Javascript Django数据库关系模型中的多选字段

这是我在Stackoverflow上的第一篇帖子，所以请忽略错误。在发布之前，我尝试了十几种解决方案，但都没有奏效。我在模型中为用户提供了表关系。我需要创建一个模型表单，让客户从前端为任何项目选择多个用户。我很难用代码实现它。另外，对于另一个字段，我需要将选择限制为一个用户。下面是代码

型号：

class Project(models.Model):
   project_name = models.CharField(max_length=100)
   assigned_to = models.ManyToManyField(User)
   project_url = models.URLField()

def __init__(self):
    return str(self.project_name)

形式

视图：

def projects(request):
   template = 'projects/projects.html'
   if request.method == 'POST':
       form = ProjectForm(request.POST)
       if form.is_valid():
         form.save()
   else:
     form = ProjectForm()
   return render(request, template, {'form': form})

HTML:

{%csrf_令牌%}
{{form}}
提交

非常感谢您的帮助

forms.py：

from django import forms
from .models import Project
class ProjectForm(forms.ModelForm):
    def __init__(self, *args, **kwargs):
        assigned_users = kwargs.pop('assigned_to', [])
        super(ProjectForm, self).__init__(*args, **kwargs)
        for field in self.fields.values():
            field.widget.attrs = {"class": "form-control"}
        self.fields['project_name'].required = True
        self.fields['project_url'].required = True

        if assigned_users:
            self.fields['assigned_to'].queryset = assigned_users
        self.fields['assigned_to'].required = True

        self.fields['project_name'].widget.attrs.update({
            'placeholder': 'Project Name'})
        self.fields['project_url'].widget.attrs.update({
            'placeholder': 'Project URL'})
    class Meta:
        model = Project
        fields = ('project_name', 'project_url', 'assigned_to')

views.py

def create_project(request):
    template_name = "create.html"
    users = []

    form = ProjectForm(assigned_to=users)

    if request.method == 'POST':
        form = ProjectForm(request.POST, request.FILES, assigned_to=users)
        if form.is_valid():
            proj_obj = form.save(commit=False)
            proj_obj.created_by = request.user
            proj_obj.save()

            if request.POST.getlist('assigned_to', []):
                proj_obj.assigned_to.add(*request.POST.getlist('assigned_to'))
                assigned_to_list = request.POST.getlist('assigned_to')
            success_url = reverse('projects:list')
            if request.POST.get("savenewform"):
                success_url = reverse("leads:add_lead")
            return JsonResponse({'error': False, 'success_url': success_url})
        return JsonResponse({'error': True, 'errors': form.errors})
    context = {}
    context["proj_form"] = form
    context["users"] = users

    context["assignedto_list"] = [
        int(i) for i in request.POST.getlist('assigned_to', []) if i]

    return render(request, template_name, context)

create.html：

<div class="form-control">
    {{ proj_form.project_name }}
    {{ proj_form.assigned_to }}
    {{ proj_form.project_url }}

</div>

{{proj_form.project_name}
{{proj_form.assigned_to}}
{{proj_form.project_url}

在这种情况下，我有一个带有复选框的用户列表。在提交时，我有一个post请求发送用户列表，在views.py中，我将从request.post获取列表，同时覆盖post方法，然后在该列表中循环并添加用户pk。。类似于“``的内容用于选定项目中的pk:try:user=user.objects.get（pk=pk）project.project\u users.add（user）除了User.DoesNotExist：continue``不知道这是否是您想要的解决方案，但我有一个确切的目标来实现它，就像在添加问题时在StackOverFlow选择“标记”。但对于初学者来说，这个列表已经足够了，我会在以后自己添加自动完成。哇，老兄，牛眼。非常感谢你的帮助。我编辑了自己的代码，这是我正在做的。忽略JSON部分，因为我很忙。

def create_project(request):
    template_name = "create.html"
    users = []

    form = ProjectForm(assigned_to=users)

    if request.method == 'POST':
        form = ProjectForm(request.POST, request.FILES, assigned_to=users)
        if form.is_valid():
            proj_obj = form.save(commit=False)
            proj_obj.created_by = request.user
            proj_obj.save()

            if request.POST.getlist('assigned_to', []):
                proj_obj.assigned_to.add(*request.POST.getlist('assigned_to'))
                assigned_to_list = request.POST.getlist('assigned_to')
            success_url = reverse('projects:list')
            if request.POST.get("savenewform"):
                success_url = reverse("leads:add_lead")
            return JsonResponse({'error': False, 'success_url': success_url})
        return JsonResponse({'error': True, 'errors': form.errors})
    context = {}
    context["proj_form"] = form
    context["users"] = users

    context["assignedto_list"] = [
        int(i) for i in request.POST.getlist('assigned_to', []) if i]

    return render(request, template_name, context)

<div class="form-control">
    {{ proj_form.project_name }}
    {{ proj_form.assigned_to }}
    {{ proj_form.project_url }}

</div>