func (tf *typeFilter) Load(props []datastore.Property) error {
tf.pm = make(ds.PropertyMap, len(props))
for _, p := range props {
val := p.Value
switch x := val.(type) {
case datastore.ByteString:
val = []byte(x)
case *datastore.Key:
val = dsR2F(x)
case appengine.BlobKey:
val = bs.Key(x)
case appengine.GeoPoint:
val = ds.GeoPoint(x)
case time.Time:
// "appengine" layer instantiates with Local timezone.
val = x.UTC()
default:
val = maybeIndexValue(val)
}
prop := ds.Property{}
is := ds.ShouldIndex
if p.NoIndex {
is = ds.NoIndex
}
if err := prop.SetValue(val, is); err != nil {
return err
}
tf.pm[p.Name] = append(tf.pm[p.Name], prop)
}
return nil
}
func dsR2FProp(in datastore.Property) (ds.Property, error) {
val := in.Value
switch x := val.(type) {
case datastore.ByteString:
val = []byte(x)
case *datastore.Key:
val = dsR2F(x)
case appengine.BlobKey:
val = bs.Key(x)
case appengine.GeoPoint:
val = ds.GeoPoint(x)
case time.Time:
// "appengine" layer instantiates with Local timezone.
if x.IsZero() {
val = time.Time{}
} else {
val = x.UTC()
}
default:
val = maybeIndexValue(val)
}
ret := ds.Property{}
is := ds.ShouldIndex
if in.NoIndex {
is = ds.NoIndex
}
err := ret.SetValue(val, is)
return ret, err
}
func (q *queryImpl) Filter(fStr string, val interface{}) ds.Query {
prop := ""
op := qInvalid
p := ds.Property{}
return q.checkMutateClone(
func() error {
var err error
prop, op, err = parseFilter(fStr)
if err != nil {
return err
}
if q.kind == "" && prop != "__key__" {
// https://cloud.google.com/appengine/docs/go/datastore/queries#Go_Kindless_queries
return fmt.Errorf(
"kindless queries can only filter on __key__, got %q", fStr)
}
err = p.SetValue(val, ds.ShouldIndex)
if err != nil {
return err
}
if p.Type() == ds.PTKey {
if !p.Value().(ds.Key).Valid(false, globalAppID, q.ns) {
return ds.ErrInvalidKey
}
}
if prop == "__key__" {
if op == qEqual {
return fmt.Errorf(
"query equality filter on __key__ is silly: %q", fStr)
}
if p.Type() != ds.PTKey {
return fmt.Errorf("__key__ filter value is not a key: %T", val)
}
} else if strings.HasPrefix(prop, "__") && strings.HasSuffix(prop, "__") {
return fmt.Errorf("filter on reserved property: %q", prop)
}
if op != qEqual {
if q.ineqFilter.prop != "" && q.ineqFilter.prop != prop {
return fmt.Errorf(
"inequality filters on multiple properties: %q and %q",
q.ineqFilter.prop, prop)
}
if len(q.order) > 0 && q.order[0].Property != prop {
return fmt.Errorf(
"first sort order must match inequality filter: %q v %q",
q.order[0].Property, prop)
}
} else {
for _, p := range q.project {
if p == prop {
return fmt.Errorf(
"cannot project on field which is used in an equality filter: %q",
prop)
}
}
}
return err
},
func(q *queryImpl) {
if op == qEqual {
// add it to eq filters
q.addEqFilt(prop, p)
// remove it from sort orders.
// https://cloud.google.com/appengine/docs/go/datastore/queries#sort_orders_are_ignored_on_properties_with_equality_filters
toRm := -1
for i, o := range q.order {
if o.Property == prop {
toRm = i
break
}
}
if toRm >= 0 {
q.order = append(q.order[:toRm], q.order[toRm+1:]...)
}
} else {
q.ineqFilter.prop = prop
if q.ineqFilter.constrain(op, serialize.ToBytes(p)) {
q.err = errQueryDone
}
}
})
}
