#This is a class for mongodb from Moonlight, refer some common method of mongodb,such find, findOne, insertOne etc. ##Prerequisite: Require: mongodb
#Quick Start ##install npm install mn_Mongodb --save ##Basic Usage ###usual params
options 为数据库的参数，如下样例：
const options = {
url : "mongodb://localhost:27017",
dbName : "booklist",
collectionName : "booklist"
};
document 为要插入的文档，如下样例：
const document = {
corpId : "123456789" ,
user : "mXXXXXSXX2" ,
content:content ,
timestamp : Date.now()
};
const Mongodb = require('mn_mongodb');
const mongodb= new Mongodb();
mongodb.setOptions(options);
###Method aggregate
const _id="$userId";
const firstResumePeriod={$first:"$resumePeriod"};
const group={_id:_id,firstResumePeriod:firstResumePeriod};
const pipeline=[{$group:group}];
mongodb.aggregate(pipeline,(err,cursor) => {
assert.equal(err, null);
cursor.toArray(function(err, documents) {
console.log(documents);
callback(documents);
});
});
options is option. cursor: user cursor just like above; Ref:. http://mongodb.github.io/node-mongodb-native/3.1/api/Collection.html#aggregate
###Method insertOne mongodb.insert(document,options,(err,result) => { if (err) { return conssole.log(err)} console.log(result); });
options is option.
result: success: result.errCode ==0 , failure errCode !=0 .
Ref.
http://mongodb.github.io/node-mongodb-native/3.1/api/Collection.html#insertOne
###Method find
query为查询条件，样例如下：
const query= {trimContent:"XXX"};
mongodb.find(query,options,(err,result) => {
if (err) {conssole.log(err)}
console.log(result);
})
options is option.
options example: {sort:[["timestamp",-1]]} means: sort by field timestamp descending order. 1 is means ascending.
[timestamp,-1] is ok , too.
The result is a array, it include the documents that meet the condition of query.
Ref:
http://mongodb.github.io/node-mongodb-native/3.1/api/Collection.html#find
###Method findOne
query为查询条件，样例如下：
const query= {trimContent:"XXX"};
mongodb.findOne(query,options,(err,result) => {
if (err) {conssole.log(err)}
console.log(result);
})
options is option.
options example: {sort:[["timestamp",-1]]} means: sort by field timestamp descending order. 1 is means ascending.
[timestamp,-1] is ok , too.
The result is a document that meet the condition of the query.
Ref:
http://mongodb.github.io/node-mongodb-native/3.1/api/Collection.html#findOne
###Method findOneAndUpdate
const query= {trimContent:"XXX"};
mongodb.findOneAndUpdateOne(filter,update,options,(err,result) => {
if (err) {conssole.log(err)}
console.log(result);
})
update is like {$set:{resume:"XXXXXXXX"}}; resume is field of a document.
options is option.such as {sort:[["timestamp",-1]]}
The result: update successfully, errCode = 0 else not equal 0 ;
http://mongodb.github.io/node-mongodb-native/3.1/api/Collection.html#findOneAndUpdate
###Method updateOne
const query= {trimContent:"XXX"};
mongodb.updateOne(filter,update,options,(err,result) => {
if (err) {conssole.log(err)}
console.log(result);
})
update is like {$set:{resume:"XXXXXXXX"}}; resume is field of a document.
options is option.
The result: update successfully, errCode = 0 else not equal 0 ;
http://mongodb.github.io/node-mongodb-native/3.1/api/Collection.html#updateOne