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Fixing this Error: NameError (uninitialized constant ActiveRecord::ConnectionAdapters::Mysql2Adapter::Column)

Are you allowed to use a find_each query with an includes statement?

Rails has_many custom ActiveRecord Association

What's the Rails 3 replacement for ActiveRecord::Errors?

How to do has_many with a model that is in a namespace

Handling Complex WHERE clauses with a PHP Query Builder

Rails Arel selecting distinct columns

Empty array as default for active_record serialized attribute

rails, how to alias a relation in model?

Rails Search ActiveRecord with Logical Operators

find_by_sql to something that returns an activeRecords relation

Elegant PostgreSQL Group by for Ruby on Rails / ActiveRecord

Use Arel for a nested set & join query and convert to ActiveRecord::Relation

limit the number of objects returned in a has_many

When should I validate the presence of an ActiveRecord association object vs its id?

Rails has_many through aliasing with source and source_type for multiple types

How can I build a front end for querying a Redshift database (hopefully with Rails)

how to call a active record named scope with a string

How can I rollback a rails save/transaction?

Rails ActiveRecord - update_all: how to update multiple fields at once with mixed type of arguments