用户的 Django MultipleChoiceField 选择抛出错误

Question

我正在尝试编写一个表单，允许用户select 任意数量的来自特定组的用户。但是，当我尝试使用用户列表作为选项时，我收到一条错误消息，指出 'User' 对象不支持索引。

这是一种相当标准的形式，主要区别在于该组是根据传递给该形式的 kwarg 进行过滤的。向表单传递 project_id（项目对象主键），然后它会找到与该项目关联的组并生成字段。

来自forms.py

class ModifyTeamForm(forms.Form):

    action = ChoiceField(choices=[('remove', 'Remove users'), ('promote', 'Promote to lead.')])



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

        # The project to get the team for
        project_id = kwargs.pop('project_id', None)

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

        project = Project.objects.get(pk=project_id)

        # Team for this project
        team = User.objects.filter(groups__name=project.project_name)

        # Create a form field to select current team members
        current_team = MultipleChoiceField(required=True, choices = team, widget=CheckboxSelectMultiple)

        # Add the field
        self.fields['current_team'] = current_team

我的views.py

@login_required
def team(request, project_id): 

    if request.method == "POST": 
        # Not yet implemented
        return
    else: 
        form = ModifyTeamForm(project_id=project_id)

        template = loader.get_template('projects/team.html')

        context = RequestContext(request, {
            'form': form,
        })

        return HttpResponse(template.render(context))

Answer 1

这是因为 MultipleChoiceField.choices 应该是一个有效的二维数组 (https://docs.djangoproject.com/en/1.7/ref/forms/fields/#django.forms.ChoiceField.choices)。

所以你可以这样做：

team = [(u.pk, u.email) for u in User.objects.filter(groups__name=project.project_name)]

这将 return 为您提供一个包含

组合的列表

[('user1.pk', 'user1.email'), ('user2.pk', 'user2.email'),...]

可用作 choices。

用户的 Django MultipleChoiceField 选择抛出错误

Django MultipleChoiceField choices of users throws error

python

django

django-forms