Laravel模型的自定义方法BadMethodCallException - 尝试使用工作台文件夹的供应商文件

当我经常做的那样，将自定义方法添加到模型文件时，我遇到了一个奇怪的错误。从路由文件中，我查询了模型，但得到了"找不到方法"——从错误日志中可以看出，Laravel正在使用工作台文件夹下的供应商文件，即使该工作台包与此代码无关。

Route::get('/test', function () {
    $obj = MyModel::where('id', 1111)->get()->first();
    return $obj->toCustomFormat();
});

[2015-02-03 16:08:08] development.ERROR: exception 'BadMethodCallException' with message 'Call to undefined method Illuminate'Database'Query'Builder::toCustomFormat()' in /var/www/project/workbench/envision/mypackage/vendor/illuminate/database/Illuminate/Database/Query/Builder.php:2117
Stack trace:
#0 [internal function]: Illuminate'Database'Query'Builder->__call('toCustomForm...', Array)
#1 [internal function]: Illuminate'Database'Query'Builder->toCustomFormat()
#2 /var/www/project/workbench/envision/mypackage/vendor/illuminate/database/Illuminate/Database/Eloquent/Builder.php(913): call_user_func_array(Array, Array)
#3 [internal function]: Illuminate'Database'Eloquent'Builder->__call('toCustomForm...', Array)
#4 [internal function]: Illuminate'Database'Eloquent'Builder->toCustomFormat()
#5 /var/www/project/bootstrap/compiled.php(7459): call_user_func_array(Array, Array)
#6 /var/www/project/app/routes.php(12): Illuminate'Database'Eloquent'Model->__call('toCustomForm...', Array)
#7 /var/www/project/app/routes.php(12): MyModel->toCustomFormat()
#8 [internal function]: {closure}()

项目根下的工匠转储没有帮助。你是怎么做到的？

更新：

模型的自定义方法是：

public function toCustomFormat() {
    $this->to       = date(DateTime::ISO8601, strtotime($this->to));
    $this->from     = date(DateTime::ISO8601, strtotime($this->from));
    return $this->toArray();
}