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Ruby on Rails 5 Basics

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Launching Rails console

1:04 with Jay McGavren

We've seen how to use the Web interface to create new model objects. Now, I want to show you how to do the same from the terminal, using the "Rails console".

To launch the Rails console, type in your terminal:

bin/rails console

You'll leave your system prompt, and be taken to a prompt provided by Ruby. Here you can type Ruby expressions. They'll be evaluated, and you'll be shown the result.

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    [MUSIC] 0:00
    We've seen how to use the web interface to create new model objects. 0:04
    Now I wanna show you how to do the same from the terminal using the Rails console. 0:08
    The Rails console is useful when you need to do an operation on many model objects 0:12
    at once, or to look at model attributes that you haven't yet added to your views. 0:16
    We've seen the Rails server and generate sub commands already. 0:21
    Console is another sub command. 0:25
    So let's make sure the Rails server is stopped and 0:27
    we're back at our system prompt. 0:29
    Then we type bin/rails console in our terminal. 0:31
    You'll leave your system prompt and be taken to a prompt provided by Ruby. 0:37
    Here you can type Ruby expressions. 0:40
    They'll be evaluated and you'll be shown the result. 0:42
    If you've used Ruby's IRB command before, it works just the same way. 0:45
    The difference is you have your full Rails environment loaded, 0:49
    including your model classes. 0:52
    Your model class is connected to your database so 0:54
    you can create, read, update, or delete model data. 0:56
    Let's try out all the CRUD operations using our post model class. 1:00

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