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examples.go
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examples.go
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// Copyright (C) MongoDB, Inc. 2017-present.
//
// 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 http://www.apache.org/licenses/LICENSE-2.0
// NOTE: Any time this file is modified, a WEBSITE ticket should be opened to sync the changes with
// the "What is MongoDB" webpage, which the example was originally added to as part of WEBSITE-5148.
package documentation_examples
import (
"context"
"testing"
"github.com/mongodb/mongo-go-driver/bson"
"github.com/mongodb/mongo-go-driver/mongo"
"github.com/stretchr/testify/require"
)
func requireCursorLength(t *testing.T, cursor mongo.Cursor, length int) {
i := 0
for cursor.Next(context.Background()) {
i++
}
require.NoError(t, cursor.Err())
require.Equal(t, i, length)
}
func stringSliceEquals(s1 []string, s2 []string) bool {
if len(s1) != len(s2) {
return false
}
for i := range s1 {
if s1[i] != s2[i] {
return false
}
}
return true
}
func containsKey(keys bson.Keys, key string, prefix []string) bool {
for _, k := range keys {
if k.Name == key && stringSliceEquals(k.Prefix, prefix) {
return true
}
}
return false
}
func InsertExamples(t *testing.T, db *mongo.Database) {
_, err := db.RunCommand(
context.Background(),
bson.NewDocument(bson.EC.Int32("dropDatabase", 1)),
)
require.NoError(t, err)
coll := db.Collection("inventory")
{
// Start Example 1
result, err := coll.InsertOne(
context.Background(),
bson.NewDocument(
bson.EC.String("item", "canvas"),
bson.EC.Int32("qty", 100),
bson.EC.ArrayFromElements("tags",
bson.VC.String("cotton"),
),
bson.EC.SubDocumentFromElements("size",
bson.EC.Int32("h", 28),
bson.EC.Double("w", 35.5),
bson.EC.String("uom", "cm"),
),
))
// End Example 1
require.NoError(t, err)
require.NotNil(t, result.InsertedID)
}
{
// Start Example 2
cursor, err := coll.Find(
context.Background(),
bson.NewDocument(bson.EC.String("item", "canvas")),
)
// End Example 2
require.NoError(t, err)
requireCursorLength(t, cursor, 1)
}
{
// Start Example 3
result, err := coll.InsertMany(
context.Background(),
[]interface{}{
bson.NewDocument(
bson.EC.String("item", "journal"),
bson.EC.Int32("qty", 25),
bson.EC.ArrayFromElements("tags",
bson.VC.String("blank"),
bson.VC.String("red"),
),
bson.EC.SubDocumentFromElements("size",
bson.EC.Int32("h", 14),
bson.EC.Int32("w", 21),
bson.EC.String("uom", "cm"),
),
),
bson.NewDocument(
bson.EC.String("item", "mat"),
bson.EC.Int32("qty", 25),
bson.EC.ArrayFromElements("tags",
bson.VC.String("gray"),
),
bson.EC.SubDocumentFromElements("size",
bson.EC.Double("h", 27.9),
bson.EC.Double("w", 35.5),
bson.EC.String("uom", "cm"),
),
),
bson.NewDocument(
bson.EC.String("item", "mousepad"),
bson.EC.Int32("qty", 25),
bson.EC.ArrayFromElements("tags",
bson.VC.String("gel"),
bson.VC.String("blue"),
),
bson.EC.SubDocumentFromElements("size",
bson.EC.Int32("h", 19),
bson.EC.Double("w", 22.85),
bson.EC.String("uom", "cm"),
),
),
})
// End Example 3
require.NoError(t, err)
require.Len(t, result.InsertedIDs, 3)
}
}
func QueryToplevelFieldsExamples(t *testing.T, db *mongo.Database) {
_, err := db.RunCommand(
context.Background(),
bson.NewDocument(bson.EC.Int32("dropDatabase", 1)),
)
require.NoError(t, err)
coll := db.Collection("inventory")
{
// Start Example 6
docs := []interface{}{
bson.NewDocument(
bson.EC.String("item", "journal"),
bson.EC.Int32("qty", 25),
bson.EC.SubDocumentFromElements("size",
