从多对多字段获取对象 [英] Get objects from a many to many field

问题描述

我有一个名为admins"的 m2m 字段.在模型内部，我需要从视图中获取该字段中所有选定的条目，即用户 ID.然后使用用户 ID 获取每个用户的电子邮件.可能吗?

I have an m2m field called "admins" inside a model and I need to obtain from a view all the selected entries in that field, which are user IDs. Then with the user IDs obtain the emails for every user. Is it possible?

我想要做的确切事情是向该平台内某个空间的所有管理员发送群发电子邮件.

The exact thing I want to do is to send a mass email to all the admins of a space inside this platform.

空间模型:

class Space(models.Model):

    """     
    Spaces model. This model stores a "space" or "place" also known as a
    participative process in reality. Every place has a minimum set of
    settings for customization.

    There are three main permission roles in every space: administrator
    (admins), moderators (mods) and regular users (users).
    """
    name = models.CharField(_('Name'), max_length=250, unique=True,
        help_text=_('Max: 250 characters'))
    url = models.CharField(_('URL'), max_length=100, unique=True,
        validators=[RegexValidator(regex='^[a-z0-9_]+$',
        message='Invalid characters in the space URL.')],
        help_text=_('Valid characters are lowercase, digits and 
    admins = models.ManyToManyField(User, related_name="space_admins", verbose_name=_('Administrators'), help_text=_('Please select the 
        users that will be administrators of this space'), blank=True,
        null=True)
    mods = models.ManyToManyField(User, related_name="space_mods",
        verbose_name=_('Moderators'), help_text=_('Please select the users 
        that will be moderators of this space.'), blank=True, null=True)
    users = models.ManyToManyField(User, related_name="space_users", verbose_name=_('Users'), help_text=_('Please select the users that 
        can participate on this space'), blank=True, null=True)

查看仅发送一封电子邮件:

View for sending just one email:

@login_required
def add_intent(request, space_url):

    """
    Returns a page where the logged in user can click on a "I want to
    participate" button, which after sends an email to the administrator of
    the space with a link to approve the user to use the space.
    
    :attributes:  space, intent, token
    :rtype: Multiple entity objects.
    :context: space_url, heading
    """
    space = get_object_or_404(Space, url=space_url)
    #admins = space.admins??

    try:
        intent = Intent.objects.get(user=request.user, space=space)
        heading = _("Access has been already authorized")
        
    except Intent.DoesNotExist:
        token = hashlib.md5("%s%s%s" % (request.user, space,
                            datetime.datetime.now())).hexdigest()
        intent = Intent(user=request.user, space=space, token=token)
        intent.save()
        subject = _("New participation request")
        body = _("User {0} wants to participate in space {1}.
 
                 Please click on the link below to approve.
 {2}"
                 .format(request.user.username, space.name,
                 intent.get_approve_url()))
        heading = _("Your request is being processed.")
        send_mail(subject=subject, message=body,
                  from_email="[e-mail]",
                  recipient_list=[space.author.email])

        # Send a notification to all the admins in that space
        #send_mass_mail()

    return render_to_response('space_intent.html', 
            {'space_name': space.name, 'heading': heading}, 
            context_instance=RequestContext(request))

推荐答案

您可以使用:

space.related.all()

返回一个用户查询集

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