1

我有一个带有 ManyToManyField 的模型到另一个模型。我想获取 JSON 返回的特定记录的所有信息(包括来自其他模型的相关信息)。

如何让 django-piston 显示这些值?我会很高兴只使用主键。或者你能建议另一种选择吗?

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3 回答 3

2

我可能是错的,但这应该这样做:

class PersonHandler(BaseHandler):
    model = Person
    fields = ('id', ('friends', ('id', 'name')), 'name')

    def read(self, request):
        return Person.objects.filter(...)
于 2010-06-15T22:48:14.337 回答
1

您需要在返回多对多数据的处理程序上定义一个类方法,我不相信活塞会自动执行此操作。

class MyHandler(BaseHandler):
    model = MyModel
    fields = ('myfield', 'mymanytomanyfield')

    @classmethod
    def mymanytomanyfield(cls, myinstance):
        return myinstance.mymanytomanyfield.all()
于 2010-06-16T06:30:12.543 回答
0

我的代码:

楷模:

class Tag(models.Model):
"""docstring for Tags"""
tag_name = models.CharField(max_length=20, blank=True)
create_time = models.DateTimeField(auto_now_add=True)

def __unicode__(self):
    return self.tag_name
class Author(models.Model):
"""docstring for Author"""
name = models.CharField(max_length=30)
email = models.EmailField(blank=True)
website = models.URLField(blank=True)

def __unicode__(self):
    return u'%s' % (self.name)

class Blog(models.Model):
"""docstring for Blogs"""
caption = models.CharField(max_length=50)
author = models.ForeignKey(Author)
tags = models.ManyToManyField(Tag, blank=True)
content = models.TextField()
publish_time = models.DateTimeField(auto_now_add=True)
update_time = models.DateTimeField(auto_now=True)

def __unicode__(self):
    return u'%s %s %s' % (self.caption, self.author, self.publish_time)

处理:

class BlogAndTagsHandler(BaseHandler):
allowed_methods = ('GET',)
model = Blog
fields = ('id' 'caption', 'author',('tags',('id', 'tag_name')), 'content', 'publish_time', 'update_time')

def read(self, request, _id=None):
    """
    Returns a single post if `blogpost_id` is given,
    otherwise a subset.

    """
    base = Blog.objects

    if _id:
        return base.get(id=_id)
    else:
        return base.all() # Or base.filter(...)

效果不错。

于 2013-01-02T13:31:50.967 回答