Скачать или смотреть How to Delete a Table Row with Ruby on Rails

Learn how to effectively delete a table row and its corresponding array element in Ruby on Rails, ensuring your application remains tidy and user-friendly.
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This video is based on the question https://stackoverflow.com/q/67527332/ asked by the user 'Harushii' ( https://stackoverflow.com/u/12517749/ ) and on the answer https://stackoverflow.com/a/67530823/ provided by the user 'Jan Matuszewski' ( https://stackoverflow.com/u/9984998/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Introduction

In the world of web application development, managing data effectively is crucial. If you are using Ruby on Rails and need to delete a table row along with the corresponding element from an array, you've come to the right place. This task is common yet can be quite challenging, especially for beginners. In this post, we'll walk you through the steps to delete a table row and how to manage array elements seamlessly in your controller.

The Problem

You might find yourself in a situation where you have a table displaying records fetched from an array, with corresponding "Delete" and "Edit" buttons for each row. The goal is to remove that specific row from both the table and the underlying array when the "Delete" button is clicked. Ideally, upon deletion, the page should refresh to reflect these changes.

Solution Overview

To achieve this functionality, we will:

Update the routes in the routes.rb file.

Define the controller actions for the destroy method.

Modify the view to incorporate functioning buttons for deletion.

Let's break down these steps in detail.

Step 1: Updating Routes

First, we need to ensure that we have the correct routes set up in the routes.rb file. This configuration allows us to handle delete requests properly. Here’s how to add the necessary routes:

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

This line will enable the destroy action which we will define next.

Step 2: Defining the Controller Actions

Now, let’s create the logic for our controller. We will use the destroy method to remove the hospital entry from the database and refresh the page accordingly. Here's how you can structure the HospitalsController:

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

Step 3: Modifying the View

Next, we’ll update our view file to include a functional delete button. You will replace the existing delete button code in your HTML/ERB file with the following:

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

Final Thoughts

With these steps, you now have functioning delete buttons in your Rails application that will:

Remove the specific table row.

Delete the corresponding hospital record from the array.

Refresh the page so that the changes are visible.

Moving Forward

If you also need to add edit functionality in the future, consider creating additional methods in the controller and corresponding views for handling edits seamlessly.

Make sure to explore the Ruby on Rails documentation and to keep practicing your coding skills. If you face further challenges, the Rails community is always there to help and share solutions. Happy coding!