I am trying the following, but it returns: [object Object]
var query='{\"selector\":{\"_id\":{\"$gt\":null}},\"sort\": [{\"unixtime\": \"asc\"}],\"skip\":0 } ';
var pageSize=3;
var bookmark;
const employeerAsBytes = await ctx.stub.getQueryResultWithPagination(query,pageSize,bookmark); // get the employeeId from chaincode state
var mainData=employeerAsBytes.toString();
console.log("main data in getRecordByPagination ",mainData);
Related
I have using redis to cache my queries. Its working fine with object but not when i get array. It gives me an error **"Parameter "obj" to Document() must be an object, got kids", **. It also happens with count query. Here is my code :
const mongoose = require("mongoose");
const redis = require("redis");
const util = require("util");
const client = redis.createClient(process.env.REDIS_URL);
client.hget = util.promisify(client.hget);
const exec = mongoose.Query.prototype.exec;
mongoose.Query.prototype.cache = async function (options = {}) {
this.useCache = true;
this.hashKey = JSON.stringify(options.key || "");
this.time = JSON.stringify(options.time || 36000);
return this;
};
mongoose.Query.prototype.exec = async function () {
if (!this.useCache) {
return exec.apply(this, arguments);
}
const key = JSON.stringify(
Object.assign({}, this.getQuery(), {
collection: this.mongooseCollection.name,
})
);
// client.flushdb(function (err, succeeded) {
// console.log(succeeded); // will be true if successfull
// });
const cacheValue = await client.hget(this.hashKey, key);
if (cacheValue) {
const doc = JSON.parse(cacheValue);
/*
this.model refers to the Class of the corresponding Mongoose Model of the query being executed, example: User,Blog
this function must return a Promise of Mongoose model objects due to the nature of the mongoose model object having other
functions attached once is created ( validate,set,get etc)
*/
console.log("Response from Redis");
console.log(doc);
console.log(Array.isArray(doc));
return Array.isArray(doc)
? doc.map((d) => new this.model(d))
: new this.model(doc);
}
//await the results of the query once executed, with any arguments that were passed on.
const result = await exec.apply(this, arguments);
client.hset(this.hashKey, key, JSON.stringify(result));
client.expire(this.hashKey, this.time);
console.log("Response from MongoDB");
return result;
};
module.exports = {
clearHash(hashKey) {
client.del(JSON.stringify(hashKey));
},
};
Data in redis - [ 'kids', 'men', 'women' ]
Query - const collectionType = await Product.find() .distinct("collectionType") .cache({ key: "COLLECTION_TYPE" });
can i anyone please tell me what i am doing wrong?
I have solved by directly returning the doc and its working fine. Not sure if it is the right way if i directly do return doc then sending data from redis only
I develop for Firebase Cloud Functions. I have a Firebase Realtime Database like this:
----- myData
-------eqewrwrepere (this one is a device token)
---------Lta+sde-fer (this one is a firebase id)
firstvalue : "a"
secondvalue : "b"
----------Qrgd+ad-qdda (this one is second firebase id)
firstvalue : "c"
secondvalue : "d"
-------eqwerSAsdqe (this one is another device token)
---------Lta+sde-fer (this one is a firebase id)
firstvalue : "x"
secondvalue : "y"
----------Qrgd+ad-qdda (this one is second firebase id)
firstvalue : "z"
secondvalue : "t"
I fetch these data by this code. With this code i fetch all data and put them an array. And when fetching done, i loop this array for finding items. I am an iOS developer, so i am a newbie for NodeJS. Here is what i want to do:
Get firstvalue for each database data.
Make a api request with firstvalue of each database data.
Api returns an image.
Write image temp directory.
Process this image for visionApi.
Extract text.
Update database.
Send notification for deviceToken
Now i am able to retrieve database items in my array. When i make a request in for loop, request called async. So for loop continues, but request response or writing file and vision processing executed only once.
In for loop, get databasearray[0], make request, write file, process it with vision api, update database and go for next databasearray[1] item.
I read about Promises on different pages. But i did not understand.
Thank you.
