Welcome to homework 4 of the Rails DeCal.
We've finally learned about models! At the end of this homework, you will have built an app with the models Cat, Todo, and User with the specifications below (along with their associated tables). As well, you will have created a view to render all the models persisted in your database. Finally, you will have responded to the questions in ANSWERS.md.
TL;DR: you will build a basic TODO app, an app pretty common in many Rails tutorials.
name: a string that contains the name of a cat
tasks: a string name of a Todo that needs to be done
finished: a boolean on whether or not a Todo has been finished
username: a string that contains the username of a User
email: a string that contains the email of a User
age: an integer that contains the age of a User
Create a home page that renders all Cats, Todos, and Users in your database.
Please briefly examine the repo before you start to see what's been done for you already. The directories app/models and db/migrations are definitely places to look at.
As well, remember to run your migrations with
rake db:migrate
when you want to make changes to your database.
Note that a walkthrough for the homework is included below. For a challenge, try completing the homework without the walkthrough.
One of the first things you should notice is that there is already a migration to create a Cats table with a name field of type string in it, but you don't have a model associated with it yet. Define the model in app/models. Then, create a method called meow (you can call it whatever really) and just have it puts "meow" to the console. Save the file and fire up your Rails console with rails c; check to see if you can create a new Cat and call its meow method as shown below.
$ rails console
> c = Cat.new
> c.meow # Should print out meow
For the User model, you'll see a migration - which was made to create a user with a name and an email - and an associated model. What you need to do is add an integer field called age to our Users table. Check out the Rails documentation to see how to do this. Run the migration and fire up your Rails console; check to see if your User model now has an age as shown below.
$ rails console
> u = User.new
> u.age # Should not error
Following, try and see if you can rename the column from name to username. You'll find how to do so within the above documentation. Do a similar check to see if it worked.
There isn't anything in the repo for todos! This is a perfect chance to see how easy it is to create a migration and model in seconds with one command. Check this out to see how. Check to see if your changes (namely creating a Todos table and Todo model) worked.
Combining everything you have learned from lectures up to this point, make a home page that displays all the Cats, Todos, and Users in your database. This will require a controller, a route, and a view. Don't worry about formatting, but feel free to make it pretty if you'd like.
Answer the questions in ANSWERS.md.
Push up your code and fill out the submission form for this homework, which can be found on Piazza.