What is rails migration? What can it do?
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If you want to set up a one-to-one relationship between two models, you'll need to add belongs_to to one, and has_one to the other. How do you know which is which?
how you can create a controller for subject?
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What are the major components of Ruby on Rails?
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How would you create a controller for the subject?
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Mention the differences between the observers and callbacks in ruby on rails.
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