我需要从Document Lesson获取所有类型为Subject的EmbeddedDocuments,其中Subject.subject_name =' Something'。 我正在努力做以下事情并且它不适合我:
class Subject(EmbeddedDocument):
subject_code = IntField()
subject_name = StringField(max_length=60)
hours = IntField(required=False)
def __unicode__(self):
return smart_unicode(self.subject_name)
class Lesson(Document):
subject = EmbeddedDocumentField(Subject)
teacher = EmbeddedDocumentField(Teacher)
group = EmbeddedDocumentField(Group)
room = EmbeddedDocumentField(Room)
attendance = IntField()
def __unicode__(self):
return smart_unicode(self.id)
我的模特:
{{1}}
提前谢谢大家! 祝你今天愉快! :)
答案 0 :(得分:0)
考虑到以下链接https://mongoengine-odm.readthedocs.org/guide/querying.html,很明显,原始功能可以解决任务:
可以提供原始PyMongo查询作为查询参数,该查询将直接集成到查询中。这是使用原始关键字参数完成的:
results = Lesson.objects(__raw__={'subject.subject_name': 'Math'})