FK不填充在Django的形式

Question

我有一個小問題，要求社區。我想知道爲什麼當我去編輯表單時我的外鍵不會顯示出來。當我去編輯信息時，除了狀態（這是一個從狀態表指向項目表的外鍵），我的所有數據都被填充，但沒有任何選擇。我使用相同的forms.py來添加和編輯信息。

models.py

from django.db import models 
from clients.models import Clients 
from django.contrib.auth.models import User 
from settings import STATUS_CHOICES 

class Project(models.Model): 
client = models.ForeignKey(Clients, related_name='projects') 
created_by = models.ForeignKey(User, related_name='created_by') 


#general information 
proj_name = models.CharField(max_length=255, verbose_name='Project Name') 
pre_quote = models.CharField(max_length=3,default='10-') 
quote = models.IntegerField(max_length=10, verbose_name='Quote #', unique=True) 
desc = models.TextField(verbose_name='Description') 
starts_on = models.DateField(verbose_name='Start Date') 
completed_on = models.DateField(verbose_name='Finished On') 

def __unicode__(self): 
    return u'%s' % (self.proj_name) 

def current_status(self): 
     try: 
       return self.status.all().order_by('-id')[:1][0] 
     except: 
      return None 



class Status(models.Model): 
project = models.ForeignKey(Project, related_name='status') 
value = models.CharField(max_length=20, choices=STATUS_CHOICES, verbose_name='Status') 
date_created= models.DateTimeField(auto_now=True) 

def __unicode__(self): 
    return self.value 

class Meta: 
    verbose_name = ('Status') 
    verbose_name_plural = ("Status") 

views.py

@login_required 
def addProject(request): 
if request.method == 'POST': 
    form = AddSingleProjectForm(request.POST) 
    if form.is_valid(): 
     project = form.save(commit=False) 
     project.created_by = request.user 
     project.save() 
     project.status.create(
       value = form.cleaned_data.get('status', None) 
     )    
     return HttpResponseRedirect('/project/') 
else: 
    form = AddSingleProjectForm() 

return render_to_response('project/addProject.html', { 
'form': form, 'user':request.user}, context_instance=RequestContext(request)) 

@login_required 
def editProject(request, proj_id): 
proj = Project.objects.get(pk=proj_id) 
if request.method == 'POST': 
    form = AddSingleProjectForm(request.POST,instance=proj) 
    if form.is_valid():  
     form.save() 
     return HttpResponseRedirect('/project/') 
else: 
    form = AddSingleProjectForm(instance=proj) 

return render_to_response('project/edit_project.html', { 
     'form': form}, context_instance=RequestContext(request)) 

forms.py

from django.db import models 
from project.models import Project, Status 
from django.forms import * 
from django import forms 
from settings import STATUS_CHOICES 

class AddSingleProjectForm(ModelForm): 
    status = forms.ChoiceField(choices=STATUS_CHOICES) 
    class Meta: 
     model = Project 
     exclude = ('pre_quote', 'created_by') 

從editproject模板

段：

{% block content %} 
<FORM METHOD="POST" ACTION=""> 
{% csrf_token %} 
<table> 
    {{ form.as_table }} 
</table> 
<input type="submit" value="Save Project"> 
</FORM> 
{% endblock %} 

任何建議將不勝感激。

謝謝。

Answer 1

我認爲這是因爲項目被定義爲ForeignKey的狀態，而不是相反。 ForeignKey是一對多的關係。每個項目可以有多個狀態連接到它。

這就是爲什麼在項目實例中你會發現：project.status_set而不是project.status。

您需要通過查找連接到項目的最新狀態手動將狀態添加到表單。或者可能將ForeignKey更改爲OneToOne關係，具體取決於您的要求。