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6427029c4e
* Update all dependencies * Remove all `[[constraint]]` from Gopkg.toml * Add in the minimum number of `[[override]]` to build * Remove go get of github.com/inconshreveable/mousetrap as it is vendored * Update docs with new policy on constraints
529 lines
12 KiB
Go
529 lines
12 KiB
Go
// Copyright 2017 Google Inc. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// TODO(jba): add Output comments to examples when feasible.
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package firestore_test
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import (
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"fmt"
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"cloud.google.com/go/firestore"
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"golang.org/x/net/context"
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"google.golang.org/api/iterator"
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)
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func ExampleNewClient() {
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ctx := context.Background()
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client, err := firestore.NewClient(ctx, "project-id")
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if err != nil {
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// TODO: Handle error.
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}
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defer client.Close() // Close client when done.
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_ = client // TODO: Use client.
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}
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func ExampleClient_Collection() {
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ctx := context.Background()
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client, err := firestore.NewClient(ctx, "project-id")
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if err != nil {
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// TODO: Handle error.
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}
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defer client.Close()
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coll1 := client.Collection("States")
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coll2 := client.Collection("States/NewYork/Cities")
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fmt.Println(coll1, coll2)
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}
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func ExampleClient_Doc() {
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ctx := context.Background()
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client, err := firestore.NewClient(ctx, "project-id")
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if err != nil {
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// TODO: Handle error.
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}
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defer client.Close()
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doc1 := client.Doc("States/NewYork")
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doc2 := client.Doc("States/NewYork/Cities/Albany")
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fmt.Println(doc1, doc2)
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}
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func ExampleClient_GetAll() {
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ctx := context.Background()
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client, err := firestore.NewClient(ctx, "project-id")
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if err != nil {
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// TODO: Handle error.
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}
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defer client.Close()
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docs, err := client.GetAll(ctx, []*firestore.DocumentRef{
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client.Doc("States/NorthCarolina"),
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client.Doc("States/SouthCarolina"),
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client.Doc("States/WestCarolina"),
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client.Doc("States/EastCarolina"),
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})
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if err != nil {
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// TODO: Handle error.
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}
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// docs is a slice with four DocumentSnapshots, but the last two are
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// nil because there is no West or East Carolina.
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fmt.Println(docs)
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}
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func ExampleClient_Batch() {
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ctx := context.Background()
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client, err := firestore.NewClient(ctx, "project-id")
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if err != nil {
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// TODO: Handle error.
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}
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defer client.Close()
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b := client.Batch()
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_ = b // TODO: Use batch.
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}
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func ExampleWriteBatch_Commit() {
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ctx := context.Background()
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client, err := firestore.NewClient(ctx, "project-id")
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if err != nil {
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// TODO: Handle error.
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}
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defer client.Close()
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type State struct {
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Capital string `firestore:"capital"`
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Population float64 `firestore:"pop"` // in millions
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}
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ny := client.Doc("States/NewYork")
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ca := client.Doc("States/California")
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writeResults, err := client.Batch().
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Create(ny, State{Capital: "Albany", Population: 19.8}).
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Set(ca, State{Capital: "Sacramento", Population: 39.14}).
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Delete(client.Doc("States/WestDakota")).
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Commit(ctx)
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if err != nil {
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// TODO: Handle error.
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}
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fmt.Println(writeResults)
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}
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func ExampleCollectionRef_Add() {
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ctx := context.Background()
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client, err := firestore.NewClient(ctx, "project-id")
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if err != nil {
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// TODO: Handle error.
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}
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defer client.Close()
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doc, wr, err := client.Collection("Users").Add(ctx, map[string]interface{}{
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"name": "Alice",
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"email": "aj@example.com",
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})
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if err != nil {
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// TODO: Handle error.
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}
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fmt.Println(doc, wr)
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}
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func ExampleCollectionRef_Doc() {
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ctx := context.Background()
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client, err := firestore.NewClient(ctx, "project-id")
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if err != nil {
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// TODO: Handle error.
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}
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defer client.Close()
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fl := client.Collection("States").Doc("Florida")
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ta := client.Collection("States").Doc("Florida/Cities/Tampa")
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fmt.Println(fl, ta)
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}
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func ExampleCollectionRef_NewDoc() {
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ctx := context.Background()
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client, err := firestore.NewClient(ctx, "project-id")
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if err != nil {
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// TODO: Handle error.
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}
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defer client.Close()
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doc := client.Collection("Users").NewDoc()
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fmt.Println(doc)
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}
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func ExampleDocumentRef_Collection() {
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ctx := context.Background()
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client, err := firestore.NewClient(ctx, "project-id")
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if err != nil {
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// TODO: Handle error.
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}
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defer client.Close()
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mi := client.Collection("States").Doc("Michigan")
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cities := mi.Collection("Cities")
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fmt.Println(cities)
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}
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func ExampleDocumentRef_Create_map() {
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ctx := context.Background()
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client, err := firestore.NewClient(ctx, "project-id")
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if err != nil {
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// TODO: Handle error.
