I'm working on a Gin app using Gorm ORM (I'm new to both of them). I've got the following model:
type Record struct {
Barcode string `json:"barcode" gorm:"size:48;unique;not null" sql:"index"`
Name string `json:"name" gorm:"size:160;unique;not null"`
Artist Artist `gorm:"foreignKey:ArtistID""`
ArtistId uint
Category Category `gorm:"foreignKey:CategoryID"`
CategoryId uint
NumOfRecords int `json:"num_of_records" gorm:"not null"`
OriginalReleaseDate time.Time `json:"original_release_date" gorm:"default:null"`
ReissueReleaseDate time.Time `json:"reissue_release_date" gorm:"default:null"`
SideColor string `json:"side_color" gorm:"default:null"`
BarcodeInRecord bool `json:"barcode_in_record" gorm:"default=true"`
gorm.Model
}
As you can see there are two fields with two foreign keys: Artist and Category. Here's those models:
type Category struct {
Name string `json:"name" gorm:"size:60;unique;not null"`
Description string `json:"description" gorm:"size:120"`
Parent uint `json:"parent" gorm:"default:null"`
Active bool `json:"active" gorm:"default:true"`
gorm.Model
}
type Artist struct {
Name string `json:"name" gorm:"size:120;unique;not null"`
Type string `json:"type" gorm:"default:null"`
CountryOfOrigin string `json:"countryOfOrigin" gorm:"default:null"`
gorm.Model
}
category_id
and artist_id
columns are being created but they are not referencing the other tables two tables:
I've tried to define those fields using AssociationForeignKey:Refer
. I also tried to change the foreign key name to simply ID
since that's the name that GORM assigns to primary keys but none of those thinks have worked.
What am I missing?
IMO Gorm docs are pretty lousy. From another SO question ( Gorm Golang orm associations ) it is said that:
it doesn't (create FKs when migrations run). If you want Foreign Key in DB, you need explicitly write something like db.Model(&Place{}).AddForeignKey("town_id", "towns(id)", "RESTRICT", "RESTRICT") during your migrations.
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