What does a Ruby on Rails developer need to develop an online store?

To develop an online store in Ruby on Rails, a developer needs to have the following skills and knowledge:

Experience with Ruby on Rails – this is the fundamental requirement for developing an online store on this framework. Knowledge of HTML, CSS, JavaScript, and jQuery – these languages are used to create the user interface, animations, and form validation. Basic knowledge of SQL and the ability to work with databases such as MySQL, PostgreSQL, and SQLite – for storing information about products, orders, users, etc. Experience with payment system integration – this is important as many online stores require integration with payment systems such as PayPal, Stripe, or Braintree. Understanding of SEO basics – optimizing the website for search engines is an important aspect to consider when developing an online store. Proficiency in working with Git and GitHub – this allows for efficient code versioning and sharing with other team members. Experience with both frontend and backend development – to create a fully functional online store in Ruby on Rails, a developer needs to be familiar with both frontend and backend development. Additionally, the developer may need knowledge and experience with other tools and technologies such as Bootstrap, Sass, Haml, Coffeescript, Webpack, Docker, etc., depending on the specific project requirements.

Example code for a category:

app/models/category.rb

class Category < ApplicationRecord validates :name, presence: true

has_many :products, dependent: :destroy end

This model contains only one field – the category name (name), which must be filled in to create a new category.

There is also a relationship defined between the Category and Product models, indicating that each category has many products associated with it. The relationship is defined using the has_many method, which states that a category can have multiple products. The option dependent: :destroy specifies that if a category is deleted, all its products will also be deleted from the database.

Example code for a product:

app/models/product.rb

class Product < ApplicationRecord validates :name, presence: true validates :price, presence: true, numericality: { greater_than: 0 }

belongs_to :category end”

As in the previous example, the model contains some fields and associations. In this case, the model includes fields for the product name and price, as well as an association with the Category model, which is used to group products into different categories.

There are also some validations defined to ensure the correctness of the field entries. In this case, it checks that the product name and price are present in the database, and the price is a number greater than 0.

app/controllers/products_controller.rb

if @product.save
redirect_to @product, notice: ‘Product was successfully created.’
else
render :new
end

end

def edit end

def update if @product.update(product_params) redirect_to @product, notice: ‘Product was successfully updated.’ else render :edit end end

def destroy @product.destroy redirect_to products_url, notice: ‘Product was successfully destroyed.’ end

private

def set_product @product = Product.find(params[:id]) end

def product_params params.require(:product).permit(:name, :price, :category_id) end end

The product controller defines the actions that can be performed with products in the online store. This example includes actions for displaying the list of products, creating a new product, editing an existing product, updating a product, and deleting a product.

Each action in the controller defines corresponding view templates that are used to display data to the user.

Finally, the controller also defines private methods set_product and product_params, which are used to retrieve and process data from the form submitted by the user. The set_product method retrieves the product based on its identifier, and the product_params method specifies the list of permissible parameters for creating and updating a product.