我的模特：
class Person(models.Model):
name = models.CharField(max_length=250)
slug = AutoSlugField(populate_from='name')
birth_date = models.DateField(null=True, blank=True)
blood_group = models.CharField(max_length=5)
present_address = models.CharField(max_length=250, blank=True)
permanent_address = models.CharField(max_length=250, blank=True)
user = models.OneToOneField(
settings.AUTH_USER_MODEL,
related_name='member_persons')
我的观点：
@require_authenticated_permission(
'member.add_person')
class PersonCreate(CreateView):
template_name = 'member/person_form.html'
model = Person
success_url = '/person/'
form_class = MemberForm
def get_form(self, form_class=None):
form = super().get_form(form_class)
form.request = self.request
return form
我的表格是：
class MemberForm(ModelForm):
class Meta:
model = Person
exclude = ('user',)
def clean_user(self):
user = self.cleaned_data['user']
if Person.objects.filter(user=user).exists():
raise forms.ValidationError("You already submitted data")
return user
def save(self, commit=True):
person = super().save(commit=False)
if not person.pk:
person.user = get_user(self.request)
if commit:
person.save()
self.save_m2m()
return person
它适用于第一个人的情况但是当我尝试使用不同的数据再次提交成员表单时，它会给出以下完整性错误：
Traceback:
File "/home/ohid/test_venv/lib/python3.5/site-packages/django/db/backends/utils.py" in execute
64. return self.cursor.execute(sql, params)
File "/home/ohid/test_venv/lib/python3.5/site-packages/django/db/backends/sqlite3/base.py" in execute
337. return Database.Cursor.execute(self, query, params)
The above exception (UNIQUE constraint failed: member_person.user_id) was the direct cause of the following exception:
File "/home/ohid/test_venv/lib/python3.5/site-packages/django/core/handlers/exception.py" in inner
39. response = get_response(request)
File "/home/ohid/test_venv/lib/python3.5/site-packages/django/core/handlers/base.py" in _get_response
187. response = self.process_exception_by_middleware(e, request)
File "/home/ohid/test_venv/lib/python3.5/site-packages/django/core/handlers/base.py" in _get_response
185. response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "/home/ohid/test_venv/lib/python3.5/site-packages/django/views/generic/base.py" in view
68. return self.dispatch(request, *args, **kwargs)
File "/home/ohid/test_venv/lib/python3.5/site-packages/django/utils/decorators.py" in _wrapper
67. return bound_func(*args, **kwargs)
File "/home/ohid/test_venv/lib/python3.5/site-packages/django/contrib/auth/decorators.py" in _wrapped_view
23. return view_func(request, *args, **kwargs)
File "/home/ohid/test_venv/lib/python3.5/site-packages/django/utils/decorators.py" in bound_func
63. return func.__get__(self, type(self))(*args2, **kwargs2)
File "/home/ohid/test_venv/lib/python3.5/site-packages/django/utils/decorators.py" in _wrapper
67. return bound_func(*args, **kwargs)
File "/home/ohid/test_venv/lib/python3.5/site-packages/django/contrib/auth/decorators.py" in _wrapped_view
23. return view_func(request, *args, **kwargs)
File "/home/ohid/test_venv/lib/python3.5/site-packages/django/utils/decorators.py" in bound_func
63. return func.__get__(self, type(self))(*args2, **kwargs2)
File "/home/ohid/test_venv/lib/python3.5/site-packages/django/views/generic/base.py" in dispatch
88. return handler(request, *args, **kwargs)
File "/home/ohid/test_venv/lib/python3.5/site-packages/django/views/generic/edit.py" in post
217. return super(BaseCreateView, self).post(request, *args, **kwargs)
File "/home/ohid/test_venv/lib/python3.5/site-packages/django/views/generic/edit.py" in post
183. return self.form_valid(form)
File "/home/ohid/test_venv/lib/python3.5/site-packages/django/views/generic/edit.py" in form_valid
162. self.object = form.save()
File "/home/ohid/test_venv/persontest/member/forms.py" in save
37. person.save()
File "/home/ohid/test_venv/lib/python3.5/site-packages/django/db/models/base.py" in save
796. force_update=force_update, update_fields=update_fields)
File "/home/ohid/test_venv/lib/python3.5/site-packages/django/db/models/base.py" in save_base
824. updated = self._save_table(raw, cls, force_insert, force_update, using, update_fields)
File "/home/ohid/test_venv/lib/python3.5/site-packages/django/db/models/base.py" in _save_table
