Two screencasts, two ways to eradicate Ruby nil values – RubyTapas
Two screencasts, two ways to eradicate Ruby nil values nil values are the worst. They crop up where you didn’t expect them. Their presence forces you to litter your code with conditionals: checking, checking, and checking again if a variable contains nil . Today I’m making available a classic screencast from the RubyTapas archives. In it you’ll see a way to remove nils while dramatically simplifyi
Check if record exists from controller in Rails
In my app a User can create a Business. When they trigger the index action in my BusinessesController I want to check if a Business is related to the current_user.id: If yes: display the business. If no: redirect to the new action. I was trying to use this: if Business.where(:user_id => current_user.id) == nil # no business found end But it always returns true even when the business doesn't exist.
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絶対ハマる、不思議なnil - Qiita
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Ruby Programming/Syntax/Variables and Constants - Wikibooks, open books for an open world
