mongomapper/mongomapper

Health v2 · maintenance only

Flags: no_releases

Adoption not part of the score

1600 stars · 380 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

MongoMapper is a Ruby object-document mapper (ODM) for MongoDB, providing Document and EmbeddedDocument models with keys, associations, validations, scopes, and querying. It integrates with Rails via Active Model and supports MRI and JRuby.

Use cases

• persist Ruby objects in MongoDB
• define models with typed keys and embedded documents
• query MongoDB with a Ruby DSL and dynamic finders
• use MongoDB models in Rails or Sinatra apps
• add validations, callbacks, and timestamps to Mongo documents
• model one-to-many associations with embedded documents

When to choose

• you're building a Ruby or Rails app backed by MongoDB
• you want a simple, extendable ODM with Active Model integration
• you need embedded documents and single collection inheritance
• you prefer explicit key definitions over schemaless models

When to avoid

• you're using a relational database instead of MongoDB
• you prefer Mongoid, the more widely adopted Ruby MongoDB ODM
• you need an ORM with SQL migrations and joins
• your team wants a mapper with a very large community and ecosystem

Facets

library · maturity active

orm database-driver serialization databases web-development backend ruby jvm mongodb ruby-gem object-document-mapper rails active-model

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markdown · JSON · MCP: product_card(name="mongomapper/mongomapper")