How to combine two bodies in Fusion API?

[Anonymous]

I need to combine two Brep bodies but each time I try, the CombineFeatures.add Method returns Null.

I get the message: "NoneType object has no attribute 'targetBody'

The code is below: 

app = adsk.core.Application.get()

product = app.activeProduct

design = adsk.fusion.Design.cast(product)

model = design.activeComponent

features = model.features

combineFeatures = features.combineFeatures

bodies = model.bRepBodies

body = bodies.item(0)

copyOfBody = body.copyToComponent(model)

bodyCollection = adsk.core.ObjectCollection.create()

bodyCollection.add(copyOfBody)

combineFeatureInput = combineFeatures.createInput(body, bodyCollection)

combineFeatureInput.operation = 0

combineFeatureInput.isKeepToolBodies = False

combineFeatureInput.isNewComponent = False

returnValue = combineFeatures.add(combineFeatureInput)

body = returnValue.targetBody

[kandennti]

Hi.jmperez6

I think that you can process it properly with your code.

(Win7 + Fusion360ver 2.0.4233)

[Anonymous]

So there's something wrong with my code?
Also, how did you get that list of object types?

[kandennti]

As I indicated in the image, I just executed your code.
I do not think there is any particular problem within this code range.

[Anonymous]

Ok, well now after running it again, I'm getting this error: "didn't roll edit feature back".
It says it occurs in the returnValue.targetbody line.
What would this mean?

[kandennti]

In my environment, Can't reproduce the error.

[BrianEkins]

The reason for the failure is that the targetBody property returns the original body that was used as input to the feature.  The problem is that after the feature is created that body no longer exists in its original state.  To get it, you need to roll the model back to just before the feature was created.  This is the same thing that happens in the UI when you edit a feature.  You'll see that the timeline rolls back to just before that feature so you see the model in the state it was when the feature was created.  The code below will allow you to do that.

returnValue.timelineObject.rollTo(True)       
body = returnValue.targetBody

[martin.j.labrousse]

Hello

on my side, it works by changing the lost last lines : 

returnValue = combineFeatures.add(combineFeatureInput)

body = returnValue.targetBody

and keep only

combineFeatures.add(combineFeatureInput)