Certainly! Let’s break this down.
Ruby on Rails Architecture
First, understanding the architecture of Ruby on Rails helps. Rails is a Model-View-Controller (MVC) framework. In this architecture:
Model: Represents the data and the business logic.
View: Represents the user interface and display.
Controller: Acts as an intermediary between the Model and the View, receiving requests, processing data, and returning responses.
Where params Comes From
In Rails, when a request is made to a controller action, the framework creates a params hash with all the parameters from the request. This includes:
Parameters from the query string
Parameters from the request body (like form data)
Route parameters (like the id in posts/:id)
The params method is available in all controllers and views. It’s defined in ActionController::Base, from which ApplicationController (and subsequently your PostsController) inherits. So, when you’re inside any controller action, you can access the params hash to get information about the request.
Investigating with Debugging
RubyMine provides a robust debugging environment. Here’s how you can investigate further while debugging:
Breakpoints: Set a breakpoint in your controller action (or any Ruby code). When the execution reaches that point, it’ll pause, and you can inspect the current state.
Inspecting self: When paused at a breakpoint, evaluate self. In a controller action, self refers to the instance of the controller. Through it, you can access instance variables, methods, and more.
Investigate Inherited Methods: While paused, you can see a list of methods available on self. This can help you understand what methods are defined by Rails and available in your controller. Look specifically for methods inherited from ActionController::Base or its ancestors.
Rails Source Code: Sometimes, to really understand, you may want to dive into the Rails source code. It’s open-source, and you can find it on GitHub. For example, if you’re curious about how params is implemented, you could look at the source code for ActionController::Base.
Rails Console (rails c): This is an IRB session with your Rails environment loaded. You can experiment and run any Ruby or Rails code here. It’s a great way to test out things without affecting your running application.
Logs: Check the Rails server logs. They provide detailed information about each request, including parameters.
Documentation & Community: The Rails guides and API documentation are comprehensive. Plus, there’s a massive community around Rails, so there are plenty of resources, forums, and discussions available to help.
In your specific case, when you’re paused at a breakpoint in RubyMine inside your #show action, try evaluating self.class.ancestors. This will show you all the classes/modules your controller inherits from. This can give you insight into where certain methods (like params) come from.
Remember, Rails does a lot of things “magically” behind the scenes using metaprogramming, conventions, and inheritance. As you dig deeper, you’ll get more familiar with its inner workings.
this is what comes back asking the AI, others might have better and detailed answers, however if you have access to chatgpt 3.5 or 4 its really nice to build something with them together. I am just in the process of doing that and stretching it out by questioning and wanting changes to what chatgpt suggest, trying it out etc because I learn from the mistakes the AI sometimes makes. 