Written by jesterKing the 29 Aug 10 at 08:13.

Make following possible by allowing PointerProperty to be added as property to custom type.

class MyType(bpy.types.IDPropertyGroup):
pass

MyType.object = PointerProperty(name='Object', type=bpy.types.Object)

mytypeinstance.object = bpy.data.objects[0]

In case a datablock gets deleted (pointer invalid) I propose to have lazy evaluation:
when the code accesses the PointerProperty either throw an exception or None, whichever is preferrable. This means there is no need to traverse IDs when changes happen to update the pointers.

Currently I lean towards None.

if mytypeinstance.object: # here underlying code can check and return None when pointer is invalid
[codebloc]

Make following possible by allowing PointerProperty to be added as property to custom type. class MyType(bpy.types.IDPropertyGroup): pass MyType.object = PointerProperty(name='Object', type=bpy.types.Object) mytypeinstance.object = bpy.data.objects[0] In case a datablock gets deleted (pointer invalid) I propose to have lazy evaluation: when the code accesses the PointerProperty either throw an exception or None, whichever is preferrable. This means there is no need to traverse IDs when changes happen to update the pointers. Currently I lean towards None. if mytypeinstance.object: # here underlying code can check and return None when pointer is invalid [codebloc]