django ModelMultipleChoiceField设置初始值 [英] django ModelMultipleChoiceField set initial values

问题描述

我有以下代码：

category = forms.ModelMultipleChoiceField(
    label="Category",
    queryset=Category.objects.order_by('name'),
    widget=forms.Select(
        attrs={
            'placeholder': 'Product Category', 'class': 'form-control'}),
    required=True
)

在选择类别之类的选择框中设置初始值，以便选择框应具有初始值为选择类别的类别列表

how do I set an initial value in the select box like "Choose a category" so that the select box should have a list of categories with the initial value being "Choose a category"

推荐答案

如果您将 QuerySet 对象作为初始值传递，并且 widget = forms.CheckboxSelectMultiple ，则未选中复选框。我必须将 QuerySet 对象转换为列表，然后选中复选框：

If you pass a QuerySet object as an initial value and if widget=forms.CheckboxSelectMultiple, then the check boxes are not checked. I had to convert the QuerySet object to a list, and then the check boxes were checked:

YourForm(initial={'multi_field':
    [cat for cat in Category.objects.all().values_list('id', flat=True)]
    })

这篇关于django ModelMultipleChoiceField设置初始值的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！