好的，所以我为此搜索了高低，而且两个文档，以及Google上的几乎所有页面都告诉我，我的代码应该是合法的。
让我先来看看models.py：
class Network(models.Model):
title = models.CharField(max_length=50)
description = models.CharField(max_length=500)
created = models.DateTimeField(auto_now_add=True)
updated = models.DateTimeField(auto_now=True)
def __unicode__(self):
return self.id
class NetworkForm(ModelForm):
class Meta:
model = Network
class Range(models.Model):
network = models.ForeignKey(Network)
range_start = models.GenericIPAddressField(unpack_ipv4=True)
range_end = models.GenericIPAddressField(unpack_ipv4=True)
range_title = models.CharField(max_length=50)
range_description = models.CharField(max_length=300)
def __unicode__(self):
return self.range_title
class RangeForm(ModelForm):
class Meta:
model = Range
exclude = ('network',)
然后我的views.py：
@login_required(login_url='/login/')
def add_network(request):
if request.method == "POST":
net_form = NetworkForm(request.POST)
range_formset = RangeForm(request.POST)
if net_form.is_valid and range_formset.is_valid:
net_form.save(commit=False)
range_formset.network = net_form
range_formset.save()
net_form.save()
return HttpResponseRedirect('/')
else:
net_form = NetworkForm()
range_form = RangeForm()
return render_to_response('networks/add.html', {
"net_form": net_form,
"range_form": range_form,
}, context_instance=RequestContext(request))
我的模板：
{% extends 'base.html' %}
{% block title %}Add Network{% endblock %}
{% block content %}
<div class="row-fluid">
<div class="span7 offset2 well">
<h3>Add network:</h3>
<hr />
<form class="form-horizontal" method="post" action="">
{% csrf_token %}
{{ net_form }}
<h4>Add a range to the network:</h4>
<hr />
<div class="form-inline">
{{ range_form }}
</div>
<hr />
<button type="submit" class="btn btn-primary btn-large">Add network</button>
</form>
</div>
</div>
{％endblock％}
现在，大多数情况都是显而易见的，我在这里失踪了，只是没有做出最后的连接。如果有人能够启发我会很棒。
PS：如果有人想通过查看MySQL Workbench，MySQL Commandline客户端以及manage.py dbshell和inspectdb来验证我的模型，则所有id列都存在。我甚至删除了整个数据库并使用manage.py重新创建它。现在我的齿轮磨了大约一个星期，所以有时间寻求帮助。如果有人能帮助我解决这个问题，那就太棒了！
这是追溯：
Environment:
Request Method: POST
Request URL: http://localhost:8000/network/add/
Django Version: 1.5
Python Version: 2.7.3
Installed Applications:
('django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.sites',
'django.contrib.messages',
'django.contrib.staticfiles',
'django.contrib.admin',
'django_nose',
'networks')
Installed Middleware:
('django.middleware.common.CommonMiddleware',
'django.contrib.sessions.middleware.SessionMiddleware',
'django.middleware.csrf.CsrfViewMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.contrib.messages.middleware.MessageMiddleware',
'django.middleware.clickjacking.XFrameOptionsMiddleware')
Traceback:
File "/usr/local/lib/python2.7/dist-packages/django/core/handlers/base.py" in get_response
115. response = callback(request, *callback_args, **callback_kwargs)
File "/usr/local/lib/python2.7/dist-packages/django/contrib/auth/decorators.py" in _wrapped_view
25. return view_func(request, *args, **kwargs)
File "/home/alexander/PycharmProjects/NOC/networks/views.py" in add_network
29. range_form.save()
File "/usr/local/lib/python2.7/dist-packages/django/forms/models.py" in save
370. fail_message, commit, construct=False)
File "/usr/local/lib/python2.7/dist-packages/django/forms/models.py" in save_instance
87. instance.save()
File "/usr/local/lib/python2.7/dist-packages/django/db/models/base.py" in save
546. force_update=force_update, update_fields=update_fields)
File "/usr/local/lib/python2.7/dist-packages/django/db/models/base.py" in save_base
650. result = manager._insert([self], fields=fields, return_id=update_pk, using=using, raw=raw)
File "/usr/local/lib/python2.7/dist-packages/django/db/models/manager.py" in _insert
215. return insert_query(self.model, objs, fields, **kwargs)
File "/usr/local/lib/python2.7/dist-packages/django/db/models/query.py" in insert_query
1673. return query.get_compiler(using=using).execute_sql(return_id)
File "/usr/local/lib/python2.7/dist-packages/django/db/models/sql/compiler.py" in execute_sql
937. cursor.execute(sql, params)
File "/usr/local/lib/python2.7/dist-packages/django/db/backends/util.py" in execute
41. return self.cursor.execute(sql, params)
File "/usr/local/lib/python2.7/dist-packages/django/db/backends/mysql/base.py" in execute
127. six.reraise(utils.IntegrityError, utils.IntegrityError(*tuple(e.args)), sys.exc_info()[2])
File "/usr/local/lib/python2.7/dist-packages/django/db/backends/mysql/base.py" in execute
120. return self.cursor.execute(query, args)
File "/usr/lib/python2.7/dist-packages/MySQLdb/cursors.py" in execute
174. self.errorhandler(self, exc, value)
File "/usr/lib/python2.7/dist-packages/MySQLdb/connections.py" in defaulterrorhandler
36. raise errorclass, errorvalue
Exception Type: IntegrityError at /network/add/
Exception Value: (1048, "Column 'network_id' cannot be null")
答案 0 :(得分：3)
您至少有四个错误。
首先，您必须实际调用 is_valid：它是一种方法，而不是属性。
其次，form.save(commit=False) 返回模型实例。它不会将表单对象神奇地转换为实例。您需要将其分配给变量，然后在该变量上设置额外属性。
第三，你在错误的对象上做commit=False - 你应该在你想要修改的那个上做。
第四，除非表格有效，否则不要重定向。
所以：
range_form = RangeForm(request.POST)
if net_form.is_valid() and range_form.is_valid():
net_obj = net_form.save()
range_obj = range_form.save(commit=False)
range_obj.network = net_obj
range_obj.save()
return HttpResponseRedirect('/')
else:
net_form = NetworkForm()
range_form = RangeForm()
return render_to_response('networks/add.html', {
"net_form": net_form,
"range_form": range_form,
}, context_instance=RequestContext(request))
（并且当它们不是时，不要调用formsets，它们只是表单。除了当然你实际上应该使用范围表单的内联表单集，但这是一个单独的问题。）