Ruby on Rails - .find_by in ruby on rails- ruby on rails tutorial - rails guides - rails tutorial - ruby rails
- We can find records by any field in our table using find_by.
Example
- if we have a User model with a first_name attribute we can do:
User.find_by(first_name: "John")
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- Mind that find_by doesn't throw any exception by default. If the result is an empty set, it returns nil instead of find.
- If the exception is needed may use find_by! that raises an ActiveRecord::RecordNotFound error like find.