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  3. Backend relations: Many to many relationship not working - "Model does not contain a definition for user_id"
programmieraffe
programmieraffe

Hey everybody,

I just started to use octobercms a couple of days ago. For a plugin I want to create a relationship between projects and users from rainlab frontend user plugin. Right now I can't get a simple many-to-many relationship between the two simple models to work (I did not use rainlab user plugin by now):

 Model:project <-- belongs to many --> Model:user

The whole plugin setup was done with the new Builder plugin. I also added " 'Backend\Behaviors\RelationController'" and 'config_relation.yaml'; for the Projects controller. (Found this in the docs)

If I click on the record finder in the backend (Create Project), there is the following error message:

"Model 'StudyDigital\Demorelationuser\Models\Project' does not contain a definition for 'user_id'." on line 508 of /Users/admin/webserver/octobercms/modules/backend/Classes/Controller.php

Plugin source code: https://github.com/programmieraffe/octobercms-many-to-many-relation

Help much appreciated - thanks in advance! :-)

I used this tutorial: https://vimeo.com/123489421

Best regards, Matthias

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