Question

我有两个ModelForms从单个视图提交。一个模型是另一个模型的ForeignKey。此时，表单将添加到DB，但不是预期的。我没有添加课程和部分（课程字段填充了新创建的课程），而是获得了一个链接的课程和部分，但是部分名称作为课程名称和部分名称。

models.py

class Course(models.Model):
    Name = models.CharField(max_length=30,unique=True)
    Active = models.BooleanField(default=True)

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

class Section(models.Model):
    Name = models.CharField(max_length=30,default='.',unique=True)
    course = models.ForeignKey(Course, on_delete=models.CASCADE)
    assessments = models.ManyToManyField(Assessment)

    def __unicode__(self):
        return u'%s / %s' % (self.Name, self.course)

forms.py

class CourseAddForm(forms.ModelForm):
    class Meta:
        model = Course
        fields = ['Name', 'Active']
class SectionAddForm(forms.ModelForm):
    class Meta:
        model = Section
        fields = ['Name']

模板/ index.html中

<!-- COURSE ADD MODAL -->
<div class="modal fade" id="CourseAddModal" role="dialog">
<div class="modal-dialog">

  <!-- Modal content-->
  <div class="modal-content">
    <div class="modal-header" style="padding:5px 10px;">
      <button type="button" class="close" data-dismiss="modal">&times;</button>
      <h4>Add Course</h4>
    </div>
    <div class="modal-body" style="padding:10px 10px;">
      <form data-parsley-validate method="post" id="coursesecaddform" action="" enctype="multipart/form-data"
                data-parsley-trigger="focusout">

        {% csrf_token %}
        Add course
        {{ courseaddform.as_p }}
        Add section
        {{ sectionaddform.as_p }}

        <p id="login-error"></p>

        <input type="submit" class="btn btn-info submit" name="AddCourse" value="Add Course" />
      </form>
    </div>
    <div class="modal-footer">
    </div>
  </div>

</div>
</div>

views.py

def IndexView(request,Course_id,Section_id):
    if request.method == "GET":

        this_course = Course.objects.get(pk=Course_id)
        active_courses = Course.objects.all().filter(Active=True).exclude(pk=Course_id)
        section_list = Section.objects.all().filter(course=this_course)
        if len(section_list) >1:
            multi_section = True
        else:
            multi_section = False
        active_section = Section.objects.get(pk=Section_id)
        roster = Student.objects.all().filter(sections__in=[active_section])
        announcement_list = Announcement.objects.all().filter(sections__in=[active_section])
        courseaddform = CourseAddForm()
        sectionaddform = SectionAddForm()

        context = {'active_courses':active_courses, 'this_course': this_course,
                   'active_section':active_section, 'section_list':section_list,
                   'roster':roster, 'multi_section':multi_section,
                   'announcement_list':announcement_list, 'courseaddform':courseaddform,
                   'sectionaddform':sectionaddform}
        return render(request,'gbook/index.html', context)
    elif request.method == "POST":
        this_course = Course.objects.get(pk=Course_id)
        active_courses = Course.objects.all().filter(Active=True).exclude(pk=Course_id)
        section_list = Section.objects.all().filter(course=this_course)
        if len(section_list) >1:
            multi_section = True
        else:
            multi_section = False
        active_section = Section.objects.get(pk=Section_id)

        f = CourseAddForm(request.POST, instance=Course())
        g = SectionAddForm(request.POST, instance=Section())
        if f.is_valid() and g.is_valid():
            new_course = f.save()
            new_section = g.save(commit=False)
            new_section.course = new_course
            print new_section.course
            new_section.save()

        return redirect("/gbook/"+str(Course_id)+"/"+str(active_section))

Answer 1

解决方案：

使用numpy.random.randn()：

，而不是使用instance参数

prefix

Answer 2

两个模型都有一个def IndexView(request,Course_id,Section_id): if request.method == "GET": this_course = Course.objects.get(pk=Course_id) active_courses = Course.objects.all().filter(Active=True).exclude(pk=Course_id) section_list = Section.objects.all().filter(course=this_course) if len(section_list) >1: multi_section = True else: multi_section = False active_section = Section.objects.get(pk=Section_id) roster = Student.objects.all().filter(sections__in=[active_section]) announcement_list = Announcement.objects.all().filter(sections__in=[active_section]) courseaddform = CourseAddForm(prefix='crs') sectionaddform = SectionAddForm(prefix='sctn') context = {'active_courses':active_courses, 'this_course': this_course, 'active_section':active_section, 'section_list':section_list, 'roster':roster, 'multi_section':multi_section, 'announcement_list':announcement_list, 'courseaddform':courseaddform, 'sectionaddform':sectionaddform} return render(request,'gbook/index.html', context) elif request.method == "POST": this_course = Course.objects.get(pk=Course_id) active_courses = Course.objects.all().filter(Active=True).exclude(pk=Course_id) section_list = Section.objects.all().filter(course=this_course) if len(section_list) >1: multi_section = True else: multi_section = False active_section = Section.objects.get(pk=Section_id) f = CourseAddForm(request.POST, prefix='crs') g = SectionAddForm(request.POST, prefix='sctn') if f.is_valid() and g.is_valid(): new_course = f.save() new_section = g.save(commit=False) new_section.course = new_course print new_section.course new_section.save() return redirect("/gbook/"+str(Course_id)+"/"+str(active_section))字段，因此两个表单都包含一个具有相同Name属性的输入。当Django遇到两个具有相同名称的POST参数时，它会将最后一个值绑定到该名称的所有字段。长话短说 - 改变模型中的字段名称，使它们不同。

Answer 3

由于您的Course和Section都有一个名为Name的属性，我打赌您的表单包含两个属性为id = "id_Name"和name = "Name"的字段

使用单一视图提交的多个表单 - Django

3 个答案: