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preload_associations_test.go
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preload_associations_test.go
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package pop
import (
"github.com/gobuffalo/nulls"
"github.com/stretchr/testify/require"
"testing"
)
func Test_New_Implementation_For_Nplus1(t *testing.T) {
if PDB == nil {
t.Skip("skipping integration tests")
}
transaction(func(tx *Connection) {
a := require.New(t)
for _, name := range []string{"Mark", "Joe", "Jane"} {
user := User{Name: nulls.NewString(name)}
a.NoError(tx.Create(&user))
book := Book{UserID: nulls.NewInt(user.ID)}
a.NoError(tx.Create(&book))
writer := Writer{Name: "Larry", BookID: book.ID}
a.NoError(tx.Create(&writer))
if name == "Mark" {
song := Song{UserID: user.ID}
a.NoError(tx.Create(&song))
address := Address{Street: "Pop"}
a.NoError(tx.Create(&address))
home := UsersAddress{UserID: user.ID, AddressID: address.ID}
a.NoError(tx.Create(&home))
}
}
users := []User{}
a.NoError(tx.All(&users))
// FILL THE HAS-MANY and HAS_ONE
a.NoError(preload(tx, &users))
a.Len(users[0].Books, 1)
a.Len(users[1].Books, 1)
a.Len(users[2].Books, 1)
a.Equal(users[0].FavoriteSong.UserID, users[0].ID)
a.Len(users[0].Houses, 1)
book := Book{}
a.NoError(tx.First(&book))
a.NoError(preload(tx, &book))
a.Len(book.Writers, 1)
a.Equal("Larry", book.Writers[0].Name)
a.Equal("Mark", book.User.Name.String)
usersWithPointers := []UserPointerAssocs{}
a.NoError(tx.All(&usersWithPointers))
// FILL THE HAS-MANY and HAS_ONE
a.NoError(preload(tx, &usersWithPointers))
a.Len(usersWithPointers[0].Books, 1)
a.Len(usersWithPointers[1].Books, 1)
a.Len(usersWithPointers[2].Books, 1)
a.Equal(usersWithPointers[0].FavoriteSong.UserID, users[0].ID)
a.Len(usersWithPointers[0].Houses, 1)
})
}
func Test_New_Implementation_For_Nplus1_With_UUID(t *testing.T) {
if PDB == nil {
t.Skip("skipping integration tests")
}
transaction(func(tx *Connection) {
a := require.New(t)
courses := []Course{}
for i := 0; i < 3; i++ {
course := Course{}
a.NoError(tx.Create(&course))
courses = append(courses, course)
if i == 0 {
a.NoError(tx.Create(&CourseCode{
CourseID: course.ID,
}))
}
}
courseCodes := []CourseCode{}
a.NoError(tx.All(&courseCodes))
a.Len(courseCodes, 1)
// FILL THE HAS-MANY and HAS_ONE
a.NoError(preload(tx, &courseCodes))
a.Equal(courses[0].ID, courseCodes[0].Course.ID)
student := Student{}
a.NoError(tx.Create(&student))
parent := Parent{}
a.NoError(tx.Create(&parent))
a.NoError(tx.RawQuery("insert into parents_students(parent_id, student_id) values(?,?)", parent.ID.String(), student.ID.String()).Exec())
parents := []Parent{}
a.NoError(tx.All(&parents))
a.NoError(preload(tx, &parents))
a.Len(parents, 1)
a.Len(parents[0].Students, 1)
a.Equal(student.ID, parents[0].Students[0].ID)
})
}
func Test_New_Implementation_For_Nplus1_With_NullUUIDs_And_FK_ID(t *testing.T) {
if PDB == nil {
t.Skip("skipping integration tests")
}
// This test suite prevents regressions of an obscure bug in the preload code which caused
// pointer values to be set with their empty values when relations did not exist.
//
// See also: https://github.com/gobuffalo/pop/issues/139
transaction(func(tx *Connection) {
a := require.New(t)
var server Server
a.NoError(tx.Create(&server))
class := &NetClient{
// The bug only appears when we have two elements in the slice where
// one has a relation and the other one has no such relation.