'use strict';
const functions = require('firebase-functions');
const admin = require('firebase-admin');
admin.initializeApp(functions.config().firebase);
var request = require('request');
var fs = require('fs');
//var fs = require("fs");
// Get a reference to the Cloud Vision API component
const Vision = require('#google-cloud/vision');
const vision = new Vision.ImageAnnotatorClient();
// Imports the Google Cloud client library
//const {Storage} = require('#google-cloud/storage');
var fs = require("fs");
var os = require("os");
var databaseArray = [];
exports.hourly_job = functions.pubsub
.topic('hourly-job')
.onPublish((event) => {
console.log("Hourly Job");
var db = admin.database();
var ref = db.ref("myData")
ref.once("value").then(function(allData) {
allData.forEach(function(deviceToken) {
deviceToken.forEach(function(firebaseIDs) {
var deviceTokenVar = deviceToken.key;
var firebaseIDVar = firebaseIDs.key;
var firstvalue = firebaseIDs.child("firstvalue").val();
var secondvalue = firebaseIDs.child("secondvalue").val();
var items = [deviceTokenVar, firebaseIDVar, firstvalue, secondvalue];
databaseArray.push([...items]);
});
});
return databaseArray;
}).then(function(databasem) {
var i;
for (i = 0; i < databaseArray.length; i++) {
var databaseArrayDeviceToken = databaseArray[i][0];
console.log("DeviceToken: " + databaseArrayDeviceToken);
var databaseArrayFirebaseID = databaseArray[i][1];
console.log("FirebaseID: " + databaseArrayFirebaseID);
var databaseArrayfirstvalue = databaseArray[i][2];
console.log("firstval: " + databaseArrayfirstvalue);
var databaseArraysecondval = databaseArray[i][3];
console.log("Second: " + databaseArraysecondval);
var url = "http://api.blabla" + databaseArrayfirstvalue;
/////////////here make a request, pause loop, process returned image, but how //////////////////////
request.get({
url: url,
encoding: 'binary'
}, function(error, httpResponse, body) {
if (!error && httpResponse.statusCode == 200) {
fs.writeFileSync('/tmp/processed.jpg', body, 'binary')
console.log("file written");
})
}
});
return true;
});
I found solution with Mocas helps. Here is the solution. I use async/await functions in code. Now for loop waits for the function response. But now I have different problems. I think main async function hangs because of awaits. And then next hourly trigger, it runs again. So console log shows 15-16-17 or more ‘i’ values in for loop. I have 4 element in database array but console log shows more than this every hour. And it increases every time. So I guess that I should cancel this await functions after a timeout. But I don’t know how. Here is code:
use strict';
const functions = require('firebase-functions');
const admin = require('firebase-admin');
admin.initializeApp(functions.config().firebase);
var request = require('request-promise').defaults({ encoding: null });
var fs = require('fs');
// Get a reference to the Cloud Vision API component
const Vision = require('#google-cloud/vision');
const vision = new Vision.ImageAnnotatorClient();
var os = require("os");
var databaseArray = [];
var uniqueFilename = require('unique-filename')
exports.hourly_job = functions.pubsub
.topic('hourly-job')
.onPublish((event) => {
console.log("Hourly Job");
var db = admin.database();
var ref = db.ref("myData")
ref.once("value").then(function(allData) {
allData.forEach(function(deviceToken) {
deviceToken.forEach(function(firebaseIDs) {
var deviceTokenVar = deviceToken.key;
var firebaseIDVar = firebaseIDs.key;
var firstvalue = firebaseIDs.child("firstvalue").val();
var secondvalue = firebaseIDs.child("secondvalue").val();
var items = [deviceTokenVar, firebaseIDVar, firstvalue, secondvalue];
databaseArray.push([...items]);
//console.log(databaseArray);
//return true;
});
//return true;
});
return databaseArray;
}).then(function (databasem) {
main().catch(console.error);
});
return true;
});
const main = async () => {
var i;
for (i = 0; i < databaseArray.length; i++) {
console.log("Database Arrays " + i + ". elements: ");
var databaseArrayDeviceToken = databaseArray[i][0];
console.log("DeviceToken: " + databaseArrayDeviceToken);
var databaseArrayFirebaseID = databaseArray[i][1];
console.log("FirebaseID: " + databaseArrayFirebaseID);
var databaseArrayfirst = databaseArray[i][2];
console.log("first: " + databaseArrayfirst);
var databaseArraysecond = databaseArray[i][3];
console.log("second: " + databaseArraysecond);
if (databaseArrayfirst != "") {
var apiUrl = "http://api.blabla;
try {
const apiBody = await request.get(apiUrl);
///////////////////////////vison start//////////////////////
const visionResponseBody = await vision.documentTextDetection(apiBody)
var visionResponse = visionResponseBody[0].textAnnotations[0].description;
console.log("Vision response text " + visionResponse );
...some logic here about response...
