MongoDB Recipes

MongoDB shell commands for CRUD operations, aggregation pipelines, indexing, and database administration.

8 recipes

Build Aggregation Pipelines from CLI

Construct and test MongoDB aggregation pipelines in mongosh for data transformation, grouping, and analysis directly from the command line.

5 steps|15 min|aggregation, pipeline, analytics

$ mongosh --eval 'db.orders.aggregate([{$match: {status: "completed"}}, {$group: {_id: "$customerId", totalSpent: {$sum: "$amount"}, orderCount: {$sum: 1}}}, {$sort: {totalSpent: -1}}, {$limit: 10}])' mydb

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MongoDB Atlas Management from CLI

Beginner

Manage MongoDB Atlas clusters, databases, and users from the command line using the Atlas CLI for automated cloud database operations.

6 steps|12 min|atlas, cloud, cli

$ atlas auth login

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mongodump and mongorestore Workflow

Beginner

Create full and partial MongoDB backups with mongodump and restore them with mongorestore for disaster recovery and data migration.

5 steps|10 min|backup, restore, mongodump

$ mongodump --db=mydb --gzip --out=/backups/mongodb/$(date +%Y%m%d-%H%M%S)

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Index Analysis and Optimization

Intermediate

Analyze query performance with explain plans, identify missing indexes, and optimize existing indexes to speed up MongoDB queries.

5 steps|15 min|indexes, performance, explain

$ mongosh --eval 'db.orders.find({customerId: "c1001", status: "pending"}).explain("executionStats")' mydb

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Replica Set Initialization and Management

Advanced

Deploy a MongoDB replica set for high availability with automatic failover, data redundancy, and read scaling across multiple nodes.

5 steps|20 min|replica-set, high-availability, failover

$ mongod --replSet rs0 --port 27017 --dbpath /data/rs0-0 --bind_ip localhost --fork --logpath /var/log/mongodb/rs0-0.log

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JSON Schema Validation Rules

Intermediate

Enforce data integrity in MongoDB by defining JSON Schema validation rules that reject documents not matching your expected structure.

5 steps|12 min|schema, validation, data-integrity

$ mongosh --eval 'db.createCollection("products", {validator: {$jsonSchema: {bsonType: "object", required: ["name", "price", "category"], properties: {name: {bsonType: "string", description: "must be a string"}, price: {bsonType: "number", minimum: 0, description: "must be a non-negative number"}, category: {enum: ["electronics", "clothing", "food", "books"], description: "must be a valid category"}, inStock: {bsonType: "bool"}}}}})' mydb

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Horizontal Scaling with Sharding

Advanced

Distribute data across multiple shards for horizontal scaling using MongoDB sharded clusters with config servers and mongos routers.

6 steps|20 min|sharding, scaling, distributed

$ mongod --configsvr --replSet configRS --port 27019 --dbpath /data/configsvr --bind_ip localhost --fork --logpath /var/log/mongodb/configsvr.log

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Authentication and User Management

Beginner

Secure your MongoDB deployment by enabling authentication, creating users with specific roles, and managing access control.

5 steps|10 min|authentication, security, users

$ mongosh --eval 'db.getSiblingDB("admin").createUser({user: "admin", pwd: "secure_admin_pass", roles: [{role: "userAdminAnyDatabase", db: "admin"}, {role: "readWriteAnyDatabase", db: "admin"}, {role: "clusterAdmin", db: "admin"}]})'

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