generate database schemas

backend/ent/item_query.go

@@ -0,0 +1,861 @@
+// Code generated by ent, DO NOT EDIT.
+
+package ent
+
+import (
+	"context"
+	"database/sql/driver"
+	"fmt"
+	"math"
+
+	"entgo.io/ent/dialect/sql"
+	"entgo.io/ent/dialect/sql/sqlgraph"
+	"entgo.io/ent/schema/field"
+	"github.com/google/uuid"
+	"github.com/hay-kot/content/backend/ent/group"
+	"github.com/hay-kot/content/backend/ent/item"
+	"github.com/hay-kot/content/backend/ent/itemfield"
+	"github.com/hay-kot/content/backend/ent/label"
+	"github.com/hay-kot/content/backend/ent/location"
+	"github.com/hay-kot/content/backend/ent/predicate"
+)
+
+// ItemQuery is the builder for querying Item entities.
+type ItemQuery struct {
+	config
+	limit        *int
+	offset       *int
+	unique       *bool
+	order        []OrderFunc
+	fields       []string
+	predicates   []predicate.Item
+	withGroup    *GroupQuery
+	withLocation *LocationQuery
+	withFields   *ItemFieldQuery
+	withLabel    *LabelQuery
+	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 ItemQuery builder.
+func (iq *ItemQuery) Where(ps ...predicate.Item) *ItemQuery {
+	iq.predicates = append(iq.predicates, ps...)
+	return iq
+}
+
+// Limit adds a limit step to the query.
+func (iq *ItemQuery) Limit(limit int) *ItemQuery {
+	iq.limit = &limit
+	return iq
+}
+
+// Offset adds an offset step to the query.
+func (iq *ItemQuery) Offset(offset int) *ItemQuery {
+	iq.offset = &offset
+	return iq
+}
+
+// Unique configures the query builder to filter duplicate records on query.
+// By default, unique is set to true, and can be disabled using this method.
+func (iq *ItemQuery) Unique(unique bool) *ItemQuery {
+	iq.unique = &unique
+	return iq
+}
+
+// Order adds an order step to the query.
+func (iq *ItemQuery) Order(o ...OrderFunc) *ItemQuery {
+	iq.order = append(iq.order, o...)
+	return iq
+}
+
+// QueryGroup chains the current query on the "group" edge.
+func (iq *ItemQuery) QueryGroup() *GroupQuery {
+	query := &GroupQuery{config: iq.config}
+	query.path = func(ctx context.Context) (fromU *sql.Selector, err error) {
+		if err := iq.prepareQuery(ctx); err != nil {
+			return nil, err
+		}
+		selector := iq.sqlQuery(ctx)
+		if err := selector.Err(); err != nil {
+			return nil, err
+		}
+		step := sqlgraph.NewStep(
+			sqlgraph.From(item.Table, item.FieldID, selector),
+			sqlgraph.To(group.Table, group.FieldID),
+			sqlgraph.Edge(sqlgraph.M2O, true, item.GroupTable, item.GroupColumn),
+		)
+		fromU = sqlgraph.SetNeighbors(iq.driver.Dialect(), step)
+		return fromU, nil
+	}
+	return query
+}
+
+// QueryLocation chains the current query on the "location" edge.
+func (iq *ItemQuery) QueryLocation() *LocationQuery {
+	query := &LocationQuery{config: iq.config}
+	query.path = func(ctx context.Context) (fromU *sql.Selector, err error) {
+		if err := iq.prepareQuery(ctx); err != nil {
+			return nil, err
+		}
+		selector := iq.sqlQuery(ctx)
+		if err := selector.Err(); err != nil {
+			return nil, err
+		}
+		step := sqlgraph.NewStep(
+			sqlgraph.From(item.Table, item.FieldID, selector),
+			sqlgraph.To(location.Table, location.FieldID),
+			sqlgraph.Edge(sqlgraph.M2O, true, item.LocationTable, item.LocationColumn),
+		)
+		fromU = sqlgraph.SetNeighbors(iq.driver.Dialect(), step)
+		return fromU, nil
+	}
+	return query
+}
+
+// QueryFields chains the current query on the "fields" edge.
