func (guo *GroupUpdateOne) Select(field string, fields ...string) *GroupUpdateOne {
	guo.fields = append([]string{field}, fields...)
	return guo
}
Select allows selecting one or more fields (columns) of the returned entity.
The default is selecting all fields defined in the entity schema.
package ent
import (
	"context"
	"fmt"
	"entgo.io/contrib/entproto/internal/todo/ent/group"
	"entgo.io/contrib/entproto/internal/todo/ent/predicate"
	"entgo.io/contrib/entproto/internal/todo/ent/user"
	"entgo.io/ent/dialect/sql"
	"entgo.io/ent/dialect/sql/sqlgraph"
	"entgo.io/ent/schema/field"
)
type GroupUpdate struct {
	config
	hooks    []Hook
	mutation *GroupMutation
}
func (gu *GroupUpdate) Where(ps ...predicate.Group) *GroupUpdate {
	gu.mutation.Where(ps...)
	return gu
}
func (gu *GroupUpdate) SetName(s string) *GroupUpdate {
	gu.mutation.SetName(s)
	return gu
}
func (gu *GroupUpdate) AddUserIDs(ids ...int) *GroupUpdate {
	gu.mutation.AddUserIDs(ids...)
	return gu
}
func (gu *GroupUpdate) AddUsers(u ...*User) *GroupUpdate {
	ids := make([]int, len(u))
	for i := range u {
		ids[i] = u[i].ID
	}
	return gu.AddUserIDs(ids...)
}
func (gu *GroupUpdate) Mutation() *GroupMutation {
	return gu.mutation
}
func (gu *GroupUpdate) ClearUsers() *GroupUpdate {
	gu.mutation.ClearUsers()
	return gu
}
func (gu *GroupUpdate) RemoveUserIDs(ids ...int) *GroupUpdate {
	gu.mutation.RemoveUserIDs(ids...)
	return gu
}
func (gu *GroupUpdate) RemoveUsers(u ...*User) *GroupUpdate {
	ids := make([]int, len(u))
	for i := range u {
		ids[i] = u[i].ID
	}
	return gu.RemoveUserIDs(ids...)
}
func (gu *GroupUpdate) Save(ctx context.Context) (int, error) {
	var (
		err      error
		affected int
	)
	if len(gu.hooks) == 0 {
		affected, err = gu.sqlSave(ctx)
	} else {
		var mut Mutator = MutateFunc(func(ctx context.Context, m Mutation) (Value, error) {
			mutation, ok := m.(*GroupMutation)
			if !ok {
				return nil, fmt.Errorf("unexpected mutation type %T", m)
			}
			gu.mutation = mutation
			affected, err = gu.sqlSave(ctx)
			mutation.done = true
			return affected, err
		})
		for i := len(gu.hooks) - 1; i >= 0; i-- {
			if gu.hooks[i] == nil {
				return 0, fmt.Errorf("ent: uninitialized hook (forgotten import ent/runtime?)")
