> For the complete documentation index, see [llms.txt](https://certil-remy.gitbook.io/learn/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://certil-remy.gitbook.io/learn/javascript/oop/untitled-14.md). # Daily Lunch Lab ## Objectives * Build a domain model with class relations using JavaScript iterator methods * Use JavaScript to answer questions about data stored in our application * In this lab, we're using a global store variable to manage application state; it's our frontend 'database'. ## Instructions In this lab, we will be creating a meal delivery service. ## The Domain * A meal has many customers * A delivery belongs to a meal, belongs to a customer, and belongs to a neighborhood * A customer has many deliveries * A customer has many meals through deliveries * A customer belongs to a neighborhood * A neighborhood has many deliveries * A neighborhood has many customers through deliveries * A neighborhood has many meals through deliveries Please note: the tests do not check these methods in order. Some of these methods rely on the relationships between classes to be working already. Use the tests as a guide and refer to this reading if you need more information about what a method is supposed to be doing. You will be modeling the following: ### Neighborhood class: * `new Neighborhood()` - initialized with `name`. It returns an object that has attributes of `id` and `name` * `deliveries()` - returns a list of all deliveries placed in a neighborhood * `customers()` - returns all of the customers that live in a particular neighborhood * `meals()` - returns a **unique** list of meals that have been ordered in a particular neighborhood (you might want to do this one last) ### Customer class: * `new Customer()` — should expect to be initialized with a name and a neighborhoodId. It returns an object that has attributes of `id`, `neighborhoodId`, and `name`. * `deliveries()` — returns all of the deliveries that customer has received * `meals()` - returns all meals that a customer has ordered * `totalSpent()` - returns the total amount that the customer has spent on food. ### Meal class: * `new Meal()` — initialized with `title` and `price`. It returns an object that has attributes of `title`, `price`, and `id`. Meal Ids should automatically increment. * `deliveries()` - returns all of the deliveries associated with a particular meal. * `customers()` - returns all of the customers who have had the meal delivered. Be careful not to return the same customer twice if they have ordered this meal multiple times. * `byPrice()` - A [**class method**](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Classes/static) that orders all meal instances by their price in descending order. Use the `static` keyword to write a class method. ### Delivery class: * `new Delivery()` — initialized with `mealId`, `neighborhoodId`, and `customerId`. It returns an object that has attributes of `mealId`, `neighborhoodId`, `customerId`, and `id` * `meal()` - returns the meal associated with a particular delivery * `customer()` - returns the customer associated with a particular delivery * `neighborhood()` - returns the neighborhood associated with a particular delivery [![paul rudd delivers food](https://camo.githubusercontent.com/ece5d61d7bd3a5ab498b5a1d0ff2f2f82fb9fa18/68747470733a2f2f6d656469612e67697068792e636f6d2f6d656469612f336f7a3878756f7858665862314f4e7573382f67697068792e676966)](https://camo.githubusercontent.com/ece5d61d7bd3a5ab498b5a1d0ff2f2f82fb9fa18/68747470733a2f2f6d656469612e67697068792e636f6d2f6d656469612f336f7a3878756f7858665862314f4e7573382f67697068792e676966) Clone: