javascript - 具有数据库关系的 Django 的 ModelForm 中的 MultichoiceField
问题描述
这是我在 Stackoverflow 上的第一篇文章,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。我在用户模型中有表关系。我需要创建一个 ModelForm 让客户从前端为任何项目选择多个用户。我很难在代码中实现它。同样对于另一个领域,我需要将选择限制为一个用户。以下是代码。
楷模:
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。
class ProjectForm(forms.ModelForm)
class Meta:
fields = ['project_name', 'assigned_to ', 'project_url']
看法:
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:
<form action='' method='post'>
{% csrf_token %}
{{ form }}
<button type='submit' class='btn btn-primary'>Submit</button>
</form>
非常感谢一些帮助。
解决方案
表格.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')
视图.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)
创建.html:
<div class="form-control">
{{ proj_form.project_name }}
{{ proj_form.assigned_to }}
{{ proj_form.project_url }}
</div>
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