step_query.go

// Code generated by entc, DO NOT EDIT.

package ent

import (
	"context"
	"errors"
	"fmt"
	"math"

	"github.com/empiricaly/recruitment/internal/ent/predicate"
	"github.com/empiricaly/recruitment/internal/ent/step"
	"github.com/empiricaly/recruitment/internal/ent/steprun"
	"github.com/empiricaly/recruitment/internal/ent/template"
	"github.com/facebook/ent/dialect/sql"
	"github.com/facebook/ent/dialect/sql/sqlgraph"
	"github.com/facebook/ent/schema/field"
)

// StepQuery is the builder for querying Step entities.
type StepQuery struct {
	config
	limit      *int
	offset     *int
	order      []OrderFunc
	unique     []string
	predicates []predicate.Step
	// eager-loading edges.
	withStepRun  *StepRunQuery
	withTemplate *TemplateQuery
	withFKs      bool
	// intermediate query (i.e. traversal path).
	sql  *sql.Selector
	path func(context.Context) (*sql.Selector, error)
}

// Where adds a new predicate for the builder.
func (sq *StepQuery) Where(ps ...predicate.Step) *StepQuery {
	sq.predicates = append(sq.predicates, ps...)
	return sq
}

// Limit adds a limit step to the query.
func (sq *StepQuery) Limit(limit int) *StepQuery {
	sq.limit = &limit
	return sq
}

// Offset adds an offset step to the query.
func (sq *StepQuery) Offset(offset int) *StepQuery {
	sq.offset = &offset
	return sq
}

// Order adds an order step to the query.
func (sq *StepQuery) Order(o ...OrderFunc) *StepQuery {
	sq.order = append(sq.order, o...)
	return sq
}

// QueryStepRun chains the current query on the stepRun edge.
func (sq *StepQuery) QueryStepRun() *StepRunQuery {
	query := &StepRunQuery{config: sq.config}
	query.path = func(ctx context.Context) (fromU *sql.Selector, err error) {
		if err := sq.prepareQuery(ctx); err != nil {
			return nil, err
		}
		selector := sq.sqlQuery()
		if err := selector.Err(); err != nil {
			return nil, err
		}
		step := sqlgraph.NewStep(
			sqlgraph.From(step.Table, step.FieldID, selector),
			sqlgraph.To(steprun.Table, steprun.FieldID),
			sqlgraph.Edge(sqlgraph.O2O, true, step.StepRunTable, step.StepRunColumn),
		)
		fromU = sqlgraph.SetNeighbors(sq.driver.Dialect(), step)
		return fromU, nil
	}
	return query
}

// QueryTemplate chains the current query on the template edge.
func (sq *StepQuery) QueryTemplate() *TemplateQuery {
	query := &TemplateQuery{config: sq.config}
	query.path = func(ctx context.Context) (fromU *sql.Selector, err error) {
		if err := sq.prepareQuery(ctx); err != nil {
			return nil, err
		}
		selector := sq.sqlQuery()
		if err := selector.Err(); err != nil {
			return nil, err
		}
		step := sqlgraph.NewStep(
			sqlgraph.From(step.Table, step.FieldID, selector),
			sqlgraph.To(template.Table, template.FieldID),
			sqlgraph.Edge(sqlgraph.M2O, true, step.TemplateTable, step.TemplateColumn),
		)
		fromU = sqlgraph.SetNeighbors(sq.driver.Dialect(), step)
		return fromU, nil
	}
	return query
}

// First returns the first Step entity in the query. Returns *NotFoundError when no step was found.
func (sq *StepQuery) First(ctx context.Context) (*Step, error) {
	nodes, err := sq.Limit(1).All(ctx)
	if err != nil {
		return nil, err
	}
	if len(nodes) == 0 {
		return nil, &NotFoundError{step.Label}
	}
	return nodes[0], nil
}

// FirstX is like First, but panics if an error occurs.
func (sq *StepQuery) FirstX(ctx context.Context) *Step {
	node, err := sq.First(ctx)
	if err != nil && !IsNotFound(err) {
		panic(err)
	}
	return node
}

// FirstID returns the first Step id in the query. Returns *NotFoundError when no id was found.
func (sq *StepQuery) FirstID(ctx context.Context) (id string, err error) {
	var ids []string
	if ids, err = sq.Limit(1).IDs(ctx); err != nil {
		return
	}
	if len(ids) == 0 {
		err = &NotFoundError{step.Label}
		return
	}
	return ids[0], nil
}

