来自mongo shell和nodejs应用程序的2个不同的输出
我在mongo shell中获取不同的输出结果，同时从nodejs应用程序获得响应。
请注意，我是mongoose作为mongodb的nodejs驱动程序
代码如下。
_id:ObjectId("55eab3cb358c513439c3ce5d") building_id:"55eab32b358c513439c3ce5c"; flat_tenants:[{ "_id": { "tenant_id": "", "agreement_start_date": null, "agreement_end_date": null, "rent_amt": 10000, "rent_cycle": 7, "advance_proof": null, "id_proof": null, "other_terms": null, "is_active": "false", "_id": "55eac5db5e1ddb87104a7865", "rent": [] } }, { "_id": { "tenant_id": "geo@g.org", "agreement_start_date": null, "agreement_end_date": null, "rent_amt": 10000, "rent_cycle": 7, "advance_proof": null, "id_proof": null, "other_terms": null, "is_active": "true", "_id": "55eac6065e1ddb87104a7866", "rent": [] } }, { "_id": { "tenant_id": "geo2@g.org", "agreement_start_date": null, "agreement_end_date": null, "rent_amt": 10000, "rent_cycle": 7, "advance_proof": null, "id_proof": null, "other_terms": null, "is_active": "false", "_id": "55ead263232fe9585a86bb7f", "rent": [] } }, { "_id": { "tenant_id": "geo3@g.org", "agreement_start_date": null, "agreement_end_date": null, "rent_amt": 10000, "rent_cycle": 7, "advance_proof": null, "id_proof": null, "other_terms": null, "is_active": "true", "_id": "55eb434f1d844381555c41c0", "rent": [] } } ] } mongo shell的输出：
"1" : { "tenant_id" : "geo2@g.org", "agreement_start_date" : null, "agreement_end_date" : null, "rent_amt" : 10000, "rent_cycle" : 7, "advance_proof" : null, "id_proof" : null, "other_terms" : null, "is_active" : "false", "_id" : ObjectId("55ead263232fe9585a86bb7f"), "rent" : [ ] }
通过nodejs app输出：
{ "_id": { "tenant_id": "", "agreement_start_date": null, "agreement_end_date": null, "rent_amt": 10000, "rent_cycle": 7, "advance_proof": null, "id_proof": null, "other_terms": null, "is_active": "false", "_id": "55eac5db5e1ddb87104a7865", "rent": [] } }, { "_id": { "tenant_id": "geo@g.org", "agreement_start_date": null, "agreement_end_date": null, "rent_amt": 10000, "rent_cycle": 7, "advance_proof": null, "id_proof": null, "other_terms": null, "is_active": "true", "_id": "55eac6065e1ddb87104a7866", "rent": [] } }, { "_id": { "tenant_id": "geo2@g.org", "agreement_start_date": null, "agreement_end_date": null, "rent_amt": 10000, "rent_cycle": 7, "advance_proof": null, "id_proof": null, "other_terms": null, "is_active": "false", "_id": "55ead263232fe9585a86bb7f", "rent": [] } }, { "_id": { "tenant_id": "geo3@g.org", "agreement_start_date": null, "agreement_end_date": null, "rent_amt": 10000, "rent_cycle": 7, "advance_proof": null, "id_proof": null, "other_terms": null, "is_active": "true", "_id": "55eb434f1d844381555c41c0", "rent": [] } }
mongodb代码：
flats.aggregate({$match:{building_id: "55eab32b358c513439c3ce5c", _id:ObjectId("55eab3cb358c513439c3ce5d")}}, {$unwind:"$flat_tenant"}, {$match:{"flat_tenant._id": ObjectId("55eac5db5e1ddb87104a7865") }}, { $project: { _id: 0, _id: "$flat_tenant" } } ).exec(function(err, tenantDetails1) {
有人可以帮我弄清楚为什么我得到这个问题。