rails-activerecord Examples and Free Source Code

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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Upsert_all with uniqueness index constraint...

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How to set timezone for ActiveRecord queries to fetch the accurate figures?...

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How to preload associations of STI models in Rails 7?...

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When is a pessimistic lock released in ActiveRecord?...

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Validate uniqueness of multiple columns...

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How do I eager load multiple associations in same query with ActiveRecord?...

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Rails :include vs. :joins...

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Query on a time range ignoring the date of timestamps...

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Do I need to use Class.scope_name when using scope in the same model, or can I just use scope_name?...

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Rails: How can I set default values in ActiveRecord?...

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

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Using Common Table Expression (CTE) with Rails ActiveRecord...

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Rails many-to-many association query by AND of associated records...

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How to check if a Rails model is defined?...

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index: true vs foreign_key: true (Rails)...

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Subbing a class name for a table name in ActiveRecord query...

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Enum, default value reseted to nil on save...

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Creating a PostgreSQL sequence to a field (which is not the ID of the record)...

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Is there a way to create a has_many association that just filters items from another has_many associ...

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Compared with non class/module error...

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eager loading not working with order() clause in rails...

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Rails query working in console but not in the controller...

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Next Instance Method...

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How to remove index in rails...

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In Rails, can I order a query by a delegate method?...

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How to destroy a bi-directional has_one association from either end?...

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