IntegrityError at /project/new/

Question

我正在尝试为我的 django 应用程序创建一个项目创建部分，但我收到此错误：

IntegrityError at /project/new/
NOT NULL constraint failed: project_project.author_id

这是我的观点：

view.py

def project_new(request):
if request.method == 'POST':
form = ProjectForm(request.POST)
if form.is_valid():
project = form.save()
project.author = request.user
project.published_date = timezone.now()
project.save()
return redirect('blog/project_detail.html', pk=project.pk)
else:
form = ProjectForm()
return render(request, 'blog/project_new.html', {'form': form})

这是我的模型models.py

class Project(models.Model):
author = models.ForeignKey('auth.User', on_delete=models.CASCADE)
title = models.CharField(max_length=200)
text = RichTextField()
created_date = models.DateTimeField(
default=timezone.now)
published_date = models.DateTimeField(
blank=True, null=True)
def publish(self):
self.published_date = timezone.now()
self.save()
def __str__(self):
return self.title

这是我的表单文件forms.py

class ProjectForm(forms.ModelForm):
first_name = forms.CharField(max_length=30, required=True, help_text='Required.')
last_name = forms.CharField(max_length=30, required=True, help_text='Required.')
email = forms.EmailField(max_length=254, help_text='Required. Inform a valid email address.')
project_name = forms.CharField(max_length=30, required=True, help_text='Required')
project_description = forms.CharField(max_length=10000, required=True, help_text='Required.')
project_notes = forms.CharField(max_length=1000, required=False, help_text='Optional.')
class Meta:
model = Project
fields = ('first_name', 'last_name', 'email', 'project_name',
'project_description', 'project_notes')

这是 mt html 文件。我不确定，但在这一部分中，我无法确定"按钮"代码。我可能错了project_detail.html

<form method="POST" style="text-align: center" >
{% csrf_token %}
<input type='hidden' value='m3KqcAqxJtXsJLS8ZRfhlXvTiXc1G0K0Whojb71JSe4jDsHYPwuOWKPIlFELyGoQ'/>
<p>
<label for="id_first_name">name</label><br>
<input type="text" name="first_name" required id="id_first_name" maxlength="30"/>
</p>
<p>
<label for="id_last_name">last name:</label><br>
<input type="text" name="last_name" required id="id_last_name" maxlength="30"/>
</p>
<p>
<label for="id_email">Email:</label><br>
<input type="email" name="email" required id="id_email" maxlength="254"/>
</p>
<p>
<label for="id_project_name">Project name:</label><br>
<input type="text" name="project_name" required id="id_project_name" maxlength="30"/>
</p>
<p>
<label for="id_project_description">Project description:</label><br>
<input type="text" name="project_description" required id="id_project_description" maxlength="10000"/>
</p>
<p>
<label for="id_project_notes">Proje notes:</label><br>
<input type="text" name="project_notes" id="id_project_notes" maxlength="1000"/>
</p>
<button style="color: #9C1A1C; font-weight: bold" type="submit" class="save btn btn-default">Save</button>
</form>

我的错误在哪里？

Answer 1

您的表单ProjectForm应该是forms.ModelForm的子类，而不是forms.Form

class ProjectForm(forms.ModelForm):
first_name = forms.CharField(max_length=30, required=True, help_text='Required.')
last_name = forms.CharField(max_length=30, required=True, help_text='Required.')
email = forms.EmailField(max_length=254, help_text='Required. Inform a valid email address.')
project_name = forms.CharField(max_length=30, required=True, help_text='Required')
project_description = forms.CharField(max_length=10000, required=True, help_text='Required.')
project_notes = forms.CharField(max_length=1000, required=False, help_text='Optional.')
class Meta:
model = Project
fields = ('first_name', 'last_name', 'email', 'project_name',
'project_description', 'project_notes')

更新

要添加不可为空的ForeignKeyauthor，您应该在将更改提交到数据库之前添加作者对象。

def project_new(request):
if request.method == 'POST':
form = ProjectForm(request.POST)
if form.is_valid():
project = form.save(commit=False)
project.author = request.user
project.published_date = timezone.now()
project.save()
return redirect('blog/project_detail.html', pk=project.pk)