I am using Admin on Rest to create a dashboard for my rest calls.
The call is going through and I looked at the call in my console.
GET /api/v2/admin/user?_end=10&_order=DESC&_sort=id&_start=0 200 61.102 ms - 2846
But it isn't returning anything, which I assume is because Mongo doesn't take in queries with _end, _order, _start, as well as it uses _id instead of id.
What would be the best workaround for this? As I can't modify the call going in.
The logic for the endpoint is below. I am also (not pictured) trying to manually create the sorting options but I feel like that isn't efficient.
// routes/admin/user.js
var express = require('express'),
router = express.Router();
var User = require(__models + 'user');
router.route('/')
.get(function(req, res, next){
var query = req.query || {};
User.find(query).then(users => {
return res.json(users);
}).catch(err => next(err));
});
module.exports = router;
You need to write your own REST Client for creating queries in formats your REST API understands.
https://marmelab.com/admin-on-rest/RestClients.html#writing-your-own-rest-client
I created a util function to do this for me.
module.exports.getJsonFromUrl = function(query) {
var result = {};
query.split("&").forEach(function(part) {
var item = part.split("=");
result[item[0]] = decodeURIComponent(item[1]);
});
return result;
};
And I called it from controller like so
var query = routeUtil.getJsonFromUrl(req._parsedUrl.query);
Related
I am currently trying to create a remote method in loopback that will query a firebase database using the Firebase Admin SDK in NodeJS.
It works, but the issue I am having is that I am unable to make it realtime. It keeps crashing with an error pointing to the callback function being called more than once.
Here is a snippet of the code for my remote method:
'use strict';
module.exports = function(Scusers) {
var admin = require("firebase-admin");
Scusers.listItems = function(cb) {
// Get a database reference
var db = admin.database();
var ref = db.ref("users");
// Attach an asynchronous callback to read the data at our posts reference
var items = [];
// return list of users ordered by key and push each object into an array
ref.orderByKey().on("value", function(snapshot) {
snapshot.forEach(function(data) {
items.push(data.val());
});
// return array
cb(null, items);
}, function (errorObject) {
console.log("The read failed: " + errorObject.code);
});
};
}
If I change this line:
ref.orderByKey().on
for:
ref.orderByKey().once
It works, but on my front-end which is coded in AngularJS, it won't see the changes unless I manually call a refresh.
What should be the best approach to this? Sorry if it is unclear or my approach is wrong, I am so new at this. Thanks!
I am very new to node and express i read some documentation but i did not get any solid understanding how to create rest api with node, So with below basic code i just want to create get api with express and return response to angularjs factory method.I would like to get help and better understanding for the following .
1- How to return response with GET api ?
2- If we have json object how can i pass that data using GET api ?
app.js
var express = require('express');
var path = require('path');
var app = express();
app.use(express.static('./'));
var server = app.listen(3000, function(){
var host = server.address().address;
var port = server.address().port;
console.log('Example app listening at http',host,port);
});
app.get('/test', function(req, res) {
res.type('text/plain'); // set content-type
res.send('i am a beautiful butterfly'); // send text response
});
workerController.js
$scope.getTestData = function(){
alert('got function working');
workerFactory.getData().then(function(response){
var dataResponse = response.data;
console.log(dataResponse);
})
}
workerFactory.js
angular.module('myApp').factory('workerFactory', function ($http) {
'use strict';
return {
getData: function(){
return $http.get('/test');
}
}
});
For the second part, how to pass a JSON object back. You can change your API code to something like:
app.get('/test', function(req, res) {
res.json({message: 'i am a beautiful butterfly'}); // send a JSON response
});
I'm just working on the first part of the question
You can get a full working REST-full API code by using Amplication, it's an open-source for generating Node.js code by only defining your data model.
As you have the basic understanding on REST API you can use this node module
https://github.com/swagger-api/swagger-node for creating great REST API.
I really do not understand how to handle URLs with queries appended to it.
I have endpoints that accept several parameters like:
?max_length=50,
?min_length=1,
?active=true,
?only_today=true,
?etc...
Via AngularJS how can I set those value dynamically only if the user has checked for those values?
