A rule-based authorization library for Elixir applications using a declarative DSL to define and evaluate access control rules.
Authorize is an Elixir library that provides a flexible, rule-based authorization system for controlling access to resources in an application. It allows developers to define authorization rules using a clean DSL, which are evaluated sequentially to grant or deny permissions based on actions, actors, and resource states. The library emphasizes clarity and maintainability by centralizing authorization logic in a declarative manner.
Elixir developers building applications that require fine-grained access control, such as web applications with user roles and permissions, particularly those using Ecto for data handling.
Developers choose Authorize for its declarative rule DSL that simplifies writing and maintaining authorization logic, sequential rule evaluation for clear control flow, and built-in Ecto integration for seamless work with structs and changesets. It reduces boilerplate and provides descriptive error messages for better debugging.
Rule based authorization for Elixir
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The DSL allows clear, readable rule definitions with actions and descriptions, reducing boilerplate and centralizing logic, as shown in the Item module example.
Rules process in order with :ok, :error, or :next states, giving fine-grained control over authorization flow and enabling early exits or continuations.
Includes functions like get_struct/1 and is_changeset?/1 to seamlessly work with Ecto structs and changesets, simplifying database-related authorization.
Each rule can provide a reason for denial, improving debugging and user feedback, as seen in the 'only admins can read invisible items' rule.
With many rules, evaluation can be slow as each is checked in order, potentially impacting performance in high-load scenarios without built-in caching.
Tight integration with Ecto means it's less suitable for projects not using Ecto, adding an unnecessary dependency and limiting flexibility.
Default error message is generic ('no authorization rule found') when no rule matches, which might not provide enough context for complex failures or edge cases.