SQLSTATE [HY000]：常规错误：1364字段“ reservation_id”没有默认值

Question

I can't get through in my code. I have error indicating that ' reservation_id ' doesn't have a default value. This reservation_id of table reservation_participate_details is a foreign key from the parent table reservation 's id column. I wonder if there is something to do with the hasMany or belongsTo thing. I am not yet familiar deeply on laravel.

The reservation table should/has many rows in the reservation_participate_details . The process is working before but when I changed a column (reservation_participate_id) of reservation_participate_details into reservation_id and point it as a foreign key of reservation 's column id , it is now not working.

I have tried to put

    public function participateDetail()
    {
        return $this->hasMany('App\ReservationParticipateDetail');
    }

into the reservation (parent) table and

    public function reservation()
    {
        return $this->belongsTo('\App\Reservation');
    }

into the reservation_participate_detail table

I just need to save participate details into reservation_participate_details . Again, reservation table has many reservation_participate_details .

Answer 1

Since you have changed the names of foreign key columns (not followed laravel default convention), you need to define those column names in relationship functions.

reservation model

public function participateDetail()
{
    return $this->hasMany('App\ReservationParticipateDetail', 'reservation_id', 'id');
}

reservation participate details model

public function reservation()
{
    return $this->belongsTo('\App\Reservation', 'reservation_id', 'id');
}