// FirstXID is like FirstID, but panics if an error occurs.
func (sq *StepQuery) FirstXID(ctx context.Context) string {
	id, err := sq.FirstID(ctx)
	if err != nil && !IsNotFound(err) {
		panic(err)
	}
	return id
}

// Only returns the only Step entity in the query, returns an error if not exactly one entity was returned.
func (sq *StepQuery) Only(ctx context.Context) (*Step, error) {
	nodes, err := sq.Limit(2).All(ctx)
	if err != nil {
		return nil, err
	}
	switch len(nodes) {
	case 1:
		return nodes[0], nil
	case 0:
		return nil, &NotFoundError{step.Label}
	default:
		return nil, &NotSingularError{step.Label}
	}
}

// OnlyX is like Only, but panics if an error occurs.
func (sq *StepQuery) OnlyX(ctx context.Context) *Step {
	node, err := sq.Only(ctx)
	if err != nil {
		panic(err)
	}
	return node
}

// OnlyID returns the only Step id in the query, returns an error if not exactly one id was returned.
func (sq *StepQuery) OnlyID(ctx context.Context) (id string, err error) {
	var ids []string
	if ids, err = sq.Limit(2).IDs(ctx); err != nil {
		return
	}
	switch len(ids) {
	case 1:
		id = ids[0]
	case 0:
		err = &NotFoundError{step.Label}
	default:
		err = &NotSingularError{step.Label}
	}
	return
}

// OnlyIDX is like OnlyID, but panics if an error occurs.
func (sq *StepQuery) OnlyIDX(ctx context.Context) string {
	id, err := sq.OnlyID(ctx)
	if err != nil {
		panic(err)
	}
	return id
}

// All executes the query and returns a list of Steps.
func (sq *StepQuery) All(ctx context.Context) ([]*Step, error) {
	if err := sq.prepareQuery(ctx); err != nil {
		return nil, err
	}
	return sq.sqlAll(ctx)
}

// AllX is like All, but panics if an error occurs.
func (sq *StepQuery) AllX(ctx context.Context) []*Step {
	nodes, err := sq.All(ctx)
	if err != nil {
		panic(err)
	}
	return nodes
}

// IDs executes the query and returns a list of Step ids.
func (sq *StepQuery) IDs(ctx context.Context) ([]string, error) {
	var ids []string
	if err := sq.Select(step.FieldID).Scan(ctx, &ids); err != nil {
		return nil, err
	}
	return ids, nil
}

// IDsX is like IDs, but panics if an error occurs.
func (sq *StepQuery) IDsX(ctx context.Context) []string {
	ids, err := sq.IDs(ctx)
	if err != nil {
		panic(err)
	}
	return ids
}

// Count returns the count of the given query.
func (sq *StepQuery) Count(ctx context.Context) (int, error) {
	if err := sq.prepareQuery(ctx); err != nil {
		return 0, err
	}
	return sq.sqlCount(ctx)
}

// CountX is like Count, but panics if an error occurs.
func (sq *StepQuery) CountX(ctx context.Context) int {
	count, err := sq.Count(ctx)
	if err != nil {
		panic(err)
	}
	return count
}

// Exist returns true if the query has elements in the graph.
func (sq *StepQuery) Exist(ctx context.Context) (bool, error) {
	if err := sq.prepareQuery(ctx); err != nil {
		return false, err
	}
	return sq.sqlExist(ctx)
}

// ExistX is like Exist, but panics if an error occurs.
func (sq *StepQuery) ExistX(ctx context.Context) bool {
	exist, err := sq.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 (sq *StepQuery) Clone() *StepQuery {
	return &StepQuery{
		config:     sq.config,
		limit:      sq.limit,
		offset:     sq.offset,
		order:      append([]OrderFunc{}, sq.order...),
		unique:     append([]string{}, sq.unique...),
		predicates: append([]predicate.Step{}, sq.predicates...),
		// clone intermediate query.
		sql:  sq.sql.Clone(),
		path: sq.path,
	}
}

