entc/gen: remove multi storage support

entc/integration/gremlin/ent/node_query.go

@@ -0,0 +1,626 @@
+// Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
+// This source code is licensed under the Apache 2.0 license found
+// in the LICENSE file in the root directory of this source tree.
+
+// Code generated (@generated) by entc, DO NOT EDIT.
+
+package ent
+
+import (
+	"context"
+	"errors"
+	"math"
+
+	"github.com/facebookincubator/ent/dialect/gremlin"
+	"github.com/facebookincubator/ent/dialect/gremlin/graph/dsl"
+	"github.com/facebookincubator/ent/dialect/gremlin/graph/dsl/__"
+	"github.com/facebookincubator/ent/dialect/gremlin/graph/dsl/g"
+	"github.com/facebookincubator/ent/entc/integration/gremlin/ent/node"
+	"github.com/facebookincubator/ent/entc/integration/gremlin/ent/predicate"
+)
+
+// NodeQuery is the builder for querying Node entities.
+type NodeQuery struct {
+	config
+	limit      *int
+	offset     *int
+	order      []Order
+	unique     []string
+	predicates []predicate.Node
+	// intermediate query.
+	gremlin *dsl.Traversal
+}
+
+// Where adds a new predicate for the builder.
+func (nq *NodeQuery) Where(ps ...predicate.Node) *NodeQuery {
+	nq.predicates = append(nq.predicates, ps...)
+	return nq
+}
+
+// Limit adds a limit step to the query.
+func (nq *NodeQuery) Limit(limit int) *NodeQuery {
+	nq.limit = &limit
+	return nq
+}
+
+// Offset adds an offset step to the query.
+func (nq *NodeQuery) Offset(offset int) *NodeQuery {
+	nq.offset = &offset
+	return nq
+}
+
+// Order adds an order step to the query.
+func (nq *NodeQuery) Order(o ...Order) *NodeQuery {
+	nq.order = append(nq.order, o...)
+	return nq
+}
+
+// QueryPrev chains the current query on the prev edge.
+func (nq *NodeQuery) QueryPrev() *NodeQuery {
+	query := &NodeQuery{config: nq.config}
+	gremlin := nq.gremlinQuery()
+	query.gremlin = gremlin.InE(node.NextLabel).OutV()
+	return query
+}
+
+// QueryNext chains the current query on the next edge.
+func (nq *NodeQuery) QueryNext() *NodeQuery {
+	query := &NodeQuery{config: nq.config}
+	gremlin := nq.gremlinQuery()
+	query.gremlin = gremlin.OutE(node.NextLabel).InV()
+	return query
+}
+
+// First returns the first Node entity in the query. Returns *ErrNotFound when no node was found.
+func (nq *NodeQuery) First(ctx context.Context) (*Node, error) {
+	ns, err := nq.Limit(1).All(ctx)
+	if err != nil {
+		return nil, err
+	}
+	if len(ns) == 0 {
+		return nil, &ErrNotFound{node.Label}
+	}
+	return ns[0], nil
+}
+
+// FirstX is like First, but panics if an error occurs.
+func (nq *NodeQuery) FirstX(ctx context.Context) *Node {
+	n, err := nq.First(ctx)
+	if err != nil && !IsNotFound(err) {
+		panic(err)
+	}
+	return n
+}
+
+// FirstID returns the first Node id in the query. Returns *ErrNotFound when no id was found.
+func (nq *NodeQuery) FirstID(ctx context.Context) (id string, err error) {
+	var ids []string
+	if ids, err = nq.Limit(1).IDs(ctx); err != nil {
+		return
+	}
+	if len(ids) == 0 {
+		err = &ErrNotFound{node.Label}
+		return
+	}
+	return ids[0], nil
+}
+
+// FirstXID is like FirstID, but panics if an error occurs.
+func (nq *NodeQuery) FirstXID(ctx context.Context) string {
+	id, err := nq.FirstID(ctx)
+	if err != nil && !IsNotFound(err) {
+		panic(err)
+	}
+	return id
+}
+
+// Only returns the only Node entity in the query, returns an error if not exactly one entity was returned.
