Design a schema and create the necessary migrations and models to represent citizens living in a nation:
- Citizens must have a first name and a last name.
- Citizens can optionally have a phone number.
- Citizens can belong to multiple nations.
- A nation must have a name.
- A nation can optionally have an official language.
- A nation can have many citizens.
- You should feel free to add whatever additional migrations/models etc. you need to make these associations work.
- This challenge is focused solely on migrations, models, and the database schema. The relevant files that will be checked are:
- All files in the
app/modelsdirectory. - All files in the
db/migratedirectory. - The
db/schema.rbfile.
- All files in the
- Include database constraints and model validations where appropriate.
- Draw out the ER Diagram on paper so that you can understand what data you will need to save and the relationships that you will need to create.
- Test your models in
pryby runningpry -r "./app.rb". - You do not need to add any routes to the application to make the app functional.