+func (iq *ItemQuery) QueryFields() *ItemFieldQuery {
+	query := &ItemFieldQuery{config: iq.config}
+	query.path = func(ctx context.Context) (fromU *sql.Selector, err error) {
+		if err := iq.prepareQuery(ctx); err != nil {
+			return nil, err
+		}
+		selector := iq.sqlQuery(ctx)
+		if err := selector.Err(); err != nil {
+			return nil, err
+		}
+		step := sqlgraph.NewStep(
+			sqlgraph.From(item.Table, item.FieldID, selector),
+			sqlgraph.To(itemfield.Table, itemfield.FieldID),
+			sqlgraph.Edge(sqlgraph.O2M, false, item.FieldsTable, item.FieldsColumn),
+		)
+		fromU = sqlgraph.SetNeighbors(iq.driver.Dialect(), step)
+		return fromU, nil
+	}
+	return query
+}
+
+// QueryLabel chains the current query on the "label" edge.
+func (iq *ItemQuery) QueryLabel() *LabelQuery {
+	query := &LabelQuery{config: iq.config}
+	query.path = func(ctx context.Context) (fromU *sql.Selector, err error) {
+		if err := iq.prepareQuery(ctx); err != nil {
+			return nil, err
+		}
+		selector := iq.sqlQuery(ctx)
+		if err := selector.Err(); err != nil {
+			return nil, err
+		}
+		step := sqlgraph.NewStep(
+			sqlgraph.From(item.Table, item.FieldID, selector),
+			sqlgraph.To(label.Table, label.FieldID),
+			sqlgraph.Edge(sqlgraph.M2M, true, item.LabelTable, item.LabelPrimaryKey...),
+		)
+		fromU = sqlgraph.SetNeighbors(iq.driver.Dialect(), step)
+		return fromU, nil
+	}
+	return query
+}
+
+// First returns the first Item entity from the query.
+// Returns a *NotFoundError when no Item was found.
+func (iq *ItemQuery) First(ctx context.Context) (*Item, error) {
+	nodes, err := iq.Limit(1).All(ctx)
+	if err != nil {
+		return nil, err
+	}
+	if len(nodes) == 0 {
+		return nil, &NotFoundError{item.Label}
+	}
+	return nodes[0], nil
+}
+
+// FirstX is like First, but panics if an error occurs.
+func (iq *ItemQuery) FirstX(ctx context.Context) *Item {
+	node, err := iq.First(ctx)
+	if err != nil && !IsNotFound(err) {
+		panic(err)
+	}
+	return node
+}
+
+// FirstID returns the first Item ID from the query.
+// Returns a *NotFoundError when no Item ID was found.
+func (iq *ItemQuery) FirstID(ctx context.Context) (id uuid.UUID, err error) {
+	var ids []uuid.UUID
+	if ids, err = iq.Limit(1).IDs(ctx); err != nil {
+		return
+	}
+	if len(ids) == 0 {
+		err = &NotFoundError{item.Label}
+		return
+	}
+	return ids[0], nil
+}
+
+// FirstIDX is like FirstID, but panics if an error occurs.
+func (iq *ItemQuery) FirstIDX(ctx context.Context) uuid.UUID {
+	id, err := iq.FirstID(ctx)
+	if err != nil && !IsNotFound(err) {
+		panic(err)
+	}
+	return id
+}
+
+// Only returns a single Item entity found by the query, ensuring it only returns one.
+// Returns a *NotSingularError when more than one Item entity is found.
+// Returns a *NotFoundError when no Item entities are found.
+func (iq *ItemQuery) Only(ctx context.Context) (*Item, error) {
+	nodes, err := iq.Limit(2).All(ctx)
+	if err != nil {
+		return nil, err
+	}
+	switch len(nodes) {
+	case 1:
+		return nodes[0], nil
+	case 0:
+		return nil, &NotFoundError{item.Label}
+	default:
+		return nil, &NotSingularError{item.Label}
+	}
+}
+
+// OnlyX is like Only, but panics if an error occurs.
+func (iq *ItemQuery) OnlyX(ctx context.Context) *Item {
+	node, err := iq.Only(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return node
+}
+
+// OnlyID is like Only, but returns the only Item ID in the query.
+// Returns a *NotSingularError when more than one Item ID is found.
+// Returns a *NotFoundError when no entities are found.
