Скачать или смотреть Resolving the Multiple slug_field Issue in Django Rest Framework's SlugRelatedField

Learn how to effectively combine `first_name` and `last_name` into a single field in Django Rest Framework when using SlugRelatedField.
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This video is based on the question https://stackoverflow.com/q/63266352/ asked by the user 'Rahul Sharma' ( https://stackoverflow.com/u/11082866/ ) and on the answer https://stackoverflow.com/a/63426186/ provided by the user 'Yasser_1D' ( https://stackoverflow.com/u/10630787/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Solving the Multiple Slug Field Issue in Django Rest Framework

When working with Django Rest Framework (DRF), you may encounter situations where you want to represent complex data in a simplified format. One common scenario involves needing to combine multiple fields from a model into one to make it more readable in your API response. This guide addresses a specific challenge: expanding a sales_order field to include both the first_name and last_name of a related user object.

The Problem

In your Django application, you have a JSON response that looks like this:

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

In this representation, sales_order is an object that should be replaced by a user's full name, which is a concatenation of first_name and last_name. The initial attempt to use SlugRelatedField to achieve this may have resulted in the following error:

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

The issue arises because you're trying to directly concatenate the fields within the slug_field argument of SlugRelatedField, which is not supported. Let's explore how to solve this problem effectively.

The Solution

To successfully combine the first_name and last_name attributes into a single slug field, follow these steps:

Step 1: Create a Property in Your Model

You can create a property in your model to concatenate the first_name and last_name into a single string. Here’s how you can do it:

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

Step 2: Update Your Serializer

Once you've defined the full_name property in your model, you can update your serializer to use this property as the slug_field.

Here’s the modified serializer:

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

Step 3: Integrating Everything in Your Main Serializer

Finally, ensure that your main serializer correctly includes this AtableSOSerializer.

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

Summary

By following these steps, you can easily expand a field like sales_order to include your specified user attributes in a JSON response. Creating a method on your model makes it versatile and easy to read from your API. Just remember:

Define a property in your model to combine fields.

Reference that property in your serializer using slug_field.

This approach not only resolves the initial error but also enhances the clarity and usability of your API's output. Happy coding!