AssemblyConstraints Object Preview

Derived from: Base Object
Defined in namespace "adsk::fusion" and the header file is <Fusion/Components/AssemblyConstraints.h>

PreviewThis functionality is provided as a preview of intended future API capabilities. You are encouraged to use it and report any problems or suggestions using the Fusion API and Scripts forum.

Because this is a preview of future functionality, there is the possibility that it will change, which will possibly break any existing programs that use this functionality. Because of that, you should never deliver any programs that use any preview capabilities. For a distributed program, you should wait until it has moved from preview to released state.

Description

The collection of assembly constraints in this component. This provides access to all existing assembly constraints and supports the ability to create new assembly constraints.

Methods

Name Description
add Creates a new assembly constraint.
classType Static function that all classes support that returns the type of the class as a string. The returned string matches the string returned by the objectType property. For example if you have a reference to an object and you want to check if it's a SketchLine you can use myObject.objectType == fusion.SketchLine.classType().
createInput Creates an assembly constraint input to define an assembly constraint. Use functionality on the returned AssemblyConstraintInput to define the input needed to create an assembly constraint.
item Function that returns the specified assembly constraint using an index into the collection.
itemByName Function that returns the specified assembly constraint object using a name.

Properties

Name Description
count Returns the number of assembly constraint objects in the collection.
isValid Indicates if this object is still valid, i.e. hasn't been deleted or some other action done to invalidate the reference.
objectType This property is supported by all objects in the API and returns a string that contains the full name (namespace::objecttype) describing the type of the object.

It's often useful to use this in combination with the classType method to see if an object is a certain type. For example: if obj.objectType == adsk.core.Point3D.classType():

Accessed From

Component.assemblyConstraints, FlatPatternComponent.assemblyConstraints

Version

Introduced in version July 2025