Actually I'm just building an object {} appending those parameters when the $scope is not null. But I don't think it is a good idea.
Same for NodeJS and MongoDB...
How can I get the correct object based on the query string on the URL?
What I'm doing here as well is to split up the URL and checking for the words, etc... I'm sure there is a better way and I can not find it in both documentations and wondering to bigger and bigger URL parameters it start to be hell.
I know this is a real low level question but I don't really understand how to handle it.
Thanks
You can use the $location service for that.
https://docs.angularjs.org/api/ng/service/$location
You can use $resource to easily map your endPoints to your services. You should map your params to what is expected in your api. And if you have conditional parameters, you need to handle undefined params in your backend and ignore these params. For mapping your endpoints in nodeJS check out Restify
For example:
angular.module("myApp", []).factory("myFactory", function($resource) {
var YourResource = $resource('/rest/yourResource');
var factory = {
retriveMyResources: function(paramsQuery) {
return YourResource.query(paramsQuery).$promise;
}
};
return factory;
}).controller("myCtrl", function($scope, myFactory) {
myFactory.retrieveMyResources({
maxLength: $scope.maxLength,
sortBy: $scope.sortBy
}).then(function(result) {
$scope.result = result
})
})
Your node server
//App.js you initialize your server, and include your route files
(function() {
var restify = require("restify");
var server = restify.createServer({
name: "test-server"
});
server.pre(restify.CORS());
server.use(restify.gzipResponse());
server.use(restify.acceptParser(server.acceptable));
server.use(restify.queryParser());
server.use(restify.bodyParser());
server.use(restify.jsonp());
require("./routes/your_resource_route.js")(server);
server.listen("1921", function() {
console.log('%s listening at %s environment: %s', server.name, server.url, process.env.NODE_ENV);
});
})();
Example Route file
module.exports = function(server) {
var yourResourceService = require("services/your_resource_service.js");
server.get("rest/yourResource",
function(req, res, next) {
return yourResourceService.findResources(req.params.maxLength, req.params.sortBy).then(function(resources) {
res.send(200, resources);
next();
}).catch(function(err) {
res.send(500, err);
next();
}).done();
}
);
}
And your service file
module.exports = function(app_context) {
var exampleService = {
findItems: function(maxLength, sortBy) {
var sortObject = {};
sortObject[sortBy || DEFAULT_SORT] = -1;
return Q(brandMongooseCollection.find({}).sort(sortObject).limit(maxLength || DEFAULT_MAX_LENGTH).lean().exec());
}
};
return exampleService;
};
I'm building an app and learning the MEAN stack. I successfully followed a tutorial on thinkster last night and was able to get everything working as expected. Now, however, while trying to do this myself, I'm running into issues. The homepage of my app "burbank" loads fine, but the 3 routes I've created just hang. No errors, nothing in terminal, just try forever to load.
localhost:3000 loads fine
localhost:3000/contacts hangs
index.js
var mongoose = require('mongoose');
var Contact = mongoose.model('Contact');
var Event = mongoose.model('Event');
var Vehicle = mongoose.model('Vehicle');
var express = require('express');
var router = express.Router();
router.get('/contacts', function(req, res, next) {
Contact.find(function(err, contacts){
if(err){ return next(err); }
res.json(contacts);
});
});
router.get('/events', function(req, res, next) {
Event.find(function(err, events){
if(err){ return next(err); }
res.json(events);
});
});
router.get('/vehicles', function(req, res, next) {
Vehicle.find(function(err, vehicles){
if(err){ return next(err); }
res.json(vehicles);
});
});
App.js
var mongoose = require('mongoose');
mongoose.connect = ('mongodb://localhost/burbank');
require('./models/Contacts');
require('./models/Events');
require('./models/Vehicles');
var routes = require('./routes/index');
var users = require('./routes/users');
I originally thought this had to do something with the order that I was placing my requires and variables in app.js, but I don't think that's the case. At any rate, help is much appreciated. I'm slowly grasping all these concepts.
Sometimes all it takes is a weekend away, a hike at the Grand Canyon and 16 hours in the car to find a syntax error.
connect.mongoose = ('mongodb://localhost/burbank');
DOES NOT EQUAL
connect.mongoose('mongodb://localhost/burbank');
To those of you who assisted me, thank you very much. Pardon me while I hang my head in shame.
