gorm-belongs-to

Model a one-to-one ownership relationship in GORM by declaring a foreign key on the child model and using the belongs-to association to reference the parent. Use foreignKey and references tags to configure the mapping and support eager loading.

The belongs-to association pattern in GORM establishes clear one-to-one ownership by allowing a child model to reference a single parent entity. It is typically applied to relationships like a User belonging to a Company or an Employee having a Manager.

Customize the foreign key and references fields for a GORM belongs-to relationship by applying the foreignKey and references struct tags. These tags explicitly map the child model's foreign key column to the specific referenced field on the parent model.

GORM supports eager loading for belongs-to one-to-one associations using Preload or Joins. This efficiently loads the related parent model alongside the child model, preventing N+1 query issues when retrieving ownership data.

Use a belongs-to association in GORM when the foreign key resides on the declaring child model that references a parent. This approach establishes clear ownership from the child's perspective, whereas has-one places the foreign key on the referenced model.

You can apply database constraints when configuring a belongs-to relationship in GORM by using the constraint tag. This ensures referential integrity is enforced at the database level for your one-to-one ownership models.