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Refactor association Replace

This commit is contained in:
Jinzhu 2015-12-25 20:43:51 +08:00
parent 93b512be47
commit f13dcd8bc0
2 changed files with 55 additions and 23 deletions
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74
association.go
View File

@ -86,10 +86,18 @@ func (association *Association) Replace(values ...interface{}) *Association {
scope := association.Scope
field := association.Field.Field
// get old primary keys
oldPrimaryKeys := association.getPrimaryKeys(relationship.AssociationForeignFieldNames, field.Interface())
// append new values
association.Field.Set(reflect.Zero(association.Field.Field.Type()))
association.Append(values...)
newPrimaryKeys := association.getPrimaryKeys(relationship.AssociationForeignFieldNames, field.Interface())
// get new primary keys
var newPrimaryKeys [][]interface{}
if len(values) > 0 {
newPrimaryKeys = association.getPrimaryKeys(relationship.AssociationForeignFieldNames, field.Interface())
}
var addedPrimaryKeys = [][]interface{}{}
for _, newKey := range newPrimaryKeys {
@ -111,25 +119,49 @@ func (association *Association) Replace(values ...interface{}) *Association {
query := scope.NewDB()
var foreignKeyMap = map[string]interface{}{}
for idx, foreignKey := range relationship.ForeignDBNames {
foreignKeyMap[foreignKey] = nil
if field, ok := scope.FieldByName(relationship.AssociationForeignFieldNames[idx]); ok {
query = query.Where(fmt.Sprintf("%v = ?", scope.Quote(foreignKey)), field.Field.Interface())
if relationship.Kind == "belongs_to" {
for idx, foreignKey := range relationship.AssociationForeignDBNames {
if field, ok := scope.FieldByName(relationship.AssociationForeignFieldNames[idx]); ok {
query = query.Where(fmt.Sprintf("%v = ?", scope.Quote(foreignKey)), field.Field.Interface())
}
}
}
if len(addedPrimaryKeys) > 0 {
sql := fmt.Sprintf("%v NOT IN (%v)", toQueryCondition(scope, relationship.AssociationForeignDBNames), toQueryMarks(addedPrimaryKeys))
query = query.Where(sql, toQueryValues(addedPrimaryKeys)...)
}
for _, foreignKey := range relationship.ForeignDBNames {
foreignKeyMap[foreignKey] = nil
}
if relationship.Kind == "many_to_many" {
association.setErr(relationship.JoinTableHandler.Delete(relationship.JoinTableHandler, query, relationship))
} else if relationship.Kind == "belongs_to" {
association.setErr(query.Model(scope.Value).UpdateColumn(foreignKeyMap).Error)
} else if relationship.Kind == "has_one" || relationship.Kind == "has_many" {
fieldValue := reflect.New(association.Field.Field.Type()).Interface()
association.setErr(query.Model(fieldValue).UpdateColumn(foreignKeyMap).Error)
if len(addedPrimaryKeys) > 0 {
sql := fmt.Sprintf("%v NOT IN (%v)", toQueryCondition(scope, relationship.ForeignDBNames), toQueryMarks(addedPrimaryKeys))
query = query.Where(sql, toQueryValues(addedPrimaryKeys)...)
}
modelValue := scope.Value
// if replacing with a new value, don't reset current foreign key
// if clearing foreign value, then reset the foreign key to null
if len(values) > 0 {
modelValue = reflect.New(scope.GetModelStruct().ModelType).Interface()
}
association.setErr(query.Model(modelValue).UpdateColumn(foreignKeyMap).Error)
} else {
for idx, foreignKey := range relationship.ForeignDBNames {
foreignKeyMap[foreignKey] = nil
if field, ok := scope.FieldByName(relationship.AssociationForeignFieldNames[idx]); ok {
query = query.Where(fmt.Sprintf("%v = ?", scope.Quote(foreignKey)), field.Field.Interface())
}
}
if len(addedPrimaryKeys) > 0 {
sql := fmt.Sprintf("%v NOT IN (%v)", toQueryCondition(scope, relationship.AssociationForeignDBNames), toQueryMarks(addedPrimaryKeys))
query = query.Where(sql, toQueryValues(addedPrimaryKeys)...)
}
if relationship.Kind == "many_to_many" {
association.setErr(relationship.JoinTableHandler.Delete(relationship.JoinTableHandler, query, relationship))
} else if relationship.Kind == "has_one" || relationship.Kind == "has_many" {
fieldValue := reflect.New(association.Field.Field.Type()).Interface()
association.setErr(query.Model(fieldValue).UpdateColumn(foreignKeyMap).Error)
}
}
return association
}
@ -184,8 +216,8 @@ func (association *Association) Delete(values ...interface{}) *Association {
}
primaryKeys := association.getPrimaryKeys(relationship.AssociationForeignFieldNames, values...)
sql := fmt.Sprintf("%v IN (%v)", toQueryCondition(scope, relationship.ForeignDBNames), toQueryMarks(primaryKeys))
association.setErr(query.Model(scope.Value).Where(sql, toQueryValues(primaryKeys)...).UpdateColumn(foreignKeyMap).Error)
association.setErr(query.Model(scope.Value).Where(sql, toQueryValues(primaryKeys)...).UpdateColumn(foreignKeyMap).Error)
} else if relationship.Kind == "has_one" || relationship.Kind == "has_many" {
var foreignKeyMap = map[string]interface{}{}
for _, foreignKey := range relationship.ForeignDBNames {
@ -250,8 +282,7 @@ func (association *Association) Count() int {
return count
}
func (association *Association) getPrimaryKeys(columns []string, values ...interface{}) [][]interface{} {
results := [][]interface{}{}
func (association *Association) getPrimaryKeys(columns []string, values ...interface{}) (results [][]interface{}) {
scope := association.Scope
for _, value := range values {
@ -283,7 +314,8 @@ func (association *Association) getPrimaryKeys(columns []string, values ...inter
results = append(results, primaryKeys)
}
}
return results
return
}
func toQueryMarks(primaryValues [][]interface{}) string {

4
association_test.go
View File

@ -106,7 +106,7 @@ func TestBelongsTo(t *testing.T) {
t.Errorf("Should find category after append")
}
DB.Model(&post).Debug().Association("Category").Clear()
DB.Model(&post).Association("Category").Clear()
if !DB.Model(&post).Related(&Category{}).RecordNotFound() {
t.Errorf("Should not find any category after Clear")
@ -179,7 +179,7 @@ func TestHasMany(t *testing.T) {
}
// Replace
DB.Model(&Post{Id: 999}).Debug().Association("Comments").Replace()
DB.Model(&Post{Id: 999}).Association("Comments").Replace()
var comments4 []Comment
DB.Model(&post).Related(&comments4)