从列表中选择用户并添加到发布请求 [英] Select users from list and add to post request

问题描述

我有一个用户列表，所有用户旁边都有一个复选框。所有选定的用户都应添加到数组中，然后通过Django发布请求发送到数据库。

I have a list of users that all have a checkbox next to them. All the users that are selected should be added to the array and then sent to the database via the Django post request.

以下是该图片：

底部的按钮是提交按钮。

The Button at the bottom is the submit button.

模型：

class UserProfile(models.Model):
    user = models.ForeignKey(User, on_delete=models.CASCADE)
    color = models.CharField(max_length=25, default="", blank=True)

class Studyplan(models.Model):
    name = models.CharField(max_length=100, null=True)
    description = models.CharField(max_length=1000, null=True)
    parent_assignment = models.ForeignKey(Assignment, blank=True, on_delete=models.CASCADE,related_name="studyplan", null=True)
    deadline = models.DateField(default=date.today, null=True)
    students = models.ManyToManyField(UserProfile, blank=True, related_name="studyplan_students", null=True)
    teachers = models.ManyToManyField(UserProfile, blank=True, related_name="studyplan_teachers", null=True)
    canview = models.ManyToManyField(UserProfile, blank=True, related_name="studyplan_canview", null=True)
    notes = models.ManyToManyField(Note, blank=True, related_name="studyplan", null=True)
    tasks = models.ManyToManyField(Task, blank=True, related_name="studyplan", null=True)
    messages = models.ManyToManyField(Message, blank=True, related_name="studyplan", null=True)

视图：

@login_required
def skapa_studieplan(request):
    if request.method == 'POST':

        name = request.POST.get('Studyplan-Name')
        description = request.POST.get('Studyplan-Description') 
        parent_assignment = Assignment.objects.get(pk=request.POST.get('Studyplan-PAID'))
        users = UserProfile.objects.all()
        instance = Studyplan.objects.create(request.POST.get('Studyplan-Canview'))
        for user in users:
            instance.canview.add(user)

        studyplan = Studyplan(name=name, description=description, parent_assignment=parent_assignment, canview=instance)
        studyplan.save()

        return redirect('allaStudieplaner')

我的问题是我无法弄清楚将ManyToManyField中的值放入POST请求中。

My problem is that I can't figure out to get the values from a ManyToManyField into a POST request.

我得到一个类似的错误：禁止直接分配给多对多集的正向。请使用emails_for_help.set（）代替

I get an error similar to this: Direct assignment to the forward side of a many-to-many set is prohibited. Use emails_for_help.set() instead

选择模式：

{% for elev in elever %}
                        <div class="custom-control custom-checkbox">

                            <span class="d-flex align-items-center">


                                <div style="margin-right: 10px">
                                    <div class="circle" style="background-color: {{ elev.color }}">
                                        <span class="initials" , style="color: #ffffff"> {{ elev.user|capfirst|first }}
                                        </span>
                                      </div>
                                </div>

                              <div style="width: 300px">

                                <span class="h6 mb-0" data-filter-by="text">{{elev.user|capfirst}}</span>
                              </div>
                              <div class="checkboxx"> <input type="checkbox" name="Studyplan-Canview" value= "{{ student.name }}">
                                <style>
                                .checkerName {
                                  margin-left: 10px
                                }

                                .checkboxx {
                                  align-content: flex-end;
                                  margin-left: 300px
                                }
                                </style> </div>

                            </span>
                          </label>
                        </div>
                        {% endfor %}

整个HTML：

The Whole HTML:

推荐答案

假设您的 request.POST 包含键 canview 的用户名列表，您将获得如下用户名列表： usernames = request .POST.getlist（'canview'）。

Assuming your request.POST contains a list of usernames for the key canview, you'll get a list of the user name like this: usernames = request.POST.getlist('canview').

现在，使用用户名列表，您需要获取相应的用户并分配这些用户使用 set（）：

Now, with the list of usernames, you need to fetch the corresponding users and assign these to your M2M field using set():

usernames = request.POST.getlist('canview')
users = User.objects.filter(username__in=usernames)
studyplan = Studyplan(name=name, description=description, parent_assignment=parent_assignment)
studyplan.save()  # you need a saved item to be able to create the M2M relationship
studyplan.canview.set(users)

这篇关于从列表中选择用户并添加到发布请求的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！