z-song/laravel-admin · error · Exception

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

Error message

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

What it means

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

Source

Thrown at src/Grid/Displayers/BelongsToMany.php:42

    protected function getOtherKey()
    {
        if (isset(static::$otherKey[$this->getName()])) {
            return static::$otherKey[$this->getName()];
        }

        $model = $this->getGrid()->model()->getOriginalModel();

        if (is_callable([$model, $this->getName()]) &&
            ($relation = $model->{$this->getName()}()) instanceof Relation
        ) {
            /* @var Relation $relation */
            $fullKey = $relation->getQualifiedRelatedPivotKeyName();
            $fullKeyArray = explode('.', $fullKey);

            return static::$otherKey[$this->getName()] = end($fullKeyArray);
        }

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

    /**
     * @throws \Exception
     *
     * @return false|string|void
     */
    protected function getOriginalData()
    {
        $relations = $this->getColumn()->getOriginal();

        if (is_string($relations)) {
            $data = explode(',', $relations);
        }

        if (!is_array($relations)) {
            return;
        }

View on GitHub (pinned to 67c441eb78)

When it happens

Trigger: Thrown at src/Grid/Displayers/BelongsToMany.php:42 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/5a229aadb7dfd322. Report an issue: GitHub.