//  WithStepRun tells the query-builder to eager-loads the nodes that are connected to
// the "stepRun" edge. The optional arguments used to configure the query builder of the edge.
func (sq *StepQuery) WithStepRun(opts ...func(*StepRunQuery)) *StepQuery {
	query := &StepRunQuery{config: sq.config}
	for _, opt := range opts {
		opt(query)
	}
	sq.withStepRun = query
	return sq
}

//  WithTemplate tells the query-builder to eager-loads the nodes that are connected to
// the "template" edge. The optional arguments used to configure the query builder of the edge.
func (sq *StepQuery) WithTemplate(opts ...func(*TemplateQuery)) *StepQuery {
	query := &TemplateQuery{config: sq.config}
	for _, opt := range opts {
		opt(query)
	}
	sq.withTemplate = query
	return sq
}

// 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 {
//		CreatedAt time.Time `json:"created_at,omitempty"`
//		Count int `json:"count,omitempty"`
//	}
//
//	client.Step.Query().
//		GroupBy(step.FieldCreatedAt).
//		Aggregate(ent.Count()).
//		Scan(ctx, &v)
//
func (sq *StepQuery) GroupBy(field string, fields ...string) *StepGroupBy {
	group := &StepGroupBy{config: sq.config}
	group.fields = append([]string{field}, fields...)
	group.path = func(ctx context.Context) (prev *sql.Selector, err error) {
		if err := sq.prepareQuery(ctx); err != nil {
			return nil, err
		}
		return sq.sqlQuery(), nil
	}
	return group
}

// Select one or more fields from the given query.
//
// Example:
//
//	var v []struct {
//		CreatedAt time.Time `json:"created_at,omitempty"`
//	}
//
//	client.Step.Query().
//		Select(step.FieldCreatedAt).
//		Scan(ctx, &v)
//
func (sq *StepQuery) Select(field string, fields ...string) *StepSelect {
	selector := &StepSelect{config: sq.config}
	selector.fields = append([]string{field}, fields...)
	selector.path = func(ctx context.Context) (prev *sql.Selector, err error) {
		if err := sq.prepareQuery(ctx); err != nil {
			return nil, err
		}
		return sq.sqlQuery(), nil
	}
	return selector
}

func (sq *StepQuery) prepareQuery(ctx context.Context) error {
	if sq.path != nil {
		prev, err := sq.path(ctx)
		if err != nil {
			return err
		}
		sq.sql = prev
	}
	return nil
}

func (sq *StepQuery) sqlAll(ctx context.Context) ([]*Step, error) {
	var (
		nodes       = []*Step{}
		withFKs     = sq.withFKs
		_spec       = sq.querySpec()
		loadedTypes = [2]bool{
			sq.withStepRun != nil,
			sq.withTemplate != nil,
		}
	)
	if sq.withStepRun != nil || sq.withTemplate != nil {
		withFKs = true
	}
	if withFKs {
		_spec.Node.Columns = append(_spec.Node.Columns, step.ForeignKeys...)
	}
	_spec.ScanValues = func() []interface{} {
		node := &Step{config: sq.config}
		nodes = append(nodes, node)
		values := node.scanValues()
		if withFKs {
			values = append(values, node.fkValues()...)
		}
		return values
	}
	_spec.Assign = func(values ...interface{}) error {
		if len(nodes) == 0 {
			return fmt.Errorf("ent: Assign called without calling ScanValues")
		}
		node := nodes[len(nodes)-1]
		node.Edges.loadedTypes = loadedTypes
		return node.assignValues(values...)
	}
	if err := sqlgraph.QueryNodes(ctx, sq.driver, _spec); err != nil {
		return nil, err
	}
	if len(nodes) == 0 {
		return nodes, nil
	}

	if query := sq.withStepRun; query != nil {
		ids := make([]string, 0, len(nodes))
		nodeids := make(map[string][]*Step)
		for i := range nodes {
			if fk := nodes[i].step_run_step; fk != nil {
				ids = append(ids, *fk)
				nodeids[*fk] = append(nodeids[*fk], nodes[i])
			}
		}
		query.Where(steprun.IDIn(ids...))
		neighbors, err := query.All(ctx)
		if err != nil {
			return nil, err
		}
		for _, n := range neighbors {
			nodes, ok := nodeids[n.ID]
			if !ok {
				return nil, fmt.Errorf(`unexpected foreign-key "step_run_step" returned %v`, n.ID)
			}
			for i := range nodes {
				nodes[i].Edges.StepRun = n
			}
		}
	}

