activerecord Examples and Free Source Code

ActiveRecord Callbacks List...

ruby-on-rails activerecord callback

Ruby active_record-acts_as gem issue with joining for child and parent class...

ruby-on-rails ruby activerecord

Rails delete record from joins table: delete_all fails when using additional joins...

ruby-on-rails activerecord

Altering the primary key in Rails to be a string...

ruby-on-rails ruby activerecord

Query on JSON object keys in Rails/ActiveRecord/Postgresql...

ruby-on-rails postgresql activerecord psql

Codeigniter db query clause where not working...

php codeigniter activerecord sql-like logical-grouping

What is the Rails way to work with polymorphic associations?...

ruby-on-rails ruby ruby-on-rails-4 activerecord polymorphic-associations

Validate uniqueness of multiple columns...

ruby-on-rails validation activerecord rails-activerecord

Why does Rails use the prefix 2:: in the session_id stored in the database?...

ruby-on-rails activerecord

Use Rails' select() to add (not overwrite) selected attributes?...

ruby-on-rails activerecord rails-activerecord

Yii2 Active Record Order By Primary Key ID not working...

activerecord yii2 sql-order-by

No connection pool for 'ActiveRecord::Base' found for the ' ' role...

activerecord ruby-on-rails-7 ruby-upgrade

Rails 5: STI With Has Many Through Association...

ruby-on-rails activerecord associations has-many-through sti

Rails—get a random record from db?...

ruby-on-rails activerecord ruby-on-rails-5

Get plural version of Rails model name...

ruby-on-rails activerecord

Nested SQL transactions in Active Record - risks?...

sql ruby-on-rails activerecord transactions

adding a scope to an _ids Active Record attribute...

ruby-on-rails-3 activerecord

Binding Parameters with Rails ActiveRecord::Base.connection.exec_query in mysql...

ruby-on-rails ruby activerecord

Rails, how to lazily replace an ActiveRecord collection...

ruby-on-rails activerecord

Rails create or update magic?...

ruby-on-rails activerecord

How can I skip before_validations in Rails?...

ruby-on-rails activerecord

How to add raw_filter method to ruby on rails 7?...

ruby-on-rails ruby activerecord rubygems activesupport

How do I query for empty jsonb arrays in Postgres, Activerecord, Rails 5...

postgresql activerecord ruby-on-rails-5 jsonb

active-record postgres check if jsonb array contains x or y...

ruby-on-rails postgresql activerecord jsonb

ActiveRecord exists? with associations...

ruby-on-rails ruby activerecord

Polymorphic Association not working with ActiveHash...

ruby-on-rails ruby activerecord

How to select where ID in Array Rails ActiveRecord without exception...

ruby-on-rails activerecord find

Convert SQL containing a subquery and multiple OR WHERE conditions to CodeIgniter's active recor...

php sql codeigniter activerecord query-builder

Reserved names with ActiveRecord models...

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How do I order by lower-cased field on an aliased association without manually specifying a join?...

ruby-on-rails activerecord ruby-on-rails-7 arel