+func (nq *NodeQuery) Only(ctx context.Context) (*Node, error) {
+	ns, err := nq.Limit(2).All(ctx)
+	if err != nil {
+		return nil, err
+	}
+	switch len(ns) {
+	case 1:
+		return ns[0], nil
+	case 0:
+		return nil, &ErrNotFound{node.Label}
+	default:
+		return nil, &ErrNotSingular{node.Label}
+	}
+}
+
+// OnlyX is like Only, but panics if an error occurs.
+func (nq *NodeQuery) OnlyX(ctx context.Context) *Node {
+	n, err := nq.Only(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return n
+}
+
+// OnlyID returns the only Node id in the query, returns an error if not exactly one id was returned.
+func (nq *NodeQuery) OnlyID(ctx context.Context) (id string, err error) {
+	var ids []string
+	if ids, err = nq.Limit(2).IDs(ctx); err != nil {
+		return
+	}
+	switch len(ids) {
+	case 1:
+		id = ids[0]
+	case 0:
+		err = &ErrNotFound{node.Label}
+	default:
+		err = &ErrNotSingular{node.Label}
+	}
+	return
+}
+
+// OnlyXID is like OnlyID, but panics if an error occurs.
+func (nq *NodeQuery) OnlyXID(ctx context.Context) string {
+	id, err := nq.OnlyID(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return id
+}
+
+// All executes the query and returns a list of Nodes.
+func (nq *NodeQuery) All(ctx context.Context) ([]*Node, error) {
+	return nq.gremlinAll(ctx)
+}
+
+// AllX is like All, but panics if an error occurs.
+func (nq *NodeQuery) AllX(ctx context.Context) []*Node {
+	ns, err := nq.All(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return ns
+}
+
+// IDs executes the query and returns a list of Node ids.
+func (nq *NodeQuery) IDs(ctx context.Context) ([]string, error) {
+	var ids []string
+	if err := nq.Select(node.FieldID).Scan(ctx, &ids); err != nil {
+		return nil, err
+	}
+	return ids, nil
+}
+
+// IDsX is like IDs, but panics if an error occurs.
+func (nq *NodeQuery) IDsX(ctx context.Context) []string {
+	ids, err := nq.IDs(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return ids
+}
+
+// Count returns the count of the given query.
+func (nq *NodeQuery) Count(ctx context.Context) (int, error) {
+	return nq.gremlinCount(ctx)
+}
+
+// CountX is like Count, but panics if an error occurs.
+func (nq *NodeQuery) CountX(ctx context.Context) int {
+	count, err := nq.Count(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return count
+}
+
+// Exist returns true if the query has elements in the graph.
+func (nq *NodeQuery) Exist(ctx context.Context) (bool, error) {
+	return nq.gremlinExist(ctx)
+}
+
+// ExistX is like Exist, but panics if an error occurs.
+func (nq *NodeQuery) ExistX(ctx context.Context) bool {
+	exist, err := nq.Exist(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return exist
+}
+
+// Clone returns a duplicate of the query builder, including all associated steps. It can be
+// used to prepare common query builders and use them differently after the clone is made.
+func (nq *NodeQuery) Clone() *NodeQuery {
+	return &NodeQuery{
+		config:     nq.config,
+		limit:      nq.limit,
+		offset:     nq.offset,
+		order:      append([]Order{}, nq.order...),
+		unique:     append([]string{}, nq.unique...),
+		predicates: append([]predicate.Node{}, nq.predicates...),
+		// clone intermediate query.
+		gremlin: nq.gremlin.Clone(),
+	}
+}
+
+// GroupBy used to group vertices by one or more fields/columns.
+// It is often used with aggregate functions, like: count, max, mean, min, sum.
+//
+// Example:
+//
+//	var v []struct {
+//		Value int `json:"value,omitempty"`
+//		Count int `json:"count,omitempty"`
+//	}
+//
+//	client.Node.Query().
+//		GroupBy(node.FieldValue).
+//		Aggregate(ent.Count()).
