Question

在我的对象Chair的管理员中，我有TabularInline个任意数量的Desk个对象。我希望每个Chair始终至少有一个Desk对象与之关联。有没有办法让管理界面强制用户输入至少一个Desk？如果没有输入Desk，则显示错误？

Answer 1

使用akaihola的答案，这是一个更完整的例子：

将此添加到您的forms.py：

from django import forms
from django.forms.models import BaseInlineFormSet

class AtLeastOneRequiredInlineFormSet(BaseInlineFormSet):

    def clean(self):
        """Check that at least one service has been entered."""
        super(AtLeastOneRequiredInlineFormSet, self).clean()
        if any(self.errors):
            return
        if not any(cleaned_data and not cleaned_data.get('DELETE', False)
            for cleaned_data in self.cleaned_data):
            raise forms.ValidationError('At least one item required.')

然后，在你的admin.py中：

class DeskInline(admin.TabularInline):
    model = Desk
    formset = AtLeastOneRequiredInlineFormSet

class ChairAdmin(admin.ModelAdmin):
    inlines = [DeskInline,]

admin.site.register(Chair, ChairAdmin)

Answer 2

要求至少一个项目的通用FormSet clean()方法：

    def clean(self):
        """Check that at least one service has been entered."""
        super(MyFormSet, self).clean()
        if any(self.errors):
            return
        if not any(cleaned_data and not cleaned_data.get('DELETE', False)
                   for cleaned_data in self.cleaned_data):
            raise forms.ValidationError('At least one item required.')

这适用于普通表格集，模型表格集和内联模型表单集。

Answer 3

Matthew Flanagan有一个很好的例子，说明如何在表单集中要求一个有效的表单：http://code.google.com/p/wadofstuff/wiki/WadOfStuffDjangoForms和http://wadofstuff.blogspot.com/2009/08/requiring-at-least-one-inline-formset.html 希望能帮到你。

Django：强制管理员用户在TabularInline中输入至少一个项目

3 个答案: