doucha5080 2014-11-28 10:56
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I have something strange happening which I can't understand and wondered if anyone could help me work out what's going on.

I have 2 tables (assessors, processes) and a pivot (process_assessor). I am trying to update the pivot with an assessor's processes so I have a form which when submitted is passed to this method...

public function updateProcesses( $id )
    $assessor = $this->model->find( $id );
    return $assessor->processes()->sync( $this->request->get( 'process_id' ) );

This works fine however when updating a user to have no processes I get an error message...

Argument 1 passed to Illuminate\Database\Eloquent\Relations\BelongsToMany::formatSyncList() must be of the type array, null given, called

However, (and this is the weird bit) I also have a user profile module which uses exactly the same way to 'sync' with the pivot table however when I submit that form with all options for that particular module unchecked then it works, the user is detached from them in the pivot.

What am I doing wrong? Any ideas?

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  • douzhuanqian8244 2014-11-28 11:29

    Simply cast to an array:

    return $assessor->processes()->sync( (array) $this->request->get('process_id') );

    Alternatively you can use empty array as a default value for get():

    return $assessor->processes()->sync( $this->request->get('process_id', []) );

    however 1st option is more reliable.

    本回答被题主选为最佳回答 , 对您是否有帮助呢?



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