// 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/homebox/backend/internal/data/ent/group" "github.com/hay-kot/homebox/backend/internal/data/ent/item" "github.com/hay-kot/homebox/backend/internal/data/ent/location" "github.com/hay-kot/homebox/backend/internal/data/ent/predicate" ) // LocationQuery is the builder for querying Location entities. type LocationQuery struct { config ctx *QueryContext order []OrderFunc inters []Interceptor predicates []predicate.Location withParent *LocationQuery withChildren *LocationQuery withGroup *GroupQuery withItems *ItemQuery 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 LocationQuery builder. func (lq *LocationQuery) Where(ps ...predicate.Location) *LocationQuery { lq.predicates = append(lq.predicates, ps...) return lq } // Limit the number of records to be returned by this query. func (lq *LocationQuery) Limit(limit int) *LocationQuery { lq.ctx.Limit = &limit return lq } // Offset to start from. func (lq *LocationQuery) Offset(offset int) *LocationQuery { lq.ctx.Offset = &offset return lq } // 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 (lq *LocationQuery) Unique(unique bool) *LocationQuery { lq.ctx.Unique = &unique return lq } // Order specifies how the records should be ordered. func (lq *LocationQuery) Order(o ...OrderFunc) *LocationQuery { lq.order = append(lq.order, o...) return lq } // QueryParent chains the current query on the "parent" edge. func (lq *LocationQuery) QueryParent() *LocationQuery { query := (&LocationClient{config: lq.config}).Query() query.path = func(ctx context.Context) (fromU *sql.Selector, err error) { if err := lq.prepareQuery(ctx); err != nil { return nil, err } selector := lq.sqlQuery(ctx) if err := selector.Err(); err != nil { return nil, err } step := sqlgraph.NewStep( sqlgraph.From(location.Table, location.FieldID, selector), sqlgraph.To(location.Table, location.FieldID), sqlgraph.Edge(sqlgraph.M2O, true, location.ParentTable, location.ParentColumn), ) fromU = sqlgraph.SetNeighbors(lq.driver.Dialect(), step) return fromU, nil } return query } // QueryChildren chains the current query on the "children" edge. func (lq *LocationQuery) QueryChildren() *LocationQuery { query := (&LocationClient{config: lq.config}).Query() query.path = func(ctx context.Context) (fromU *sql.Selector, err error) { if err := lq.prepareQuery(ctx); err != nil { return nil, err } selector := lq.sqlQuery(ctx) if err := selector.Err(); err != nil { return nil, err } step := sqlgraph.NewStep( sqlgraph.From(location.Table, location.FieldID, selector), sqlgraph.To(location.Table, location.FieldID), sqlgraph.Edge(sqlgraph.O2M, false, location.ChildrenTable, location.ChildrenColumn), ) fromU = sqlgraph.SetNeighbors(lq.driver.Dialect(), step) return fromU, nil } return query } // QueryGroup chains the current query on the "group" edge. func (lq *LocationQuery) QueryGroup() *GroupQuery { query := (&GroupClient{config: lq.config}).Query() query.path = func(ctx context.Context) (fromU *sql.Selector, err error) { if err := lq.prepareQuery(ctx); err != nil { return nil, err } selector := lq.sqlQuery(ctx) if err := selector.Err(); err != nil { return nil, err } step := sqlgraph.NewStep( sqlgraph.From(location.Table, location.FieldID, selector), sqlgraph.To(group.Table, group.FieldID), sqlgraph.Edge(sqlgraph.M2O, true, location.GroupTable, location.GroupColumn), ) fromU = sqlgraph.SetNeighbors(lq.driver.Dialect(), step) return fromU, nil } return query } // QueryItems chains the current query on the "items" edge. func (lq *LocationQuery) QueryItems() *ItemQuery { query := (&ItemClient{config: lq.config}).Query() query.path = func(ctx context.Context) (fromU *sql.Selector, err error) { if err := lq.prepareQuery(ctx); err != nil { return nil, err } selector := lq.sqlQuery(ctx) if err := selector.Err(); err != nil { return nil, err } step := sqlgraph.NewStep( sqlgraph.From(location.Table, location.FieldID, selector), sqlgraph.To(item.Table, item.FieldID), sqlgraph.Edge(sqlgraph.O2M, false, location.ItemsTable, location.ItemsColumn), ) fromU = sqlgraph.SetNeighbors(lq.driver.Dialect(), step) return fromU, nil } return query } // First returns the first Location entity from the query. // Returns a *NotFoundError when no Location was found. func (lq *LocationQuery) First(ctx context.Context) (*Location, error) { nodes, err := lq.Limit(1).All(setContextOp(ctx, lq.ctx, "First")) if err != nil { return nil, err } if len(nodes) == 0 { return nil, &NotFoundError{location.Label} } return nodes[0], nil } // FirstX is like First, but panics if an error occurs. func (lq *LocationQuery) FirstX(ctx context.Context) *Location { node, err := lq.First(ctx) if err != nil && !IsNotFound(err) { panic(err) } return node } // FirstID returns the first Location ID from the query. // Returns a *NotFoundError when no Location ID was found. func (lq *LocationQuery) FirstID(ctx context.Context) (id uuid.UUID, err error) { var ids []uuid.UUID if ids, err = lq.Limit(1).IDs(setContextOp(ctx, lq.ctx, "FirstID")); err != nil { return } if len(ids) == 0 { err = &NotFoundError{location.Label} return } return ids[0], nil } // FirstIDX is like FirstID, but panics if an error occurs. func (lq *LocationQuery) FirstIDX(ctx context.Context) uuid.UUID { id, err := lq.FirstID(ctx) if err != nil && !IsNotFound(err) { panic(err) } return id } // Only returns a single Location entity found by the query, ensuring it only returns one. // Returns a *NotSingularError when more than one Location entity is found. // Returns a *NotFoundError when no Location entities are found. func (lq *LocationQuery) Only(ctx context.Context) (*Location, error) { nodes, err := lq.Limit(2).All(setContextOp(ctx, lq.ctx, "Only")) if err != nil { return nil, err } switch len(nodes) { case 1: return nodes[0], nil case 0: return nil, &NotFoundError{location.Label} default: return nil, &NotSingularError{location.Label} } } // OnlyX is like Only, but panics if an error occurs. func (lq *LocationQuery) OnlyX(ctx context.Context) *Location { node, err := lq.Only(ctx) if err != nil { panic(err) } return node } // OnlyID is like Only, but returns the only Location ID in the query. // Returns a *NotSingularError when more than one Location ID is found. // Returns a *NotFoundError when no entities are found. func (lq *LocationQuery) OnlyID(ctx context.Context) (id uuid.UUID, err error) { var ids []uuid.UUID if ids, err = lq.Limit(2).IDs(setContextOp(ctx, lq.ctx, "OnlyID")); err != nil { return } switch len(ids) { case 1: id = ids[0] case 0: err = &NotFoundError{location.Label} default: err = &NotSingularError{location.Label} } return } // OnlyIDX is like OnlyID, but panics if an error occurs. func (lq *LocationQuery) OnlyIDX(ctx context.Context) uuid.UUID { id, err := lq.OnlyID(ctx) if err != nil { panic(err) } return id } // All executes the query and returns a list of Locations. func (lq *LocationQuery) All(ctx context.Context) ([]*Location, error) { ctx = setContextOp(ctx, lq.ctx, "All") if err := lq.prepareQuery(ctx); err != nil { return nil, err } qr := querierAll[[]*Location, *LocationQuery]() return withInterceptors[[]*Location](ctx, lq, qr, lq.inters) } // AllX is like All, but panics if an error occurs. func (lq *LocationQuery) AllX(ctx context.Context) []*Location { nodes, err := lq.All(ctx) if err != nil { panic(err) } return nodes } // IDs executes the query and returns a list of Location IDs. func (lq *LocationQuery) IDs(ctx context.Context) (ids []uuid.UUID, err error) { if lq.ctx.Unique == nil && lq.path != nil { lq.Unique(true) } ctx = setContextOp(ctx, lq.ctx, "IDs") if err = lq.Select(location.FieldID).Scan(ctx, &ids); err != nil { return nil, err } return ids, nil } // IDsX is like IDs, but panics if an error occurs. func (lq *LocationQuery) IDsX(ctx context.Context) []uuid.UUID { ids, err := lq.IDs(ctx) if err != nil { panic(err) } return ids } // Count returns the count of the given query. func (lq *LocationQuery) Count(ctx context.Context) (int, error) { ctx = setContextOp(ctx, lq.ctx, "Count") if err := lq.prepareQuery(ctx); err != nil { return 0, err } return withInterceptors[int](ctx, lq, querierCount[*LocationQuery](), lq.inters) } // CountX is like Count, but panics if an error occurs. func (lq *LocationQuery) CountX(ctx context.Context) int { count, err := lq.Count(ctx) if err != nil { panic(err) } return count } // Exist returns true if the query has elements in the graph. func (lq *LocationQuery) Exist(ctx context.Context) (bool, error) { ctx = setContextOp(ctx, lq.ctx, "Exist") switch _, err := lq.FirstID(ctx); { case IsNotFound(err): return false, nil case err != nil: return false, fmt.Errorf("ent: check existence: %w", err) default: return true, nil } } // ExistX is like Exist, but panics if an error occurs. func (lq *LocationQuery) ExistX(ctx context.Context) bool { exist, err := lq.Exist(ctx) if err != nil { panic(err) } return exist } // Clone returns a duplicate of the LocationQuery builder, including all associated steps. It can be // used to prepare common query builders and use them differently after the clone is made. func (lq *LocationQuery) Clone() *LocationQuery { if lq == nil { return nil } return &LocationQuery{ config: lq.config, ctx: lq.ctx.Clone(), order: append([]OrderFunc{}, lq.order...), inters: append([]Interceptor{}, lq.inters...), predicates: append([]predicate.Location{}, lq.predicates...), withParent: lq.withParent.Clone(), withChildren: lq.withChildren.Clone(), withGroup: lq.withGroup.Clone(), withItems: lq.withItems.Clone(), // clone intermediate query. sql: lq.sql.Clone(), path: lq.path, } } // WithParent tells the query-builder to eager-load the nodes that are connected to // the "parent" edge. The optional arguments are used to configure the query builder of the edge. func (lq *LocationQuery) WithParent(opts ...func(*LocationQuery)) *LocationQuery { query := (&LocationClient{config: lq.config}).Query() for _, opt := range opts { opt(query) } lq.withParent = query return lq } // WithChildren tells the query-builder to eager-load the nodes that are connected to // the "children" edge. The optional arguments are used to configure the query builder of the edge. func (lq *LocationQuery) WithChildren(opts ...func(*LocationQuery)) *LocationQuery { query := (&LocationClient{config: lq.config}).Query() for _, opt := range opts { opt(query) } lq.withChildren = query return lq } // 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 (lq *LocationQuery) WithGroup(opts ...func(*GroupQuery)) *LocationQuery { query := (&GroupClient{config: lq.config}).Query() for _, opt := range opts { opt(query) } lq.withGroup = query return lq } // WithItems tells the query-builder to eager-load the nodes that are connected to // the "items" edge. The optional arguments are used to configure the query builder of the edge. func (lq *LocationQuery) WithItems(opts ...func(*ItemQuery)) *LocationQuery { query := (&ItemClient{config: lq.config}).Query() for _, opt := range opts { opt(query) } lq.withItems = query return lq } // 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.Location.Query(). // GroupBy(location.FieldCreatedAt). // Aggregate(ent.Count()). // Scan(ctx, &v) func (lq *LocationQuery) GroupBy(field string, fields ...string) *LocationGroupBy { lq.ctx.Fields = append([]string{field}, fields...) grbuild := &LocationGroupBy{build: lq} grbuild.flds = &lq.ctx.Fields grbuild.label = location.Label grbuild.scan = 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.Location.Query(). // Select(location.FieldCreatedAt). // Scan(ctx, &v) func (lq *LocationQuery) Select(fields ...string) *LocationSelect { lq.ctx.Fields = append(lq.ctx.Fields, fields...) sbuild := &LocationSelect{LocationQuery: lq} sbuild.label = location.Label sbuild.flds, sbuild.scan = &lq.ctx.Fields, sbuild.Scan return sbuild } // Aggregate returns a LocationSelect configured with the given aggregations. func (lq *LocationQuery) Aggregate(fns ...AggregateFunc) *LocationSelect { return lq.Select().Aggregate(fns...) } func (lq *LocationQuery) prepareQuery(ctx context.Context) error { for _, inter := range lq.inters { if inter == nil { return fmt.Errorf("ent: uninitialized interceptor (forgotten import ent/runtime?)") } if trv, ok := inter.(Traverser); ok { if err := trv.Traverse(ctx, lq); err != nil { return err } } } for _, f := range lq.ctx.Fields { if !location.ValidColumn(f) { return &ValidationError{Name: f, err: fmt.Errorf("ent: invalid field %q for query", f)} } } if lq.path != nil { prev, err := lq.path(ctx) if err != nil { return err } lq.sql = prev } return nil } func (lq *LocationQuery) sqlAll(ctx context.Context, hooks ...queryHook) ([]*Location, error) { var ( nodes = []*Location{} withFKs = lq.withFKs _spec = lq.querySpec() loadedTypes = [4]bool{ lq.withParent != nil, lq.withChildren != nil, lq.withGroup != nil, lq.withItems != nil, } ) if lq.withParent != nil || lq.withGroup != nil { withFKs = true } if withFKs { _spec.Node.Columns = append(_spec.Node.Columns, location.ForeignKeys...) } _spec.ScanValues = func(columns []string) ([]any, error) { return (*Location).scanValues(nil, columns) } _spec.Assign = func(columns []string, values []any) error { node := &Location{config: lq.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, lq.driver, _spec); err != nil { return nil, err } if len(nodes) == 0 { return nodes, nil } if query := lq.withParent; query != nil { if err := lq.loadParent(ctx, query, nodes, nil, func(n *Location, e *Location) { n.Edges.Parent = e }); err != nil { return nil, err } } if query := lq.withChildren; query != nil { if err := lq.loadChildren(ctx, query, nodes, func(n *Location) { n.Edges.Children = []*Location{} }, func(n *Location, e *Location) { n.Edges.Children = append(n.Edges.Children, e) }); err != nil { return nil, err } } if query := lq.withGroup; query != nil { if err := lq.loadGroup(ctx, query, nodes, nil, func(n *Location, e *Group) { n.Edges.Group = e }); err != nil { return nil, err } } if query := lq.withItems; query != nil { if err := lq.loadItems(ctx, query, nodes, func(n *Location) { n.Edges.Items = []*Item{} }, func(n *Location, e *Item) { n.Edges.Items = append(n.Edges.Items, e) }); err != nil { return nil, err } } return nodes, nil } func (lq *LocationQuery) loadParent(ctx context.Context, query *LocationQuery, nodes []*Location, init func(*Location), assign func(*Location, *Location)) error { ids := make([]uuid.UUID, 0, len(nodes)) nodeids := make(map[uuid.UUID][]*Location) for i := range nodes { if nodes[i].location_children == nil { continue } fk := *nodes[i].location_children if _, ok := nodeids[fk]; !ok { ids = append(ids, fk) } nodeids[fk] = append(nodeids[fk], nodes[i]) } if len(ids) == 0 { return nil } 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_children" returned %v`, n.ID) } for i := range nodes { assign(nodes[i], n) } } return nil } func (lq *LocationQuery) loadChildren(ctx context.Context, query *LocationQuery, nodes []*Location, init func(*Location), assign func(*Location, *Location)) error { fks := make([]driver.Value, 0, len(nodes)) nodeids := make(map[uuid.UUID]*Location) 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.Location(func(s *sql.Selector) { s.Where(sql.InValues(location.ChildrenColumn, fks...)) })) neighbors, err := query.All(ctx) if err != nil { return err } for _, n := range neighbors { fk := n.location_children if fk == nil { return fmt.Errorf(`foreign-key "location_children" is nil for node %v`, n.ID) } node, ok := nodeids[*fk] if !ok { return fmt.Errorf(`unexpected foreign-key "location_children" returned %v for node %v`, *fk, n.ID) } assign(node, n) } return nil } func (lq *LocationQuery) loadGroup(ctx context.Context, query *GroupQuery, nodes []*Location, init func(*Location), assign func(*Location, *Group)) error { ids := make([]uuid.UUID, 0, len(nodes)) nodeids := make(map[uuid.UUID][]*Location) for i := range nodes { if nodes[i].group_locations == nil { continue } fk := *nodes[i].group_locations if _, ok := nodeids[fk]; !ok { ids = append(ids, fk) } nodeids[fk] = append(nodeids[fk], nodes[i]) } if len(ids) == 0 { return nil } 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_locations" returned %v`, n.ID) } for i := range nodes { assign(nodes[i], n) } } return nil } func (lq *LocationQuery) loadItems(ctx context.Context, query *ItemQuery, nodes []*Location, init func(*Location), assign func(*Location, *Item)) error { fks := make([]driver.Value, 0, len(nodes)) nodeids := make(map[uuid.UUID]*Location) 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.Item(func(s *sql.Selector) { s.Where(sql.InValues(location.ItemsColumn, fks...)) })) neighbors, err := query.All(ctx) if err != nil { return err } for _, n := range neighbors { fk := n.location_items if fk == nil { return fmt.Errorf(`foreign-key "location_items" is nil for node %v`, n.ID) } node, ok := nodeids[*fk] if !ok { return fmt.Errorf(`unexpected foreign-key "location_items" returned %v for node %v`, *fk, n.ID) } assign(node, n) } return nil } func (lq *LocationQuery) sqlCount(ctx context.Context) (int, error) { _spec := lq.querySpec() _spec.Node.Columns = lq.ctx.Fields if len(lq.ctx.Fields) > 0 { _spec.Unique = lq.ctx.Unique != nil && *lq.ctx.Unique } return sqlgraph.CountNodes(ctx, lq.driver, _spec) } func (lq *LocationQuery) querySpec() *sqlgraph.QuerySpec { _spec := sqlgraph.NewQuerySpec(location.Table, location.Columns, sqlgraph.NewFieldSpec(location.FieldID, field.TypeUUID)) _spec.From = lq.sql if unique := lq.ctx.Unique; unique != nil { _spec.Unique = *unique } else if lq.path != nil { _spec.Unique = true } if fields := lq.ctx.Fields; len(fields) > 0 { _spec.Node.Columns = make([]string, 0, len(fields)) _spec.Node.Columns = append(_spec.Node.Columns, location.FieldID) for i := range fields { if fields[i] != location.FieldID { _spec.Node.Columns = append(_spec.Node.Columns, fields[i]) } } } if ps := lq.predicates; len(ps) > 0 { _spec.Predicate = func(selector *sql.Selector) { for i := range ps { ps[i](selector) } } } if limit := lq.ctx.Limit; limit != nil { _spec.Limit = *limit } if offset := lq.ctx.Offset; offset != nil { _spec.Offset = *offset } if ps := lq.order; len(ps) > 0 { _spec.Order = func(selector *sql.Selector) { for i := range ps { ps[i](selector) } } } return _spec } func (lq *LocationQuery) sqlQuery(ctx context.Context) *sql.Selector { builder := sql.Dialect(lq.driver.Dialect()) t1 := builder.Table(location.Table) columns := lq.ctx.Fields if len(columns) == 0 { columns = location.Columns } selector := builder.Select(t1.Columns(columns...)