How to Get the Name or Label from Django's IntegerChoices Using a Value

Описание: Learn how to retrieve the name or label of an `IntegerChoices` member in Django, using just its integer value.
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This video is based on the question https://stackoverflow.com/q/70381558/ asked by the user 'Matt' ( https://stackoverflow.com/u/11148741/ ) and on the answer https://stackoverflow.com/a/70416726/ provided by the user 'Yevgeniy Kosmak' ( https://stackoverflow.com/u/12914274/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Retrieving the Name or Label from Django's IntegerChoices Using a Value

If you are working with Django, particularly with the IntegerChoices class introduced in Django 3.0, you might encounter a situation where you need to retrieve the name or label associated with a specific integer value. For example, you might have defined an IntegerChoices class for different types of addresses, and need to get the label for a value like 4 for a 'delivery address'. In this guide, we will discuss the problem and provide a clear, organized solution to help you achieve this.

The Problem

Let's consider the following IntegerChoices class:

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

You can easily access the name and label using the class attributes, like so:

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

However, the challenge arises when you only have the integer value (e.g., 4 for DELIVERY) and you want to obtain the associated name or label directly. Unfortunately, trying to access Type[4] does not work as intended because the enum values do not correspond directly to the integer values.

The Solution

To retrieve the name or label for a given integer value from an IntegerChoices class, you can utilize the choices property provided by IntegerChoices. This property gives you a list of all the choices, which you can then filter based on the integer value provided.

Here’s how you can implement a function to achieve this:

Step-by-Step Implementation

Access Choices: Use the Type.choices property to get a list of tuples containing all the values and their corresponding labels.

Filter by Value: Create a list comprehension to filter through the choices and return the label that matches the given integer value.

Return the Result: If a match is found, return the respective label; otherwise, return None.

Example Code

Here’s an example implementation of how to retrieve the label for an integer value:

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

Explanation of the Function

The label_by_type_value function takes an integer value as input.

It creates a list comprehension to go through the Type.choices, collects the labels where the first element (the value) matches the input value.

If there’s a match, it returns the first label found; otherwise, it returns None.

Conclusion

Using the method described above, you can effectively retrieve the name or label of an IntegerChoices member in Django using its integer value. This approach is not only efficient but also keeps your code clean and understandable. So next time you find yourself in a similar situation, you now have a reliable function ready to go!

By mastering this technique, you can improve your Django projects and enhance the user experience by providing meaningful labels derived from integer values. Happy coding!