According to Mongoose docs, the first parameter for find is a dictionary with the filter you want to apply to documents:
http://mongoosejs.com/docs/api.html#model_Model.find
Try something like this:
Contact.find().exec(function(err, contacts) { ...
Try checking to see if the routing works without the mongoose layer using: res.send("example");
When using the .find function in mongoose I believe that you have to pass an empty object as the first parameter (if you want to return the entire collection).
Try changing this:
Contact.find(function(err, contacts){
To this:
Contact.find({}, function(err, contacts){
Repeat that for all of your find queries.
I'm trying to pass multiple parameters in a URL with no luck. I'm not sure if it makes a difference but I am doing it through Angular. I'm trying to send the request to a REST API backend that I know works for single requests. Here is what my backend looks like
index.js
var express = require('express');
var router = express.Router();
var game = require('./game');
router.get('/api/v1/gameRefined/:from_datepicker:to_datepicker:from_timepicker:to_timepicker:selectLevel', game.getAllRefined);
module.exports = router;
game.js
...dbconnection stuff...
var game={
getAllRefined: function(req, res) {
var refines = req.params;
console.log("getting refined games");
pool.getConnection(function(err, connection){
var query = connection.query('SELECT * FROM game WHERE date >= ? AND date <= ? AND time >= ? AND time <= ? and level = ?', [refines.from_datepicker, refines.to_datepicker, refines.from_timepicker, refines.to_timepicker, refines.selectLevel], function(err, rows) {
connection.release();
if(err) {
throw err;
}else{
res.json(rows);
}
});
})
},
}
module.exports = game;
I send the request from this factory
.factory('gameFactory', ['$http',
function($http) {
var _gameFactory = {};
_gameFactory.getRefinedGames = function(dateFrom,dateTo,timeFrom,timeTo,level) {
var encodedParam = encodeURIComponent(baseUrl + '/api/v1/gameRefined/?from_datepicker='+dateFrom+'&to_datepicker='+dateTo+'&from_timepicker='+timeFrom+'&to_timepicker='+timeTo+'&selectLevel='+level+'');
return $http.get(encodedParam);
}
return _gameFactory;
}])
That sends this request that comes back as a 404:
http://localhost:8100/http%3A%2F%2Flocalhost%3A3000%2Fapi%2Fv1%2FgameRefined%2F%3Ffrom_datepicker%3D2015-02-05%26to_datepicker%3D2015-02-19%26from_timepicker%3D12%3A00%26to_timepicker%3D18%3A00%26selectLevel%3D1
I have tried it encoded and not encoded, with forward slashs, with semi colons, but nothing has worked so far.
I don't know why a localhost gets appended at the start, but even trying it in postman without the first localhost still is a 404 error.
How should I be doing this? Any help is appreciated. Thank you.
First, other than separating the work into a factory, you aren't really using Angular here. Second, I would consider posting to your API, return JSON results from the API, and then use a promise to read the data back into Angular.
Use $http.post
Let Angular do this work for you. Something like the below will generate the URL request for you. The return value of $http is also a promise, so using .success and .error will allow you to parse any returned data as well, even if it is just a success or failure message - but it is a great method of passing data between server/API and client.
.factory('gameFactory', ['$http',
function($http) {
return {
reachAPI: function(dateFrom, dateTo) {
$http.post('http://localhost:8080/api/v1', {
'dateFrom': dateFrom,
'dateTo': dateTo
})
.success(function(data, status, headers, config) {
*things happen*
data.somethingReturned // from your API
});
}
}]);
Consider body-parser
I know you said you have confidence in your REST API structure, but body-parser is an Express middleware that can parse URL-encoded strings and may prove helpful in reading your data. Personally, I think it lends towards more readable code.
var app = express();
app.use(bodyParser.urlencoded({ extended: true }));
app.use(bodyParser.json());
router.route('/api').post(function(req, res) {
*things happen*
req.body.dateFrom //find your data
*things happen*
res.json(returnedData);
});
Hope that helps