Associations I
Lesson 1 of 1
  1. 1
    Adding More Data
    We built a Rails app that stores data using a single model. What if we want to build an app with more than one kind of data, like Team and Athlete? Both Team and Athlete would have have different …
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  2. 2
    Models I
    Great! Looking at the request/response cycle, we need four parts to build the travel app: models, controllers, routes, and views. Let’s begin by creating the models.
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  3. 3
    Models II
    What did we just do? 1. We created two models named Tag and Destinations. 2. In the model files, we used the methods has_many and belongs_to define an association between Tag and Destination: …
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  4. 4
    Display all tags
    Nice work. What did we just do? 1. We added two string columns title and image to the tags table 2. We added three string columns name, image, and description to the destinations table 3. We also …
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  5. 5
    Show a tag
    Well done! The app now displays a list of tags from the database.
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  6. 6
    Show a destination
    Nice job! The app displays all destinations that belong to a tag. How does this work? - When a user visits http://localhost:8000/tags/1, the route get ‘/tags/:id’ => ‘tags#show’ sends this request…
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  7. 7
    Update a destination I
    Great! The app now displays a specific destination. Let’s continue by adding actions to update a destination’s name and description. Looking at the seven standard Rails actions, we need to use the…
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  8. 8
    Update a destination II
    Nicely done! You can now update a destination’s name and description. How does it work? When you visit http://localhost:8000/destinations/1/edit to edit a destination, it triggers the first turn o…
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  9. 9
    Generalizations
    Congratulations! You built an travel app that uses a database to store two kinds of data. What can we generalize so far? - We connected a Tag to its Destinations using associations. In this case…
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