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associations_many2many_test.go
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associations_many2many_test.go
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package tests_test
import (
"fmt"
"sync"
"testing"
"gorm.io/gorm"
"gorm.io/gorm/clause"
. "gorm.io/gorm/utils/tests"
)
func TestMany2ManyAssociation(t *testing.T) {
user := *GetUser("many2many", Config{Languages: 2})
if err := DB.Create(&user).Error; err != nil {
t.Fatalf("errors happened when create: %v", err)
}
CheckUser(t, user, user)
// Find
var user2 User
DB.Find(&user2, "id = ?", user.ID)
DB.Model(&user2).Association("Languages").Find(&user2.Languages)
CheckUser(t, user2, user)
// Count
AssertAssociationCount(t, user, "Languages", 2, "")
// Append
language := Language{Code: "language-many2many-append", Name: "language-many2many-append"}
DB.Create(&language)
if err := DB.Model(&user2).Association("Languages").Append(&language); err != nil {
t.Fatalf("Error happened when append account, got %v", err)
}
user.Languages = append(user.Languages, language)
CheckUser(t, user2, user)
AssertAssociationCount(t, user, "Languages", 3, "AfterAppend")
languages := []Language{
{Code: "language-many2many-append-1-1", Name: "language-many2many-append-1-1"},
{Code: "language-many2many-append-2-1", Name: "language-many2many-append-2-1"},
}
DB.Create(&languages)
if err := DB.Model(&user2).Association("Languages").Append(&languages); err != nil {
t.Fatalf("Error happened when append language, got %v", err)
}
user.Languages = append(user.Languages, languages...)
CheckUser(t, user2, user)
AssertAssociationCount(t, user, "Languages", 5, "AfterAppendSlice")
// Replace
language2 := Language{Code: "language-many2many-replace", Name: "language-many2many-replace"}
DB.Create(&language2)
if err := DB.Model(&user2).Association("Languages").Replace(&language2); err != nil {
t.Fatalf("Error happened when append language, got %v", err)
}
user.Languages = []Language{language2}
CheckUser(t, user2, user)
AssertAssociationCount(t, user2, "Languages", 1, "AfterReplace")
// Delete
if err := DB.Model(&user2).Association("Languages").Delete(&Language{}); err != nil {
t.Fatalf("Error happened when delete language, got %v", err)
}
AssertAssociationCount(t, user2, "Languages", 1, "after delete non-existing data")
if err := DB.Model(&user2).Association("Languages").Delete(&language2); err != nil {
t.Fatalf("Error happened when delete Languages, got %v", err)
}
AssertAssociationCount(t, user2, "Languages", 0, "after delete")
// Prepare Data for Clear
if err := DB.Model(&user2).Association("Languages").Append(&language); err != nil {
t.Fatalf("Error happened when append Languages, got %v", err)
}
AssertAssociationCount(t, user2, "Languages", 1, "after prepare data")
// Clear
if err := DB.Model(&user2).Association("Languages").Clear(); err != nil {
t.Errorf("Error happened when clear Languages, got %v", err)
}
AssertAssociationCount(t, user2, "Languages", 0, "after clear")
}
func TestMany2ManyOmitAssociations(t *testing.T) {
tidbSkip(t, "not support the foreign key feature")
user := *GetUser("many2many_omit_associations", Config{Languages: 2})
if err := DB.Omit("Languages.*").Create(&user).Error; err == nil {
t.Fatalf("should raise error when create users without languages reference")
}
if err := DB.Create(&user.Languages).Error; err != nil {
t.Fatalf("no error should happen when create languages, but got %v", err)
}
if err := DB.Omit("Languages.*").Create(&user).Error; err != nil {
t.Fatalf("no error should happen when create user when languages exists, but got %v", err)
}
// Find
var languages []Language
if DB.Model(&user).Association("Languages").Find(&languages); len(languages) != 2 {
t.Errorf("languages count should be %v, but got %v", 2, len(languages))
}
newLang := Language{Code: "omitmany2many", Name: "omitmany2many"}
if err := DB.Model(&user).Omit("Languages.*").Association("Languages").Replace(&newLang); err == nil {
t.Errorf("should failed to insert languages due to constraint failed, error: %v", err)
}
}
func TestMany2ManyAssociationForSlice(t *testing.T) {
users := []User{
*GetUser("slice-many2many-1", Config{Languages: 2}),
*GetUser("slice-many2many-2", Config{Languages: 0}),
*GetUser("slice-many2many-3", Config{Languages: 4}),
}
DB.Create(&users)
// Count
AssertAssociationCount(t, users, "Languages", 6, "")
// Find
var languages []Language