	if query := sq.withTemplate; query != nil {
		ids := make([]string, 0, len(nodes))
		nodeids := make(map[string][]*Step)
		for i := range nodes {
			if fk := nodes[i].template_steps; fk != nil {
				ids = append(ids, *fk)
				nodeids[*fk] = append(nodeids[*fk], nodes[i])
			}
		}
		query.Where(template.IDIn(ids...))
		neighbors, err := query.All(ctx)
		if err != nil {
			return nil, err
		}
		for _, n := range neighbors {
			nodes, ok := nodeids[n.ID]
			if !ok {
				return nil, fmt.Errorf(`unexpected foreign-key "template_steps" returned %v`, n.ID)
			}
			for i := range nodes {
				nodes[i].Edges.Template = n
			}
		}
	}

	return nodes, nil
}

func (sq *StepQuery) sqlCount(ctx context.Context) (int, error) {
	_spec := sq.querySpec()
	return sqlgraph.CountNodes(ctx, sq.driver, _spec)
}

func (sq *StepQuery) sqlExist(ctx context.Context) (bool, error) {
	n, err := sq.sqlCount(ctx)
	if err != nil {
		return false, fmt.Errorf("ent: check existence: %v", err)
	}
	return n > 0, nil
}

func (sq *StepQuery) querySpec() *sqlgraph.QuerySpec {
	_spec := &sqlgraph.QuerySpec{
		Node: &sqlgraph.NodeSpec{
			Table:   step.Table,
			Columns: step.Columns,
			ID: &sqlgraph.FieldSpec{
				Type:   field.TypeString,
				Column: step.FieldID,
			},
		},
		From:   sq.sql,
		Unique: true,
	}
	if ps := sq.predicates; len(ps) > 0 {
		_spec.Predicate = func(selector *sql.Selector) {
			for i := range ps {
				ps[i](selector)
			}
		}
	}
	if limit := sq.limit; limit != nil {
		_spec.Limit = *limit
	}
	if offset := sq.offset; offset != nil {
		_spec.Offset = *offset
	}
	if ps := sq.order; len(ps) > 0 {
		_spec.Order = func(selector *sql.Selector) {
			for i := range ps {
				ps[i](selector, step.ValidColumn)
			}
		}
	}
	return _spec
}

func (sq *StepQuery) sqlQuery() *sql.Selector {
	builder := sql.Dialect(sq.driver.Dialect())
	t1 := builder.Table(step.Table)
	selector := builder.Select(t1.Columns(step.Columns...)...).From(t1)
	if sq.sql != nil {
		selector = sq.sql
		selector.Select(selector.Columns(step.Columns...)...)
	}
	for _, p := range sq.predicates {
		p(selector)
	}
	for _, p := range sq.order {
		p(selector, step.ValidColumn)
	}
	if offset := sq.offset; offset != nil {
		// limit is mandatory for offset clause. We start
		// with default value, and override it below if needed.
		selector.Offset(*offset).Limit(math.MaxInt32)
	}
	if limit := sq.limit; limit != nil {
		selector.Limit(*limit)
	}
	return selector
}

// StepGroupBy is the builder for group-by Step entities.
type StepGroupBy struct {
	config
	fields []string
	fns    []AggregateFunc
	// intermediate query (i.e. traversal path).
	sql  *sql.Selector
	path func(context.Context) (*sql.Selector, error)
}

// Aggregate adds the given aggregation functions to the group-by query.
func (sgb *StepGroupBy) Aggregate(fns ...AggregateFunc) *StepGroupBy {
	sgb.fns = append(sgb.fns, fns...)
	return sgb
}

// Scan applies the group-by query and scan the result into the given value.
func (sgb *StepGroupBy) Scan(ctx context.Context, v interface{}) error {
	query, err := sgb.path(ctx)
	if err != nil {
		return err
	}
	sgb.sql = query
	return sgb.sqlScan(ctx, v)
}

// ScanX is like Scan, but panics if an error occurs.
func (sgb *StepGroupBy) ScanX(ctx context.Context, v interface{}) {
	if err := sgb.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 (sgb *StepGroupBy) Strings(ctx context.Context) ([]string, error) {
	if len(sgb.fields) > 1 {
		return nil, errors.New("ent: StepGroupBy.Strings is not achievable when grouping more than 1 field")
	}
	var v []string
	if err := sgb.Scan(ctx, &v); err != nil {
		return nil, err
	}
	return v, nil
}