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}
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defer client.Close()
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wr, err := client.Doc("States/Colorado").Create(ctx, map[string]interface{}{
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"capital": "Denver",
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"pop": 5.5,
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})
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if err != nil {
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// TODO: Handle error.
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}
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fmt.Println(wr.UpdateTime)
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}
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func ExampleDocumentRef_Create_struct() {
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ctx := context.Background()
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client, err := firestore.NewClient(ctx, "project-id")
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if err != nil {
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// TODO: Handle error.
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}
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defer client.Close()
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type State struct {
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Capital string `firestore:"capital"`
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Population float64 `firestore:"pop"` // in millions
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}
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wr, err := client.Doc("States/Colorado").Create(ctx, State{
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Capital: "Denver",
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Population: 5.5,
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})
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if err != nil {
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// TODO: Handle error.
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}
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fmt.Println(wr.UpdateTime)
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}
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func ExampleDocumentRef_Set() {
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ctx := context.Background()
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client, err := firestore.NewClient(ctx, "project-id")
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if err != nil {
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// TODO: Handle error.
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}
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defer client.Close()
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// Overwrite the document with the given data. Any other fields currently
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// in the document will be removed.
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wr, err := client.Doc("States/Alabama").Set(ctx, map[string]interface{}{
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"capital": "Montgomery",
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"pop": 4.9,
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})
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if err != nil {
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// TODO: Handle error.
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}
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fmt.Println(wr.UpdateTime)
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}
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func ExampleDocumentRef_Set_merge() {
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ctx := context.Background()
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client, err := firestore.NewClient(ctx, "project-id")
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if err != nil {
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// TODO: Handle error.
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}
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defer client.Close()
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// Overwrite only the fields in the map; preserve all others.
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_, err = client.Doc("States/Alabama").Set(ctx, map[string]interface{}{
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"pop": 5.2,
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}, firestore.MergeAll)
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if err != nil {
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// TODO: Handle error.
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}
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type State struct {
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Capital string `firestore:"capital"`
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Population float64 `firestore:"pop"` // in millions
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}
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// To do a merging Set with struct data, specify the exact fields to overwrite.
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// MergeAll is disallowed here, because it would probably be a mistake: the "capital"
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// field would be overwritten with the empty string.
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_, err = client.Doc("States/Alabama").Set(ctx, State{Population: 5.2}, firestore.Merge([]string{"pop"}))
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if err != nil {
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// TODO: Handle error.
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}
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}
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func ExampleDocumentRef_Update() {
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ctx := context.Background()
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client, err := firestore.NewClient(ctx, "project-id")
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if err != nil {
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// TODO: Handle error.
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}
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defer client.Close()
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tenn := client.Doc("States/Tennessee")
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wr, err := tenn.Update(ctx, []firestore.Update{
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{Path: "pop", Value: 6.6},
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{FieldPath: []string{".", "*", "/"}, Value: "odd"},
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})
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if err != nil {
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// TODO: Handle error.
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}
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fmt.Println(wr.UpdateTime)
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}
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func ExampleDocumentRef_Delete() {
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ctx := context.Background()
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client, err := firestore.NewClient(ctx, "project-id")
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if err != nil {
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// TODO: Handle error.
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}
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defer client.Close()
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// Oops, Ontario is a Canadian province...
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if _, err = client.Doc("States/Ontario").Delete(ctx); err != nil {
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// TODO: Handle error.
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}
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}
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func ExampleDocumentRef_Get() {
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ctx := context.Background()
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client, err := firestore.NewClient(ctx, "project-id")
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if err != nil {
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// TODO: Handle error.
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}
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defer client.Close()
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docsnap, err := client.Doc("States/Ohio").Get(ctx)
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if err != nil {
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// TODO: Handle error.
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}
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_ = docsnap // TODO: Use DocumentSnapshot.
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}
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func ExampleDocumentRef_Snapshots() {
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ctx := context.Background()
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client, err := firestore.NewClient(ctx, "project-id")
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if err != nil {
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// TODO: Handle error.
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}
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defer client.Close()
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iter := client.Doc("States/Idaho").Snapshots(ctx)
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defer iter.Stop()
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for {
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docsnap, err := iter.Next()
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if err != nil {
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// TODO: Handle error.
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}
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_ = docsnap // TODO: Use DocumentSnapshot.
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}
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}
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func ExampleDocumentSnapshot_Data() {
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ctx := context.Background()
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client, err := firestore.NewClient(ctx, "project-id")
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if err != nil {
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// TODO: Handle error.
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}
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defer client.Close()
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docsnap, err := client.Doc("States/Ohio").Get(ctx)
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if err != nil {
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// TODO: Handle error.
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}
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ohioMap := docsnap.Data()
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fmt.Println(ohioMap["capital"])
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}
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func ExampleDocumentSnapshot_DataAt() {
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ctx := context.Background()
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client, err := firestore.NewClient(ctx, "project-id")
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if err != nil {
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// TODO: Handle error.
