type Group struct {
gorm.Model
CreatedBy uint64
GroupOrders []GroupOrder gorm:"many2many:group_orders;association_jointable_foreignkey:group_id;jointable_foreignkey:group_id;"
}
type GroupOrder struct {
gorm.Model
GroupID uint64
OrderID uint64
UserID uint64
Group Group
}
I am trying to insert a record like this
newGroup: = &Group{
CreatedBy: newGroupDetails.UserID,
GroupOrders: []GroupOrder{
{
OrderID: newGroupDetails.OrderID,
UserID: newGroupDetails.UserID,
},
},
}
I am creating a record by using this.
db.Create(newGroup)
It creates a record correctly in Group model but while inserting in GroupOrder model, it is inserting NULL value in group_id column.
After that, it fires a query
INSERT INTO group_orders (group_id) SELECT ? FROM DUAL WHERE NOT EXISTS (SELECT * FROM group_orders WHERE group_id = ?)[30 30] 1 pkg=mysql
And then insert another record in GroupOrder Model with all empty fields but adding the group id field as the previously inserted group_order_id value.
The resultant data in mysql
GroupOrder
| id | group_id | order_id | user_id |
+----+---------------+----------+---------+
| 30 | 0 | 8764822 | 678972 |
| 31 | 30 | NULL | NULL |
Group
| id | created_by |
+----+------------+
| 18 | 678972 |
At least, it should be inserting 18 in place of 30 in the last row group_id column in GroupOrder table.
Why is this happening? Can someone explain if there's a bug.
PS: For brevity, removed a few other columns from both Models.