// StringsX is like Strings, but panics if an error occurs.
func (sgb *StepGroupBy) StringsX(ctx context.Context) []string {
	v, err := sgb.Strings(ctx)
	if err != nil {
		panic(err)
	}
	return v
}

// String returns a single string from group-by. It is only allowed when querying group-by with one field.
func (sgb *StepGroupBy) String(ctx context.Context) (_ string, err error) {
	var v []string
	if v, err = sgb.Strings(ctx); err != nil {
		return
	}
	switch len(v) {
	case 1:
		return v[0], nil
	case 0:
		err = &NotFoundError{step.Label}
	default:
		err = fmt.Errorf("ent: StepGroupBy.Strings returned %d results when one was expected", len(v))
	}
	return
}

// StringX is like String, but panics if an error occurs.
func (sgb *StepGroupBy) StringX(ctx context.Context) string {
	v, err := sgb.String(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 (sgb *StepGroupBy) Ints(ctx context.Context) ([]int, error) {
	if len(sgb.fields) > 1 {
		return nil, errors.New("ent: StepGroupBy.Ints is not achievable when grouping more than 1 field")
	}
	var v []int
	if err := sgb.Scan(ctx, &v); err != nil {
		return nil, err
	}
	return v, nil
}

// IntsX is like Ints, but panics if an error occurs.
func (sgb *StepGroupBy) IntsX(ctx context.Context) []int {
	v, err := sgb.Ints(ctx)
	if err != nil {
		panic(err)
	}
	return v
}

// Int returns a single int from group-by. It is only allowed when querying group-by with one field.
func (sgb *StepGroupBy) Int(ctx context.Context) (_ int, err error) {
	var v []int
	if v, err = sgb.Ints(ctx); err != nil {
		return
	}
	switch len(v) {
	case 1:
		return v[0], nil
	case 0:
		err = &NotFoundError{step.Label}
	default:
		err = fmt.Errorf("ent: StepGroupBy.Ints returned %d results when one was expected", len(v))
	}
	return
}

// IntX is like Int, but panics if an error occurs.
func (sgb *StepGroupBy) IntX(ctx context.Context) int {
	v, err := sgb.Int(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 (sgb *StepGroupBy) Float64s(ctx context.Context) ([]float64, error) {
	if len(sgb.fields) > 1 {
		return nil, errors.New("ent: StepGroupBy.Float64s is not achievable when grouping more than 1 field")
	}
	var v []float64
	if err := sgb.Scan(ctx, &v); err != nil {
		return nil, err
	}
	return v, nil
}

// Float64sX is like Float64s, but panics if an error occurs.
func (sgb *StepGroupBy) Float64sX(ctx context.Context) []float64 {
	v, err := sgb.Float64s(ctx)
	if err != nil {
		panic(err)
	}
	return v
}

// Float64 returns a single float64 from group-by. It is only allowed when querying group-by with one field.
func (sgb *StepGroupBy) Float64(ctx context.Context) (_ float64, err error) {
	var v []float64
	if v, err = sgb.Float64s(ctx); err != nil {
		return
	}
	switch len(v) {
	case 1:
		return v[0], nil
	case 0:
		err = &NotFoundError{step.Label}
	default:
		err = fmt.Errorf("ent: StepGroupBy.Float64s returned %d results when one was expected", len(v))
	}
	return
}

// Float64X is like Float64, but panics if an error occurs.
func (sgb *StepGroupBy) Float64X(ctx context.Context) float64 {
	v, err := sgb.Float64(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 (sgb *StepGroupBy) Bools(ctx context.Context) ([]bool, error) {
	if len(sgb.fields) > 1 {
		return nil, errors.New("ent: StepGroupBy.Bools is not achievable when grouping more than 1 field")
	}
	var v []bool
	if err := sgb.Scan(ctx, &v); err != nil {
		return nil, err
	}
	return v, nil
}

// BoolsX is like Bools, but panics if an error occurs.
func (sgb *StepGroupBy) BoolsX(ctx context.Context) []bool {
	v, err := sgb.Bools(ctx)
	if err != nil {
		panic(err)
	}
	return v
}

