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executors.go
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executors.go
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package pop
import (
"fmt"
"reflect"
"time"
"github.com/gobuffalo/pop/v6/associations"
"github.com/gobuffalo/pop/v6/columns"
"github.com/gobuffalo/pop/v6/logging"
"github.com/gobuffalo/validate/v3"
"github.com/gofrs/uuid"
)
// Reload fetch fresh data for a given model, using its ID.
func (c *Connection) Reload(model interface{}) error {
sm := NewModel(model, c.Context())
return sm.iterate(func(m *Model) error {
return c.Find(m.Value, m.ID())
})
}
// TODO: consider merging the following two methods.
// Exec runs the given query.
func (q *Query) Exec() error {
return q.Connection.timeFunc("Exec", func() error {
sql, args := q.ToSQL(nil)
if sql == "" {
return fmt.Errorf("empty query")
}
txlog(logging.SQL, q.Connection, sql, args...)
_, err := q.Connection.Store.Exec(sql, args...)
return err
})
}
// ExecWithCount runs the given query, and returns the amount of
// affected rows.
func (q *Query) ExecWithCount() (int, error) {
count := int64(0)
return int(count), q.Connection.timeFunc("Exec", func() error {
sql, args := q.ToSQL(nil)
if sql == "" {
return fmt.Errorf("empty query")
}
txlog(logging.SQL, q.Connection, sql, args...)
result, err := q.Connection.Store.Exec(sql, args...)
if err != nil {
return err
}
count, err = result.RowsAffected()
return err
})
}
// ValidateAndSave applies validation rules on the given entry, then save it
// if the validation succeed, excluding the given columns.
//
// If model is a slice, each item of the slice is validated then saved in the database.
func (c *Connection) ValidateAndSave(model interface{}, excludeColumns ...string) (*validate.Errors, error) {
sm := NewModel(model, c.Context())
if err := sm.beforeValidate(c); err != nil {
return nil, err
}
verrs, err := sm.validateSave(c)
if err != nil {
return verrs, err
}
if verrs.HasAny() {
return verrs, nil
}
return verrs, c.Save(model, excludeColumns...)
}
var emptyUUID = uuid.Nil.String()
// IsZeroOfUnderlyingType will check if the value of anything is the equal to the Zero value of that type.
func IsZeroOfUnderlyingType(x interface{}) bool {
return reflect.DeepEqual(x, reflect.Zero(reflect.TypeOf(x)).Interface())
}
// Save wraps the Create and Update methods. It executes a Create if no ID is provided with the entry;
// or issues an Update otherwise.
//
// If model is a slice, each item of the slice is saved in the database.
func (c *Connection) Save(model interface{}, excludeColumns ...string) error {
sm := NewModel(model, c.Context())
return sm.iterate(func(m *Model) error {
id, err := m.fieldByName("ID")
if err != nil {
return err
}
if IsZeroOfUnderlyingType(id.Interface()) {
return c.Create(m.Value, excludeColumns...)
}
return c.Update(m.Value, excludeColumns...)
})
}
// ValidateAndCreate applies validation rules on the given entry, then creates it
// if the validation succeed, excluding the given columns.
//
// If model is a slice, each item of the slice is validated then created in the database.
func (c *Connection) ValidateAndCreate(model interface{}, excludeColumns ...string) (*validate.Errors, error) {
sm := NewModel(model, c.Context())
isEager := c.eager
hasEagerFields := c.eagerFields
if err := sm.beforeValidate(c); err != nil {
return nil, err
}
verrs, err := sm.validateCreate(c)
if err != nil {
return verrs, err
}
if verrs.HasAny() {
return verrs, nil
}
if c.eager {
asos, err := associations.ForStruct(model, c.eagerFields...)
if err != nil {
return verrs, fmt.Errorf("could not retrieve associations: %w", err)
}
if len(asos) == 0 {
log(logging.Debug, "no associations found for given struct, disable eager mode")
c.disableEager()
return verrs, c.Create(model, excludeColumns...)