+func (iq *ItemQuery) OnlyID(ctx context.Context) (id uuid.UUID, err error) {
+	var ids []uuid.UUID
+	if ids, err = iq.Limit(2).IDs(ctx); err != nil {
+		return
+	}
+	switch len(ids) {
+	case 1:
+		id = ids[0]
+	case 0:
+		err = &NotFoundError{item.Label}
+	default:
+		err = &NotSingularError{item.Label}
+	}
+	return
+}
+
+// OnlyIDX is like OnlyID, but panics if an error occurs.
+func (iq *ItemQuery) OnlyIDX(ctx context.Context) uuid.UUID {
+	id, err := iq.OnlyID(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return id
+}
+
+// All executes the query and returns a list of Items.
+func (iq *ItemQuery) All(ctx context.Context) ([]*Item, error) {
+	if err := iq.prepareQuery(ctx); err != nil {
+		return nil, err
+	}
+	return iq.sqlAll(ctx)
+}
+
+// AllX is like All, but panics if an error occurs.
+func (iq *ItemQuery) AllX(ctx context.Context) []*Item {
+	nodes, err := iq.All(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return nodes
+}
+
+// IDs executes the query and returns a list of Item IDs.
+func (iq *ItemQuery) IDs(ctx context.Context) ([]uuid.UUID, error) {
+	var ids []uuid.UUID
+	if err := iq.Select(item.FieldID).Scan(ctx, &ids); err != nil {
+		return nil, err
+	}
+	return ids, nil
+}
+
+// IDsX is like IDs, but panics if an error occurs.
+func (iq *ItemQuery) IDsX(ctx context.Context) []uuid.UUID {
+	ids, err := iq.IDs(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return ids
+}
+
+// Count returns the count of the given query.
+func (iq *ItemQuery) Count(ctx context.Context) (int, error) {
+	if err := iq.prepareQuery(ctx); err != nil {
+		return 0, err
+	}
+	return iq.sqlCount(ctx)
+}
+
+// CountX is like Count, but panics if an error occurs.
+func (iq *ItemQuery) CountX(ctx context.Context) int {
+	count, err := iq.Count(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return count
+}
+
+// Exist returns true if the query has elements in the graph.
+func (iq *ItemQuery) Exist(ctx context.Context) (bool, error) {
+	if err := iq.prepareQuery(ctx); err != nil {
+		return false, err
+	}
+	return iq.sqlExist(ctx)
+}
+
+// ExistX is like Exist, but panics if an error occurs.
+func (iq *ItemQuery) ExistX(ctx context.Context) bool {
+	exist, err := iq.Exist(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return exist
+}
+
+// Clone returns a duplicate of the ItemQuery builder, including all associated steps. It can be
+// used to prepare common query builders and use them differently after the clone is made.
+func (iq *ItemQuery) Clone() *ItemQuery {
+	if iq == nil {
+		return nil
+	}
+	return &ItemQuery{
+		config:       iq.config,
+		limit:        iq.limit,
+		offset:       iq.offset,
+		order:        append([]OrderFunc{}, iq.order...),
+		predicates:   append([]predicate.Item{}, iq.predicates...),
+		withGroup:    iq.withGroup.Clone(),
+		withLocation: iq.withLocation.Clone(),
+		withFields:   iq.withFields.Clone(),
+		withLabel:    iq.withLabel.Clone(),
+		// clone intermediate query.
+		sql:    iq.sql.Clone(),
+		path:   iq.path,
+		unique: iq.unique,
+	}
+}
+
+// WithGroup tells the query-builder to eager-load the nodes that are connected to
+// the "group" edge. The optional arguments are used to configure the query builder of the edge.
+func (iq *ItemQuery) WithGroup(opts ...func(*GroupQuery)) *ItemQuery {
+	query := &GroupQuery{config: iq.config}
+	for _, opt := range opts {
+		opt(query)
+	}
+	iq.withGroup = query
+	return iq
+}
+
+// WithLocation tells the query-builder to eager-load the nodes that are connected to
+// the "location" edge. The optional arguments are used to configure the query builder of the edge.
+func (iq *ItemQuery) WithLocation(opts ...func(*LocationQuery)) *ItemQuery {
+	query := &LocationQuery{config: iq.config}
+	for _, opt := range opts {
+		opt(query)
+	}
+	iq.withLocation = query
+	return iq
+}
+
+// WithFields tells the query-builder to eager-load the nodes that are connected to
+// the "fields" edge. The optional arguments are used to configure the query builder of the edge.