bson.EC.Int32("h", 14),
bson.EC.Int32("w", 21),
bson.EC.String("uom", "cm"),
),
bson.EC.String("status", "A"),
),
bson.NewDocument(
bson.EC.String("item", "notebook"),
bson.EC.Int32("qty", 50),
bson.EC.SubDocumentFromElements("size",
bson.EC.Double("h", 8.5),
bson.EC.Int32("w", 11),
bson.EC.String("uom", "in"),
),
bson.EC.String("status", "A"),
),
bson.NewDocument(
bson.EC.String("item", "paper"),
bson.EC.Int32("qty", 100),
bson.EC.SubDocumentFromElements("size",
bson.EC.Double("h", 8.5),
bson.EC.Int32("w", 11),
bson.EC.String("uom", "in"),
),
bson.EC.String("status", "D"),
),
bson.NewDocument(
bson.EC.String("item", "planner"),
bson.EC.Int32("qty", 75),
bson.EC.SubDocumentFromElements("size",
bson.EC.Double("h", 22.85),
bson.EC.Int32("w", 30),
bson.EC.String("uom", "cm"),
),
bson.EC.String("status", "D"),
),
bson.NewDocument(
bson.EC.String("item", "postcard"),
bson.EC.Int32("qty", 45),
bson.EC.SubDocumentFromElements("size",
bson.EC.Int32("h", 10),
bson.EC.Double("w", 15.25),
bson.EC.String("uom", "cm"),
),
bson.EC.String("status", "A"),
),
}
result, err := coll.InsertMany(context.Background(), docs)
// End Example 6
require.NoError(t, err)
require.Len(t, result.InsertedIDs, 5)
}
{
// Start Example 7
cursor, err := coll.Find(
context.Background(),
bson.NewDocument(),
)
// End Example 7
require.NoError(t, err)
requireCursorLength(t, cursor, 5)
}
{
// Start Example 9
cursor, err := coll.Find(
context.Background(),
bson.NewDocument(bson.EC.String("status", "D")),
)
// End Example 9
require.NoError(t, err)
requireCursorLength(t, cursor, 2)
}
{
// Start Example 10
cursor, err := coll.Find(
context.Background(),
bson.NewDocument(
bson.EC.SubDocumentFromElements("status",
bson.EC.ArrayFromElements("$in",
bson.VC.String("A"),
bson.VC.String("D"),
),
),
))
// End Example 10
require.NoError(t, err)
requireCursorLength(t, cursor, 5)
}
{
// Start Example 11
cursor, err := coll.Find(
context.Background(),
bson.NewDocument(
bson.EC.String("status", "A"),
bson.EC.SubDocumentFromElements("qty",
bson.EC.Int32("$lt", 30),
),
))
// End Example 11
require.NoError(t, err)
requireCursorLength(t, cursor, 1)
}
{
// Start Example 12
cursor, err := coll.Find(
context.Background(),
bson.NewDocument(
bson.EC.ArrayFromElements("$or",
bson.VC.DocumentFromElements(
bson.EC.String("status", "A"),
),
bson.VC.DocumentFromElements(
bson.EC.SubDocumentFromElements("qty",
bson.EC.Int32("$lt", 30),
),
),
),
))
// End Example 12
require.NoError(t, err)
requireCursorLength(t, cursor, 3)
}
{
// Start Example 13
cursor, err := coll.Find(
context.Background(),
bson.NewDocument(
bson.EC.String("status", "A"),
bson.EC.ArrayFromElements("$or",
bson.VC.DocumentFromElements(
bson.EC.SubDocumentFromElements("qty",
bson.EC.Int32("$lt", 30),
),
),
bson.VC.DocumentFromElements(
bson.EC.Regex("item", "^p", ""),
),
),
))
// End Example 13
require.NoError(t, err)
requireCursorLength(t, cursor, 2)
}
}
func QueryEmbeddedDocumentsExamples(t *testing.T, db *mongo.Database) {
_, err := db.RunCommand(
context.Background(),
bson.NewDocument(bson.EC.Int32("dropDatabase", 1)),
)
require.NoError(t, err)
coll := db.Collection("inventory")
{
// Start Example 14
docs := []interface{}{
bson.NewDocument(
bson.EC.String("item", "journal"),
bson.EC.Int32("qty", 25),
bson.EC.SubDocumentFromElements("size",
bson.EC.Int32("h", 14),
bson.EC.Int32("w", 21),
bson.EC.String("uom", "cm"),
),
bson.EC.String("status", "A"),
),
bson.NewDocument(
bson.EC.String("item", "notebook"),
bson.EC.Int32("qty", 50),
bson.EC.SubDocumentFromElements("size",
