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Add save associations for bulk create

This commit is contained in:
Jinzhu 2020-04-19 23:11:56 +08:00
parent 158bacefbe
commit 7bcd95d4b8
3 changed files with 229 additions and 115 deletions
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218
callbacks/associations.go
View File

@ -10,41 +10,75 @@ import (
func SaveBeforeAssociations(db *gorm.DB) {
if db.Statement.Schema != nil {
selectColumns, restricted := SelectAndOmitColumns(db.Statement, true, false)
// Save Belongs To associations
for _, rel := range db.Statement.Schema.Relationships.BelongsTo {
creatable, updatable, saveRef := saveAssociationCheck(db, rel.Field)
if !(creatable || updatable) {
if !saveAssociationCheck(db, rel, selectColumns, restricted) {
continue
}
switch db.Statement.ReflectValue.Kind() {
case reflect.Slice:
case reflect.Struct:
if _, zero := rel.Field.ValueOf(db.Statement.ReflectValue); !zero {
f := rel.Field.ReflectValueOf(db.Statement.ReflectValue)
_, isZero := rel.FieldSchema.PrioritizedPrimaryField.ValueOf(f)
var (
objs []reflect.Value
fieldType = rel.Field.FieldType
isPtr = fieldType.Kind() == reflect.Ptr
)
if isZero && creatable {
if f.Kind() == reflect.Ptr {
db.Session(&gorm.Session{}).Create(f.Interface())
} else {
db.Session(&gorm.Session{}).Create(f.Addr().Interface())
}
} else if !isZero && updatable {
if f.Kind() == reflect.Ptr {
db.Session(&gorm.Session{}).Save(f.Interface())
} else {
db.Session(&gorm.Session{}).Save(f.Addr().Interface())
}
} else {
continue
if !isPtr {
fieldType = reflect.PtrTo(fieldType)
}
if saveRef {
elems := reflect.MakeSlice(reflect.SliceOf(fieldType), 0, 0)
for i := 0; i < db.Statement.ReflectValue.Len(); i++ {
obj := db.Statement.ReflectValue.Index(i)
if _, zero := rel.Field.ValueOf(obj); !zero { // check belongs to relation value
rv := rel.Field.ReflectValueOf(obj) // relation reflect value
if _, isZero := rel.FieldSchema.PrioritizedPrimaryField.ValueOf(rv); isZero {
objs = append(objs, obj)
if isPtr {
elems = reflect.Append(elems, rv)
} else {
elems = reflect.Append(elems, rv.Addr())
}
} else {
for _, ref := range rel.References {
if !ref.OwnPrimaryKey {
fv, _ := ref.PrimaryKey.ValueOf(f)
ref.ForeignKey.Set(db.Statement.ReflectValue, fv)
pv, _ := ref.PrimaryKey.ValueOf(rv)
ref.ForeignKey.Set(objs[i], pv)
}
}
}
}
}
if elems.Len() > 0 {
if db.AddError(db.Session(&gorm.Session{}).Create(elems.Interface()).Error) == nil {
for i := 0; i < elems.Len(); i++ {
for _, ref := range rel.References {
if !ref.OwnPrimaryKey {
pv, _ := ref.PrimaryKey.ValueOf(elems.Index(i))
ref.ForeignKey.Set(objs[i], pv)
}
}
}
}
}
case reflect.Struct:
if _, zero := rel.Field.ValueOf(db.Statement.ReflectValue); !zero {
rv := rel.Field.ReflectValueOf(db.Statement.ReflectValue) // relation reflect value
if _, isZero := rel.FieldSchema.PrioritizedPrimaryField.ValueOf(rv); isZero {
if rv.Kind() == reflect.Ptr {
db.Session(&gorm.Session{}).Create(rv.Interface())
} else {
db.Session(&gorm.Session{}).Create(rv.Addr().Interface())
}
for _, ref := range rel.References {
if !ref.OwnPrimaryKey {
pv, _ := ref.PrimaryKey.ValueOf(rv)
