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Play Framework essentials

You're reading from   Play Framework essentials An intuitive guide to creating easy-to-build scalable web applications using the Play framework

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Product type Paperback
Published in Sep 2014
Publisher
ISBN-13 9781783982400
Length 200 pages
Edition 1st Edition
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Author (1):
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Julien Richard-Foy Julien Richard-Foy
Author Profile Icon Julien Richard-Foy
Julien Richard-Foy
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Toc

Table of Contents (9) Chapters Close

Preface 1. Building a Web Service FREE CHAPTER 2. Persisting Data and Testing 3. Turning a Web Service into a Web Application 4. Integrating with Client-side Technologies 5. Reactively Handling Long-running Requests 6. Leveraging the Play Stack – Security, Internationalization, Cache, and the HTTP Client 7. Scaling Your Codebase and Deploying Your Application Index

Using the JavaScript reverse router

There is a major issue with the preceding JavaScript code; the way it computes the URL of the Items.delete route is very fragile because it duplicates the route definition:

xhr.open('DELETE', '/items/' + btn.dataset.id);

If you change the route definition, you will also have to accordingly change the preceding line of code.

We can solve this issue by putting the route information in the HTML attributes, instead of putting the item ID, as follows:

<li>
  <a href="@routes.Items.details(item.id)">@item.name</a>
  @defining(routes.Items.delete(item.id)) { route =>
  <button class="delete-item"
            data-url="@route.url"
            data-method="@route.method">Delete</button>
  }
</li>

However, in practice, this approach does not scale; in practice, you often need to compute URLs from the client side. Fortunately, this is exactly what the JavaScript reverse...

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