如何使用 Django 管理内联表单自动邀请所选组的所有用户？

Question

我正在开发一个应用程序，目前我有
1) Staff模型通过OneToOne关系连接到User模型，可以有多个Group.
2) 会议模型也可以分配到多个组。
3) RSVPinline 是 MeetingAdmin 的一部分作为内联表格。

在这里，我试图在创建会议时自动添加在 Django 管理表单中的选定组中关联的所有“员工”。

我已尝试 save_model 在会议的“创建者”字段中添加当前用户。

models.py

class Group(models.Model):
    name = models.CharField(max_length=200)

class Staff(models.Model):
    fullname = models.CharField(max_length = 250,verbose_name = "First Name")
    group = models.ManyToManyField(Group, blank=False,verbose_name = "Meeting Group")  # protect error left to add
    is_active = models.BooleanField(default=True)
    user = models.OneToOneField(User, on_delete=models.CASCADE,null=True, blank=True,verbose_name = "Associated as User")  # protect error left to add
    left_date = models.DateField(null=True, blank=True,verbose_name = "Resigned Date")

class Meeting(models.Model):
    title = models.CharField(_('Title'), blank=True, max_length=200)
    start = models.DateTimeField(_('Start'))
    group = models.ManyToManyField(Group, blank=False,verbose_name = "Meeting Group")  # protect error left to add
    location = models.ForeignKey(Location, blank=False,verbose_name = "Location",on_delete=models.CASCADE)  # protect error left to add

class RSVP(models.Model):
    meeting = models.ForeignKey(Meeting, on_delete=models.CASCADE)
    responder =  models.ForeignKey(User, editable=True, on_delete=models.CASCADE, null=True, blank=True,verbose_name = "Attendees", related_name='guest')
    response = models.CharField(max_length = 20, choices= MEETING_RSVP, default='No response', verbose_name = "Status",null=True, blank=True)

admin.py

class RSVPInline(admin.TabularInline):
    model = RSVP
    extra = 0


class MeetingAdmin(admin.ModelAdmin):
    form = MeetingForm
    list_display = ('title', 'location', 'start','creator' )
    inlines = [RSVPInline, TaskInline]

    #Currently using save_model to automatically add current user as a creator
    def save_model(self, request, obj, form, change):
        obj.creator = request.user
        super().save_model(request, obj, form, change)

我的伪代码是：

grouplist = Get group's list from submitted MeetingForm
stafflist = Staff.objects.filter(department__in =grouplist).values_list('id', flat=True).distinct()
Add to RSVPInline:
    values = list(for staff in stafflist:
              'responder' = staff
              'meeting' = 'meeting from  MeetingForm' 
              'response' = has a default value in model

    bulk_create() RSVPInline with values

Answer 1

您可以扩展 save_related() ModelAdmin 方法以 在表单对象 (Meeting) 之后执行其他操作及其内联（RSVPs，如果存在于提交的表单中）被保存:

class MeetingAdmin(admin.ModelAdmin):
    ...

    def save_related(self, request, form, formsets, change):
        # call original method - saves Meeting and inlines
        super(MeetingAdmin, self).save_related(request, form, formsets, change)
        # get this form Meeting
        obj = form.instance
        # get Staff members of this meeting groups
        # and we can exclude ones already having
        # RSVP for this meeting
        stafflist = Staff.objects.filter(
            group__in=obj.group.all()
        ).exclude(
            user__guest__meeting=obj
        )
        rsvps = list(
            RSVP(responder=staff.user, meeting=obj)
            for staff in stafflist
        )
        # calls bulk_create() under the hood
        obj.rsvp_set.add(*rsvps, bulk=False)

** 一些可能有用的注释：

group 字段称为 groups 可能更好，因为它表示多对多关系和 returns 多个对象
related_name 表示 relation from the related object back to this one 因此使用 invites 之类的东西而不是 guest

如何使用 Django 管理内联表单自动邀请所选组的所有用户？

How to Auto Invite all users of selected Group using Django admin inlines form?

forms

django

admin

django-admin

inlines