// Next returns the ID of the next result. When there are no more results,
// Done is returned as the error.
//
// dst must be a non-nil struct pointer or a nil interface value. If a
// non-nil struct pointer is provided, that struct will be filled with the
// indexed fields.
func (t *Iterator) Next(dst interface{}) (string, error) {
if t.err == nil && len(t.listRes)+len(t.searchRes) == 0 && t.more != nil {
t.err = t.more(t)
}
if t.err != nil {
return "", t.err
}
var doc *pb.Document
switch {
case len(t.listRes) != 0:
doc = t.listRes[0]
t.listRes = t.listRes[1:]
case len(t.searchRes) != 0:
doc = t.searchRes[0].Document
t.searchRes = t.searchRes[1:]
default:
return "", Done
}
if doc == nil {
return "", errors.New("search: internal error: no document returned")
}
if dst != nil {
if err := loadFields(dst, doc.Field); err != nil {
return "", err
}
}
return doc.GetId(), nil
}
// Next returns the ID of the next result. When there are no more results,
// Done is returned as the error.
//
// dst must be a non-nil struct pointer, implement the FieldLoadSaver or
// FieldMetadataLoadSaver interface, or be a nil interface value. If a non-nil
// dst is provided, it will be filled with the indexed fields. dst is ignored
// if this iterator was created with an IDsOnly option.
func (t *Iterator) Next(dst interface{}) (string, error) {
t.fetchMore()
if t.err != nil {
return "", t.err
}
var doc *pb.Document
var exprs []*pb.Field
switch {
case len(t.listRes) != 0:
doc = t.listRes[0]
t.listRes = t.listRes[1:]
case len(t.searchRes) != 0:
doc = t.searchRes[0].Document
exprs = t.searchRes[0].Expression
t.searchCursor = t.searchRes[0].Cursor
t.searchRes = t.searchRes[1:]
default:
return "", Done
}
if doc == nil {
return "", errors.New("search: internal error: no document returned")
}
if !t.idsOnly && dst != nil {
if err := loadDoc(dst, doc, exprs); err != nil {
return "", err
}
}
return doc.GetId(), nil
}
// Next returns the ID of the next result. When there are no more results,
// Done is returned as the error.
//
// dst must be a non-nil struct pointer, implement the FieldLoadSaver or
// FieldMetadataLoadSaver interface, or be a nil interface value. If a non-nil
// dst is provided, it will be filled with the indexed fields. dst is ignored
// if this iterator was created with an IDsOnly option.
func (t *Iterator) Next(dst interface{}) (string, error) {
if t.err == nil && len(t.listRes)+len(t.searchRes) == 0 && t.more != nil {
t.err = t.more(t)
}
if t.err != nil {
return "", t.err
}
var doc *pb.Document
var exprs []*pb.Field
switch {
case len(t.listRes) != 0:
doc = t.listRes[0]
t.listRes = t.listRes[1:]
case len(t.searchRes) != 0:
doc = t.searchRes[0].Document
exprs = t.searchRes[0].Expression
t.searchRes = t.searchRes[1:]
default:
return "", Done
}
if doc == nil {
return "", errors.New("search: internal error: no document returned")
}
if !t.idsOnly && dst != nil {
metadata := &DocumentMetadata{
Rank: int(doc.GetOrderId()),
}
if err := loadDoc(dst, doc.Field, exprs, metadata); err != nil {
return "", err
}
}
if t.limit > 0 {
t.limit--
if t.limit == 0 {
t.more = nil // prevent further fetches
}
}
return doc.GetId(), nil
}