+func (iq *ItemQuery) WithFields(opts ...func(*ItemFieldQuery)) *ItemQuery {
+	query := &ItemFieldQuery{config: iq.config}
+	for _, opt := range opts {
+		opt(query)
+	}
+	iq.withFields = query
+	return iq
+}
+
+// WithLabel tells the query-builder to eager-load the nodes that are connected to
+// the "label" edge. The optional arguments are used to configure the query builder of the edge.
+func (iq *ItemQuery) WithLabel(opts ...func(*LabelQuery)) *ItemQuery {
+	query := &LabelQuery{config: iq.config}
+	for _, opt := range opts {
+		opt(query)
+	}
+	iq.withLabel = query
+	return iq
+}
+
+// GroupBy is 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.Item.Query().
+//		GroupBy(item.FieldCreatedAt).
+//		Aggregate(ent.Count()).
+//		Scan(ctx, &v)
+func (iq *ItemQuery) GroupBy(field string, fields ...string) *ItemGroupBy {
+	grbuild := &ItemGroupBy{config: iq.config}
+	grbuild.fields = append([]string{field}, fields...)
+	grbuild.path = func(ctx context.Context) (prev *sql.Selector, err error) {
+		if err := iq.prepareQuery(ctx); err != nil {
+			return nil, err
+		}
+		return iq.sqlQuery(ctx), nil
+	}
+	grbuild.label = item.Label
+	grbuild.flds, grbuild.scan = &grbuild.fields, grbuild.Scan
+	return grbuild
+}
+
+// Select allows the selection one or more fields/columns for the given query,
+// instead of selecting all fields in the entity.
+//
+// Example:
+//
+//	var v []struct {
+//		CreatedAt time.Time `json:"created_at,omitempty"`
+//	}
+//
+//	client.Item.Query().
+//		Select(item.FieldCreatedAt).
+//		Scan(ctx, &v)
+func (iq *ItemQuery) Select(fields ...string) *ItemSelect {
+	iq.fields = append(iq.fields, fields...)
+	selbuild := &ItemSelect{ItemQuery: iq}
+	selbuild.label = item.Label
+	selbuild.flds, selbuild.scan = &iq.fields, selbuild.Scan
+	return selbuild
+}
+
+func (iq *ItemQuery) prepareQuery(ctx context.Context) error {
+	for _, f := range iq.fields {
+		if !item.ValidColumn(f) {
+			return &ValidationError{Name: f, err: fmt.Errorf("ent: invalid field %q for query", f)}
+		}
+	}
+	if iq.path != nil {
+		prev, err := iq.path(ctx)
+		if err != nil {
+			return err
+		}
+		iq.sql = prev
+	}
+	return nil
+}
+
+func (iq *ItemQuery) sqlAll(ctx context.Context, hooks ...queryHook) ([]*Item, error) {
+	var (
+		nodes       = []*Item{}
+		withFKs     = iq.withFKs
+		_spec       = iq.querySpec()
+		loadedTypes = [4]bool{
+			iq.withGroup != nil,
+			iq.withLocation != nil,
+			iq.withFields != nil,
+			iq.withLabel != nil,
+		}
+	)
+	if iq.withGroup != nil || iq.withLocation != nil {
+		withFKs = true
+	}
+	if withFKs {
+		_spec.Node.Columns = append(_spec.Node.Columns, item.ForeignKeys...)
