Update to-many relation bug

[heyiammushu]

Trying to update relations of workers resource

PATCH /api/v1/workers/1
...
'type' => 'workers',
'id' => "1",
'attributes' => [...],
'relationships' => [
    'skills' => [
        'data' => [
            'type' => 'skills',
            'id' => '4',
        ]
    ]
]
...

And getting the response

"errors": [
      {
          "detail": "The field skills must be a to-many relation.",
          "source": {
              "pointer": "/data/relationships/skills"
          },
          "status": "400",
          "title": "Non-Compliant JSON:API Document"
      }
  ],

Workers schema

return [
     ...
      BelongsToMany::make('skills'),
      ...
  ];

Workers resource

public function relationships($request): iterable
    {
        return [
            ...
            $this->relation('skills'),
            ...
        ];
    }

Workers request

public function rules(): array
    {
        return [
            'skills' => JsonApiRule::toMany(),
            ...
        ];
    }

Workers model

...
public function skills()
    {
        return $this->belongsToMany(Skill::class)->withTimestamps();
    }
...

[lindyhopchris]

The error message is correct. Your payload should be this if the relationship is to-many:

PATCH /api/v1/workers/1
...
'type' => 'workers',
'id' => "1",
'attributes' => [...],
'relationships' => [
    'skills' => [
        'data' => [
            [
                'type' => 'skills',
                'id' => '4',
            ]
        ]
    ]
]
...