}
before := asos.AssociationsBeforeCreatable()
for index := range before {
i := before[index].BeforeInterface()
if i == nil {
continue
}
sm := NewModel(i, c.Context())
verrs, err := sm.validateAndOnlyCreate(c)
if err != nil || verrs.HasAny() {
return verrs, err
}
}
after := asos.AssociationsAfterCreatable()
for index := range after {
i := after[index].AfterInterface()
if i == nil {
continue
}
sm := NewModel(i, c.Context())
verrs, err := sm.validateAndOnlyCreate(c)
if err != nil || verrs.HasAny() {
return verrs, err
}
}
sm := NewModel(model, c.Context())
verrs, err = sm.validateCreate(c)
if err != nil || verrs.HasAny() {
return verrs, err
}
}
c.eager = isEager
c.eagerFields = hasEagerFields
return verrs, c.Create(model, excludeColumns...)
}
// Create add a new given entry to the database, excluding the given columns.
// It updates `created_at` and `updated_at` columns automatically.
//
// If model is a slice, each item of the slice is created in the database.
//
// Create support two modes:
// * Flat (default): Associate existing nested objects only. NO creation or update of nested objects.
// * Eager: Associate existing nested objects and create non-existent objects. NO change to existing objects.
func (c *Connection) Create(model interface{}, excludeColumns ...string) error {
var isEager = c.eager
c.disableEager()
sm := NewModel(model, c.Context())
return sm.iterate(func(m *Model) error {
return c.timeFunc("Create", func() error {
var localIsEager = isEager
asos, err := associations.ForStruct(m.Value, c.eagerFields...)
if err != nil {
return fmt.Errorf("could not retrieve associations: %w", err)
}
if localIsEager && len(asos) == 0 {
// No association, fallback to non-eager mode.
localIsEager = false
}
if err = m.beforeSave(c); err != nil {
return err
}
if err = m.beforeCreate(c); err != nil {
return err
}
processAssoc := len(asos) > 0
if processAssoc {
before := asos.AssociationsBeforeCreatable()
for index := range before {
i := before[index].BeforeInterface()
if i == nil {
continue
}
if localIsEager {
sm := NewModel(i, c.Context())
err = sm.iterate(func(m *Model) error {
id, err := m.fieldByName("ID")
if err != nil {
return err
}
if IsZeroOfUnderlyingType(id.Interface()) {
return c.Create(m.Value)
}
return nil
})
if err != nil {
return err
}
}
err = before[index].BeforeSetup()
if err != nil {
return err
}
}
}
tn := m.TableName()
cols := m.Columns()
if tn == sm.TableName() {
cols.Remove(excludeColumns...)
}
now := nowFunc().Truncate(time.Microsecond)
m.setUpdatedAt(now)
m.setCreatedAt(now)
if err = c.Dialect.Create(c, m, cols); err != nil {
return err
}
if processAssoc {
after := asos.AssociationsAfterCreatable()
for index := range after {
if localIsEager {
err = after[index].AfterSetup()
if err != nil {
return err
}
i := after[index].AfterInterface()
if i == nil {
continue
}
sm := NewModel(i, c.Context())
err = sm.iterate(func(m *Model) error {
fbn, err := m.fieldByName("ID")
if err != nil {
return err
}
id := fbn.Interface()
if IsZeroOfUnderlyingType(id) {
return c.Create(m.Value)
}
exists, errE := Q(c).Where(m.WhereID(), id).Exists(i)
if errE != nil || !exists {
return c.Create(m.Value)
}
return nil
})
if err != nil {
return err
}
}
stm := after[index].AfterProcess()
if c.TX != nil && !stm.Empty() {
err := c.RawQuery(c.Dialect.TranslateSQL(stm.Statement), stm.Args...).Exec()
if err != nil {
return err
}
}
}
stms := asos.AssociationsCreatableStatement()
for index := range stms {
statements := stms[index].Statements()
for _, stm := range statements {
err := c.RawQuery(c.Dialect.TranslateSQL(stm.Statement), stm.Args...).Exec()
if err != nil {
return err
}
}
}
}
if err = m.afterCreate(c); err != nil {
return err
}
return m.afterSave(c)
})
})
}
// ValidateAndUpdate applies validation rules on the given entry, then update it
// if the validation succeed, excluding the given columns.
//
// If model is a slice, each item of the slice is validated then updated in the database.
func (c *Connection) ValidateAndUpdate(model interface{}, excludeColumns ...string) (*validate.Errors, error) {
sm := NewModel(model, c.Context())
if err := sm.beforeValidate(c); err != nil {
return nil, err
}
verrs, err := sm.validateUpdate(c)
if err != nil {
return verrs, err
}
if verrs.HasAny() {
return verrs, nil
}
return verrs, c.Update(model, excludeColumns...)