// Bool returns a single bool from group-by. It is only allowed when querying group-by with one field.
func (sgb *StepGroupBy) Bool(ctx context.Context) (_ bool, err error) {
	var v []bool
	if v, err = sgb.Bools(ctx); err != nil {
		return
	}
	switch len(v) {
	case 1:
		return v[0], nil
	case 0:
		err = &NotFoundError{step.Label}
	default:
		err = fmt.Errorf("ent: StepGroupBy.Bools returned %d results when one was expected", len(v))
	}
	return
}

// BoolX is like Bool, but panics if an error occurs.
func (sgb *StepGroupBy) BoolX(ctx context.Context) bool {
	v, err := sgb.Bool(ctx)
	if err != nil {
		panic(err)
	}
	return v
}

func (sgb *StepGroupBy) sqlScan(ctx context.Context, v interface{}) error {
	for _, f := range sgb.fields {
		if !step.ValidColumn(f) {
			return &ValidationError{Name: f, err: fmt.Errorf("invalid field %q for group-by", f)}
		}
	}
	selector := sgb.sqlQuery()
	if err := selector.Err(); err != nil {
		return err
	}
	rows := &sql.Rows{}
	query, args := selector.Query()
	if err := sgb.driver.Query(ctx, query, args, rows); err != nil {
		return err
	}
	defer rows.Close()
	return sql.ScanSlice(rows, v)
}

func (sgb *StepGroupBy) sqlQuery() *sql.Selector {
	selector := sgb.sql
	columns := make([]string, 0, len(sgb.fields)+len(sgb.fns))
	columns = append(columns, sgb.fields...)
	for _, fn := range sgb.fns {
		columns = append(columns, fn(selector, step.ValidColumn))
	}
	return selector.Select(columns...).GroupBy(sgb.fields...)
}

// StepSelect is the builder for select fields of Step entities.
type StepSelect struct {
	config
	fields []string
	// intermediate query (i.e. traversal path).
	sql  *sql.Selector
	path func(context.Context) (*sql.Selector, error)
}

// Scan applies the selector query and scan the result into the given value.
func (ss *StepSelect) Scan(ctx context.Context, v interface{}) error {
	query, err := ss.path(ctx)
	if err != nil {
		return err
	}
	ss.sql = query
	return ss.sqlScan(ctx, v)
}

// ScanX is like Scan, but panics if an error occurs.
func (ss *StepSelect) ScanX(ctx context.Context, v interface{}) {
	if err := ss.Scan(ctx, v); err != nil {
		panic(err)
	}
}

// Strings returns list of strings from selector. It is only allowed when selecting one field.
func (ss *StepSelect) Strings(ctx context.Context) ([]string, error) {
	if len(ss.fields) > 1 {
		return nil, errors.New("ent: StepSelect.Strings is not achievable when selecting more than 1 field")
	}
	var v []string
	if err := ss.Scan(ctx, &v); err != nil {
		return nil, err
	}
	return v, nil
}

// StringsX is like Strings, but panics if an error occurs.
func (ss *StepSelect) StringsX(ctx context.Context) []string {
	v, err := ss.Strings(ctx)
	if err != nil {
		panic(err)
	}
	return v
}

// String returns a single string from selector. It is only allowed when selecting one field.
func (ss *StepSelect) String(ctx context.Context) (_ string, err error) {
	var v []string
	if v, err = ss.Strings(ctx); err != nil {
		return
	}
	switch len(v) {
	case 1:
		return v[0], nil
	case 0:
		err = &NotFoundError{step.Label}
	default:
		err = fmt.Errorf("ent: StepSelect.Strings returned %d results when one was expected", len(v))
	}
	return
}

// StringX is like String, but panics if an error occurs.
func (ss *StepSelect) StringX(ctx context.Context) string {
	v, err := ss.String(ctx)
	if err != nil {
		panic(err)
	}
	return v
}

// Ints returns list of ints from selector. It is only allowed when selecting one field.
func (ss *StepSelect) Ints(ctx context.Context) ([]int, error) {
	if len(ss.fields) > 1 {
		return nil, errors.New("ent: StepSelect.Ints is not achievable when selecting more than 1 field")
	}
	var v []int
	if err := ss.Scan(ctx, &v); err != nil {
		return nil, err
	}
	return v, nil
}

