如何实现 Django 不区分大小写的模型字段? [英] How to Implement Django Case Insensitive Model Field?

问题描述

Django 没有不区分大小写的模型字段，那么如何在不破坏现有代码的情况下使模型字段不区分大小写?例如:我的 UserModel 上有一个 username 字段，但我注意到尽管使该字段唯一，但它仍然允许我使用相同单词的大小写变体:

Django do not come with case insensitive model field so how do I make a model field case insensitive without breaking my existing codes? For example: I have a username field on my UserModel but I noticed that despite making the field unique it would still allow me to use the case variant of the same word:

示例如下:

from django.db import models

class UserModel(models.Model):

    username = models.CharField(max_length=16, unique=True)



user1 = UserModel(username='user1') # will go through

user1.save()


user2 = UserModel(username='User1') # will still go through

user2.save()

推荐答案

有很多方法可以解决这个问题，但我会推荐使用 django-case-insensitive-field"https://pypi.org/project/django-case-insensitive-field/" rel="nofollow noreferrer">pypi.org.

There a lot of approaches to solve this problem but I will recommend using django-case-insensitive-field from pypi.org.

这个包没有依赖，而且很轻.

The package has no dependency and it's light.

1. 从 pypi.org 安装

pip install django-case-insensitive-field

1. 创建一个 fields.py 文件

1. Create a fields.py file

向您希望不区分大小写的 Field 添加一个 Mixin.下面的例子:

Add a Mixin to the Field you want to make case insensitive. Example below:

# fields.py

from django_case_insensitive_field import CaseInsensitiveFieldMixin
from django.db.models import CharField

class LowerCharField(CaseInsensitiveFieldMixin, CharField):
    """[summary]
    Makes django CharField case insensitive \n
    Extends both the `CaseInsensitiveFieldMixin` and  CharField \n
    Then you can import 
    """

    def __init__(self, *args, **kwargs):

        super(CaseInsensitiveFieldMixin, self).__init__(*args, **kwargs)

1. 在模型/代码中的任何地方使用新字段

# models.py

from .fields import LowerCharField


class UserModel(models.Model):

    username = LowerCharField(max_length=16, unique=True)

user1 = UserModel(username='user1') # will go through


user2 = UserModel(username='User1') # will not go through

仅此而已！

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