gorm/multi_primary_keys_test.go

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package gorm_test
import (
"fmt"
"os"
"testing"
)
type Blog struct {
ID uint `gorm:"primary_key"`
Locale string `gorm:"primary_key"`
Subject string
Body string
Tags []Tag `gorm:"many2many:blog_tags;"`
}
type Tag struct {
ID uint `gorm:"primary_key"`
Locale string `gorm:"primary_key"`
Value string
}
func TestManyToManyWithMultiPrimaryKeys(t *testing.T) {
if dialect := os.Getenv("GORM_DIALECT"); dialect != "sqlite" {
DB.Exec(fmt.Sprintf("drop table blog_tags;"))
DB.AutoMigrate(&Blog{}, &Tag{})
blog := Blog{
Locale: "ZH",
Subject: "subject",
Body: "body",
Tags: []Tag{
{Locale: "ZH", Value: "tag1"},
{Locale: "ZH", Value: "tag2"},
},
}
DB.Save(&blog)
DB.Model(&blog).Association("Tags").Append([]Tag{{Locale: "ZH", Value: "tag3"}})
var tags []Tag
DB.Model(&blog).Related(&tags, "Tags")
if len(tags) != 3 {
t.Errorf("should found 3 tags with blog")
}
}
}