折腾：
【未解决】Django的Serializer中如何序列化Script中的Author的Function Group
期间，想要去查询FunctionGroup中的字段members：
class FunctionGroup(TimestampedModel): members = models.ManyToManyField(User)
用代码：
joinedScriptGroup = FunctionGroup.objects.get(members__contains=curUser, function=FunctionGroup.TYPE_VALUE_SCRIPT)
其中curUser是当前的User的对象
结果出错：
File "/Users/crifan/dev/dev_root/company/xxx/projects/xxx/server/xxx/apps/script/serializers.py", line 30, in to_representation
joinedScriptGroup = FunctionGroup.objects.get(members__contains=curUser, function=FunctionGroup.TYPE_VALUE_SCRIPT)
File "/usr/local/lib/python3.6/site-packages/django/db/models/manager.py", line 82, in manager_method
return getattr(self.get_queryset(), name)(*args, **kwargs)
File "/usr/local/lib/python3.6/site-packages/django/db/models/query.py", line 394, in get
clone = self.filter(*args, **kwargs)
File "/usr/local/lib/python3.6/site-packages/django/db/models/query.py", line 836, in filter
return self._filter_or_exclude(False, *args, **kwargs)
File "/usr/local/lib/python3.6/site-packages/django/db/models/query.py", line 854, in _filter_or_exclude
clone.query.add_q(Q(*args, **kwargs))
File "/usr/local/lib/python3.6/site-packages/django/db/models/sql/query.py", line 1253, in add_q
clause, _ = self._add_q(q_object, self.used_aliases)
File "/usr/local/lib/python3.6/site-packages/django/db/models/sql/query.py", line 1277, in _add_q
split_subq=split_subq,
File "/usr/local/lib/python3.6/site-packages/django/db/models/sql/query.py", line 1215, in build_filter
condition = self.build_lookup(lookups, col, value)
File "/usr/local/lib/python3.6/site-packages/django/db/models/sql/query.py", line 1076, in build_lookup
raise FieldError('Related Field got invalid lookup: {}'.format(lookup_name))
django.core.exceptions.FieldError: Related Field got invalid lookup: contains搜：
django.core.exceptions.FieldError: Related Field got invalid lookup: contains
想起来了，其中双下划线__是可以用来获取字段的
所以试了试：
joinedScriptGroup = FunctionGroup.objects.get(members__id=curUser.id, function=FunctionGroup.TYPE_VALUE_SCRIPT)
然后可以了，可以查询到
FunctionGroup中多个User类型的members中，其中某个member的id是curUser.id
的对象了。
前端返回了：
注：
更多查询的用法参见官网：
转载请注明：在路上 » 【已解决】Django中查询model中字段是数组对象出错：django.core.exceptions.FieldError: Related Field got invalid lookup: contains