Hops: []Hop{
{Server: &server},
{},
}}
// This code basically just sets up
a.NoError(tx.Eager().Create(class))
var expected NetClient
a.NoError(tx.EagerPreload("Hops.Server").First(&expected))
// What would happen before the patch resolved this issue is that:
//
// Classes.CourseCodes[0].Course would be the correct value (a filled struct)
//
// "server": {
// "id": "fa51f71f-e884-4641-8005-923258b814f9",
// "created_at": "2021-12-09T23:20:10.208019+01:00",
// "updated_at": "2021-12-09T23:20:10.208019+01:00"
// },
//
// Classes.CourseCodes[1].Course would an "empty" struct of Course even though there is no relation set up:
//
// "server": {
// "id": "00000000-0000-0000-0000-000000000000",
// "created_at": "0001-01-01T00:00:00Z",
// "updated_at": "0001-01-01T00:00:00Z"
// },
var foundValid, foundEmpty int
for _, hop := range expected.Hops {
if hop.ServerID.Valid {
foundValid++
a.NotNil(hop.Server, "%+v", hop)
} else {
foundEmpty++
a.Nil(hop.Server, "%+v", hop)
}
}
a.Equal(1, foundValid)
a.Equal(1, foundEmpty)
})
}
func Test_New_Implementation_For_Nplus1_Single(t *testing.T) {
if PDB == nil {
t.Skip("skipping integration tests")
}
transaction(func(tx *Connection) {
a := require.New(t)
for _, name := range []string{"Mark", "Joe", "Jane"} {
user := User{Name: nulls.NewString(name)}
a.NoError(tx.Create(&user))
book := Book{UserID: nulls.NewInt(user.ID)}
a.NoError(tx.Create(&book))
writer := Writer{Name: "Larry", BookID: book.ID}
a.NoError(tx.Create(&writer))
if name == "Mark" {
song := Song{UserID: user.ID}
a.NoError(tx.Create(&song))
address := Address{Street: "Pop"}
a.NoError(tx.Create(&address))
home := UsersAddress{UserID: user.ID, AddressID: address.ID}
a.NoError(tx.Create(&home))
}
}
users := []User{}
a.NoError(tx.All(&users))
// FILL THE HAS-MANY and HAS_ONE
a.NoError(preload(tx, &users, "Books"))
a.Len(users[0].Books, 1)
a.Len(users[1].Books, 1)
a.Len(users[2].Books, 1)
a.Zero(users[0].FavoriteSong.UserID)
a.Len(users[0].Houses, 0)
})
}
func Test_New_Implementation_For_Nplus1_Nested(t *testing.T) {
if PDB == nil {
t.Skip("skipping integration tests")
}
transaction(func(tx *Connection) {
a := require.New(t)
var song Song
for _, name := range []string{"Mark", "Joe", "Jane"} {
user := User{Name: nulls.NewString(name)}
a.NoError(tx.Create(&user))
book := Book{UserID: nulls.NewInt(user.ID)}
a.NoError(tx.Create(&book))
if name == "Mark" {
song = Song{UserID: user.ID}
a.NoError(tx.Create(&song))
address := Address{Street: "Pop"}
a.NoError(tx.Create(&address))
home := UsersAddress{UserID: user.ID, AddressID: address.ID}
a.NoError(tx.Create(&home))
}
}
SetEagerMode(EagerPreload)
users := []User{}
a.NoError(tx.Eager("Houses", "Books", "Books.User.FavoriteSong").All(&users))
a.Len(users[0].Books, 1)
a.Len(users[1].Books, 1)
a.Len(users[2].Books, 1)
a.Len(users[0].Houses, 1)
a.Equal(users[0].ID, users[0].Books[0].User.ID)
a.Equal(song.ID, users[0].Books[0].User.FavoriteSong.ID)
SetEagerMode(EagerDefault)
})
}
func Test_New_Implementation_For_Nplus1_BelongsTo_Not_Underscore(t *testing.T) {
if PDB == nil {
t.Skip("skipping integration tests")
}
transaction(func(tx *Connection) {
a := require.New(t)
user := User{Name: nulls.NewString("Mark")}
a.NoError(tx.Create(&user))
