Скачать или смотреть Render All Values of Each jsonObject in a jsonArray with the Pebble Template Engine and Java Vert.x

Discover how to efficiently render multiple `jsonObject` values from a `jsonArray` with the Pebble template engine using Java and Vert.x.
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How to Render All Values of Each jsonObject in a jsonArray with Pebble Templates in Java Vert.x

When working with JSON data in web applications, you may encounter situations where you need to display multiple entries, particularly when using template engines. If you are using the Pebble template engine along with the Java Vert.x framework, you might have found yourself facing the challenge of rendering a list of JSON objects from a JSON array. In this guide, we'll explore how to achieve this effectively.

The Problem

Imagine you have a JSON array containing films, and you want to render each film's details—like Date, Title, and MainActor—in an HTML table format. Here's the template code you might be using:

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However, you have encountered an issue where the rendering process only displays either the first or last film in the array. The root of the issue lies in how you are processing and passing the data to Pebble for rendering.

The Solution

To resolve this issue, we will modify the Java code for handling the JSON array. Here’s a structured step-by-step approach to ensure all films are rendered properly:

Step 1: Retrieve Your JSON Array

First, ensure that your JSON array is being retrieved correctly from the asynchronous result. Here’s how you can do this:

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This code checks if the operation for retrieving the JSON data was successful and fetches the "Films" array.

Step 2: Process the JSON Array

Instead of rendering each film one by one, we'll collect all films into a list. This list will hold maps of each film's details, which we can then pass to the template engine.

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This loop iterates through the JSON array, adding each film's details to a list.

Step 3: Prepare Template Variables

Next, we'll create a map for template variables and put our list of films into it.

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By using this map, we'll make it easy for the Pebble template to access our films list.

Step 4: Render the Template

Finally, we want to render our template with the list of films. Instead of rendering each item separately, we do it once with the complete list.

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This code sends the complete list of films to Pebble for rendering, ensuring that all films are displayed at once.

Updated Template Code

Make sure to update your Pebble template to iterate over the new list correctly. Here’s how your template should look:

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

Here, we reference dataFilm from the films list, allowing Pebble to iterate correctly and render all entries.

Conclusion

By following these steps, you can efficiently render all values from a JSON array in your web application using Pebble templates and Java with Vert.x. This method not only avoids rendering limitations but also organizes your data handling for better readability and maintainability. Try this solution in your project and enjoy seamless rendering of your JSON data!