SQLSTATE[23000]：违反完整性约束：1052 列 'created_at' 在 where 子句中不明确

Question

laravel join tabel search.

error: SQLSTATE[23000]: Integrity constraint violation: 1052 Column 'created_at' in where clause is ambiguous (SQL: select tbl_die_management_categories .*, tbl_die_management_subcategories . id as t2 , tbl_die_management_subcategories . die_weight from tbl_die_management_categories inner join tbl_die_management_subcategories on tbl_die_management_categories . id = tbl_die_management_subcategories . die_categories_id where created_at like %2022-11-17%)

 public function diemanagement(Request $request)
    {
        $DieManagementCategories = DB::table('tbl_die_management_categories');
        if($request->keyword != null){
           $DieManagementCategories = $DieManagementCategories->where('created_at','like','%'.$request->keyword.'%');
        }
        $DieManagementCategories = $DieManagementCategories->select('tbl_die_management_categories.*','tbl_die_management_subcategories.id as t2','tbl_die_management_subcategories.die_weight')
        ->join('tbl_die_management_subcategories','tbl_die_management_categories.id','=','tbl_die_management_subcategories.die_categories_id')
        ->get();
        // dd(json_encode($DieManagementCategories));
        $DieManagementCategories = DieManagementCategories::with('subcategories')->get();
  
        return view('admin.diemanagement.diemanagement',['DieManagementCategories'=>$DieManagementCategories]);
        
    }

Answer 1

you have two tables to select from in your query

tbl_die_management_categories, tbl_die_management_subcategories

both with created_at column... in your where clause you should specify on what created_at column the condition will be applied.... just set the table name before column name to do that:

 if($request->keyword != null){
           $DieManagementCategories = $DieManagementCategories->where('tbl_die_management_categories.created_at','like','%'.$request->keyword.'%');
        }