jbsmith86 / cf4-models

Example for Databases, Models, and Migrations - Codefellows class

Example for Databases, Models, and Migrations class¶ ↑

Getting started:

• Go here: github.com/vasaristudio/cf4-models

• Fork the repository.

• Clone your newly forked repository using the SSH clone URL at the bottom right of the repository view. This should look something like: git clone github.com/(your username)/cf4-models

• cd cf4-models

• bundle

• rake db:migrate

• rake db:seed

• rails c

Files you will want to take special notice of:

• all the model files in app/models

• all the migration files in db/migrate

• db/schema.rb - This is a representation of how your database is laid out.

• db/seeds.rb - This is a place for you to enter sample data to get auto-imported

Assignment:¶ ↑

Use the rails generate command to generate a new model called Pet with the columns

• person_id (integer)

• name (string)

• genus (string)

Associate the new Pet model with the Person model with a has_many association.

Edit your seeds file (see above) to make it auto-generate some fake pets owned by a person.

In the end, you should be able to do things such as:

• person = Person.new

• person.pets.count

• person.pets.create(name: ‘Fluffy’, genus: ‘snake’)

• person.pets.find_by(name: ‘Fluffy’)

When you have finished the above assignment, commit it up to Github and submit the URL for the changelog as your assignment.

Extra Credit:¶ ↑

Create a migration to add a gender column of type string to the person. Update the seeds file, migrate and run rake db:reset to reload the data from seeds.

After you are done, commit it up to Github and submit the URL for the changelog as your assignment.