+//		Scan(ctx, &v)
+//
+func (nq *NodeQuery) GroupBy(field string, fields ...string) *NodeGroupBy {
+	group := &NodeGroupBy{config: nq.config}
+	group.fields = append([]string{field}, fields...)
+	group.gremlin = nq.gremlinQuery()
+	return group
+}
+
+// Select one or more fields from the given query.
+//
+// Example:
+//
+//	var v []struct {
+//		Value int `json:"value,omitempty"`
+//	}
+//
+//	client.Node.Query().
+//		Select(node.FieldValue).
+//		Scan(ctx, &v)
+//
+func (nq *NodeQuery) Select(field string, fields ...string) *NodeSelect {
+	selector := &NodeSelect{config: nq.config}
+	selector.fields = append([]string{field}, fields...)
+	selector.gremlin = nq.gremlinQuery()
+	return selector
+}
+
+func (nq *NodeQuery) gremlinAll(ctx context.Context) ([]*Node, error) {
+	res := &gremlin.Response{}
+	query, bindings := nq.gremlinQuery().ValueMap(true).Query()
+	if err := nq.driver.Exec(ctx, query, bindings, res); err != nil {
+		return nil, err
+	}
+	var ns Nodes
+	if err := ns.FromResponse(res); err != nil {
+		return nil, err
+	}
+	ns.config(nq.config)
+	return ns, nil
+}
+
+func (nq *NodeQuery) gremlinCount(ctx context.Context) (int, error) {
+	res := &gremlin.Response{}
+	query, bindings := nq.gremlinQuery().Count().Query()
+	if err := nq.driver.Exec(ctx, query, bindings, res); err != nil {
+		return 0, err
+	}
+	return res.ReadInt()
+}
+
+func (nq *NodeQuery) gremlinExist(ctx context.Context) (bool, error) {
+	res := &gremlin.Response{}
+	query, bindings := nq.gremlinQuery().HasNext().Query()
+	if err := nq.driver.Exec(ctx, query, bindings, res); err != nil {
+		return false, err
+	}
+	return res.ReadBool()
+}
+
+func (nq *NodeQuery) gremlinQuery() *dsl.Traversal {
+	v := g.V().HasLabel(node.Label)
+	if nq.gremlin != nil {
+		v = nq.gremlin.Clone()
+	}
+	for _, p := range nq.predicates {
+		p(v)
+	}
+	if len(nq.order) > 0 {
+		v.Order()
+		for _, p := range nq.order {
+			p(v)
+		}
+	}
+	switch limit, offset := nq.limit, nq.offset; {
+	case limit != nil && offset != nil:
+		v.Range(*offset, *offset+*limit)
+	case offset != nil:
+		v.Range(*offset, math.MaxInt32)
+	case limit != nil:
+		v.Limit(*limit)
+	}
+	if unique := nq.unique; len(unique) == 0 {
+		v.Dedup()
+	}
+	return v
+}
+
+// NodeGroupBy is the builder for group-by Node entities.
+type NodeGroupBy struct {
+	config
+	fields []string
+	fns    []Aggregate
+	// intermediate query.
+	gremlin *dsl.Traversal
+}
+
+// Aggregate adds the given aggregation functions to the group-by query.
+func (ngb *NodeGroupBy) Aggregate(fns ...Aggregate) *NodeGroupBy {
+	ngb.fns = append(ngb.fns, fns...)
+	return ngb
+}
+
+// Scan applies the group-by query and scan the result into the given value.
+func (ngb *NodeGroupBy) Scan(ctx context.Context, v interface{}) error {
+	return ngb.gremlinScan(ctx, v)
+}
+
+// ScanX is like Scan, but panics if an error occurs.
+func (ngb *NodeGroupBy) ScanX(ctx context.Context, v interface{}) {
+	if err := ngb.Scan(ctx, v); err != nil {
+		panic(err)
+	}
+}
+
+// Strings returns list of strings from group-by. It is only allowed when querying group-by with one field.