}
// Update writes changes from an entry to the database, excluding the given columns.
// It updates the `updated_at` column automatically.
//
// If model is a slice, each item of the slice is updated in the database.
func (c *Connection) Update(model interface{}, excludeColumns ...string) error {
sm := NewModel(model, c.Context())
return sm.iterate(func(m *Model) error {
return c.timeFunc("Update", func() error {
var err error
if err = m.beforeSave(c); err != nil {
return err
}
if err = m.beforeUpdate(c); err != nil {
return err
}
tn := m.TableName()
cols := columns.ForStructWithAlias(model, tn, m.As, m.IDField())
cols.Remove(m.IDField(), "created_at")
if tn == sm.TableName() {
cols.Remove(excludeColumns...)
}
now := nowFunc().Truncate(time.Microsecond)
m.setUpdatedAt(now)
if err = c.Dialect.Update(c, m, cols); err != nil {
return err
}
if err = m.afterUpdate(c); err != nil {
return err
}
return m.afterSave(c)
})
})
}
// UpdateQuery updates all rows matched by the query. The new values are read
// from the first argument, which must be a struct. The column names to be
// updated must be listed explicitly in subsequent arguments. The ID and
// CreatedAt columns are never updated. The UpdatedAt column is updated
// automatically.
//
// UpdateQuery does not execute (before|after)(Create|Update|Save) callbacks.
//
// Calling UpdateQuery with no columnNames will result in only the UpdatedAt
// column being updated.
func (q *Query) UpdateQuery(model interface{}, columnNames ...string) (int64, error) {
sm := NewModel(model, q.Connection.Context())
modelKind := reflect.TypeOf(reflect.Indirect(reflect.ValueOf(model))).Kind()
if modelKind != reflect.Struct {
return 0, fmt.Errorf("model must be a struct; got %s", modelKind)
}
cols := columns.NewColumnsWithAlias(sm.TableName(), sm.As, sm.IDField())
cols.Add(columnNames...)
if _, err := sm.fieldByName("UpdatedAt"); err == nil {
cols.Add("updated_at")
}
cols.Remove(sm.IDField(), "created_at")
now := nowFunc().Truncate(time.Microsecond)
sm.setUpdatedAt(now)
return q.Connection.Dialect.UpdateQuery(q.Connection, sm, cols, *q)
}
// UpdateColumns writes changes from an entry to the database, including only the given columns
// or all columns if no column names are provided.
// It updates the `updated_at` column automatically if you include `updated_at` in columnNames.
//
// If model is a slice, each item of the slice is updated in the database.
func (c *Connection) UpdateColumns(model interface{}, columnNames ...string) error {
sm := NewModel(model, c.Context())
return sm.iterate(func(m *Model) error {
return c.timeFunc("Update", func() error {
var err error
if err = m.beforeSave(c); err != nil {
return err
}
if err = m.beforeUpdate(c); err != nil {
return err
}
tn := m.TableName()
cols := columns.Columns{}
if len(columnNames) > 0 && tn == sm.TableName() {
cols = columns.NewColumnsWithAlias(tn, m.As, sm.IDField())
cols.Add(columnNames...)
} else {
cols = columns.ForStructWithAlias(model, tn, m.As, m.IDField())
}
cols.Remove("id", "created_at")
now := nowFunc().Truncate(time.Microsecond)
m.setUpdatedAt(now)
if err = c.Dialect.Update(c, m, cols); err != nil {
return err
}
if err = m.afterUpdate(c); err != nil {
return err
}
return m.afterSave(c)
})
})
}
// Destroy deletes a given entry from the database.
//
// If model is a slice, each item of the slice is deleted from the database.
func (c *Connection) Destroy(model interface{}) error {
sm := NewModel(model, c.Context())
return sm.iterate(func(m *Model) error {
return c.timeFunc("Destroy", func() error {
var err error
if err = m.beforeDestroy(c); err != nil {
return err
}
if err = c.Dialect.Destroy(c, m); err != nil {
return err
}
return m.afterDestroy(c)
})
})
}
func (q *Query) Delete(model interface{}) error {
q.Operation = Delete
return q.Connection.timeFunc("Delete", func() error {
m := NewModel(model, q.Connection.Context())
err := q.Connection.Dialect.Delete(q.Connection, m, *q)
if err != nil {
return err
}
return m.afterDestroy(q.Connection)
})
}