ref.ForeignKey.Set(db.Statement.ReflectValue, pv)
}
}
}
@ -55,20 +89,58 @@ func SaveBeforeAssociations(db *gorm.DB) {
}
func SaveAfterAssociations(db *gorm.DB) {
if db.Statement.Schema != nil {
selectColumns, restricted := SelectAndOmitColumns(db.Statement, true, false)
// Save Has One associations
for _, rel := range db.Statement.Schema.Relationships.HasOne {
creatable, updatable, saveRef := saveAssociationCheck(db, rel.Field)
if !(creatable || updatable) {
if !saveAssociationCheck(db, rel, selectColumns, restricted) {
continue
}
switch db.Statement.ReflectValue.Kind() {
case reflect.Slice:
var (
fieldType = rel.Field.FieldType
isPtr = fieldType.Kind() == reflect.Ptr
)
if !isPtr {
fieldType = reflect.PtrTo(fieldType)
}
elems := reflect.MakeSlice(reflect.SliceOf(fieldType), 0, 0)
for i := 0; i < db.Statement.ReflectValue.Len(); i++ {
obj := db.Statement.ReflectValue.Index(i)
if rv, zero := rel.Field.ValueOf(obj); !zero {
rv := reflect.ValueOf(rv)
for _, ref := range rel.References {
if ref.OwnPrimaryKey {
fv, _ := ref.PrimaryKey.ValueOf(obj)
ref.ForeignKey.Set(rv, fv)
} else if ref.PrimaryValue != "" {
ref.ForeignKey.Set(rv, ref.PrimaryValue)
}
}
if _, isZero := rel.FieldSchema.PrioritizedPrimaryField.ValueOf(rv); isZero {
if isPtr {
elems = reflect.Append(elems, rv)
} else {
elems = reflect.Append(elems, rv.Addr())
}
}
}
}
if elems.Len() > 0 {
db.Session(&gorm.Session{}).Create(elems.Interface())
}
case reflect.Struct:
if _, zero := rel.Field.ValueOf(db.Statement.ReflectValue); !zero {
f := rel.Field.ReflectValueOf(db.Statement.ReflectValue)
if saveRef {
for _, ref := range rel.References {
if ref.OwnPrimaryKey {
fv, _ := ref.PrimaryKey.ValueOf(db.Statement.ReflectValue)
@ -77,24 +149,13 @@ func SaveAfterAssociations(db *gorm.DB) {
ref.ForeignKey.Set(f, ref.PrimaryValue)
}
}
}
_, isZero := rel.FieldSchema.PrioritizedPrimaryField.ValueOf(f)
if isZero && creatable {
if _, isZero := rel.FieldSchema.PrioritizedPrimaryField.ValueOf(f); isZero {
if f.Kind() == reflect.Ptr {
db.Session(&gorm.Session{}).Create(f.Interface())
} else {
db.Session(&gorm.Session{}).Create(f.Addr().Interface())
}
} else if !isZero && updatable {
if f.Kind() == reflect.Ptr {
db.Session(&gorm.Session{}).Save(f.Interface())
} else {
db.Session(&gorm.Session{}).Save(f.Addr().Interface())
}
} else {
continue
}
}
}
@ -102,8 +163,60 @@ func SaveAfterAssociations(db *gorm.DB) {
// Save Has Many associations
for _, rel := range db.Statement.Schema.Relationships.HasMany {
creatable, updatable, _ := saveAssociationCheck(db, rel.Field)
if !(creatable || updatable) {
if !saveAssociationCheck(db, rel, selectColumns, restricted) {
continue
}
fieldType := rel.Field.IndirectFieldType.Elem()
isPtr := true
if fieldType.Kind() != reflect.Ptr {
isPtr = false
fieldType = reflect.PtrTo(fieldType)
}
elems := reflect.MakeSlice(reflect.SliceOf(fieldType), 0, 0)
appendToElems := func(v reflect.Value) {
if _, zero := rel.Field.ValueOf(v); !zero {
f := reflect.Indirect(rel.Field.ReflectValueOf(v))
for i := 0; i < f.Len(); i++ {
elem := f.Index(i)
for _, ref := range rel.References {
if ref.OwnPrimaryKey {
