integer 值不正确：laravel 7 中第 1 行的列的“[]”

Question

Hi guys i am trying to store id value from one table to another table column (topic_lookup_masters_id).

so far i have made a join query and trying to get that id..so while storing i am getting error as

General error: 1366 Incorrect integer value: '[]' for column 'topic_lookup_master_id' at row 1 

Here is my store function:

$Topic_id = DB::table('topic_lookup_masters')
    ->join('qtype_lookup_masters', 'qlm_topic_id', '=', 'topic_lookup_masters.tlm_topic_id')
    ->select('topic_lookup_masters.id')
    ->get();

$qtype_lookup_master = new Qtype_lookup_master();
$qtype_lookup_master->topic_lookup_master_id = $Topic_id;

Tried using the type cast as (int) but still its not working.

Answer 1

Probably you try to populate the 'topic_lookup_masters_id' with a string or with null. Check if the associated value is int.