Deep Dive Into Rails ActionController Strong Parameters | Saeloun Blog

The data sent with incoming request is known as parameters. The parameters in Rails can be found in the params hash and include: Path Parameters: Embedded in the URL, e.g., /posts/:id. Query String Parameters: Added to the URL, e.g., /posts?title=rails. Form Data: Submitted via forms using POST requests. JSON Data: In APIs where the request body contains JSON. Unlike a plain Ruby hash, the params hash is an ActionController::Parameters object which treats symbols (e.g., :key) and strings (e.g., "key") as equivalent keys.