taxi := Taxi{UserID: nulls.NewInt(user.ID)}
a.NoError(tx.Create(&taxi))
SetEagerMode(EagerPreload)
taxis := []Taxi{}
a.NoError(tx.EagerPreload().All(&taxis))
a.Len(taxis, 1)
a.Equal("Mark", taxis[0].Driver.Name.String)
SetEagerMode(EagerDefault)
})
}
func Test_New_Implementation_For_BelongsTo_Multiple_Fields(t *testing.T) {
if PDB == nil {
t.Skip("skipping integration tests")
}
transaction(func(tx *Connection) {
a := require.New(t)
user := User{Name: nulls.NewString("Mark")}
a.NoError(tx.Create(&user))
address := Address{HouseNumber: 2, Street: "Street One"}
a.NoError(tx.Create(&address))
taxi := Taxi{UserID: nulls.NewInt(user.ID), AddressID: nulls.NewInt(address.ID)}
a.NoError(tx.Create(&taxi))
book := Book{TaxiID: nulls.NewInt(taxi.ID), Title: "My Book"}
a.NoError(tx.Create(&book))
SetEagerMode(EagerPreload)
books := []Book{}
a.NoError(tx.EagerPreload("Taxi.Driver", "Taxi.Address").All(&books))
a.Len(books, 1)
a.Equal(user.Name.String, books[0].Taxi.Driver.Name.String)
a.Equal(address.Street, books[0].Taxi.Address.Street)
SetEagerMode(EagerDefault)
})
}
func Test_New_Implementation_For_BelongsTo_Ptr_Field(t *testing.T) {
if PDB == nil {
t.Skip("skipping integration tests")
}
transaction(func(tx *Connection) {
a := require.New(t)
toAddress := Address{HouseNumber: 1, Street: "Destination Ave"}
a.NoError(tx.Create(&toAddress))
taxi := Taxi{ToAddressID: &toAddress.ID}
a.NoError(tx.Create(&taxi))
book1 := Book{TaxiID: nulls.NewInt(taxi.ID), Title: "My Book"}
a.NoError(tx.Create(&book1))
taxiNilToAddress := Taxi{ToAddressID: nil}
a.NoError(tx.Create(&taxiNilToAddress))
book2 := Book{TaxiID: nulls.NewInt(taxiNilToAddress.ID), Title: "Another Book"}
a.NoError(tx.Create(&book2))
SetEagerMode(EagerPreload)
books := []Book{}
a.NoError(tx.EagerPreload("Taxi.ToAddress").Order("created_at").All(&books))
a.Len(books, 2)
a.Equal(toAddress.Street, books[0].Taxi.ToAddress.Street)
a.NotNil(books[0].Taxi.ToAddressID)
a.Nil(books[1].Taxi.ToAddress)
a.Nil(books[1].Taxi.ToAddressID)
SetEagerMode(EagerDefault)
})
}
func Test_New_Implementation_For_HasMany_Ptr_Field(t *testing.T) {
if PDB == nil {
t.Skip("skipping integration tests")
}
transaction(func(tx *Connection) {
a := require.New(t)
toAddress1 := Address{HouseNumber: 1, Street: "Destination Ave"}
a.NoError(tx.Create(&toAddress1))
taxi1 := Taxi{Model: "Ford", ToAddressID: &toAddress1.ID}
a.NoError(tx.Create(&taxi1))
taxi2 := Taxi{Model: "Honda", ToAddressID: &toAddress1.ID}
a.NoError(tx.Create(&taxi2))
taxiNilToAddress := Taxi{ToAddressID: nil}
a.NoError(tx.Create(&taxiNilToAddress))
toAddress2 := Address{HouseNumber: 2, Street: "Final Way"}
a.NoError(tx.Create(&toAddress2))
taxi3 := Taxi{Model: "Mazda", ToAddressID: &toAddress2.ID}
a.NoError(tx.Create(&taxi3))
SetEagerMode(EagerPreload)
addresses := []Address{}
a.NoError(tx.EagerPreload("TaxisToHere").Order("created_at").All(&addresses))
a.Len(addresses, 2)
a.NotNil(addresses[0].TaxisToHere)
a.Len(addresses[0].TaxisToHere, 2)
a.Equal(taxi1.Model, addresses[0].TaxisToHere[0].Model)
a.Equal(taxi2.Model, addresses[0].TaxisToHere[1].Model)
a.NotNil(addresses[1].TaxisToHere)
a.Len(addresses[1].TaxisToHere, 1)
a.Equal(taxi3.Model, addresses[1].TaxisToHere[0].Model)
SetEagerMode(EagerDefault)
})
}