const { MongoClient } = require('mongodb'); const uri = "your_mongodb_uri"; const client = new MongoClient(uri, { useNewUrlParser: true, useUnifiedTopology: true }); async function run() { try { await client.connect(); console.log("Connected to MongoDB"); } finally { await client.close(); } } run().catch(console.dir);
const insertDocument = async (client, newDoc) => { const result = await client.db("database_name").collection("collection_name").insertOne(newDoc); console.log(`New document created with the following id: ${result.insertedId}`); }; // Usage insertDocument(client, { name: "John Doe", age: 30 });
const insertDocuments = async (client, newDocs) => { const result = await client.db("database_name").collection("collection_name").insertMany(newDocs); console.log(`${result.insertedCount} documents were inserted`); }; // Usage insertDocuments(client, [ { name: "John Doe", age: 30 }, { name: "Jane Doe", age: 25 } ]);
const findOneDocument = async (client, query) => { const result = await client.db("database_name").collection("collection_name").findOne(query); console.log(result); }; // Usage findOneDocument(client, { name: "John Doe" });
const findDocuments = async (client, query) => { const cursor = client.db("database_name").collection("collection_name").find(query); const results = await cursor.toArray(); console.log(results); }; // Usage findDocuments(client, { age: { $gt: 20 } });
const updateDocument = async (client, filter, updateDoc) => { const result = await client.db("database_name").collection("collection_name").updateOne(filter, { $set: updateDoc }); console.log(`${result.matchedCount} document(s) matched the filter, updated ${result.modifiedCount} document(s)`); }; // Usage updateDocument(client, { name: "John Doe" }, { age: 35 });
const updateDocuments = async (client, filter, updateDoc) => { const result = await client.db("database_name").collection("collection_name").updateMany(filter, { $set: updateDoc }); console.log(`${result.matchedCount} document(s) matched the filter, updated ${result.modifiedCount} document(s)`); }; // Usage updateDocuments(client, { age: { $lt: 30 } }, { isActive: true });
const deleteDocument = async (client, query) => { const result = await client.db("database_name").collection("collection_name").deleteOne(query); console.log(`${result.deletedCount} document(s) was/were deleted`); }; // Usage deleteDocument(client, { name: "John Doe" });
const deleteDocuments = async (client, query) => { const result = await client.db("database_name").collection("collection_name").deleteMany(query); console.log(`${result.deletedCount} document(s) was/were deleted`); }; // Usage deleteDocuments(client, { age: { $lt: 25 } });
const createIndex = async (client, index) => { const result = await client.db("database_name").collection("collection_name").createIndex(index); console.log(`Index created: ${result}`); }; // Usage createIndex(client, { name: 1 });
続きを読む
JS の矢印演算子
AWS Lambda によるサーバーレス コンピューティングの威力
以上がNodeJs を使用して MongoDB 上に単純なプロジェクトを作成することから始めるの詳細内容です。詳細については、PHP 中国語 Web サイトの他の関連記事を参照してください。