在ModelForm中的排序选择ManytoManyField DJANGO [英] Ordering Choices in ModelForm ManytoManyField DJANGO

问题描述

我在我的models.py

I have in my models.py

class Business(models.Model):
   industry = models.models.ManyToManyField(Industry)

in forms.py

in forms.py

class BusinessForm(forms.ModelForm):
    class Meta:
        model = Business

当我呈现表单时，行业名称将显示在多个选择框中。

When I render the form, the industry names appear in a multiple select box. What do I do to make the industry names in alphabetical order?

推荐答案

有几种方法：

您可以在每个表单的基础上重写查询集排序，设置排序元类选项，或使用排序方法覆盖模型管理器查询集。

You can override the queryset ordering on a per-form basis, set the ordering meta class option, or override the model manager queryset with an ordering method.

class IndustryManager(models.Manager):
    def get_query_set(self):
        return (
            super(IndustryManager, self)
            .get_query_set()
            .order_by('name')
        )

class Industry(models.Model):
    name = models.CharField(max_length=128)
    objects = IndustryManager()

指定全局元选项排序

Specify global meta option ordering

class Industry(models.Model):
    name = models.CharField(max_length=128)

    class Meta:
        ordering = ['name']

每个订单

Per form ordering

class MyForm(forms.ModelForm):
    class Meta:
        model = Business

    def __init__(self, *args, **kwargs):
        super(MyForm, self).__init__(*args, **kwargs)   
        self.fields['industry'].queryset = Industry.objects.order_by('name')

如果您正在处理django管理员，还有一个名为formfield_for_manytomany的快捷方式。

There's also a shortcut called formfield_for_manytomany if you are dealing with the django admin.

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