+func (ngb *NodeGroupBy) Strings(ctx context.Context) ([]string, error) {
+	if len(ngb.fields) > 1 {
+		return nil, errors.New("ent: NodeGroupBy.Strings is not achievable when grouping more than 1 field")
+	}
+	var v []string
+	if err := ngb.Scan(ctx, &v); err != nil {
+		return nil, err
+	}
+	return v, nil
+}
+
+// StringsX is like Strings, but panics if an error occurs.
+func (ngb *NodeGroupBy) StringsX(ctx context.Context) []string {
+	v, err := ngb.Strings(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return v
+}
+
+// Ints returns list of ints from group-by. It is only allowed when querying group-by with one field.
+func (ngb *NodeGroupBy) Ints(ctx context.Context) ([]int, error) {
+	if len(ngb.fields) > 1 {
+		return nil, errors.New("ent: NodeGroupBy.Ints is not achievable when grouping more than 1 field")
+	}
+	var v []int
+	if err := ngb.Scan(ctx, &v); err != nil {
+		return nil, err
+	}
+	return v, nil
+}
+
+// IntsX is like Ints, but panics if an error occurs.
+func (ngb *NodeGroupBy) IntsX(ctx context.Context) []int {
+	v, err := ngb.Ints(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return v
+}
+
+// Float64s returns list of float64s from group-by. It is only allowed when querying group-by with one field.
+func (ngb *NodeGroupBy) Float64s(ctx context.Context) ([]float64, error) {
+	if len(ngb.fields) > 1 {
+		return nil, errors.New("ent: NodeGroupBy.Float64s is not achievable when grouping more than 1 field")
+	}
+	var v []float64
+	if err := ngb.Scan(ctx, &v); err != nil {
+		return nil, err
+	}
+	return v, nil
+}
+
+// Float64sX is like Float64s, but panics if an error occurs.
+func (ngb *NodeGroupBy) Float64sX(ctx context.Context) []float64 {
+	v, err := ngb.Float64s(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return v
+}
+
+// Bools returns list of bools from group-by. It is only allowed when querying group-by with one field.
+func (ngb *NodeGroupBy) Bools(ctx context.Context) ([]bool, error) {
+	if len(ngb.fields) > 1 {
+		return nil, errors.New("ent: NodeGroupBy.Bools is not achievable when grouping more than 1 field")
+	}
+	var v []bool
+	if err := ngb.Scan(ctx, &v); err != nil {
+		return nil, err
+	}
+	return v, nil
+}
+
+// BoolsX is like Bools, but panics if an error occurs.
+func (ngb *NodeGroupBy) BoolsX(ctx context.Context) []bool {
+	v, err := ngb.Bools(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return v
+}
+
+func (ngb *NodeGroupBy) gremlinScan(ctx context.Context, v interface{}) error {
+	res := &gremlin.Response{}
+	query, bindings := ngb.gremlinQuery().Query()
+	if err := ngb.driver.Exec(ctx, query, bindings, res); err != nil {
+		return err
+	}
+	if len(ngb.fields)+len(ngb.fns) == 1 {
+		return res.ReadVal(v)
+	}
+	vm, err := res.ReadValueMap()
+	if err != nil {
+		return err
+	}
+	return vm.Decode(v)
+}
+
+func (ngb *NodeGroupBy) gremlinQuery() *dsl.Traversal {
+	var (
+		trs   []interface{}
+		names []interface{}
+	)
+	for _, fn := range ngb.fns {
+		name, tr := fn("p", "")
+		trs = append(trs, tr)
+		names = append(names, name)
+	}
+	for _, f := range ngb.fields {
+		names = append(names, f)
+		trs = append(trs, __.As("p").Unfold().Values(f).As(f))
+	}
+	return ngb.gremlin.Group().
+		By(__.Values(ngb.fields...).Fold()).
+		By(__.Fold().Match(trs...).Select(names...)).
+		Select(dsl.Values).
+		Next()
+}
+
+// NodeSelect is the builder for select fields of Node entities.
+type NodeSelect struct {
+	config
+	fields []string
+	// intermediate queries.
+	gremlin *dsl.Traversal
+}
+
+// Scan applies the selector query and scan the result into the given value.
