“生成器无法转换为字符串”删除查询时出错 Laravel 5.8

Question

When the delete sql query rubs it gets the error "Builder could not be converted to string". How can I solve this?

my code:

 public function deleteService(Request $request) { $id = $request->get('delete'); $service = $request->get('service'); $service_id = DB::table('services_info')->select('id')->where('service', '=', $service); DB::delete("DELETE FROM job_service WHERE job_id = {$id} AND service_id = {$service_id}"); }

Answer 1

// you are returning a Builder, no a result
$service_id = DB::table('services_info')->select('id')->where('service', '=', $service);
// add ->value('id')
$service_id = DB::table('services_info')->select('id')->where('service', '=', $service)->value('id');

->value(<column name>) return the first value of <column name> in the query.

In alternative you can fetch the first result of query and then get the value of id: ->first()->id

References: https://laravel.com/docs/7.x/queries