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Refactor Preload

This commit is contained in:
Jinzhu 2015-04-22 15:36:10 +08:00
parent 7ef8b06cb4
commit 7693c093a9
2 changed files with 16 additions and 18 deletions
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30
preload.go
View File

@ -106,10 +106,9 @@ func (scope *Scope) handleHasOnePreload(field *Field, conditions []interface{})
results := makeSlice(field.Struct.Type)
relation := field.Relationship
condition := fmt.Sprintf("%v IN (?)", scope.Quote(relation.ForeignDBName))
resultValues := reflect.Indirect(reflect.ValueOf(results))
// TODO: handle error?
scope.NewDB().Where(condition, primaryKeys).Find(results, conditions...)
scope.Err(scope.NewDB().Where(condition, primaryKeys).Find(results, conditions...).Error)
resultValues := reflect.Indirect(reflect.ValueOf(results))
for i := 0; i < resultValues.Len(); i++ {
result := resultValues.Index(i)
@ -123,8 +122,7 @@ func (scope *Scope) handleHasOnePreload(field *Field, conditions []interface{})
}
}
} else {
err := scope.SetColumn(field, result)
if err != nil {
if err := scope.SetColumn(field, result); err != nil {
scope.Err(err)
return
}
@ -142,9 +140,9 @@ func (scope *Scope) handleHasManyPreload(field *Field, conditions []interface{})
results := makeSlice(field.Struct.Type)
relation := field.Relationship
condition := fmt.Sprintf("%v IN (?)", scope.Quote(relation.ForeignDBName))
resultValues := reflect.Indirect(reflect.ValueOf(results))
scope.NewDB().Where(condition, primaryKeys).Find(results, conditions...)
scope.Err(scope.NewDB().Where(condition, primaryKeys).Find(results, conditions...).Error)
resultValues := reflect.Indirect(reflect.ValueOf(results))
if scope.IndirectValue().Kind() == reflect.Slice {
for i := 0; i < resultValues.Len(); i++ {
@ -173,10 +171,10 @@ func (scope *Scope) handleBelongsToPreload(field *Field, conditions []interface{
}
results := makeSlice(field.Struct.Type)
resultValues := reflect.Indirect(reflect.ValueOf(results))
associationPrimaryKey := scope.New(results).PrimaryField().Name
scope.NewDB().Where(primaryKeys).Find(results, conditions...)
scope.Err(scope.NewDB().Where(primaryKeys).Find(results, conditions...).Error)
resultValues := reflect.Indirect(reflect.ValueOf(results))
for i := 0; i < resultValues.Len(); i++ {
result := resultValues.Index(i)
@ -212,16 +210,16 @@ func (scope *Scope) getColumnsAsScope(column string) *Scope {
values := scope.IndirectValue()
switch values.Kind() {
case reflect.Slice:
model := values.Type().Elem()
if model.Kind() == reflect.Ptr {
model = model.Elem()
modelType := values.Type().Elem()
if modelType.Kind() == reflect.Ptr {
modelType = modelType.Elem()
}
fieldType, _ := model.FieldByName(column)
fieldStruct, _ := modelType.FieldByName(column)
var columns reflect.Value
if fieldType.Type.Kind() == reflect.Slice {
columns = reflect.New(reflect.SliceOf(reflect.PtrTo(fieldType.Type.Elem()))).Elem()
if fieldStruct.Type.Kind() == reflect.Slice {
columns = reflect.New(reflect.SliceOf(reflect.PtrTo(fieldStruct.Type.Elem()))).Elem()
} else {
columns = reflect.New(reflect.SliceOf(reflect.PtrTo(fieldType.Type))).Elem()
columns = reflect.New(reflect.SliceOf(reflect.PtrTo(fieldStruct.Type))).Elem()
}
for i := 0; i < values.Len(); i++ {
column := reflect.Indirect(values.Index(i)).FieldByName(column)

4
preload_test.go
View File

@ -156,7 +156,6 @@ func TestNestedPreload2(t *testing.T) {
}
want := Level3{
Name: "name",
Level2s: []Level2{
{
Level1s: []*Level1{
@ -211,7 +210,6 @@ func TestNestedPreload3(t *testing.T) {
}
want := Level3{
Name: "name",
Level2s: []Level2{
{Level1: Level1{Value: "value1"}},
{Level1: Level1{Value: "value2"}},
@ -368,6 +366,7 @@ func TestNestedPreload6(t *testing.T) {
if err := DB.Create(&want[0]).Error; err != nil {
panic(err)
}
want[1] = Level3{
Level2s: []Level2{
{
@ -432,6 +431,7 @@ func TestNestedPreload7(t *testing.T) {
if err := DB.Create(&want[0]).Error; err != nil {
panic(err)
}
want[1] = Level3{
Level2s: []Level2{
{Level1: Level1{Value: "value3"}},