activerecord Examples and Free Source Code

Find all students not enrolled in specific course...

ruby-on-rails ruby-on-rails-4 activerecord rails-activerecord

rails, activerecord, get current connection specification...

ruby-on-rails activerecord

How to build Docker with env file...

ruby-on-rails activerecord docker-compose dockerfile

Can I use an attr_writer with a Postgres Array?...

ruby-on-rails postgresql activerecord

How to count a has_many relationship using active record?...

sql ruby activerecord sinatra-activerecord

ActiveRecord nested SELECT...

sql ruby-on-rails postgresql activerecord

Is it normal for a query to spawn three query processes?...

postgresql activerecord amazon-rds

Joining Nested Associations (Multiple Level)...

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How To Order ActiveRecord Relation Based on Column Of Last Record Of Associated Object...

sql ruby-on-rails activerecord

How to test ActiveRecord callbacks with RSpec?...

ruby-on-rails activerecord rspec callback

Ruby on Rails: How to validate a model without Active Record?...

ruby-on-rails validation activerecord model

Active record where.not returns empty array...

sql ruby-on-rails ruby activerecord

Better method to find the second largest element in ruby on rails active record query...

ruby-on-rails ruby ruby-on-rails-3 ruby-on-rails-4 activerecord

How do I disallow saving objects unless its associations are set?...

ruby-on-rails ruby ruby-on-rails-4 activerecord

Rails ActiveRecord subquery on Inner Join...

ruby-on-rails activerecord subquery

How to define schema for an ActiveRecord model?...

ruby-on-rails activerecord

how can I filter has_many records by type and created_at?...

ruby-on-rails ruby activerecord

Rails Active Record: Joining single table by multiple custom associations pointing to same column...

sql ruby-on-rails activerecord

WITH query (postgres) on ActiveRecord...

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Active Record in_batches vs find_in_batches...

ruby-on-rails activerecord

puppetserver gem install adds gem but it's not available for custom functions in the puppet code...

activerecord puppet jruby

puppetserver 7.11 is crashing after installing activerecord-jdbc-adapter gem...

ruby activerecord rubygems puppet jruby

First_or_create yet ERROR: duplicate key value violates unique constraint...

ruby-on-rails-3 postgresql activerecord race-condition select-insert

Create Record With "has_many_through" Association – Ruby on Rails...

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

How to use beginless range in ActiveRecord...

ruby-on-rails activerecord ruby-on-rails-6

One-to-many association counter_cache does not reload correctly in Rails...

ruby-on-rails ruby activerecord

How to include coalesce() in ActiveRecord statement...

ruby-on-rails postgresql activerecord coalesce

Rails 3: How to get all Posts which ids are not in a given list?...

ruby-on-rails ruby-on-rails-3 activerecord active-relation

Should all association references be pluralized in the where clauses?...

ruby-on-rails ruby activerecord

Get all nested records for multiple activerecords...

ruby-on-rails activerecord rails-activerecord