Django的 - 通过多对多额外字段访问模板

Question

我有以下型号结构：

class Project(models.Model): 
    title  = models.CharField(max_length = 100) 
    publish  = models.BooleanField() 
    cover  = models.ForeignKey(GenericMedia, related_name='+') 
    media  = models.ManyToManyField(GenericMedia, through='AssocProjectMedia') 
    credits  = models.ManyToManyField(AssocTitleName) 

class GenericMedia(models.Model): 
    limit   = models.Q(model = 'Image') | models.Q(model = 'Other') 
    content_type = models.ForeignKey(ContentType, limit_choices_to = limit) 
    object_id  = models.PositiveIntegerField() 
    content_object = generic.GenericForeignKey('content_type', 'object_id') 

    def __unicode__(self): 
     return u"%s" % os.path.basename(self.content_object.url.name) 

    def instance(self): 
     return self.content_object.__class__.__name__ 


class AssocProjectMedia(models.Model): 
    project  = models.ForeignKey(Project) 
    media  = models.ForeignKey(GenericMedia) 

    position = models.PositiveSmallIntegerField() 
    grid_size = models.PositiveSmallIntegerField(null = True, blank = True) 

    class Meta: 
     ordering = ['position'] 

我一直在尝试了一段时间，以获得位置数据（包括AssocProjectMedia）我用下面的模板：

project = get_object_or_404(Project, slug=project_slug) 
    return render(request, 'projects/projects_details.html', {"project":project}) 

在我的模板

：

在我看来

但是这不起作用，没有出现。

如果不是我写的：

{% for media in project.media.all %} 
... 
{% endfor %} 

我会得到我的媒体数据，但在通过模型（AssocProjectMedia）不包含一个。

如果任何人有如何做到这一点......一个想法

Answer 1

试试这个：

{% for assoc_media in project.assocprojectmedia_set.all %} 
    {{assoc_media.position}} 
    {# or whatever field #} 
{% endfor %}