python - 无法查询 ListField(EmbeddedDocumentField)

Question

我有以下模型

class Skill(EmbeddedDocument):
   name =  StringField(required = True)
   level = IntField(required = True)

class Agent(Document):
   name = StringField(required = True)
   email = EmailField(required = True, unique = True)
   skills = ListField(EmbeddedDocumentField(Skill))

我想搜索具有(name = "computer skills and level >5)技能的特工

我写了以下查询:

 Agent.objects.filter(name='ashraf',  skills__level__gt=5,skills__name="Computer Skills")

如果 Agent 的技能名为“Computer skills”且级别为 3，并且还具有名为“English skills”的技能且级别为 10，则此 Agent 将出现在查询结果中

Answer 1

您需要执行一个 $elemMatch[1] 查询，目前 mongoengine 中没有内置支持。您必须像这样进行原始查询:

Agent.objects.filter(
    name='ashraf',  
    __raw__={"skills": {
        "$elemMatch": {
            "level": {"$gt": 5}, 
            "name": "Computer Skills"
        }
    }}
)

[1] http://www.mongodb.org/display/DOCS/Advanced+Queries#AdvancedQueries-%24elemMatch