pv, _ := ref.PrimaryKey.ValueOf(v)
ref.ForeignKey.Set(elem, pv)
} else if ref.PrimaryValue != "" {
ref.ForeignKey.Set(elem, ref.PrimaryValue)
}
}
if _, isZero := rel.FieldSchema.PrioritizedPrimaryField.ValueOf(elem); isZero {
if isPtr {
elems = reflect.Append(elems, elem)
} else {
elems = reflect.Append(elems, elem.Addr())
}
}
}
}
}
switch db.Statement.ReflectValue.Kind() {
case reflect.Slice:
for i := 0; i < db.Statement.ReflectValue.Len(); i++ {
appendToElems(db.Statement.ReflectValue.Index(i))
}
case reflect.Struct:
appendToElems(db.Statement.ReflectValue)
}
if elems.Len() > 0 {
db.Session(&gorm.Session{}).Create(elems.Interface())
}
}
// Save Many2Many associations
for _, rel := range db.Statement.Schema.Relationships.Many2Many {
if !saveAssociationCheck(db, rel, selectColumns, restricted) {
continue
}
@ -126,7 +239,6 @@ func SaveAfterAssociations(db *gorm.DB) {
for i := 0; i < f.Len(); i++ {
elem := f.Index(i)
_, isZero := rel.FieldSchema.PrioritizedPrimaryField.ValueOf(elem)
for _, ref := range rel.References {
if ref.OwnPrimaryKey {
fv, _ := ref.PrimaryKey.ValueOf(db.Statement.ReflectValue)
@ -136,7 +248,7 @@ func SaveAfterAssociations(db *gorm.DB) {
}
}
if isZero && creatable {
if _, isZero := rel.FieldSchema.PrioritizedPrimaryField.ValueOf(elem); isZero {
if isPtr {
elems = reflect.Append(elems, elem)
} else {
@ -152,23 +264,19 @@ func SaveAfterAssociations(db *gorm.DB) {
}
}
}
func saveAssociationCheck(db *gorm.DB, field *schema.Field) (bool, bool, bool) {
creatable := field.Creatable
updatable := field.Updatable
saveRef := true
if value, ok := db.Get("gorm:association_autocreate"); creatable && ok {
creatable = utils.CheckTruth(value)
}
if value, ok := db.Get("gorm:association_autoupdate"); updatable && ok {
updatable = utils.CheckTruth(value)
func saveAssociationCheck(db *gorm.DB, rel *schema.Relationship, selectColumns map[string]bool, restricted bool) bool {
savable := true
if value, ok := db.Get("gorm:save_association"); ok {
savable = utils.CheckTruth(value)
}
if value, ok := db.Get("gorm:association_save_reference"); ok {
saveRef = utils.CheckTruth(value)
if savable {
if v, ok := selectColumns[rel.Name]; (ok && v) || (!ok && !restricted) {
return true
}
}
return creatable, updatable, saveRef
return false
}

11
callbacks/helper.go
View File

@ -37,11 +37,16 @@ func SelectAndOmitColumns(stmt *gorm.Statement, requireCreate, requireUpdate boo
}
if stmt.Schema != nil {
for _, field := range stmt.Schema.FieldsByDBName {
for _, field := range stmt.Schema.Fields {
name := field.DBName
if name == "" {
name = field.Name
}
if requireCreate && !field.Creatable {
results[field.DBName] = false
results[name] = false
} else if requireUpdate && !field.Updatable {
results[field.DBName] = false
results[name] = false
}
}
}

3
gorm.go
View File

@ -161,12 +161,13 @@ func (db *DB) AutoMigrate(dst ...interface{}) error {
}
// AddError add error to db
func (db *DB) AddError(err error) {
func (db *DB) AddError(err error) error {
if db.Error == nil {
db.Error = err
} else if err != nil {
db.Error = fmt.Errorf("%v; %w", db.Error, err)
}
return db.Error
}
func (db *DB) getInstance() *DB {