ifcopenshell: assign object

O by olbu on 8 Aug 2024, edited 13 Aug 2024 #

Hello.

I am trying to assign various elements to an element assembly. My function call looks like this:

ifcopenshell.api.run("aggregate.assign_object", model, relating_object=Rost, products=elements),

where Rost is an instance of IfcElementAssembly and elements is a list of the elements i would like to bundle into the assembly.

It yields the following error: TypeError: Usecase.init() got an unexpected keyword argument 'products'

First, I am a bit confused as in the source code the argument products is included:

def assign_object(

file: ifcopenshell.file,

products: list[ifcopenshell.entity_instance],

relating_object: ifcopenshell.entity_instance,

)

Can anyone help me spot the mistake?

Second, while I'm at it, I'm also a bit confused as to what the correct usage of the API is. I've seen the syntax used above with api.run("aggregate.assign_object", ...) as well as api.aggregate.assign_object(...). Considering the source code, the latter seems correct to me but I always get a "module is not callable" error.

What is the correct way to use the API?

Thanks in advance

S by steverugi on 9 Aug 2024, edited 9 Aug 2024 #

not sure if this helps but you can call api functions without run

please check the relelevant updated page

however, I tested the function and it's working (I have two walls in the basic model)


import ifcopenshell

from ifcopenshell.api import aggregate

from blenderbim import tool

model = tool.Ifc.get()

walllst = model.by_type("IfcWall")

wall1 = walllst[0]

wall2 = walllst[1]

aggregate.assign_object(model, products = [wall1], relating_object = wall2)

I used wall1.Decomposes and wall2.IsDecomposedBy to check the aggregation and it's ok

PS it's the first time I use this module.. ;)

T by theoryshaw on 9 Aug 2024 # +1 votes

O by olbu on 13 Aug 2024 #

thank you!