// Range returns one or more records by the specified index within the specified range
func (n *node) Range(fieldName string, min, max, to interface{}, options ...func(*index.Options)) error {
sink, err := newListSink(n, to)
if err != nil {
return err
}
bucketName := sink.bucketName()
if bucketName == "" {
return ErrNoName
}
ref := reflect.Indirect(reflect.New(sink.elemType))
cfg, err := extractSingleField(&ref, fieldName)
if err != nil {
return err
}
opts := index.NewOptions()
for _, fn := range options {
fn(opts)
}
field, ok := cfg.Fields[fieldName]
if !ok || (!field.IsID && field.Index == "") {
sink.limit = opts.Limit
sink.skip = opts.Skip
query := newQuery(n, q.And(q.Gte(fieldName, min), q.Lte(fieldName, max)))
if opts.Reverse {
query.Reverse()
}
err = n.readTx(func(tx *bolt.Tx) error {
return query.query(tx, sink)
})
if err != nil {
return err
}
return sink.flush()
}
mn, err := toBytes(min, n.s.codec)
if err != nil {
return err
}
mx, err := toBytes(max, n.s.codec)
if err != nil {
return err
}
return n.readTx(func(tx *bolt.Tx) error {
return n.rnge(tx, bucketName, fieldName, cfg, sink, mn, mx, opts)
})
}
// Select a list of records that match a list of matchers. Doesn't use indexes.
func (n *node) Select(matchers ...q.Matcher) Query {
tree := q.And(matchers...)
return newQuery(n, tree)
}