bson.EC.Double("h", 8.5),
bson.EC.Int32("w", 11),
bson.EC.String("uom", "in"),
),
bson.EC.String("status", "A"),
),
bson.NewDocument(
bson.EC.String("item", "paper"),
bson.EC.Int32("qty", 100),
bson.EC.SubDocumentFromElements("size",
bson.EC.Double("h", 8.5),
bson.EC.Int32("w", 11),
bson.EC.String("uom", "in"),
),
bson.EC.String("status", "D"),
),
bson.NewDocument(
bson.EC.String("item", "planner"),
bson.EC.Int32("qty", 75),
bson.EC.SubDocumentFromElements("size",
bson.EC.Double("h", 22.85),
bson.EC.Int32("w", 30),
bson.EC.String("uom", "cm"),
),
bson.EC.String("status", "D"),
),
bson.NewDocument(
bson.EC.String("item", "postcard"),
bson.EC.Int32("qty", 45),
bson.EC.SubDocumentFromElements("size",
bson.EC.Int32("h", 10),
bson.EC.Double("w", 15.25),
bson.EC.String("uom", "cm"),
),
bson.EC.String("status", "A"),
),
}
result, err := coll.InsertMany(context.Background(), docs)
// End Example 14
require.NoError(t, err)
require.Len(t, result.InsertedIDs, 5)
}
{
// Start Example 15
cursor, err := coll.Find(
context.Background(),
bson.NewDocument(
bson.EC.SubDocumentFromElements("size",
bson.EC.Int32("h", 14),
bson.EC.Int32("w", 21),
bson.EC.String("uom", "cm"),
),
))
// End Example 15
require.NoError(t, err)
requireCursorLength(t, cursor, 1)
}
{
// Start Example 16
cursor, err := coll.Find(
context.Background(),
bson.NewDocument(
bson.EC.SubDocumentFromElements("size",
bson.EC.Int32("w", 21),
bson.EC.Int32("h", 14),
bson.EC.String("uom", "cm"),
),
))
// End Example 16
require.NoError(t, err)
requireCursorLength(t, cursor, 0)
}
{
// Start Example 17
cursor, err := coll.Find(
context.Background(),
bson.NewDocument(
bson.EC.String("size.uom", "in"),
))
// End Example 17
require.NoError(t, err)
requireCursorLength(t, cursor, 2)
}
{
// Start Example 18
cursor, err := coll.Find(
context.Background(),
bson.NewDocument(
bson.EC.SubDocumentFromElements("size.h",
bson.EC.Int32("$lt", 15),
),
))
// End Example 18
require.NoError(t, err)
requireCursorLength(t, cursor, 4)
}
{
// Start Example 19
cursor, err := coll.Find(
context.Background(),
bson.NewDocument(
bson.EC.SubDocumentFromElements("size.h",
bson.EC.Int32("$lt", 15),
),
bson.EC.String("size.uom", "in"),
bson.EC.String("status", "D"),
))
// End Example 19
require.NoError(t, err)
requireCursorLength(t, cursor, 1)
}
}
func QueryArraysExamples(t *testing.T, db *mongo.Database) {
_, err := db.RunCommand(
context.Background(),
bson.NewDocument(bson.EC.Int32("dropDatabase", 1)),
)
require.NoError(t, err)
coll := db.Collection("inventory")
{
// Start Example 20
docs := []interface{}{
bson.NewDocument(
bson.EC.String("item", "journal"),
bson.EC.Int32("qty", 25),
bson.EC.ArrayFromElements("tags",
bson.VC.String("blank"),
bson.VC.String("red"),
),
bson.EC.ArrayFromElements("dim_cm",
bson.VC.Int32(14),
bson.VC.Int32(21),
),
),
bson.NewDocument(
bson.EC.String("item", "notebook"),
bson.EC.Int32("qty", 50),
bson.EC.ArrayFromElements("tags",
bson.VC.String("red"),
bson.VC.String("blank"),
),
bson.EC.ArrayFromElements("dim_cm",
bson.VC.Int32(14),
bson.VC.Int32(21),
),
),
bson.NewDocument(
bson.EC.String("item", "paper"),
bson.EC.Int32("qty", 100),
bson.EC.ArrayFromElements("tags",
bson.VC.String("red"),
bson.VC.String("blank"),
bson.VC.String("plain"),
),
bson.EC.ArrayFromElements("dim_cm",
bson.VC.Int32(14),
bson.VC.Int32(21),
),
),
bson.NewDocument(
bson.EC.String("item", "planner"),
bson.EC.Int32("qty", 75),
bson.EC.ArrayFromElements("tags",
bson.VC.String("blank"),
bson.VC.String("red"),
),
bson.EC.ArrayFromElements("dim_cm",
