In this article, we look at ways to implement authorization, anticipating that you’ve already added user management and authentication. It’s important to distinguish authentication, which identifies a user, from authorization, which controls what a user is allowed to do. The RailsApps project offers an OmniAuth Tutorial and a Devise Tutorial to get you started. Both OmniAuth and Devise are robust and full-featured, so most developers use the gems, rather than implementing authentication features themselves. If you’d like visitors to register and sign in with an email address and password, you can use the Devise gem. If you would like your users to sign in with an account they’ve already established on a popular site such as Twitter or Facebook, you can use the OmniAuth gem. User management and authentication are not core features of Rails but it is easy to add authentication and user management to a Rails application, either by writing the code or adding a gem. Typically, we request an email address and a password to authenticate the user, so we can be sure whoever is signing in is the same person who created the account. Allowing users to sign in and identify themselves is called authentication. The features that allow users to create accounts (and edit or delete their profiles) are called user management features. In 1997, cookies were introduced to the web to keep track of user sessions, and soon applications were developed that allowed users to create accounts, and sign in to their accounts to initiate sessions. Browsers requested web pages without identifying the user. Originally, everyone was anonymous on the web. If this article is helpful, please join the RailsApps project. Rails changes frequently each application is known to work and serves as your personal “reference implementation.” Support for the project comes from subscribers. Hundreds of developers use the apps, report problems as they arise, and propose solutions. The RailsApps project provides example applications that developers use as starter apps. This is an article from the RailsApps project. You can create the example applications in a few minutes using Rails Composer. The RailsApps project provides example applications and tutorials demonstrating authorization: This article offers an overview of role-based authorization in Rails. An overview of Rails authorization, including role-based authorization, with a comparison of the CanCan and Pundit gems. How to control access in a Rails application.
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