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query_filter_or.go
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/
query_filter_or.go
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// Copyright 2023 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package firestore
// [START firestore_query_filter_or]
import (
"context"
"fmt"
"io"
firestore "cloud.google.com/go/firestore"
"google.golang.org/api/iterator"
)
func queryFilterOr(w io.Writer, projectId string) error {
// Instantiate a client
ctx := context.Background()
client, err := firestore.NewClient(ctx, projectId)
if err != nil {
return err
}
// always be sure to close the client to release resources
defer client.Close()
q1 := firestore.PropertyFilter{
Path: "birthYear",
Operator: "==",
Value: 1906,
}
q2 := firestore.PropertyFilter{
Path: "birthYear",
Operator: "==",
Value: 1815,
}
orFilter := firestore.OrFilter{
Filters: []firestore.EntityFilter{q1, q2},
}
orQuery := client.Collection("users").WhereEntity(orFilter)
it := orQuery.Documents(ctx)
if err != nil {
return err
}
fmt.Fprint(w, "Individual documents:\n")
for {
doc, err := it.Next()
if err == iterator.Done {
break
}
if err != nil {
return fmt.Errorf("documents iterator: %w", err)
}
fmt.Fprintf(w, "%s: %s", doc.Ref.ID, doc.Data()["birthYear"])
}
return nil
}
// [END firestore_query_filter_or]