObjectForEntityForName:@"Employee"
                inManagedObjectContext:context];

    [newEmp setName:self.textFieldName.text];

    [emp addObject:newEmp];

/* this is the code that i added after success in saving for employee name.*/
    //[newEmp setSalary:self.textFieldSal.text];
    //[emp addObject:newEmp];
*/
     BOOL isSaved = [context save:nil];
  NSLog(@"is saved %d",isSaved);

NSLog(@"emp :%@",emp);

}

I dont understand where i went wrong because both are attributes of same entity.

Please do write to this thread.

Edited: screen shot enter image description here Regards, paggyyy123

If the name of the attribute is "sal" (as in the screenshot) then you should call [newEmp setSal:...] and not [newEmp setSalary:...]. — Martin R
you mean the name of attribute and the variable name of the class that are holding these values must me same. Because i have the "Employee" class with varialbels " name" and "salary" . — user968597
@user968597: Yes, they must be identical. Note Xcode has a menu item "Editor -> Create NSManagedObject subclasses ..." to create the class files Employee.h/Employee.m, that is much less error-prone! — Martin R

Mundi Mundi · Accepted Answer · 2013-04-19T09:10:21

Make sure your NSManagedObject subclass contains the correct attribute name accessor.

// Employee.m
@dynamic Salary

Also, note that you are adding the new employee to your array emp twice. These two will be identical once the attributes are complete.

Save multiple attributes to same core data entity

1 Answers