908. result = self._do_insert(cls._base_manager, using, fields, update_pk, raw)
File "/home/ohid/test_venv/lib/python3.5/site-packages/django/db/models/base.py" in _do_insert
947. using=using, raw=raw)
File "/home/ohid/test_venv/lib/python3.5/site-packages/django/db/models/manager.py" in manager_method
85. return getattr(self.get_queryset(), name)(*args, **kwargs)
File "/home/ohid/test_venv/lib/python3.5/site-packages/django/db/models/query.py" in _insert
1045. return query.get_compiler(using=using).execute_sql(return_id)
File "/home/ohid/test_venv/lib/python3.5/site-packages/django/db/models/sql/compiler.py" in execute_sql
1054. cursor.execute(sql, params)
File "/home/ohid/test_venv/lib/python3.5/site-packages/django/db/backends/utils.py" in execute
79. return super(CursorDebugWrapper, self).execute(sql, params)
File "/home/ohid/test_venv/lib/python3.5/site-packages/django/db/backends/utils.py" in execute
64. return self.cursor.execute(sql, params)
File "/home/ohid/test_venv/lib/python3.5/site-packages/django/db/utils.py" in __exit__
94. six.reraise(dj_exc_type, dj_exc_value, traceback)
File "/home/ohid/test_venv/lib/python3.5/site-packages/django/utils/six.py" in reraise
685. raise value.with_traceback(tb)
File "/home/ohid/test_venv/lib/python3.5/site-packages/django/db/backends/utils.py" in execute
64. return self.cursor.execute(sql, params)
File "/home/ohid/test_venv/lib/python3.5/site-packages/django/db/backends/sqlite3/base.py" in execute
337. return Database.Cursor.execute(self, query, params)
Exception Type: IntegrityError at /person/create/
Exception Value: UNIQUE constraint failed: member_person.user_id
我知道这是我模型领域的原因：
user = models.OneToOneField(
settings.AUTH_USER_MODEL,
related_name='member_persons')
我想在成员创建表单中显示“您已提交数据”的消息，而不是收到此错误。任何人都可以建议我怎么做到这一点。
编辑：
表单模板：
{% extends parent_template|default:"member/base_member.html" %}
{% load crispy_forms_tags %}
{% load i18n %}
{% block body %}
<div class="container-fluid">
<div class="row">
<div class="col-sm-12 col-md-7">
<div class="panel panel-default">
<div class="panel-body">
<form class="form-horizontal" action="" method="post" enctype="multipart/form-data">
{% csrf_token %}
{{ form|crispy }}
<div class="form-group">
<div class="col-sm-offset-6 col-sm-6">
<button type="submit" class="btn btn-success">Submit</button>
</div>
</div>
</form>
</div>
</div>
</div>
</div>
</div>
{% endblock %}
人员名单模板：
{% extends parent_template|default:"member/base_member.html" %}
{% load crispy_forms_tags %}
{% block body %}
{% if perms.member.add_person %}
<div class="page-header">
<div class="row">
<div class="col-sm-3 ">
<a class="btn btn-primary" href="{% url 'member:person-list' %}">View All Member</a>
</div>
<a class="btn btn-primary pull-right" href="{% url 'member:person-create' %}"><i class="icon-plus icon-white"></i> Add New Member</a>
</div>
</div>
{% endif %}
<div class="container-fluid">
<div class="row ">
<div style="overflow-x:auto;">
<div class="col-sm-8 col-md-9">
<h3>Members List</h3>
{% if persons %}
<table>
<tr>
<th>sl.</th>
<th>Name and Position</th>
<th>Photo</th>
<th>Organisation & Address</th>
<th>Contact</th>
</tr>
{% for person in persons %}
<tr>
<td>{{forloop.counter}}.</td>
<td><a href="{{person.get_absolute_url}}">
{{person.name}}
</a></td>
<td>{{person.birth_date}}</td>
<td>
{{person.blood_group}}<br>
{{person.present_address}}
</td>
{% if user.pk == person.user.pk or user.is_superuser %}
<td>
<a href="{{person.get_update_url}}">
<button type="button" class="btn btn-primary btn-sm">
<span class="glyphicon glyphicon-pencil">Update</span>
</button></a>
</td>
{% endif %}
<td><a href="{{person.get_delete_url}}">
<button type="submit" class="btn btn-default btn-sm">
<span class="glyphicon glyphicon-trash">Delete</span>
</button>
</a></td>
</tr>
{% endfor %}
</table>
{% else %}
<p>No person in the list.</p>
{% endif %}
</div>
</div>
</div>
</div>
{% endblock %}
答案 0 :(得分：0)
由于您从字段中排除了user，因此它不会运行您的clean_user方法。您可以使用clean表单方法。并field error
class MemberForm(ModelForm):
class Meta:
model = Person
exclude = ('user', )
def clean(self):
user = get_user(self.request)
if Person.objects.filter(user=user).exists():
self.add_error('name', "You already submitted data")
return self.cleaned_data
def save(self, commit=True):
...