bson.VC.Double(22.85),
bson.VC.Int32(30),
),
),
bson.NewDocument(
bson.EC.String("item", "postcard"),
bson.EC.Int32("qty", 45),
bson.EC.ArrayFromElements("tags",
bson.VC.String("blue"),
),
bson.EC.ArrayFromElements("dim_cm",
bson.VC.Int32(10),
bson.VC.Double(15.25),
),
),
}
result, err := coll.InsertMany(context.Background(), docs)
// End Example 20
require.NoError(t, err)
require.Len(t, result.InsertedIDs, 5)
}
{
// Start Example 21
cursor, err := coll.Find(
context.Background(),
bson.NewDocument(
bson.EC.ArrayFromElements("tags",
bson.VC.String("red"),
bson.VC.String("blank"),
),
))
// End Example 21
require.NoError(t, err)
requireCursorLength(t, cursor, 1)
}
{
// Start Example 22
cursor, err := coll.Find(
context.Background(),
bson.NewDocument(
bson.EC.SubDocumentFromElements("tags",
bson.EC.ArrayFromElements("$all",
bson.VC.String("red"),
bson.VC.String("blank"),
),
),
))
// End Example 22
require.NoError(t, err)
requireCursorLength(t, cursor, 4)
}
{
// Start Example 23
cursor, err := coll.Find(
context.Background(),
bson.NewDocument(
bson.EC.String("tags", "red"),
))
// End Example 23
require.NoError(t, err)
requireCursorLength(t, cursor, 4)
}
{
// Start Example 24
cursor, err := coll.Find(
context.Background(),
bson.NewDocument(
bson.EC.SubDocumentFromElements("dim_cm",
bson.EC.Int32("$gt", 25),
),
))
// End Example 24
require.NoError(t, err)
requireCursorLength(t, cursor, 1)
}
{
// Start Example 25
cursor, err := coll.Find(
context.Background(),
bson.NewDocument(
bson.EC.SubDocumentFromElements("dim_cm",
bson.EC.Int32("$gt", 15),
bson.EC.Int32("$lt", 20),
),
))
// End Example 25
require.NoError(t, err)
requireCursorLength(t, cursor, 4)
}
{
// Start Example 26
cursor, err := coll.Find(
context.Background(),
bson.NewDocument(
bson.EC.SubDocumentFromElements("dim_cm",
bson.EC.SubDocumentFromElements("$elemMatch",
bson.EC.Int32("$gt", 22),
bson.EC.Int32("$lt", 30),
),
),
))
// End Example 26
require.NoError(t, err)
requireCursorLength(t, cursor, 1)
}
{
// Start Example 27
cursor, err := coll.Find(
context.Background(),
bson.NewDocument(
bson.EC.SubDocumentFromElements("dim_cm.1",
bson.EC.Int32("$gt", 25),
),
))
// End Example 27
require.NoError(t, err)
requireCursorLength(t, cursor, 1)
}
{
// Start Example 28
cursor, err := coll.Find(
context.Background(),
bson.NewDocument(
bson.EC.SubDocumentFromElements("tags",
bson.EC.Int32("$size", 3),
),
))
// End Example 28
require.NoError(t, err)
requireCursorLength(t, cursor, 1)
}
}
func QueryArrayEmbeddedDocumentsExamples(t *testing.T, db *mongo.Database) {
_, err := db.RunCommand(
context.Background(),
bson.NewDocument(bson.EC.Int32("dropDatabase", 1)),
)
require.NoError(t, err)
coll := db.Collection("inventory")
{
// Start Example 29
docs := []interface{}{
bson.NewDocument(
bson.EC.String("item", "journal"),
bson.EC.ArrayFromElements("instock",
bson.VC.DocumentFromElements(
bson.EC.String("warehouse", "A"),
bson.EC.Int32("qty", 5),
),
bson.VC.DocumentFromElements(
bson.EC.String("warehouse", "C"),
bson.EC.Int32("qty", 15),
),
),
),
bson.NewDocument(
bson.EC.String("item", "notebook"),
bson.EC.ArrayFromElements("instock",
bson.VC.DocumentFromElements(
bson.EC.String("warehouse", "C"),
bson.EC.Int32("qty", 5),
),
),
),
bson.NewDocument(
bson.EC.String("item", "paper"),
bson.EC.ArrayFromElements("instock",
bson.VC.DocumentFromElements(
bson.EC.String("warehouse", "A"),
bson.EC.Int32("qty", 60),
),
bson.VC.DocumentFromElements(
bson.EC.String("warehouse", "B"),
bson.EC.Int32("qty", 15),