/////////////////////////////////////////////////
var getdatabasevar = await admin.database().ref("myData/" + databaseArrayDeviceToken + "/" + databaseArrayFirebaseID);
await getdatabasevar.update({
"firstvalue": visionResponse
});
/////////////////////////////////////////////////
var getanotgerdatabasevar = await admin.database().ref("myData/" + databaseArrayDeviceToken + "/" + databaseArrayFirebaseID + "/" + "secondvalue");
await getanotgerdatabasevar.once("value")
.then(function(var) {
..some logic..
//send notification
});
} catch (error) {
console.error(error);
}
///////////////////////////vison end//////////////////////
}
};
return true;
};
I want to send the ltc using bitGo js api, but its not wokring there is issue of the amount.It works well for btc but not for ltc.I have tried to covert the amount into satoshi and litoshi but till it not working.Following is my code:
const BitGoJS = require('../../src/index');
const bitgo = new BitGoJS.BitGo({ env: 'test' });
const Promise = require('bluebird');
const coin = 'tltc';
const basecoin = bitgo.coin(coin);
// TODO: set your access token here
const accessToken = null;
const walletId = '5941ce2db42fcbc70717e5a898fd1595';
// TODO: set your passphrase here
const walletPassphrase = null;
Promise.coroutine(function *() {
bitgo.authenticateWithAccessToken({ accessToken: accessToken });
const walletInstance = yield basecoin.wallets().get({ id: walletId });
const newReceiveAddress1 = yield walletInstance.createAddress();
const newReceiveAddress2 = yield walletInstance.createAddress();
const transaction = yield walletInstance.sendMany({
recipients: [
{
amount: '12341234', //not getting how to convert the amount here
address: newReceiveAddress1.address
},
],
walletPassphrase: walletPassphrase
});
const explanation = basecoin.explainTransaction({ txHex: transaction.tx });
console.log('Wallet ID:', walletInstance.id());
console.log('Current Receive Address:', walletInstance.receiveAddress());
console.log('New Transaction:', JSON.stringify(transaction, null, 4));
console.log('Transaction Explanation:', JSON.stringify(explanation, null, 4));
})();
Please suggest some solution how to resolve the amount issue while passing to the api for send method in bitGo js
I want to save an image not in my server but in my database.
this is my model
var mongoose = require('mongoose');
var Schema = mongoose.Schema;
var categorySchema = new Schema({
img: { data: Buffer, contentType: String },
});
module.exports = mongoose.model('Category', categorySchema);
now in my router I'm getting this base64 image with a long string.
{ '$ngfDataUrl': 'data:image/png;base64,long-String'}
I want to know how do I save this information in my mongoose db database so far i have this.
router.post('/add', function (req, res) {
var category = new Category();
category.img.data = req.body.category.img;
category.img.contentType = 'image/png';
category.save(function (err) {
if (err) throw new Error(err);
res.sendStatus(200)
});
but obviously that is not working i get this error.
Error: ValidationError: CastError: Cast to Buffer failed for value "{
'$ngfDataUrl': 'data:image/png;base64, long-String'}
Thanks in advance I'm in saving files.
You'll want to actually pull out the base64 string from the request body, and save that.
Is req.body.category.img equal to { '$ngfDataUrl': 'data:image/png;base64,long-String' }, where long-String is the base64 representation of the image?
If so, do something like this:
const category = new Category();
const img = req.body.category.img;
const data = img['$ngfDataUrl'];
const split = data.split(','); // or whatever is appropriate here. this will work for the example given
const base64string = split[1];
const buffer = Buffer.from(base64string, 'base64');
category.img.data = buffer;
// carry on as you have it
When I fetch the records from Db it shows the below error.
TypeError: Object #<Object> has no method 'query'
I created the DB configuration on separate file in the name as dbConfig.js and used it on another file. It looks likes below:
In dbConfig.js:
var pg = require('pg');
var conString = "postgres://pgadmin:e100095#localhost:5432/searchtest";
var dbClient = new pg.Client(conString);
//dbClient=dbClient.connect();
dbClient.connect(function(err) {
if (err) {
console.error('error connecting: ' + err.stack);
return;
}
});
the record fetching query is :
var configDB= require('../dbConfig');
var query = configDB.query("SELECT * FROM resource_url where id = "+indexID,function(err,result){
if(err){console.log("Error : "+err);}
else {colsole.log("results");}
});
You can replace your code:
var pg = require('pg');
var dbClient = new pg.Client(conString);
change:
var pg = require('pg').Client;
var dbClient = new pg(conString);
And conString, you also use as below:
var conString = {
user : 'my_user',
password : 'my_pass',
database : 'my_database',
host : 'my_host', // example abc.com
port : my_port
};