rails-activerecord Examples and Free Source Code

LEFT OUTER JOIN in Rails 4...

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Proper way to delete has_many :through join records?...

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How do you delete an ActiveRecord object?...

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How to write Rails scope for this SQL query...

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Getting "Unknown primary key for table" while the ID is there...

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How to get to polymorphic grandchildren in Rails ActiveRecord...

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Rails: Using greater than/less than with a where statement...

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How to automatically load model schema on rails console start?...

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Rails: Is it possible to check if a named scope is valid for a given active record?...

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Ruby on Rails Active Record return value when create fails?...

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Undefined method update_attributes in Rails...

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"This connection is in use by Fiber" error after upgrade to rails 7.2 and ruby 3.2.2...

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Combine two ActiveRecord::Relation objects...

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Validate uniqueness of multiple columns...

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What do I pass to schema_migration in ActiveRecord::MigrationContext#new...

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

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How to change default timezone for Active Record in Rails?...

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Possible to remove method in ActiveRecord?...

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How can I avoid running ActiveRecord callbacks?...

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Is it possible to add errors to an ActiveRecord object without associating them with a particular at...

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Upsert_all with uniqueness index constraint...

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What is the difference between pluck and collect in Rails?...

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List all associations of a model...

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ActiveRecord OR query...

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Rails ActiveModel get sum of calculated column...

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Changing table name at query run time in a Rails application...

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ActiveRecord validation for nil...

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Saving an associated polymorphic object duplicates it...

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ActiveRecord delete_all method updating instead of deleting...

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Ruby on Rails: getting the max value from a DB column...

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