这是我在json中的mongo集合:"messages":{"_id":ObjectId("5c26844696b72e4b6c9ceee7"),"pointer":ObjectId("5c26844696b72e4b6c9ceee6"),"messages":[{"uuid":"f03f7977-0b4e-11e9-9f95-144fd7c03810","content":"Hello","reportedTimes":0},{"uuid":"78bb831d-0b57-11e9-a286-144fd7c03810","content":"Yes","reportedTimes":0

这是我在json中的mongo集合:"messages":{"_id":ObjectId("5c26844696b72e4b6c9ceee7"),"pointer":ObjectId("5c26844696b72e4b6c9ceee6"),"messages":[{"uuid":"f03f7977-0b4e-11e9-9f95-144fd7c03810","content":"Hello","reportedTimes":0},{"uuid":"78bb831d-0b57-11e9-a286-144fd7c03810","content":"Yes","reportedTimes":0