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Summary: Learn how to implement pagination in a Ruby on Rails application to efficiently manage large datasets and improve user experience.
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Pagination is a crucial feature for web applications that deal with large datasets. It helps in presenting information in smaller, manageable chunks, improving both performance and user experience. In a Ruby on Rails application, implementing pagination is relatively straightforward thanks to the numerous gems available in the Rails ecosystem. In this guide, we'll explore how to implement pagination in a Rails application using the popular will_paginate gem.

Installing will_paginate Gem

To start using pagination in your Rails application, first, you need to install the will_paginate gem. Add it to your Gemfile:

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Then, run bundle install to install the gem.

Implementing Pagination

Assuming you have a model named Item that you want to paginate, let's dive into implementing pagination in a Rails controller.

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In the above code, we use the paginate method provided by will_paginate. It takes two arguments:

page: The current page number.

per_page: The number of items per page.

Next, in your corresponding view file (index.html.erb), you can display the paginated items:

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The will_paginate method generates the pagination links automatically based on the pagination settings applied to @items.

Customizing Pagination

will_paginate offers various options for customizing the pagination display. For example, you can customize the appearance of pagination links using CSS, or adjust the number of links shown.

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In this example, we customized the labels for the previous and next links.

Conclusion

Implementing pagination in a Ruby on Rails application using the will_paginate gem is simple and effective. By paginating large datasets, you can enhance the performance of your application and provide a better user experience. Remember to explore the documentation of will_paginate for more advanced customization options and features.