Large CharField

Description

This check identifies CharField instances with a max_length value that exceeds a specified threshold (default: 255) and recommends using a TextField instead for storing long strings.

Rationale

TextField is more efficient for storing and retrieving long text values. By using a TextField instead of a large CharField, you can improve performance and reduce the likelihood of reaching the maximum allowed length for a character field.

Example

Consider the following model:

from django.db import models

class BlogPost(models.Model):
    title = models.CharField(max_length=100)
    content = models.CharField(max_length=5000)

The content field is a CharField with a max_length of 5000, which is considered large. The check would detect this and recommend using a TextField instead:

content = models.TextField()

By using a TextField for the content field, you can store longer text values more efficiently and avoid reaching the maximum allowed length for a character field.