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callbacks.go
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callbacks.go
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package pop
import (
"reflect"
"golang.org/x/sync/errgroup"
)
// AfterFindable callback will be called after a record, or records,
// has been retrieved from the database.
type AfterFindable interface {
AfterFind(*Connection) error
}
// AfterEagerFindable callback will be called after a record, or records,
// has been retrieved from the database and their associations have been
// eagerly loaded.
type AfterEagerFindable interface {
AfterEagerFind(*Connection) error
}
func (m *Model) afterFind(c *Connection, eager bool) error {
if eager {
if x, ok := m.Value.(AfterEagerFindable); ok {
if err := x.AfterEagerFind(c); err != nil {
return err
}
}
} else {
if x, ok := m.Value.(AfterFindable); ok {
if err := x.AfterFind(c); err != nil {
return err
}
}
}
// if the "model" is a slice/array we want
// to loop through each of the elements in the collection
// and call AfterFind on them if they exist.
rv := reflect.Indirect(reflect.ValueOf(m.Value))
kind := rv.Kind()
if kind != reflect.Slice && kind != reflect.Array {
return nil
}
wg := &errgroup.Group{}
for i := 0; i < rv.Len(); i++ {
elem := rv.Index(i).Addr()
if eager {
if x, ok := elem.Interface().(AfterEagerFindable); ok {
wg.Go(func() error {
return x.AfterEagerFind(c)
})
}
} else {
if x, ok := elem.Interface().(AfterFindable); ok {
wg.Go(func() error {
return x.AfterFind(c)
})
}
}
}
return wg.Wait()
}
// BeforeSaveable callback will be called before a record is
// either created or updated in the database.
type BeforeSaveable interface {
BeforeSave(*Connection) error
}
func (m *Model) beforeSave(c *Connection) error {
if x, ok := m.Value.(BeforeSaveable); ok {
return x.BeforeSave(c)
}
return nil
}
// BeforeCreateable callback will be called before a record is
// created in the database.
type BeforeCreateable interface {
BeforeCreate(*Connection) error
}
func (m *Model) beforeCreate(c *Connection) error {
if x, ok := m.Value.(BeforeCreateable); ok {
return x.BeforeCreate(c)
}
return nil
}
// BeforeUpdateable callback will be called before a record is
// updated in the database.
type BeforeUpdateable interface {
BeforeUpdate(*Connection) error
}
func (m *Model) beforeUpdate(c *Connection) error {
if x, ok := m.Value.(BeforeUpdateable); ok {
return x.BeforeUpdate(c)
}
return nil
}
// BeforeDestroyable callback will be called before a record is
// destroyed in the database.
type BeforeDestroyable interface {
BeforeDestroy(*Connection) error
}
func (m *Model) beforeDestroy(c *Connection) error {
if x, ok := m.Value.(BeforeDestroyable); ok {
return x.BeforeDestroy(c)
}
return nil
}
// BeforeValidateable callback will be called before a record is
// validated during
// ValidateAndCreate, ValidateAndUpdate, or ValidateAndSave
type BeforeValidateable interface {
BeforeValidate(*Connection) error
}
func (m *Model) beforeValidate(c *Connection) error {
if x, ok := m.Value.(BeforeValidateable); ok {
return x.BeforeValidate(c)
}
return nil
}
// AfterDestroyable callback will be called after a record is
// destroyed in the database.
type AfterDestroyable interface {
AfterDestroy(*Connection) error
}
func (m *Model) afterDestroy(c *Connection) error {
if x, ok := m.Value.(AfterDestroyable); ok {
return x.AfterDestroy(c)
}
return nil
}
// AfterUpdateable callback will be called after a record is
// updated in the database.
type AfterUpdateable interface {
AfterUpdate(*Connection) error
}
func (m *Model) afterUpdate(c *Connection) error {
if x, ok := m.Value.(AfterUpdateable); ok {
return x.AfterUpdate(c)
}
return nil
}
// AfterCreateable callback will be called after a record is
// created in the database.
type AfterCreateable interface {
AfterCreate(*Connection) error
}
func (m *Model) afterCreate(c *Connection) error {
if x, ok := m.Value.(AfterCreateable); ok {
return x.AfterCreate(c)
}
return nil
}
// AfterSaveable callback will be called after a record is
// either created or updated in the database.
type AfterSaveable interface {
AfterSave(*Connection) error
}
func (m *Model) afterSave(c *Connection) error {
if x, ok := m.Value.(AfterSaveable); ok {
return x.AfterSave(c)
}
return nil
}