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}
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defer client.Close()
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docsnap, err := client.Doc("States/Ohio").Get(ctx)
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if err != nil {
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// TODO: Handle error.
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}
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cap, err := docsnap.DataAt("capital")
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if err != nil {
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// TODO: Handle error.
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}
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fmt.Println(cap)
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}
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func ExampleDocumentSnapshot_DataAtPath() {
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ctx := context.Background()
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client, err := firestore.NewClient(ctx, "project-id")
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if err != nil {
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// TODO: Handle error.
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}
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defer client.Close()
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docsnap, err := client.Doc("States/Ohio").Get(ctx)
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if err != nil {
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// TODO: Handle error.
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}
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pop, err := docsnap.DataAtPath([]string{"capital", "population"})
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if err != nil {
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// TODO: Handle error.
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}
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fmt.Println(pop)
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}
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func ExampleDocumentSnapshot_DataTo() {
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ctx := context.Background()
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client, err := firestore.NewClient(ctx, "project-id")
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if err != nil {
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// TODO: Handle error.
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}
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defer client.Close()
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docsnap, err := client.Doc("States/Ohio").Get(ctx)
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if err != nil {
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// TODO: Handle error.
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}
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type State struct {
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Capital string `firestore:"capital"`
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Population float64 `firestore:"pop"` // in millions
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}
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var s State
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if err := docsnap.DataTo(&s); err != nil {
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// TODO: Handle error.
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}
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fmt.Println(s)
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}
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func ExampleQuery_Documents() {
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ctx := context.Background()
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client, err := firestore.NewClient(ctx, "project-id")
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if err != nil {
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// TODO: Handle error.
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}
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defer client.Close()
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q := client.Collection("States").Select("pop").
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Where("pop", ">", 10).
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OrderBy("pop", firestore.Desc).
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Limit(10)
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iter1 := q.Documents(ctx)
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_ = iter1 // TODO: Use iter1.
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// You can call Documents directly on a CollectionRef as well.
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iter2 := client.Collection("States").Documents(ctx)
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_ = iter2 // TODO: Use iter2.
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}
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// This example is just like the one above, but illustrates
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// how to use the XXXPath methods of Query for field paths
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// that can't be expressed as a dot-separated string.
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func ExampleQuery_Documents_path_methods() {
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ctx := context.Background()
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client, err := firestore.NewClient(ctx, "project-id")
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if err != nil {
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// TODO: Handle error.
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}
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defer client.Close()
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q := client.Collection("Unusual").SelectPaths([]string{"*"}, []string{"[~]"}).
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WherePath([]string{"/"}, ">", 10).
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OrderByPath([]string{"/"}, firestore.Desc).
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Limit(10)
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iter1 := q.Documents(ctx)
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_ = iter1 // TODO: Use iter1.
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// You can call Documents directly on a CollectionRef as well.
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iter2 := client.Collection("States").Documents(ctx)
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_ = iter2 // TODO: Use iter2.
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}
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func ExampleDocumentIterator_Next() {
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ctx := context.Background()
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client, err := firestore.NewClient(ctx, "project-id")
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if err != nil {
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// TODO: Handle error.
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}
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defer client.Close()
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q := client.Collection("States").
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Where("pop", ">", 10).
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OrderBy("pop", firestore.Desc)
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iter := q.Documents(ctx)
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defer iter.Stop()
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for {
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doc, err := iter.Next()
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if err == iterator.Done {
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break
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}
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if err != nil {
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// TODO: Handle error.
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}
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fmt.Println(doc.Data())
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}
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}
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func ExampleDocumentIterator_GetAll() {
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ctx := context.Background()
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client, err := firestore.NewClient(ctx, "project-id")
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if err != nil {
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// TODO: Handle error.
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}
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defer client.Close()
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q := client.Collection("States").
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Where("pop", ">", 10).
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OrderBy("pop", firestore.Desc).
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Limit(10) // a good idea with GetAll, to avoid filling memory
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docs, err := q.Documents(ctx).GetAll()
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if err != nil {
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// TODO: Handle error.
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}
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for _, doc := range docs {
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fmt.Println(doc.Data())
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}
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}
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func ExampleClient_RunTransaction() {
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ctx := context.Background()
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client, err := firestore.NewClient(ctx, "project-id")
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if err != nil {
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// TODO: Handle error.
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}
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defer client.Close()
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nm := client.Doc("States/NewMexico")
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err = client.RunTransaction(ctx, func(ctx context.Context, tx *firestore.Transaction) error {
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doc, err := tx.Get(nm) // tx.Get, NOT nm.Get!
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if err != nil {
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return err
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}
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pop, err := doc.DataAt("pop")
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if err != nil {
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return err
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}
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return tx.Update(nm, []firestore.Update{{Path: "pop", Value: pop.(float64) + 0.2}})
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})
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if err != nil {
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// TODO: Handle error.
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}
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}
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