What is the difference between save and save?
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When are self.up and self.down methods used?
how you can create a controller for subject?
What are the different types of association relationships that exist?
what is the purpose of the resources method in the code snippet below?
what is the difference between the Observers and Callbacks in Ruby on Rails?
Who developed ruby on rails?
What is the naming convention for variables?
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What is the Install rail package?
Explain me what is the difference between concern and application_controller.rb in ruby on rails?
What role does garbage collection play?
let me know what is ruby software and where and when it is usefull. Is it usefull to data base developer, if yes...where? thank you