Changeset 208

Timestamp:

01/21/07 00:48:47 (2 years ago)

Author:

rentzsch

Message:

[NEW] mogenerator: Add position_ support to machine accessor.

Files:

• trunk/cocoa/mogenerator/machine.m.motemplate (modified) (1 diff)

trunk/cocoa/mogenerator/machine.m.motemplate

@@ -12 +12 @@
-        <$Attribute.attributeValueClassName$> *result = [self primitiveValueForKey:@"<$Attribute.name$>"];
-        [self didAccessValueForKey:@"<$Attribute.name$>"];
+<$if Attribute.name == position_$>
+        //      position_ is a calculated value: @max(position_)+1. Calculate it the first time it's used.
+        if (!result || [result longLongValue] == -1) {
+                NSFetchRequest *fetchObjectWithMaximumPosition = [[[NSFetchRequest alloc] init] autorelease];
+                [fetchObjectWithMaximumPosition setEntity:[self entity]];
+                [fetchObjectWithMaximumPosition setSortDescriptors:[NSArray arrayWithObject:[[[NSSortDescriptor alloc] initWithKey:@"position_" ascending:NO] autorelease]]];
+                [fetchObjectWithMaximumPosition setFetchLimit:1];
+                NSArray *objectWithMaximumPosition = [[self managedObjectContext] executeFetchRequest:fetchObjectWithMaximumPosition error:nil];
+                assert(objectWithMaximumPosition && [objectWithMaximumPosition count] < 2);
+                result = [NSNumber numberWithLongLong:[objectWithMaximumPosition count] ? [[[objectWithMaximumPosition lastObject] valueForKey:@"position_"] longLongValue]+1 : 0];
+                [self setPosition_:result];
+        }
+<$endif$>
-        return result;
-}