Django:ModelMultipleChoiceField不选择初始选择
ModelMultipleChoiceField没有选择初始选择,并且在我的示例中,我无法进行以下修复
我的模型和表格:
class Company(models.Model): company_name = models.CharField(max_length=200)
class Contact(models.Model):
company = models.ForeignKey(Company)
first_name = models.CharField(max_length=100)
last_name = models.CharField(max_length=100)
class Action(models.Model):
company = models.ForeignKey(Company, blank=True, null=True)
from_company = models.ManyToManyField(Contact, verbose_name='Participant(s) from "Company"', blank=True, null=True)
class Action_Form(ModelForm):
from_company = forms.ModelMultipleChoiceField(queryset=Contact.objects.none(), widget=forms.CheckboxSelectMultiple())
class Meta:
model = Action
我的工作和结果:
>>> contacts_from_company = Contact.objects.filter(company__exact=1) # "1" for test, otherwise a variable>>> form = Action_Form(initial={'from_company': [o.pk for o in contacts_from_company]}) # as suggested in the fix
>>> print form['from_company']
<ul>
</ul>
>>> print contacts_from_company
[<Contact: test person>, <Contact: another person>]
>>> form2 = Action_Form(initial={'from_company': contacts_from_company})
>>> print form2['from_company']
<ul>
</ul>
>>> form3 = Action_Form(initial={'from_company': Contact.objects.all()})
>>> print form3['from_company']
<ul>
</ul>
我希望它可以工作的方式:
1.我的视图从request.GET获取“公司”
2.然后过滤该“公司”的所有“联系人”
3.最后,它创建一个表单并将这些“联系人”作为“初始= {…}”
两个问题:
1. [尚未回答]如何使ModelMultipleChoiceField接受那些“初始”值?
2. [已回答]作为替代,我可以将变量传递给Action_Form(ModelForm)以便在我的ModelForm中可以有:
from_company = forms.ModelMultipleChoiceField(queryset=Contact.objects.filter(company__exact=some_id) # where some_id comes from a view
回答:
你将需要添加一个__init__
方法来Action_Form
设置初始值,记住要通过super调用__init__
基ModelForm
类。
class Action_Form(forms.ModelForm): def __init__(self, *args, **kwargs):
super(Action_Form, self).__init__(*args, **kwargs)
self.fields['from_company'].queryset = Contact.object.filter(...
如果你打算将过滤器参数作为关键字args传递给Action_Form
,则需要在调用super之前将其删除:
myfilter = kwargs['myfilter']del kwargs['myfilter']
或者,可能更好:
myfilter = kwargs.pop('myfilter')
以上是 Django:ModelMultipleChoiceField不选择初始选择 的全部内容, 来源链接: utcz.com/qa/428207.html