NSEntityDescription works fine but Analyzer says value never read

Question

I'm puzzled by a remark from Xcode' analyzer. I've searched Stack about it but didn't really find a similar situation. I have a CoreData/SQLite app where the user select a record in a table, gets all the atributes for the entity. then, based on conditions, will do things.

"ordersController" is the NSArrayController for the data. "Order" is the involved entity. "objectAtIndex:0" is the selected record in the table.

Here is the code:

NSArray* selectedObjects = [ordersController selectedObjects];
NSEntityDescription *entityOrder = [NSEntityDescription entityForName:@"Order" inManagedObjectContext:managedObjectContext];
entityOrder = [selectedObjects objectAtIndex:0];
if ([entityOrder valueForKey: bla_bla_bla... { do_something }

The app compiles fine, no crash, no warning and correctly handles the data as intended. However when I start the Analyze tool of Xcode, it points at this line, saying "Value stored to 'entityOrder' during its initialization is never read."

NSEntityDescription *entityOrder = [NSEntityDescription entityForName:@"Order" inManagedObjectContext:managedObjectContext];

How can it be not read when it is actually manipulated and the variable is correctly modified by the app? How should I improve my code? Thansk for your help.

Answer 1

Immediately after the line

NSEntityDescription *entityOrder = [NSEntityDescription entityForName:@"Order" inManagedObjectContext:managedObjectContext];

you then reassign it to the contents of first object of selectedObjects with

entityOrder = [selectedObjects objectAtIndex:0];

The Xcode analyzer is letting you know that the first assignment is superfluous, or you are assigning the results of [selectedObjects objectAtIndex:0] to the wrong variable in your code.