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Ruby on Rails ActiveRecord "has_many :through" uniqueness validation

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Deleting a record from database

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disable explain in Rails 3.2

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Rails 5—get a random record from db?

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How do I avoid multiple queries with :include in Rails?

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Rails best way to get previous and next active record object

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How to use several aggregate functions at once in Rails/ActiveRecord?

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Yii selecting only specified attributes in array

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How to change created_at format

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Migrate not working on Heroku

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Update multiple records simultaneously with ActiveRecord in Rails using one query?

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Update the value of a field in database by 1 using codeigniter

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ActiveRecord::Base doesn't belong in a hierarchy descending from ActiveRecord

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Appropriate pattern for ActiveRecord class

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How to avoid n+1 queries when using polymorphic associations?

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Rails polymorphic has_many :through

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Connection pool issue with ActiveRecord objects in rufus-scheduler

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How do I get Rails to eager load counts?

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