+	}
+	_spec.ScanValues = func(columns []string) ([]interface{}, error) {
+		return (*Item).scanValues(nil, columns)
+	}
+	_spec.Assign = func(columns []string, values []interface{}) error {
+		node := &Item{config: iq.config}
+		nodes = append(nodes, node)
+		node.Edges.loadedTypes = loadedTypes
+		return node.assignValues(columns, values)
+	}
+	for i := range hooks {
+		hooks[i](ctx, _spec)
+	}
+	if err := sqlgraph.QueryNodes(ctx, iq.driver, _spec); err != nil {
+		return nil, err
+	}
+	if len(nodes) == 0 {
+		return nodes, nil
+	}
+	if query := iq.withGroup; query != nil {
+		if err := iq.loadGroup(ctx, query, nodes, nil,
+			func(n *Item, e *Group) { n.Edges.Group = e }); err != nil {
+			return nil, err
+		}
+	}
+	if query := iq.withLocation; query != nil {
+		if err := iq.loadLocation(ctx, query, nodes, nil,
+			func(n *Item, e *Location) { n.Edges.Location = e }); err != nil {
+			return nil, err
+		}
+	}
+	if query := iq.withFields; query != nil {
+		if err := iq.loadFields(ctx, query, nodes,
+			func(n *Item) { n.Edges.Fields = []*ItemField{} },
+			func(n *Item, e *ItemField) { n.Edges.Fields = append(n.Edges.Fields, e) }); err != nil {
+			return nil, err
+		}
+	}
+	if query := iq.withLabel; query != nil {
+		if err := iq.loadLabel(ctx, query, nodes,
+			func(n *Item) { n.Edges.Label = []*Label{} },
+			func(n *Item, e *Label) { n.Edges.Label = append(n.Edges.Label, e) }); err != nil {
+			return nil, err
+		}
+	}
+	return nodes, nil
+}
+
+func (iq *ItemQuery) loadGroup(ctx context.Context, query *GroupQuery, nodes []*Item, init func(*Item), assign func(*Item, *Group)) error {
+	ids := make([]uuid.UUID, 0, len(nodes))
+	nodeids := make(map[uuid.UUID][]*Item)
+	for i := range nodes {
+		if nodes[i].group_items == nil {
+			continue
+		}
+		fk := *nodes[i].group_items
+		if _, ok := nodeids[fk]; !ok {
+			ids = append(ids, fk)
+		}
+		nodeids[fk] = append(nodeids[fk], nodes[i])
+	}
+	query.Where(group.IDIn(ids...))
+	neighbors, err := query.All(ctx)
+	if err != nil {
+		return err
+	}
+	for _, n := range neighbors {
+		nodes, ok := nodeids[n.ID]
+		if !ok {
+			return fmt.Errorf(`unexpected foreign-key "group_items" returned %v`, n.ID)
+		}
+		for i := range nodes {
+			assign(nodes[i], n)
+		}
+	}
+	return nil
+}
+func (iq *ItemQuery) loadLocation(ctx context.Context, query *LocationQuery, nodes []*Item, init func(*Item), assign func(*Item, *Location)) error {
+	ids := make([]uuid.UUID, 0, len(nodes))
+	nodeids := make(map[uuid.UUID][]*Item)
+	for i := range nodes {
+		if nodes[i].location_items == nil {
+			continue
+		}
+		fk := *nodes[i].location_items
+		if _, ok := nodeids[fk]; !ok {
+			ids = append(ids, fk)
+		}
+		nodeids[fk] = append(nodeids[fk], nodes[i])
+	}
+	query.Where(location.IDIn(ids...))
+	neighbors, err := query.All(ctx)
+	if err != nil {
+		return err
+	}
+	for _, n := range neighbors {
+		nodes, ok := nodeids[n.ID]
+		if !ok {
+			return fmt.Errorf(`unexpected foreign-key "location_items" returned %v`, n.ID)
+		}
+		for i := range nodes {
+			assign(nodes[i], n)
+		}
+	}
+	return nil
+}
+func (iq *ItemQuery) loadFields(ctx context.Context, query *ItemFieldQuery, nodes []*Item, init func(*Item), assign func(*Item, *ItemField)) error {
+	fks := make([]driver.Value, 0, len(nodes))
+	nodeids := make(map[uuid.UUID]*Item)
+	for i := range nodes {
+		fks = append(fks, nodes[i].ID)
+		nodeids[nodes[i].ID] = nodes[i]
+		if init != nil {
+			init(nodes[i])
+		}
+	}
+	query.withFKs = true
+	query.Where(predicate.ItemField(func(s *sql.Selector) {
+		s.Where(sql.InValues(item.FieldsColumn, fks...))