...).From(t1) if lq.sql != nil { selector = lq.sql selector.Select(selector.Columns(columns...)...) } if lq.ctx.Unique != nil && *lq.ctx.Unique { selector.Distinct() } for _, p := range lq.predicates { p(selector) } for _, p := range lq.order { p(selector) } if offset := lq.ctx.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 := lq.ctx.Limit; limit != nil { selector.Limit(*limit) } return selector } // LocationGroupBy is the group-by builder for Location entities. type LocationGroupBy struct { selector build *LocationQuery } // Aggregate adds the given aggregation functions to the group-by query. func (lgb *LocationGroupBy) Aggregate(fns ...AggregateFunc) *LocationGroupBy { lgb.fns = append(lgb.fns, fns...) return lgb } // Scan applies the selector query and scans the result into the given value. func (lgb *LocationGroupBy) Scan(ctx context.Context, v any) error { ctx = setContextOp(ctx, lgb.build.ctx, "GroupBy") if err := lgb.build.prepareQuery(ctx); err != nil { return err } return scanWithInterceptors[*LocationQuery, *LocationGroupBy](ctx, lgb.build, lgb, lgb.build.inters, v) } func (lgb *LocationGroupBy) sqlScan(ctx context.Context, root *LocationQuery, v any) error { selector := root.sqlQuery(ctx).Select() aggregation := make([]string, 0, len(lgb.fns)) for _, fn := range lgb.fns { aggregation = append(aggregation, fn(selector)) } if len(selector.SelectedColumns()) == 0 { columns := make([]string, 0, len(*lgb.flds)+len(lgb.fns)) for _, f := range *lgb.flds { columns = append(columns, selector.C(f)) } columns = append(columns, aggregation...) selector.Select(columns...) } selector.GroupBy(selector.Columns(*lgb.flds...)...) if err := selector.Err(); err != nil { return err } rows := &sql.Rows{} query, args := selector.Query() if err := lgb.build.driver.Query(ctx, query, args, rows); err != nil { return err } defer rows.Close() return sql.ScanSlice(rows, v) } // LocationSelect is the builder for selecting fields of Location entities. type LocationSelect struct { *LocationQuery selector } // Aggregate adds the given aggregation functions to the selector query. func (ls *LocationSelect) Aggregate(fns ...AggregateFunc) *LocationSelect { ls.fns = append(ls.fns, fns...) return ls } // Scan applies the selector query and scans the result into the given value. func (ls *LocationSelect) Scan(ctx context.Context, v any) error { ctx = setContextOp(ctx, ls.ctx, "Select") if err := ls.prepareQuery(ctx); err != nil { return err } return scanWithInterceptors[*LocationQuery, *LocationSelect](ctx, ls.LocationQuery, ls, ls.inters, v) } func (ls *LocationSelect) sqlScan(ctx context.Context, root *LocationQuery, v any) error { selector := root.sqlQuery(ctx) aggregation := make([]string, 0, len(ls.fns)) for _, fn := range ls.fns { aggregation = append(aggregation, fn(selector)) } switch n := len(*ls.selector.flds); { case n == 0 && len(aggregation) > 0: selector.Select(aggregation...) case n != 0 && len(aggregation) > 0: selector.AppendSelect(aggregation...) } rows := &sql.Rows{} query, args := selector.Query() if err := ls.driver.Query(ctx, query, args, rows); err != nil { return err } defer rows.Close() return sql.ScanSlice(rows, v) }