Question

我需要根据其他字段的值排除字段。他们之间的关系如下。

class Moo: 
   ...

class Too:
        moo = models.ForeignKey(Moo, related_name='moo_too')

        ...

class PooToo:
       moo = models.ForeignKey(Moo) 
       stature = models.PositiveSmallIntegerField(..)
       ...

class PooMooResource(ModelResource):

    moo = ToOneField(StandAloneMooResource, 'moo', full=True)
    class Meta:
        list_allowed_methods = ['get']
        queryset = PooMoo.objects.select_related('moo').all()

class StandAloneMooResource(ModelResource):

    too = ToManyField(TooResource,...)
    class Meta:
            queryset = Moo.objects.all()

现在我想在too时公开API中的stature==0字段，否则不公开。我可以使用use_in来解决此问题，但问题是stature

中我没有StandAloneMooResource的值

Answer 1

尝试这样的事情：

class StandAloneMooResource(ModelResource):

    too = ToManyField(TooResource,...)
    class Meta:
        queryset = Moo.objects.all()

    def dehydrate_too(self, bundle):
        # if this method is run while dehdyrating PooMooResource.moo,
        # related_obj should be the related PooMoo
        if bundle.related_obj and bundle.related_obj.stature != 0:
            return None
        return bundle.data['too']

不幸的是，＆＃39;以及＆＃39; key仍然存在，而tastypie仍将继续从数据库中检索教程。

这可能会更好：

def foo(bundle):
    if bundle.related_obj and bundle.related_obj.stature != 0:
        return None
    return bundle.obj.tutorials.all()

class StandAloneMooResource(ModelResource):

    too = ToManyField(TooResource, attribute=foo)
    class Meta:
        queryset = Moo.objects.all()

    def dehydrate(self, bundle):
        # to remove the 'tutorials' key
        if 'too' in bundle.data and not bundle.data['too']:
            del bundle.data['too']
        return bundle

如果bundle.related_obj无法正常工作：

def foo(bundle):
    poomoo = None
    try:
        # assumes PooMoo.user a relation to User
        poomoo = PooMoo.objects.filter(moo=bundle.obj, user=bundle.request.user)[0]
    except IndexError:
        pass
    if poomoo and poomoo.stature != 0:
        return None
    return bundle.obj.too.all()

Answer 2

您可以执行以下操作：

.container > div {
  /* block properties become available, but only takes the designated width */
  display: inline-block;
  /* this tells it to include padding & borders when calculating width */
  box-sizing: border-box;
  width: 30%;
  padding: 15px;
  /* min / max width ensure it's always within a "reasonable" width window.  
  This means at responsive it can / will reduce to 2 side-by-side, 
  and at larger sizes would increase to 3 or 4 side-by-side */
  max-width: 250px;
  min-width: 200px;
}

.container > div img {
  /* ensure the image takes the full width of the space */
  width: 100%;
  /* this ensures the image is always proportioned properly */
  height: auto;
}

.container div.text {
  /* this is the weakness of this layout.  To get all the boxes to be the same height, you have to set this to a fixed height. */
  height: 200px;
}

您可以查看http://django-tastypie.readthedocs.org/en/latest/resources.html

从tastypie api中排除一个字段

2 个答案: