MongoDB

Native MongoDB support with aggregation pipelines, change streams, Atlas Search, vector search, and CSFLE encryption.

Overview

Prax provides first-class MongoDB support through the official Rust driver, bringing type-safe document operations while preserving MongoDB's flexible schema capabilities.

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Change Streams

Real-time data change notifications

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Atlas Search

Full-text and vector search

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CSFLE

Client-side field-level encryption

Connection Configuration

Configure your MongoDB connection in prax.toml. Supports standalone, replica sets, and MongoDB Atlas.

Schema Definition

Define your document structure with embedded documents and arrays. Use type for embedded subdocuments.

Aggregation Views

Create views backed by aggregation pipelines. Materialize them with $merge or $out.

Change Streams

Watch for real-time changes to your collections. Requires a replica set or sharded cluster.

Note: Change streams require a replica set. For local development, run MongoDB with --replSet rs0 and initialize the replica set.

Sharding

Configure shard keys and zone sharding for horizontal scaling.

Atlas Search

Full-text search with Lucene-powered Atlas Search. Includes fuzzy matching, highlighting, and scoring.

Vector Search

Semantic similarity search with Atlas Vector Search for AI/ML applications.

Document Operations

Type-safe atomic updates with MongoDB's rich update operators.

Read Preference & Concerns

Fine-grained control over read/write distribution in replica sets.

Read Preference	Description
`Primary`	Read from primary only (default)
`PrimaryPreferred`	Primary if available, otherwise secondary
`Secondary`	Read from secondaries only
`SecondaryPreferred`	Secondary if available, otherwise primary
`Nearest`	Lowest latency member

Client-Side Field Level Encryption

Encrypt sensitive fields before they leave your application with CSFLE.

Atlas Triggers

Define database, scheduled, and authentication triggers for MongoDB Atlas.

MongoDB Feature Support

Feature	Status	Notes
Aggregation Pipelines	✅	Full stage support
Change Streams	✅	Real-time updates
Atlas Search	✅	Full-text search
Vector Search	✅	Atlas only
Sharding	✅	Hashed & range
Zone Sharding	✅	Geographic distribution
CSFLE	✅	AWS, Azure, GCP KMS
Atlas Triggers	✅	Database/Scheduled/Auth
Schema Inference	✅	Generate schema from docs