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homebox/backend/ent/item_query.go

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// 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)
}