if DB.Model(&users).Association("Languages").Find(&languages); len(languages) != 6 {
t.Errorf("languages count should be %v, but got %v", 6, len(languages))
}
// Append
languages1 := []Language{
{Code: "language-many2many-append-1", Name: "language-many2many-append-1"},
}
languages2 := []Language{}
languages3 := []Language{
{Code: "language-many2many-append-3-1", Name: "language-many2many-append-3-1"},
{Code: "language-many2many-append-3-2", Name: "language-many2many-append-3-2"},
}
DB.Create(&languages1)
DB.Create(&languages3)
DB.Model(&users).Association("Languages").Append(&languages1, &languages2, &languages3)
AssertAssociationCount(t, users, "Languages", 9, "After Append")
languages2_1 := []*Language{
{Code: "language-slice-replace-1-1", Name: "language-slice-replace-1-1"},
{Code: "language-slice-replace-1-2", Name: "language-slice-replace-1-2"},
}
languages2_2 := []*Language{
{Code: "language-slice-replace-2-1", Name: "language-slice-replace-2-1"},
{Code: "language-slice-replace-2-2", Name: "language-slice-replace-2-2"},
}
languages2_3 := &Language{Code: "language-slice-replace-3", Name: "language-slice-replace-3"}
DB.Create(&languages2_1)
DB.Create(&languages2_2)
DB.Create(&languages2_3)
// Replace
DB.Model(&users).Association("Languages").Replace(&languages2_1, &languages2_2, languages2_3)
AssertAssociationCount(t, users, "Languages", 5, "After Replace")
// Delete
if err := DB.Model(&users).Association("Languages").Delete(&users[2].Languages); err != nil {
t.Errorf("no error should happened when deleting language, but got %v", err)
}
AssertAssociationCount(t, users, "Languages", 4, "after delete")
if err := DB.Model(&users).Association("Languages").Delete(users[0].Languages[0], users[1].Languages[1]); err != nil {
t.Errorf("no error should happened when deleting language, but got %v", err)
}
AssertAssociationCount(t, users, "Languages", 2, "after delete")
// Clear
DB.Model(&users).Association("Languages").Clear()
AssertAssociationCount(t, users, "Languages", 0, "After Clear")
}
func TestSingleTableMany2ManyAssociation(t *testing.T) {
user := *GetUser("many2many", Config{Friends: 2})
if err := DB.Create(&user).Error; err != nil {
t.Fatalf("errors happened when create: %v", err)
}
CheckUser(t, user, user)
// Find
var user2 User
DB.Find(&user2, "id = ?", user.ID)
DB.Model(&user2).Association("Friends").Find(&user2.Friends)
CheckUser(t, user2, user)
// Count
AssertAssociationCount(t, user, "Friends", 2, "")
// Append
friend := *GetUser("friend", Config{})
if err := DB.Model(&user2).Association("Friends").Append(&friend); err != nil {
t.Fatalf("Error happened when append account, got %v", err)
}
user.Friends = append(user.Friends, &friend)
CheckUser(t, user2, user)
AssertAssociationCount(t, user, "Friends", 3, "AfterAppend")
friends := []*User{GetUser("friend-append-1", Config{}), GetUser("friend-append-2", Config{})}
if err := DB.Model(&user2).Association("Friends").Append(&friends); err != nil {
t.Fatalf("Error happened when append friend, got %v", err)
}
user.Friends = append(user.Friends, friends...)
CheckUser(t, user2, user)
AssertAssociationCount(t, user, "Friends", 5, "AfterAppendSlice")
// Replace
friend2 := *GetUser("friend-replace-2", Config{})
if err := DB.Model(&user2).Association("Friends").Replace(&friend2); err != nil {
t.Fatalf("Error happened when append friend, got %v", err)
}
user.Friends = []*User{&friend2}
CheckUser(t, user2, user)
AssertAssociationCount(t, user2, "Friends", 1, "AfterReplace")
// Delete
if err := DB.Model(&user2).Association("Friends").Delete(&User{}); err != nil {
t.Fatalf("Error happened when delete friend, got %v", err)
}
AssertAssociationCount(t, user2, "Friends", 1, "after delete non-existing data")
if err := DB.Model(&user2).Association("Friends").Delete(&friend2); err != nil {
t.Fatalf("Error happened when delete Friends, got %v", err)
}
AssertAssociationCount(t, user2, "Friends", 0, "after delete")
// Prepare Data for Clear
if err := DB.Model(&user2).Association("Friends").Append(&friend); err != nil {
t.Fatalf("Error happened when append Friends, got %v", err)
}
AssertAssociationCount(t, user2, "Friends", 1, "after prepare data")
// Clear
if err := DB.Model(&user2).Association("Friends").Clear(); err != nil {
t.Errorf("Error happened when clear Friends, got %v", err)
}
AssertAssociationCount(t, user2, "Friends", 0, "after clear")
}
func TestSingleTableMany2ManyAssociationForSlice(t *testing.T) {
users := []User{
*GetUser("slice-many2many-1", Config{Team: 2}),
*GetUser("slice-many2many-2", Config{Team: 0}),
*GetUser("slice-many2many-3", Config{Team: 4}),
}
DB.Create(&users)
// Count
AssertAssociationCount(t, users, "Team", 6, "")
// Find
var teams []User
if DB.Model(&users).Association("Team").Find(&teams); len(teams) != 6 {
t.Errorf("teams count should be %v, but got %v", 6, len(teams))
}
// Append
teams1 := []User{*GetUser("friend-append-1", Config{})}
teams2 := []User{}
teams3 := []*User{GetUser("friend-append-3-1", Config{}), GetUser("friend-append-3-2", Config{})}
DB.Model(&users).Association("Team").Append(&teams1, &teams2, &teams3)
AssertAssociationCount(t, users, "Team", 9, "After Append")
teams2_1 := []User{*GetUser("friend-replace-1", Config{}), *GetUser("friend-replace-2", Config{})}
teams2_2 := []User{*GetUser("friend-replace-2-1", Config{}), *GetUser("friend-replace-2-2", Config{})}
teams2_3 := GetUser("friend-replace-3-1", Config{})
// Replace
DB.Model(&users).Association("Team").Replace(&teams2_1, &teams2_2, teams2_3)
AssertAssociationCount(t, users, "Team", 5, "After Replace")
// Delete
if err := DB.Model(&users).Association("Team").Delete(&users[2].Team); err != nil {
t.Errorf("no error should happened when deleting team, but got %v", err)
}
AssertAssociationCount(t, users, "Team", 4, "after delete")
if err := DB.Model(&users).Association("Team").Delete(users[0].Team[0], users[1].Team[1]); err != nil {
t.Errorf("no error should happened when deleting team, but got %v", err)
}
AssertAssociationCount(t, users, "Team", 2, "after delete")
// Clear
DB.Model(&users).Association("Team").Clear()
AssertAssociationCount(t, users, "Team", 0, "After Clear")
}
func TestDuplicateMany2ManyAssociation(t *testing.T) {
user1 := User{Name: "TestDuplicateMany2ManyAssociation-1", Languages: []Language{
{Code: "TestDuplicateMany2ManyAssociation-language-1"},
{Code: "TestDuplicateMany2ManyAssociation-language-2"},
}}
user2 := User{Name: "TestDuplicateMany2ManyAssociation-1", Languages: []Language{
{Code: "TestDuplicateMany2ManyAssociation-language-1"},
{Code: "TestDuplicateMany2ManyAssociation-language-3"},
}}
users := []*User{&user1, &user2}
var err error
err = DB.Session(&gorm.Session{FullSaveAssociations: true}).Save(users).Error
AssertEqual(t, nil, err)
var findUser1 User
err = DB.Preload("Languages").Where("id = ?", user1.ID).First(&findUser1).Error
AssertEqual(t, nil, err)
AssertEqual(t, user1, findUser1)
var findUser2 User
err = DB.Preload("Languages").Where("id = ?", user2.ID).First(&findUser2).Error
AssertEqual(t, nil, err)
AssertEqual(t, user2, findUser2)
}
func TestConcurrentMany2ManyAssociation(t *testing.T) {
db, err := OpenTestConnection(&gorm.Config{})
if err != nil {
t.Fatalf("open test connection failed, err: %+v", err)
}
count := 3
var languages []Language
for i := 0; i < count; i++ {
language := Language{Code: fmt.Sprintf("consurrent %d", i)}
db.Create(&language)
languages = append(languages, language)
}
user := User{}
db.Create(&user)
db.Preload("Languages").FirstOrCreate(&user)
var wg sync.WaitGroup
for i := 0; i < count; i++ {
wg.Add(1)
go func(user User, language Language) {
err := db.Model(&user).Association("Languages").Append(&language)
AssertEqual(t, err, nil)
wg.Done()
}(user, languages[i])
}
wg.Wait()
var find User
err = db.Preload(clause.Associations).Where("id = ?", user.ID).First(&find).Error
AssertEqual(t, err, nil)
AssertAssociationCount(t, find, "Languages", int64(count), "after concurrent append")
}
func TestMany2ManyDuplicateBelongsToAssociation(t *testing.T) {
user1 := User{Name: "TestMany2ManyDuplicateBelongsToAssociation-1", Friends: []*User{
{Name: "TestMany2ManyDuplicateBelongsToAssociation-friend-1", Company: Company{
ID: 1,
Name: "Test-company-1",
}},
}}
user2 := User{Name: "TestMany2ManyDuplicateBelongsToAssociation-2", Friends: []*User{
{Name: "TestMany2ManyDuplicateBelongsToAssociation-friend-2", Company: Company{
ID: 1,
Name: "Test-company-1",
}},
}}
users := []*User{&user1, &user2}
var err error
err = DB.Session(&gorm.Session{FullSaveAssociations: true}).Save(users).Error
AssertEqual(t, nil, err)
var findUser1 User
err = DB.Preload("Friends.Company").Where("id = ?", user1.ID).First(&findUser1).Error
AssertEqual(t, nil, err)
AssertEqual(t, user1, findUser1)
var findUser2 User
err = DB.Preload("Friends.Company").Where("id = ?", user2.ID).First(&findUser2).Error
AssertEqual(t, nil, err)
AssertEqual(t, user2, findUser2)
}