+func (ns *NodeSelect) Scan(ctx context.Context, v interface{}) error {
+	return ns.gremlinScan(ctx, v)
+}
+
+// ScanX is like Scan, but panics if an error occurs.
+func (ns *NodeSelect) ScanX(ctx context.Context, v interface{}) {
+	if err := ns.Scan(ctx, v); err != nil {
+		panic(err)
+	}
+}
+
+// Strings returns list of strings from selector. It is only allowed when selecting one field.
+func (ns *NodeSelect) Strings(ctx context.Context) ([]string, error) {
+	if len(ns.fields) > 1 {
+		return nil, errors.New("ent: NodeSelect.Strings is not achievable when selecting more than 1 field")
+	}
+	var v []string
+	if err := ns.Scan(ctx, &v); err != nil {
+		return nil, err
+	}
+	return v, nil
+}
+
+// StringsX is like Strings, but panics if an error occurs.
+func (ns *NodeSelect) StringsX(ctx context.Context) []string {
+	v, err := ns.Strings(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return v
+}
+
+// Ints returns list of ints from selector. It is only allowed when selecting one field.
+func (ns *NodeSelect) Ints(ctx context.Context) ([]int, error) {
+	if len(ns.fields) > 1 {
+		return nil, errors.New("ent: NodeSelect.Ints is not achievable when selecting more than 1 field")
+	}
+	var v []int
+	if err := ns.Scan(ctx, &v); err != nil {
+		return nil, err
+	}
+	return v, nil
+}
+
+// IntsX is like Ints, but panics if an error occurs.
+func (ns *NodeSelect) IntsX(ctx context.Context) []int {
+	v, err := ns.Ints(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return v
+}
+
+// Float64s returns list of float64s from selector. It is only allowed when selecting one field.
+func (ns *NodeSelect) Float64s(ctx context.Context) ([]float64, error) {
+	if len(ns.fields) > 1 {
+		return nil, errors.New("ent: NodeSelect.Float64s is not achievable when selecting more than 1 field")
+	}
+	var v []float64
+	if err := ns.Scan(ctx, &v); err != nil {
+		return nil, err
+	}
+	return v, nil
+}
+
+// Float64sX is like Float64s, but panics if an error occurs.
+func (ns *NodeSelect) Float64sX(ctx context.Context) []float64 {
+	v, err := ns.Float64s(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return v
+}
+
+// Bools returns list of bools from selector. It is only allowed when selecting one field.
+func (ns *NodeSelect) Bools(ctx context.Context) ([]bool, error) {
+	if len(ns.fields) > 1 {
+		return nil, errors.New("ent: NodeSelect.Bools is not achievable when selecting more than 1 field")
+	}
+	var v []bool
+	if err := ns.Scan(ctx, &v); err != nil {
+		return nil, err
+	}
+	return v, nil
+}
+
+// BoolsX is like Bools, but panics if an error occurs.
+func (ns *NodeSelect) BoolsX(ctx context.Context) []bool {
+	v, err := ns.Bools(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return v
+}
+
+func (ns *NodeSelect) gremlinScan(ctx context.Context, v interface{}) error {
+	var (
+		traversal *dsl.Traversal
+		res       = &gremlin.Response{}
+	)
+	if len(ns.fields) == 1 {
+		if ns.fields[0] != node.FieldID {
+			traversal = ns.gremlin.Values(ns.fields...)
+		} else {
+			traversal = ns.gremlin.ID()
+		}
+	} else {
+		fields := make([]interface{}, len(ns.fields))
+		for i, f := range ns.fields {
+			fields[i] = f
+		}
+		traversal = ns.gremlin.ValueMap(fields...)
+	}
+	query, bindings := traversal.Query()
+	if err := ns.driver.Exec(ctx, query, bindings, res); err != nil {
+		return err
+	}
+	if len(ns.fields) == 1 {
+		return res.ReadVal(v)
+	}
+	vm, err := res.ReadValueMap()
+	if err != nil {
+		return err
+	}
+	return vm.Decode(v)
+}