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Validate uniqueness of multiple columns
...or, but in general I recommend using a database constraint.
More reading: https://robots.thoughtbot.com/validation-database-constraint-or-both
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How to use a variable for the key part of a map
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Behaviour for significant change location API when terminated/suspended?
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ActionController::InvalidAuthenticityToken
...- Rails 4.2 deprecated skip_before_filter in favour of skip_before_action https://guides.rubyonrails.org/4_2_release_notes.html "The *_filter family of methods have been removed from the documentation. Their usage is discouraged in favor of the *_action family of methods"
For Rails 6 (as "collimar...
JavaScript Date Object Comparison
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Align button at the bottom of div using CSS
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Going to a specific line number using Less in Unix
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SCOPE_IDENTITY() for GUIDs?
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When would you use .git/info/exclude instead of .gitignore to exclude files?
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Find the extension of a filename in Ruby
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