rails.tar.gz

Routes changes

validating_the_user_model

unit_tests

show_user

migration_file

create_tokens

feed_the_database

presentation_of_JSON_API

validating_the_order_model

list_orders

decrementing_product_quantity

extending_the_placement_model

feed_the_database-2

feed_the_database-3

Setting Up the Authentication Token

validating_the_product_model

unit_tests_for_order_model

the_placement_model

decrementing_product_quantity-2

activation_of_CORS

This course is a comprehensive tutorial that will teach you the best way to build your next API with Rails. You’ll learn to create a Rails API from scratch and to optimize and secure a Rails API. By the end of this course, you’ll have a full-fledged Rails API ready to be used.

Building your own API with Rails

Add `dependent: :destroy` on products association.
```ruby
# ...
class User < ApplicationRecord
# ...
has_many :products, dependent: :destroy
end
```

Add `dependent: :nullify` on products association.
```ruby
# ...
class User < ApplicationRecord
# ...
has_many :products, dependent: :nullify
end
```

We only specify products association. Active Record handles it
implicitly.
```ruby
# ...
class User < ApplicationRecord
# ...
has_many :products
end
```

How do we remove all associated user’s products when a user is removed?

How do we remove all associated user’s products when a user is removed?

By using `product.errors`:
```ruby
def create
  # ... we can't save `product` bellow
  render json: { errors: product.errors }
end
```

By using product.errors and HTTP status `unprocessable_entity`:
```ruby
def create
  # ... we can't save `product` bellow
  render json: { errors: product.errors }, status: :unprocessable_entity
end
```

By using `product.errors` and HTTP status `500`:
```ruby
def create
  # ... we can't save `product` bellow
  render json: { errors: product.errors }, status: 500
end
```

How should we return an error during product creation into the
controller?

How should we return an error during product creation into the
controller?

We compare `@product.user` and `current_user`.
```ruby
def check_owner
  head :forbidden unless @product.user ==current_user
end
```

We compare `@product.user_id` and `current_user.id`.

```ruby
def check_owner
  head :forbidden unless @product.user_id == current_user&.id
end
```


We only check if the `current_user` exists.
```ruby
def check_owner
  head :forbidden unless current_user
end
```

How can we check the owner of a product in `ProductsController`?

How can we check the owner of a product in <code>ProductsController</code>?

Which file populates the database with default data?

Which file populates the database with default data?

Test your knowledge about the Product model.

Getting Started

The API

User Model

Authenticating the Users

User's Products

Building JSON

Placing Orders

Improving Orders

Optimizations

Wrap up

Appendix

Quiz Yourself: Product Model