Ransack is the successor to the MetaSearch gem. It improves and expands upon MetaSearch's functionality, but does not have a 100%-compatible API.

Filterrific is a Rails Engine plugin that makes it easy to filter, search, and sort your ActiveRecord lists.

Search engine like fulltext query support for ActiveRecord

Scoped search makes it easy to search your ActiveRecord-based models. It will create a named scope :search_for that can be called with a query string. It will build an SQL query using the provided query string and a definition that specifies on what fields to search. Because the func...

Searchlight is a low-magic way to build database searches using an ORM. It's compatible with ActiveRecord, Sequel, Mongoid, and any other ORM that can build queries by chaining method calls.

FortyFacets lets you easily build explorative search interfaces based on fields of your active_record models.

Parameters-based transformation DSL

The simplest way to search the data

Declare filters in Rails controllers to increase readability and reduce boilerplate code.