Connection between nativescript and MongoDB (mongoose) - mongodb

Question

I am new in mobile development world and right now trying to understand few basic things.
I did a simple login nativescript app and from backend side did a login logic with mongoose (MongoDb) and express. But now I don't know how to proceed... How do I connect between backend and app?
Thank you in advance,
Emil

Answer 1

You need to expose an API from your backend, I'll assume you have done this (or can find this out - it's very well documented).
So from the client {N} you will need to access the API, calling whichever end-points you need. If you were using a JWT type approach, you should use the http module in nativescript, which might look something like this:
var http = require("http");
var result;
http.request({
url: "https://myBackend.org/api/post",
method: "POST",
headers: { "Content-Type": "application/json" },
content: JSON.stringify({ username: "ValueOne", password: "ValueTwo" })
}).then(function (response) {
result = response.content.toJSON();
console.log(result); //result.message would have the clients auth token
}, function (e) {
// console.log("Error occurred " + e);
});
You could then store the token (in persistent storage with the application-settings module) and add it to the header of any request to a different API endpoint to interact with your backend as an authenticated user.
Alternatively, you can use one of the cloud backend SDKs, e.g. Azure Mobile Services or Firebase which make your life much easier.