z-song/laravel-admin · error · Exception

Column of this field must be a `BelongsToMany` or `HasMany`

Error message

Column of this field must be a `BelongsToMany` or `HasMany` relation.

What it means

Error "Column of this field must be a `BelongsToMany` or `HasMany` relation." thrown in z-song/laravel-admin.

Source

Thrown at src/Form/Field/MultipleSelect.php:47

            return $this->otherKey;
        }

        if (is_callable([$this->form->model(), $this->column])) {
            $relation = $this->form->model()->{$this->column}();

            if ($relation instanceof BelongsToMany) {
                /* @var BelongsToMany $relation */
                $fullKey = $relation->getQualifiedRelatedPivotKeyName();
                $fullKeyArray = explode('.', $fullKey);

                return $this->otherKey = 'pivot.'.end($fullKeyArray);
            } elseif ($relation instanceof HasManyRelation) {
                /* @var HasManyRelation $relation */
                return $this->otherKey = $relation->getRelated()->getKeyName();
            }
        }

        throw new \Exception('Column of this field must be a `BelongsToMany` or `HasMany` relation.');
    }

    /**
     * {@inheritdoc}
     */
    public function fill($data)
    {
        if ($this->form && $this->form->shouldSnakeAttributes()) {
            $key = Str::snake($this->column);
        } else {
            $key = $this->column;
        }

        $relations = Arr::get($data, $key);

        if (is_string($relations)) {
            $this->value = explode(',', $relations);
        }

View on GitHub (pinned to 67c441eb78)

When it happens

Trigger: Thrown at src/Form/Field/MultipleSelect.php:47 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of z-song/laravel-admin@67c441eb78 (2026-08-21). Data as JSON: /api/errors/b02a66f26d67b20b. Report an issue: GitHub.