Search custom properties in objects on the scene (Python)

Question

Is it possible to somehow search all objects on the scene which have a custom property enabled using prop_search?

I know how to do this with dynamic EnumProperty but it seems to be not an option as it has some bugs.

Answer 1

Since Blender 2.79 this possible by using bpy.props.PointerProperty and its poll parameter.

For example:

# define the filter method
def filter_on_custom_prop(self, object):
    return "MyCustomPropName" in object

# define the property by using the bpy.props.PointerProperty and its poll function
bpy.types.Object.my_object = bpy.props.PointerProperty(
    type=bpy.types.Object,
    poll=filter_on_custom_prop
)

# add to your draw code a `prop_search`
layout.prop_search(obj, "my_object", context.scene, "objects")
# or just simple
layout.prop(obj, "my_object")

Answer 2

After looking at the API, it doesn't appear to be possible.

From the API:

prop_search(data, property, search_data, search_property, text="", text_ctxt="", translate=True, icon='NONE')

• data and property are the same as with a normal property. This may be like bpy.context.scene and "my_prop_name" respectively.

• search_data is the data to search in for the "property"

• search_property is the property to look for in the data

With regards to the last two, it would be, e.g., bpy.data and "objects" respectively.

I think a filtering technique like this would be better suited to the examples that @CoDEmanX shows in this answer:

https://blender.stackexchange.com/a/8712/28015