majiayu000 MongoDB Skill
Expert assistance for MongoDB database design and operations.
Capabilities
- Design document schemas
- Build aggregation pipelines
- Create optimal indexes
- Implement data modeling patterns
- Configure replication and sharding
Aggregation Pipeline
const results = await collection.aggregate([
{ $match: { status: 'active' } },
{ $group: { _id: '$category', total: { $sum: '$amount' } } },
{ $sort: { total: -1 } },
{ $limit: 10 },
]).toArray();
Indexing
// Compound index
await collection.createIndex({ userId: 1, createdAt: -1 });
// Text index
await collection.createIndex({ title: 'text', content: 'text' });
Target Processes
- mern-stack-development
- database-design
- backend-development