Saving Data
Lesson 1 of 1
  1. 1
    Request/Response Cycle
    So far we’ve built a Rails app containing a static page. To do this, we used a controller, a route, and a view. The request/response cycle summarizes how these three parts work together. However…
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  2. 2
    Model
    Great! You created a new Rails app named MessengerApp. Looking at this diagram of the request/response cycle, we need four par…
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  3. 3
    Controller
    What did we just do? 1. The rails generate model command created a new model named Message. In doing so, Rails created two files: 1. a model file in app/models/message.rb. The model represent…
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  4. 4
    View
    Nice work. We added a controller and a route to the Rails app. Why does the Messages controller use an action named index? Check out the diagram in the browser. Rails provides seven standard contr…
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  5. 5
    Create messages I
    Nice work! The app now displays a list of all messages in the database. How does this work? The file index.html.erb is a web template. Web templates are HTML files that contain variables an…
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  6. 6
    Create messages II
    Nicely done! The app now takes in messages through a form and saves them into the database. How does this work? Let’s use the request/response cycle as a guide to trace how a user’s request flows …
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  7. 7
    Generalizations
    Congratulations! You built a messaging app that uses a database to store messages. What can we generalize so far? * A model represents a table in the database. * A migration is a way to update…
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What you'll create

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How you'll master it

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