+	}))
+	neighbors, err := query.All(ctx)
+	if err != nil {
+		return err
+	}
+	for _, n := range neighbors {
+		fk := n.item_fields
+		if fk == nil {
+			return fmt.Errorf(`foreign-key "item_fields" is nil for node %v`, n.ID)
+		}
+		node, ok := nodeids[*fk]
+		if !ok {
+			return fmt.Errorf(`unexpected foreign-key "item_fields" returned %v for node %v`, *fk, n.ID)
+		}
+		assign(node, n)
+	}
+	return nil
+}
+func (iq *ItemQuery) loadLabel(ctx context.Context, query *LabelQuery, nodes []*Item, init func(*Item), assign func(*Item, *Label)) error {
+	edgeIDs := make([]driver.Value, len(nodes))
+	byID := make(map[uuid.UUID]*Item)
+	nids := make(map[uuid.UUID]map[*Item]struct{})
+	for i, node := range nodes {
+		edgeIDs[i] = node.ID
+		byID[node.ID] = node
+		if init != nil {
+			init(node)
+		}
+	}
+	query.Where(func(s *sql.Selector) {
+		joinT := sql.Table(item.LabelTable)
+		s.Join(joinT).On(s.C(label.FieldID), joinT.C(item.LabelPrimaryKey[0]))
+		s.Where(sql.InValues(joinT.C(item.LabelPrimaryKey[1]), edgeIDs...))
+		columns := s.SelectedColumns()
+		s.Select(joinT.C(item.LabelPrimaryKey[1]))
+		s.AppendSelect(columns...)
+		s.SetDistinct(false)
+	})
+	if err := query.prepareQuery(ctx); err != nil {
+		return err
+	}
+	neighbors, err := query.sqlAll(ctx, func(_ context.Context, spec *sqlgraph.QuerySpec) {
+		assign := spec.Assign
+		values := spec.ScanValues
+		spec.ScanValues = func(columns []string) ([]interface{}, error) {
+			values, err := values(columns[1:])
+			if err != nil {
+				return nil, err
+			}
+			return append([]interface{}{new(uuid.UUID)}, values...), nil
+		}
+		spec.Assign = func(columns []string, values []interface{}) error {
+			outValue := *values[0].(*uuid.UUID)
+			inValue := *values[1].(*uuid.UUID)
+			if nids[inValue] == nil {
+				nids[inValue] = map[*Item]struct{}{byID[outValue]: struct{}{}}
+				return assign(columns[1:], values[1:])
+			}
+			nids[inValue][byID[outValue]] = struct{}{}
+			return nil
+		}
+	})
+	if err != nil {
+		return err
+	}
+	for _, n := range neighbors {
+		nodes, ok := nids[n.ID]
+		if !ok {
+			return fmt.Errorf(`unexpected "label" node returned %v`, n.ID)
+		}
+		for kn := range nodes {
+			assign(kn, n)
+		}
+	}
+	return nil
+}
+
+func (iq *ItemQuery) sqlCount(ctx context.Context) (int, error) {
+	_spec := iq.querySpec()
+	_spec.Node.Columns = iq.fields
+	if len(iq.fields) > 0 {
+		_spec.Unique = iq.unique != nil && *iq.unique
+	}
+	return sqlgraph.CountNodes(ctx, iq.driver, _spec)
+}
+
+func (iq *ItemQuery) sqlExist(ctx context.Context) (bool, error) {
+	n, err := iq.sqlCount(ctx)
+	if err != nil {
+		return false, fmt.Errorf("ent: check existence: %w", err)
+	}
+	return n > 0, nil
+}
+
+func (iq *ItemQuery) querySpec() *sqlgraph.QuerySpec {
+	_spec := &sqlgraph.QuerySpec{
+		Node: &sqlgraph.NodeSpec{
+			Table:   item.Table,
+			Columns: item.Columns,
+			ID: &sqlgraph.FieldSpec{
+				Type:   field.TypeUUID,
+				Column: item.FieldID,
+			},
+		},
+		From:   iq.sql,
+		Unique: true,
+	}
+	if unique := iq.unique; unique != nil {
+		_spec.Unique = *unique
+	}
+	if fields := iq.fields; len(fields) > 0 {
+		_spec.Node.Columns = make([]string, 0, len(fields))
+		_spec.Node.Columns = append(_spec.Node.Columns, item.FieldID)
+		for i := range fields {
+			if fields[i] != item.FieldID {
+				_spec.Node.Columns = append(_spec.Node.Columns, fields[i])
+			}
+		}
+	}
+	if ps := iq.predicates; len(ps) > 0 {
+		_spec.Predicate = func(selector *sql.Selector) {
+			for i := range ps {
+				ps[i](selector)
+			}
+		}
+	}
+	if limit := iq.limit; limit != nil {
+		_spec.Limit = *limit
+	}
+	if offset := iq.offset; offset != nil {
+		_spec.Offset = *offset
+	}
+	if ps := iq.order; len(ps) > 0 {
+		_spec.Order = func(selector *sql.Selector) {
+			for i := range ps {
+				ps[i](selector)
+			}
+		}
+	}
+	return _spec
+}
+
+func (iq *ItemQuery) sqlQuery(ctx context.Context) *sql.Selector {
+	builder := sql.Dialect(iq.driver.Dialect())
+	t1 := builder.Table(item.Table)
+	columns := iq.fields
+	if len(columns) == 0 {
+		columns = item.Columns
+	}
+	selector := builder.Select(t1.Columns(columns...)...).From(t1)
+	if iq.sql != nil {
+		selector = iq.sql
+		selector.Select(selector.Columns(columns...)...)