),
),
),
bson.NewDocument(
bson.EC.String("item", "planner"),
bson.EC.ArrayFromElements("instock",
bson.VC.DocumentFromElements(
bson.EC.String("warehouse", "A"),
bson.EC.Int32("qty", 40),
),
bson.VC.DocumentFromElements(
bson.EC.String("warehouse", "B"),
bson.EC.Int32("qty", 5),
),
),
),
bson.NewDocument(
bson.EC.String("item", "postcard"),
bson.EC.ArrayFromElements("instock",
bson.VC.DocumentFromElements(
bson.EC.String("warehouse", "B"),
bson.EC.Int32("qty", 15),
),
bson.VC.DocumentFromElements(
bson.EC.String("warehouse", "C"),
bson.EC.Int32("qty", 35),
),
),
),
}
result, err := coll.InsertMany(context.Background(), docs)
// End Example 29
require.NoError(t, err)
require.Len(t, result.InsertedIDs, 5)
}
{
// Start Example 30
cursor, err := coll.Find(
context.Background(),
bson.NewDocument(
bson.EC.SubDocumentFromElements("instock",
bson.EC.String("warehouse", "A"),
bson.EC.Int32("qty", 5),
),
))
// End Example 30
require.NoError(t, err)
requireCursorLength(t, cursor, 1)
}
{
// Start Example 31
cursor, err := coll.Find(
context.Background(),
bson.NewDocument(
bson.EC.SubDocumentFromElements("instock",
bson.EC.Int32("qty", 5),
bson.EC.String("warehouse", "A"),
),
))
// End Example 31
require.NoError(t, err)
requireCursorLength(t, cursor, 0)
}
{
// Start Example 32
cursor, err := coll.Find(
context.Background(),
bson.NewDocument(
bson.EC.SubDocumentFromElements("instock.0.qty",
bson.EC.Int32("$lte", 20),
),
))
// End Example 32
require.NoError(t, err)
requireCursorLength(t, cursor, 3)
}
{
// Start Example 33
cursor, err := coll.Find(
context.Background(),
bson.NewDocument(
bson.EC.SubDocumentFromElements("instock.qty",
bson.EC.Int32("$lte", 20),
),
))
// End Example 33
require.NoError(t, err)
requireCursorLength(t, cursor, 5)
}
{
// Start Example 34
cursor, err := coll.Find(
context.Background(),
bson.NewDocument(
bson.EC.SubDocumentFromElements("instock",
bson.EC.SubDocumentFromElements("$elemMatch",
bson.EC.Int32("qty", 5),
bson.EC.String("warehouse", "A"),
),
),
))
// End Example 34
require.NoError(t, err)
requireCursorLength(t, cursor, 1)
}
{
// Start Example 35
cursor, err := coll.Find(
context.Background(),
bson.NewDocument(
bson.EC.SubDocumentFromElements("instock",
bson.EC.SubDocumentFromElements("$elemMatch",
bson.EC.SubDocumentFromElements("qty",
bson.EC.Int32("$gt", 10),
bson.EC.Int32("$lte", 20),
),
),
),
))
// End Example 35
require.NoError(t, err)
requireCursorLength(t, cursor, 3)
}
{
// Start Example 36
cursor, err := coll.Find(
context.Background(),
bson.NewDocument(
bson.EC.SubDocumentFromElements("instock.qty",
bson.EC.Int32("$gt", 10),
bson.EC.Int32("$lte", 20),
),
))
// End Example 36
require.NoError(t, err)
requireCursorLength(t, cursor, 4)
}
{
// Start Example 37
cursor, err := coll.Find(
context.Background(),
bson.NewDocument(
bson.EC.Int32("instock.qty", 5),
bson.EC.String("instock.warehouse", "A"),
))
// End Example 37
require.NoError(t, err)
requireCursorLength(t, cursor, 2)
}
}
func QueryNullMissingFieldsExamples(t *testing.T, db *mongo.Database) {
_, err := db.RunCommand(
context.Background(),
bson.NewDocument(bson.EC.Int32("dropDatabase", 1)),
)
require.NoError(t, err)
coll := db.Collection("inventory")
{
// Start Example 38
docs := []interface{}{
bson.NewDocument(
bson.EC.Int32("_id", 1),
bson.EC.Null("item"),
),
bson.NewDocument(
bson.EC.Int32("_id", 2),
),
}
result, err := coll.InsertMany(context.Background(), docs)
// End Example 38
require.NoError(t, err)
require.Len(t, result.InsertedIDs, 2)
}
{
// Start Example 39