更新多个文档

1
import { MongoClient } from "mongodb";
2
3
// Replace the uri string with your MongoDB deployment's connection string.
4
const uri = "<connection string uri>";
5
6
const client = new MongoClient(uri);
7
8
async function run() {
9
  try {
10
    const database = client.db("sample_mflix");
11
    const movies = database.collection("movies");
12
13
    // create a filter to update all movies with a 'G' rating
14
    const filter = { rated: "G" };
15
16
    // increment every document matching the filter with 2 more comments
17
    const updateDoc = {
18
      $set: {
19
        random_review: `After viewing I am ${
20
          100 * Math.random()
21
        }% more satisfied with life.`,
22
      },
23
    };
24
    const result = await movies.updateMany(filter, updateDoc);
25
    console.log(`Updated ${result.modifiedCount} documents`);
26
  } finally {
27
    await client.close();
28
  }
29
}
30
run().catch(console.dir);

1
import { MongoClient } from "mongodb";
2
3
// Replace the uri string with your MongoDB deployment's connection string.
4
const uri = "<connection string uri>";
5
6
const client = new MongoClient(uri);
7
8
enum Rating {
9
  G = "G",
10
  PG = "PG",
11
  PG_13 = "PG-13",
12
  R = "R",
13
  NR = "NOT RATED",
14
}
15
16
interface Movie {
17
  rated: Rating;
18
  random_review?: string;
19
}
20
21
async function run() {
22
  try {
23
    const database = client.db("sample_mflix");
24
    const movies = database.collection<Movie>("movies");
25
    const result = await movies.updateMany(
26
      { rated: Rating.G },
27
      {
28
        $set: {
29
          random_review: `After viewing I am ${
30
            100 * Math.random()
31
          }% more satisfied with life.`,
32
        },
33
      }
34
    );
35
    console.log(`Updated ${result.modifiedCount} documents`);
36
  } finally {
37
    await client.close();
38
  }
39
}
40
run().catch(console.dir);