> For the complete documentation index, see [llms.txt](https://certil-remy.gitbook.io/learn/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://certil-remy.gitbook.io/learn/rails/untitled-13.md).

# Index, Show, New, Create Lab

## Objectives

1. Build a RESTful `index` action
2. Build a RESTful `show` action
3. Build a RESTful `new` action
4. Build a RESTful `create` action
5. Link pages using route helpers
6. Use route helpers in a `redirect_to`
7. Build a new form with a `form_tag`

## Instructions

This will be a pretty extensive lab that will combine a number of the concepts that we have reviewed, including:

* Drawing multiple route types
* Integrating route helper methods
* Building out a form and wiring it up to the `create` action
* Linking pages together

In this lab, the application you will be starting out with will be completely blank. There are no models, views, controllers, et cetera. It has a number of RSpec and Capybara tests that will all need to pass to complete the lab. The tests can be found in the `spec` directory, in the `models`, `features`, and `controllers` sub-directories. Feel free to walk through the specs to see what behavior the application should have when you're done.

Like many production applications, we've included the `config/secrets.yml` file in the `.gitignore`. This means that you are going to have to create your own `config/secrets.yml` file for the application to run. Don't worry- we've given you a template. Just rename `config/secrets-template.yml` to `config/secrets.yml`, and you should be able to get the application to run.

The application you will be building is a Coupon app. Below is a high-level overview of the features you'll be building out:

* You will need to create a `coupons` table with `coupon_code` and `store` columns, which should both be of the `string` data type.
* Your `index` page should show all of the coupons in the database.
* The coupon codes on the `index` page should link to their corresponding coupon `show` page. You should use the `link_to` method and route helper methods instead of hard-coding an HTML `<a>` tag.
* Your `show` page should render the specific coupon passed to the route. E.g., `coupons/4` should show the coupon with an ID of 4.
* The `new.html.erb` view template should render a form that uses the `form_tag` method.
* The form should be wired up to the `create` action in the controller and, when submitted, should create a new record in the `coupons` table with the parameters passed through the form.
* The controller should use the `redirect_to` helper method to redirect the user to the `show` page template for the newly-created coupon.

## Resources

* [Reading on Create Action](https://github.com/learn-co-curriculum/rails-create-action-readme)
* [Reading on Form Integration](https://github.com/learn-co-curriculum/rails-form_tag-readme)

Clone: <https://github.com/learn-co-curriculum/rails-index-show-new-create-lab>