我正在使用mongo-join连接node.js中的两个集合。下面的代码显示了查询但它没有加入两个集合。有人请帮助我。
var client = new Db(config.dbname, new Server(config.host, config.port1));
client.open(function(err, client) {
client.collection('proInfo', function(err, proInfo) {
proInfo.find({}, function(err, cursor) {
var join = new Join(client).on({
field: '_id', // <- field in proInfo doc
to: 'purchasedItemId',// <- field in purchased doc. treated as ObjectID automatically.
from: 'purchased' // <- collection name for purchased doc
});
join.toArray(cursor, function(err, joinedDocs) {
// handle array of joined documents here
console.log(joinedDocs);
});
});
});
});
两个集合，
{
"_id"▼: ObjectId("573337d73e102e40365bb5db"),
"Product_Name": "KRISONS BLUETOOTH 5.1 MULTIMEDIA SPEAKER HOME THEATER SYSTEM",
"Brand": "Krisons",
"Color": "",
"Image": "http://ecx.images-amazon.com/images/I/41H6cuSsemL._SY300_QL70_.jpg",
"Price": "2,690.00",
"Rating": "3.6 out of 5 stars",
"Description": "Krisons 5.1 Speaker System has various input sources like Bluetooth, USB ,FM Radio , AUX-IN and SD Card reader and is compatible with your Mobile Phon [...]",
"Category": "Electronics",
"Url": "http://www.amazon.in/KRISONS-BLUETOOTH-MULTIMEDIA-SPEAKER-THEATER/dp/B019FR8ZYQ/ref=sr_1_1?s=electronics&ie=UTF8&qid=1462974388&sr=1-1",
"userId": ObjectId("570dec75cf30bf4c09679deb"),
"purchased": "yes",
"contributed": ""
}
{
"_id": ObjectId("5734534d242223b40d9bbe3c"),
"quantity": "2",
"store": "amazon",
"purchasedPerson": "vinay",
"email": "vinay@gmail.com",
"message": "I purchased this item for you",
"terms": "yes",
"purchasedItemID": "573337d73e102e40365bb5db",
"purchasedDate": "2016-05-12T09:54:37.916Z",
"ownerId": "570dec75cf30bf4c09679deb"
}