// IntsX is like Ints, but panics if an error occurs.
func (ss *StepSelect) IntsX(ctx context.Context) []int {
	v, err := ss.Ints(ctx)
	if err != nil {
		panic(err)
	}
	return v
}

// Int returns a single int from selector. It is only allowed when selecting one field.
func (ss *StepSelect) Int(ctx context.Context) (_ int, err error) {
	var v []int
	if v, err = ss.Ints(ctx); err != nil {
		return
	}
	switch len(v) {
	case 1:
		return v[0], nil
	case 0:
		err = &NotFoundError{step.Label}
	default:
		err = fmt.Errorf("ent: StepSelect.Ints returned %d results when one was expected", len(v))
	}
	return
}

// IntX is like Int, but panics if an error occurs.
func (ss *StepSelect) IntX(ctx context.Context) int {
	v, err := ss.Int(ctx)
	if err != nil {
		panic(err)
	}
	return v
}

// Float64s returns list of float64s from selector. It is only allowed when selecting one field.
func (ss *StepSelect) Float64s(ctx context.Context) ([]float64, error) {
	if len(ss.fields) > 1 {
		return nil, errors.New("ent: StepSelect.Float64s is not achievable when selecting more than 1 field")
	}
	var v []float64
	if err := ss.Scan(ctx, &v); err != nil {
		return nil, err
	}
	return v, nil
}

// Float64sX is like Float64s, but panics if an error occurs.
func (ss *StepSelect) Float64sX(ctx context.Context) []float64 {
	v, err := ss.Float64s(ctx)
	if err != nil {
		panic(err)
	}
	return v
}

// Float64 returns a single float64 from selector. It is only allowed when selecting one field.
func (ss *StepSelect) Float64(ctx context.Context) (_ float64, err error) {
	var v []float64
	if v, err = ss.Float64s(ctx); err != nil {
		return
	}
	switch len(v) {
	case 1:
		return v[0], nil
	case 0:
		err = &NotFoundError{step.Label}
	default:
		err = fmt.Errorf("ent: StepSelect.Float64s returned %d results when one was expected", len(v))
	}
	return
}

// Float64X is like Float64, but panics if an error occurs.
func (ss *StepSelect) Float64X(ctx context.Context) float64 {
	v, err := ss.Float64(ctx)
	if err != nil {
		panic(err)
	}
	return v
}

// Bools returns list of bools from selector. It is only allowed when selecting one field.
func (ss *StepSelect) Bools(ctx context.Context) ([]bool, error) {
	if len(ss.fields) > 1 {
		return nil, errors.New("ent: StepSelect.Bools is not achievable when selecting more than 1 field")
	}
	var v []bool
	if err := ss.Scan(ctx, &v); err != nil {
		return nil, err
	}
	return v, nil
}

// BoolsX is like Bools, but panics if an error occurs.
func (ss *StepSelect) BoolsX(ctx context.Context) []bool {
	v, err := ss.Bools(ctx)
	if err != nil {
		panic(err)
	}
	return v
}

// Bool returns a single bool from selector. It is only allowed when selecting one field.
func (ss *StepSelect) Bool(ctx context.Context) (_ bool, err error) {
	var v []bool
	if v, err = ss.Bools(ctx); err != nil {
		return
	}
	switch len(v) {
	case 1:
		return v[0], nil
	case 0:
		err = &NotFoundError{step.Label}
	default:
		err = fmt.Errorf("ent: StepSelect.Bools returned %d results when one was expected", len(v))
	}
	return
}

// BoolX is like Bool, but panics if an error occurs.
func (ss *StepSelect) BoolX(ctx context.Context) bool {
	v, err := ss.Bool(ctx)
	if err != nil {
		panic(err)
	}
	return v
}

func (ss *StepSelect) sqlScan(ctx context.Context, v interface{}) error {
	for _, f := range ss.fields {
		if !step.ValidColumn(f) {
			return &ValidationError{Name: f, err: fmt.Errorf("invalid field %q for selection", f)}
		}
	}
	rows := &sql.Rows{}
	query, args := ss.sqlQuery().Query()
	if err := ss.driver.Query(ctx, query, args, rows); err != nil {
		return err
	}
	defer rows.Close()
	return sql.ScanSlice(rows, v)
}

func (ss *StepSelect) sqlQuery() sql.Querier {
	selector := ss.sql
	selector.Select(selector.Columns(ss.fields...)...)
	return selector
}