我有以下这些Django模型:
class Group(models.Model):
name = models.CharField(max_length=100)
parent_group = models.ManyToManyField("self", blank=True)
def __unicode__(self):
return self.name
class Block(models.Model):
name = models.CharField(max_length=100)
app = models.CharField(max_length=100)
group = models.ForeignKey(Group)
def __unicode__(self):
return self.name
设想区块 b1 拥有 g1 组。通过名称,我想从组 g1 获取 所有区块 。 我编写了这个递归函数:
def get_blocks(group):
def get_needed_blocks(group):
for block in group.block_set:
blocks.append(block)
if group.parent_group is not None:
get_needed_blocks(group.parent_group)
blocks = []
get_needed_blocks(group)
return blocks
但是 b1.group.block_set 返回的是一个RelatedManager对象,它不可迭代。
我做错了什么,如何修复?