gorm/tests/delete_test.go

package tests_test

import (
	"errors"
	"testing"

	"gorm.io/gorm"
	. "gorm.io/gorm/utils/tests"
)

func TestDelete(t *testing.T) {
	var users = []User{*GetUser("delete", Config{}), *GetUser("delete", Config{}), *GetUser("delete", Config{})}

	if err := DB.Create(&users).Error; err != nil {
		t.Errorf("errors happened when create: %v", err)
	}

	for _, user := range users {
		if user.ID == 0 {
			t.Fatalf("user's primary key should has value after create, got : %v", user.ID)
		}
	}

	if err := DB.Delete(&users[1]).Error; err != nil {
		t.Errorf("errors happened when delete: %v", err)
	}

	var result User
	if err := DB.Where("id = ?", users[1].ID).First(&result).Error; err == nil || !errors.Is(err, gorm.ErrRecordNotFound) {
		t.Errorf("should returns record not found error, but got %v", err)
	}

	for _, user := range []User{users[0], users[2]} {
		result = User{}
		if err := DB.Where("id = ?", user.ID).First(&result).Error; err != nil {
			t.Errorf("no error should returns when query %v, but got %v", user.ID, err)
		}
	}

	for _, user := range []User{users[0], users[2]} {
		result = User{}
		if err := DB.Where("id = ?", user.ID).First(&result).Error; err != nil {
			t.Errorf("no error should returns when query %v, but got %v", user.ID, err)
		}
	}

	if err := DB.Delete(users[0]).Error; err != nil {
		t.Errorf("errors happened when delete: %v", err)
	}

	if err := DB.Where("id = ?", users[0].ID).First(&result).Error; err == nil || !errors.Is(err, gorm.ErrRecordNotFound) {
		t.Errorf("should returns record not found error, but got %v", err)
	}
}

func TestDeleteWithTable(t *testing.T) {
	type UserWithDelete struct {
		gorm.Model
		Name string
	}

	DB.Table("deleted_users").Migrator().DropTable(UserWithDelete{})
	DB.Table("deleted_users").AutoMigrate(UserWithDelete{})

	user := UserWithDelete{Name: "delete1"}
	DB.Table("deleted_users").Create(&user)

	var result UserWithDelete
	if err := DB.Table("deleted_users").First(&result).Error; err != nil {
		t.Errorf("failed to find deleted user, got error %v", err)
	}

	AssertEqual(t, result, user)

	if err := DB.Table("deleted_users").Delete(&result).Error; err != nil {
		t.Errorf("failed to delete user, got error %v", err)
	}

	var result2 UserWithDelete
	if err := DB.Table("deleted_users").First(&result2, user.ID).Error; !errors.Is(err, gorm.ErrRecordNotFound) {
		t.Errorf("should raise record not found error, but got error %v", err)
	}

	var result3 UserWithDelete
	if err := DB.Table("deleted_users").Unscoped().First(&result3, user.ID).Error; err != nil {
		t.Fatalf("failed to find record, got error %v", err)
	}

	if err := DB.Table("deleted_users").Unscoped().Delete(&result).Error; err != nil {
		t.Errorf("failed to delete user with unscoped, got error %v", err)
	}

	var result4 UserWithDelete
	if err := DB.Table("deleted_users").Unscoped().First(&result4, user.ID).Error; !errors.Is(err, gorm.ErrRecordNotFound) {
		t.Errorf("should raise record not found error, but got error %v", err)
	}
}

func TestInlineCondDelete(t *testing.T) {
	user1 := *GetUser("inline_delete_1", Config{})
	user2 := *GetUser("inline_delete_2", Config{})
	DB.Save(&user1).Save(&user2)

	if DB.Delete(&User{}, user1.ID).Error != nil {
		t.Errorf("No error should happen when delete a record")
	} else if err := DB.Where("name = ?", user1.Name).First(&User{}).Error; !errors.Is(err, gorm.ErrRecordNotFound) {
		t.Errorf("User can't be found after delete")
	}

	if err := DB.Delete(&User{}, "name = ?", user2.Name).Error; err != nil {
		t.Errorf("No error should happen when delete a record, err=%s", err)
	} else if err := DB.Where("name = ?", user2.Name).First(&User{}).Error; !errors.Is(err, gorm.ErrRecordNotFound) {
		t.Errorf("User can't be found after delete")
	}
}

func TestBlockGlobalDelete(t *testing.T) {
	if err := DB.Delete(&User{}).Error; err == nil || !errors.Is(err, gorm.ErrMissingWhereClause) {
		t.Errorf("should returns missing WHERE clause while deleting error")
	}

	if err := DB.Session(&gorm.Session{AllowGlobalUpdate: true}).Delete(&User{}).Error; err != nil {
		t.Errorf("should returns no error while enable global update, but got err %v", err)
	}
}