我是rethinkDB的新手,我试图通过用户名使用过滤功能查找数据。 但是,只要存在数据,rethinkDB就会返回null。
//Define Your Api//Define Your Api
import express from 'express';
import r from 'rethinkdb';
const router = express.Router();
router.post('/users',(req,res)=>{
let username = req.body.data.username;
let password = req.body.data.password;
console.log(username,password);
r.connect({db:"image"}).then((conn) => {
r.table("users").filter({username:"arfo"}).run(conn,function (err, data) {
console.log(data) //null
})
})
});
export default router
更新
它返回了我这样的一堆数据,我必须操纵这些数据
Cursor {
_type: 3,
_eachCb: [Function],
_conn:
TcpConnection {
host: 'localhost',
port: 28015,
db: 'image',
authKey: '',
timeout: 20,
ssl: false,
outstandingCallbacks: {},
nextToken: 2,
open: true,
closing: false,
buffer: <Buffer >,
_events: {},
_eventsCount: NaN,
_closePromise: null,
rawSocket:
Socket {
connecting: false,
_hadError: false,
_handle: [Object],
_parent: null,
_host: 'localhost',
_readableState: [Object],
readable: true,
domain: null,
_events: [Object],
_eventsCount: 7,
_maxListeners: undefined,
_writableState: [Object],
writable: true,
allowHalfOpen: false,
destroyed: false,
_bytesDispatched: 325,
_sockname: null,
_pendingData: null,
_pendingEncoding: '',
server: null,
_server: null,
user: 'admin',
password: '',
read: [Function],
_consuming: true } },
_token: 1,
_opts: {},
_root: { [Function] args: [ [Object], [Object] ], optargs: {} },
_responses: [ { t: 2, r: [Object], n: [] } ],
_responseIndex: 0,
_outstandingRequests: 0,
_iterations: 0,
_endFlag: true,
_contFlag: false,
_closeAsap: false,
_cont: null,
_cbQueue: [],
_closeCb: null,
_closeCbPromise: null,
next: [Function] }
答案 0 :(得分:3)
从RethinkDB docs开始,run
看起来像(err, data)
。例如(来自文档):
r.table('marvel').run(conn, function(err, cursor) {
cursor.each(console.log);
})
因此,如果您将代码更新为:
r.table("users").filter({username:"arfo"}).run(conn,function (err, data) {
console.log(data)
})
然后它应该删除您看到的null
日志。
我不是RethinkDB专家,但是如果您想从响应中获取数据,那么从文档看起来就可以在光标上调用toArray
:
r.table("test").run( conn, function(error, cursor) {
cursor.toArray( function(error, results) {
console.log(results) // results is an array of documents
})
})