Скачать или смотреть How to Replace the scaffold_controller Generator Template in Ruby on Rails

Learn how to customize the controller template generated by the scaffold in Ruby on Rails, making your application more tailored to your needs.
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Customizing the Scaffold Controller Generator in Ruby on Rails

When working with Ruby on Rails, the scaffold command is a powerful tool that helps developers quickly generate a set of files needed for Model-View-Controller (MVC) architecture. However, there may be times when you want to customize the default behavior, particularly when it comes to the templates used for generating code.

In this guide, we'll explore how to replace the template of the scaffold_controller generator. This allows you to tailor the generated controller to suit your application's unique requirements.

Understanding the Basics

With the command:

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Rails generates several files based on predefined templates located in the railties gem. This includes models, views, and controllers, among others. Sometimes, though, the default generator templates may not align with your needs. Here’s how you can override them.

Copying Default Templates

First, you can copy all available templates to your application by running:

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This command makes the templates editable and allows you to customize them.

Step-By-Step Guide to Replacing the Scaffold Controller Template

Step 1: Override the Controller Scaffolding Generator Template

To change the default behavior of the scaffold_controller, follow these steps:

Create or Edit the Controller Template:
Create a new file located at lib/templates/rails/scaffold_controller/controller.rb.tt and add your desired content. For example, you might want to add a simple overriding message:

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Generate a New Scaffold:
To test if your template replacement is successful, run the scaffold generator:

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This should display:

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Step 2: Override the General Controller Generator Template

If you want to customize the controller template used when generating new controllers (not just scaffolded ones), do the following:

Create or Edit the General Controller Template:
Create a new template at lib/templates/rails/controller/controller.rb.tt with similar content:

[[See Video to Reveal this Text or Code Snippet]]

Generate a New Controller:
Again, test your implementation by running:

[[See Video to Reveal this Text or Code Snippet]]

You should see the output:

[[See Video to Reveal this Text or Code Snippet]]

Conclusion

Customizing your Ruby on Rails scaffold controller template enhances how your application behaves and maintains consistency with your coding standards. With just a few simple commands, you can replace the default templates and make the scaffolded controllers more aligned with your project's requirements.

By understanding how to tweak these templates, you can save time during development and ensure that your controllers are functioning just the way you need them to.

Enjoy developing with Rails, and happy coding!