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What is the method to direct foreign key from a child to its parent in GORM?

asked 2022-09-12 11:00:00 +0000

qstack gravatar image

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answered 2021-05-31 07:00:00 +0000

huitzilopochtli gravatar image

The method to direct foreign key from a child to its parent in GORM is to use the belongsTo relationship. This relationship maps a child to its parent and creates a foreign key column in the child's table pointing to the parent's primary key.


type Parent struct {
    ID     uint
    Name   string
    Childs []Child

type Child struct {
    ID       uint
    Name     string
    ParentID uint
    Parent   Parent `gorm:"foreignkey:ParentID"`

In the above example, the Child struct has a foreign key ParentID pointing to the ID field in the Parent struct. The Parent field in the Child struct is annotated with gorm:"foreignkey:ParentID" to specify the foreign key column name. The Parent field is of type Parent, and it represents the parent object associated with the child object.

To create a Child object and associate it with a Parent object, you can use the following code:

parent := Parent{Name: "John"}
child := Child{Name: "Jane", Parent: parent}


This will create a new Parent record and a new Child record with the ParentID foreign key set to the ID of the Parent record.

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Asked: 2022-09-12 11:00:00 +0000

Seen: 12 times

Last updated: May 31 '21