+	}
+	if iq.unique != nil && *iq.unique {
+		selector.Distinct()
+	}
+	for _, p := range iq.predicates {
+		p(selector)
+	}
+	for _, p := range iq.order {
+		p(selector)
+	}
+	if offset := iq.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 := iq.limit; limit != nil {
+		selector.Limit(*limit)
+	}
+	return selector
+}
+
+// ItemGroupBy is the group-by builder for Item entities.
+type ItemGroupBy struct {
+	config
+	selector
+	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 (igb *ItemGroupBy) Aggregate(fns ...AggregateFunc) *ItemGroupBy {
+	igb.fns = append(igb.fns, fns...)
+	return igb
+}
+
+// Scan applies the group-by query and scans the result into the given value.
+func (igb *ItemGroupBy) Scan(ctx context.Context, v interface{}) error {
+	query, err := igb.path(ctx)
+	if err != nil {
+		return err
+	}
+	igb.sql = query
+	return igb.sqlScan(ctx, v)
+}
+
+func (igb *ItemGroupBy) sqlScan(ctx context.Context, v interface{}) error {
+	for _, f := range igb.fields {
+		if !item.ValidColumn(f) {
+			return &ValidationError{Name: f, err: fmt.Errorf("invalid field %q for group-by", f)}
+		}
+	}
+	selector := igb.sqlQuery()
+	if err := selector.Err(); err != nil {
+		return err
+	}
+	rows := &sql.Rows{}
+	query, args := selector.Query()
+	if err := igb.driver.Query(ctx, query, args, rows); err != nil {
+		return err
+	}
+	defer rows.Close()
+	return sql.ScanSlice(rows, v)
+}
+
+func (igb *ItemGroupBy) sqlQuery() *sql.Selector {
+	selector := igb.sql.Select()
+	aggregation := make([]string, 0, len(igb.fns))
+	for _, fn := range igb.fns {
+		aggregation = append(aggregation, fn(selector))
+	}
+	// If no columns were selected in a custom aggregation function, the default
+	// selection is the fields used for "group-by", and the aggregation functions.
+	if len(selector.SelectedColumns()) == 0 {
+		columns := make([]string, 0, len(igb.fields)+len(igb.fns))
+		for _, f := range igb.fields {
+			columns = append(columns, selector.C(f))
+		}
+		columns = append(columns, aggregation...)
+		selector.Select(columns...)
+	}
+	return selector.GroupBy(selector.Columns(igb.fields...)...)
+}
+
+// ItemSelect is the builder for selecting fields of Item entities.
+type ItemSelect struct {
+	*ItemQuery
+	selector
+	// intermediate query (i.e. traversal path).
+	sql *sql.Selector
+}
+
+// Scan applies the selector query and scans the result into the given value.
+func (is *ItemSelect) Scan(ctx context.Context, v interface{}) error {
+	if err := is.prepareQuery(ctx); err != nil {
+		return err
+	}
+	is.sql = is.ItemQuery.sqlQuery(ctx)
+	return is.sqlScan(ctx, v)
+}
+
+func (is *ItemSelect) sqlScan(ctx context.Context, v interface{}) error {
+	rows := &sql.Rows{}
+	query, args := is.sql.Query()
+	if err := is.driver.Query(ctx, query, args, rows); err != nil {
+		return err
+	}
+	defer rows.Close()
+	return sql.ScanSlice(rows, v)
+}