			}
			mut = gu.hooks[i](mut)
		}
		if _, err := mut.Mutate(ctx, gu.mutation); err != nil {
			return 0, err
		}
	}
	return affected, err
}
func (gu *GroupUpdate) SaveX(ctx context.Context) int {
	affected, err := gu.Save(ctx)
	if err != nil {
		panic(err)
	}
	return affected
}
func (gu *GroupUpdate) Exec(ctx context.Context) error {
	_, err := gu.Save(ctx)
	return err
}
func (gu *GroupUpdate) ExecX(ctx context.Context) {
	if err := gu.Exec(ctx); err != nil {
		panic(err)
	}
}
func (gu *GroupUpdate) sqlSave(ctx context.Context) (n int, err error) {
	_spec := &sqlgraph.UpdateSpec{
		Node: &sqlgraph.NodeSpec{
			Table:   group.Table,
			Columns: group.Columns,
			ID: &sqlgraph.FieldSpec{
				Type:   field.TypeInt,
				Column: group.FieldID,
			},
		},
	}
	if ps := gu.mutation.predicates; len(ps) > 0 {
		_spec.Predicate = func(selector *sql.Selector) {
			for i := range ps {
				ps[i](selector)
			}
		}
	}
	if value, ok := gu.mutation.Name(); ok {
		_spec.Fields.Set = append(_spec.Fields.Set, &sqlgraph.FieldSpec{
			Type:   field.TypeString,
			Value:  value,
			Column: group.FieldName,
		})
	}
	if gu.mutation.UsersCleared() {
		edge := &sqlgraph.EdgeSpec{
			Rel:     sqlgraph.O2M,
			Inverse: true,
			Table:   group.UsersTable,
			Columns: []string{group.UsersColumn},
			Bidi:    false,
			Target: &sqlgraph.EdgeTarget{
				IDSpec: &sqlgraph.FieldSpec{
					Type:   field.TypeInt,
					Column: user.FieldID,
				},
			},
		}
		_spec.Edges.Clear = append(_spec.Edges.Clear, edge)
	}
	if nodes := gu.mutation.RemovedUsersIDs(); len(nodes) > 0 && !gu.mutation.UsersCleared() {
		edge := &sqlgraph.EdgeSpec{
			Rel:     sqlgraph.O2M,
			Inverse: true,
			Table:   group.UsersTable,
			Columns: []string{group.UsersColumn},
			Bidi:    false,
			Target: &sqlgraph.EdgeTarget{
				IDSpec: &sqlgraph.FieldSpec{
					Type:   field.TypeInt,
					Column: user.FieldID,
				},
			},
		}
		for _, k := range nodes {
			edge.Target.Nodes = append(edge.Target.Nodes, k)
		}
		_spec.Edges.Clear = append(_spec.Edges.Clear, edge)
	}
	if nodes := gu.mutation.UsersIDs(); len(nodes) > 0 {
		edge := &sqlgraph.EdgeSpec{
			Rel:     sqlgraph.O2M,
			Inverse: true,
			Table:   group.UsersTable,
			Columns: []string{group.UsersColumn},
			Bidi:    false,
			Target: &sqlgraph.EdgeTarget{
				IDSpec: &sqlgraph.FieldSpec{
					Type:   field.TypeInt,
					Column: user.FieldID,
				},
			},
		}
		for _, k := range nodes {
			edge.Target.Nodes = append(edge.Target.Nodes, k)
		}
		_spec.Edges.Add = append(_spec.Edges.Add, edge)
	}
	if n, err = sqlgraph.UpdateNodes(ctx, gu.driver, _spec); err != nil {
		if _, ok := err.(*sqlgraph.NotFoundError); ok {
			err = &NotFoundError{group.Label}
		} else if sqlgraph.IsConstraintError(err) {
			err = &ConstraintError{err.Error(), err}
		}
		return 0, err
	}
	return n, nil
}
type GroupUpdateOne struct {
	config
	fields   []string
	hooks    []Hook
	mutation *GroupMutation
}
func (guo *GroupUpdateOne) SetName(s string) *GroupUpdateOne {
	guo.mutation.SetName(s)
	return guo
}
func (guo *GroupUpdateOne) AddUserIDs(ids ...int) *GroupUpdateOne {
	guo.mutation.AddUserIDs(ids...)
	return guo
}
func (guo *GroupUpdateOne) AddUsers(u ...*User) *GroupUpdateOne {
	ids := make([]int, len(u))
	for i := range u {
		ids[i] = u[i].ID
	}
	return guo.AddUserIDs(ids...)
}
func (guo *GroupUpdateOne) Mutation() *GroupMutation {
	return guo.mutation
}
func (guo *GroupUpdateOne) ClearUsers() *GroupUpdateOne {
	guo.mutation.ClearUsers()
	return guo
}
func (guo *GroupUpdateOne) RemoveUserIDs(ids ...int) *GroupUpdateOne {
	guo.mutation.RemoveUserIDs(ids...)
	return guo
}
func (guo *GroupUpdateOne) RemoveUsers(u ...*User) *GroupUpdateOne {
	ids := make([]int, len(u))
	for i := range u {
		ids[i] = u[i].ID
	}
	return guo.RemoveUserIDs(ids...)
}