Mongoose Workshop - Exercise #2 - ToDo refs

Now we want to manage ToDos for users and store them in our MongoDB database.

Therefore we have to create a ToDo model. And set it into a relationship with the user.

Task: Create Data Model

Setup a ToDo model with the following fields
- title (String), required
- status (enum: "OPEN", "IN PROCESS", "DONE", "ON HOLD", "CANCELED"), default: "OPEN"
Define the relationship between users & todos:
- Clarify & fill in the "?" in the following two lines to get the right relationship type:
  - 1 user - ? todos
  - 1 todo - ? users
Connect user schema and todo schema
- Create a relationship either by nesting or reference
  - Consider the factors "relationship tightness", "update frequency" and growing potential"

Create a seed GET route /user/:id/todos/seed
- Get the user ID from the url param (req.params.id)
- Check if a user with that ID exists in the database
- If so: Seed three todos here for this user
- Return the todos to the browser
Testing:
- Look into your list of users in Compass and grab a valid user ID
- Call your seed route with that ID (replace :id in the URL with the users real ID)