Django-使用自動字段和外鍵填充「更新/編輯」表單

Question

我是Django的新手，我正在創建一個應用程序來創建和顯示我公司的員工數據。 當前模型，新員工表單，員工表格顯示，登錄/註銷，所有作品。我正在編輯當前列表。 我已懸停在行鏈接上，將pk（employeeid）通過url並且表單正確填充 - 除了許多tomanyfields沒有填充，並且pk正在遞增，導致重複條目（除了所做的任何數據更改外） 。

我只會放入代碼示例，因爲模型/表單總共有35個字段，這使得我手動執行表單字段（以實現更漂亮的格式）的方式獲得非常長的代碼。

#view.py #SEE EDIT BELOW FOR CORRECT METHOD 
@login_required 
def employee_details(request, empid): #empid passed through URL/link 
    obj_list = Employee.objects.all() 
    e = Employee.objects.filter(pk=int(empid)).values()[0] 
    form = EmployeeForm(e) 
    context_instance=RequestContext(request) #I seem to always need this for {%extend "base.html" %} to work correctly 
     return render_to_response('employee_create.html', locals(), context_instance,) 

#URLconf 
    (r'^employee/(?P<empid>\d+)/$', employee_details), 

# snippets of employee_create.html. The same template used for create and update/edit, may be a source of problems, they do have different views- just render to same template to stay DRY, but could add an additional layer of extend for differences needed between the new and edit requests EDIT: added a 3rd layer of templates to solve this "problem". not shown in code here- easy enough to add another child template 
{% extends "base.html" %} 
{% block title %}New Entry{% endblock %} 
{% block content %} 
<div id="employeeform">  
    {% if form.errors %} 
     <p style="color: red;"> 
      Please correct the error{{ form.errors|pluralize }} below. 
     </p> 
    {% endif %} 
    <form action="/newemp/" method="post" class="employeeform">{% csrf_token %} #SEE EDIT 
     <div class="left_field"> 
      {{ form.employeeid.value }} 

      {{ form.currentemployee.errors }} 
      <label for="currentemployee" >Current Employee?</label> 
      {{ form.currentemployee }}<br/><br/> 

      {{ form.employer.errors }} 
      <label for="employer" class="fixedwidth">Employer:</label> 
      {{ form.employer }}<br/> 

      {{ form.last_name.errors }} 
      <label for="last_name" class="fixedwidth">Last Name:</label> 
      {{ form.last_name }}<br/> 

        {{ form.facility.errors }} #ManyToMany 
      <label for="facility" class="fixedwidth">Facility:</label> 
      {{ form.facility }}<br/><br/> 
       </div> 
     <div id="submit"><br/> 
     <input type="submit" value="Submit"> 
     </div> 
    </form> 



#models.py 
class Employee(models.Model): 
    employeeid = models.AutoField(primary_key=True, verbose_name='Employee ID #') 
     currentemployee = models.BooleanField(null=False, blank=True, verbose_name='Current Employee?') 
     employer = models.CharField(max_length=30) 
     last_name = models.CharField(max_length=30) 
     facility = models.ForeignKey(Facility, null=True, blank=True) 

base.html文件只是對頂部的頭，左邊的菜單和一個大的空div在形式，員工桌等所有延伸到。

screenshot2

那麼，如何做我需要改變我的觀點和/或在模板中更新條目，而不是創建一個新的？ （ 如何填充正確的foriegnkeys？（下拉框有可用的正確選項，但即使原始數據庫條目包含正確信息，也會選擇「-----」。

讓我知道如果我需要包括更多的文件/代碼 我也有更多的照片，但我無法鏈接更多或插入他們作爲新用戶：<我只需要貢獻並幫助其他人：D

編輯： 我一直在努力，並沒有太多。我仍然無法獲得下拉字段來選擇保存在數據庫中的值（SQLite3）。 但我主要的問題是試圖弄清楚是如何做到的保存爲更新，而不是新條目。 save（force_update = True）不適用於默認的ModelForm保存參數。

Answer 1

views.py 
    def employee_details(request, empid): 
     context_instance=RequestContext(request) 
     obj_list = Employee.objects.all() 

     if request.method == 'POST': 
      e = Employee.objects.get(pk=int(empid)) 
      form = EmployeeForm(request.POST, instance=e) 
      if form.is_valid(): 
       form.save() 
       return HttpResponseRedirect('/emp_submited/') 
     else: 
      e = Employee.objects.get(pk=int(empid)) 
      form = EmployeeForm(instance=e) 
     return render_to_response('employee_details.html', {'form': form}, context_instance,) 

也改變模板形式的行動「」（從/ newemp /這是我的新員工tempalte正確的位置，但不能更新。

感謝this similar question。

Answer 2

更新在djnago中的表格很簡單： 步驟： 1.提取表格的先前數據並填入編輯表格，並將這些詳細信息顯示給用戶 2.從編輯表格中獲取新數據並將其存儲到數據庫中

第一步： 得到以前的數據

views.py

def edit_user_post(request, topic_id): 
    if request.method == 'POST': 
     form = UserPostForm(request.POST) 
     if form.is_valid(): 
      #let user here be foreign key for the PostTopicModel 
      user = User.objects.get(username = request.user.username) 
      #now set the user for the form like: user = user 

      #get the other form values and post them 
      #eg:topic_heading = form.cleaned_data('topic_heading') 
      #save the details into db 
      #redirect 
    else: 
     #get the current post details 
     post_details = UserPostModel.objcets.get(id = topic_id) 
     data = {'topic_heading':topic.topic_heading,'topic_detail':topic.topic_detail,'topic_link':topic.topic_link,'tags':topic.tags} 
     #populate the edit form with previous details: 
     form = UserPostForm(initial = data) 
    return render(request,'link_to_template',{'form':form})