Partial MonoBehaviour script can not be attached to a GameObject when another one exists with the same file and class name

Unity: Scripting

As Designed

2023.1.X

2022.2.X

2022.2.0a5 onwards

This is by design. The workarround is having the partial classes having different filenames. While the partial class you want to use have the same filename as the class name. So only the class that matches the filename is useable.

How to reproduce:
1. Open the attached project (Part.zip)
2. In the Project panel navigate to the "Scripts" folder
3. Drag the "Part" script onto any GameObject in the Hierarchy

Expected result: The script is added to the GameObject
Actual result: The editor opens a "Can't add script" window informing that the script could not be attached

Reproducible with: 2022.2.0a5, 2022.2.0b11, 2023.1.0a14
Not reproducible with: 2020.3.40f1, 2021.3.12f1, 2022.1.19f1, 2022.2.0a4

Reproducible on: Windows 10, Ubuntu 20.04

Note: The script being attached has to have a partial class and another script with the same file and class name in another folder

Partial MonoBehaviour script can not be attached to a GameObject when another one exists with the same file and class name

Unity: Scripting

As Designed

Prioritise and Follow this issue

Have a workaround or additional info about this issue?

Partial MonoBehaviour script can not be attached to a GameObject when another one exists with the same file and class name

Unity: Scripting

Statuses

As Designed

Resolution Notes

2023.1.XAs DesignedThis is by design. The workarround is having the partial classes having different filenames. While the partial class you want to use have the same filename as the class name. So only the class that matches the filename is useable.

Description

Prioritise and Follow this issue

Have a workaround or additional info about this issue?