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How to insert data into mysql using angular and nodejs - getting (NULL, NULL) upon insert - Problem solved

Good day,
I've been trying to learn a bit of angular and nodejs. I found a tutorial on a realtime chat app and made some few adjustment to some function of the code. But the one aspect that I cannot seem to get right is the ability for the user to post to a feed. The login process works, the user is already logged in but the user can't post. I would also like to be able to get all they data i insert from all the user to show up like a normal feedview will. Please assist.
Here are my files:
FROM MY CONTROLLER HERE IS THE CODE WHEN THE BUTTON IS PRESSED
$scope.postDatatoDd = () => {
appService.httpCall({
url: '/posts',
params: {
'posts': $scope.data.info,
'from_user_id': $scope.data.username
}
})
.then((response) => {
// $scope.$apply();
})
.catch((error) => {
alert(error.message);
});
}
and here is my route file:
this.app.post('/posts', async(request,response) => {
const reqResponse = {}
const data = {
posts : request.body.postDatatoDd,
from_user_id: request.body.username
};
if (data.posts === ''){
reqResponse.error = true;
reqResponse.message = `error, input`;
response.status(412).json(reqResponse);
} else {
const result = await helper.insertFeed(data);
if (result === null) {
reqResponse.error = true;
reqResponse.message = `they was an error.`;
response.status(417).json(reqResponse);
} else {
reqResponse.error = false;
reqResponse.userId = result.insertId;
reqResponse.message = `posted succesfully`;
response.status(200).json(reqResponse);
}
}});
and in my helper file there is this function to insert data:
async insertFeed(params){
try {
return await this.db.query(
`INSERT INTO posts (from_user_id,posts) values (?,?)`,
[params.from_user_id,params.postDatatoDd]
);
} catch (error) {
console.warn(error);
return null;
}
}
On the client side here is the button with :
<label for="postDatatoDd">Post</label>
<input type="text" id="postDatatoDd"
ng-model="data.postDatatoDd"
class="feed form-control"
placeholder="post your data here?"
/>
<button ng-click="postDatatoDd()" class="btn btn-primary">Post</button>
</div>
--- EDIT 1---
Data is being inserted now, but it is receiving the values as (NULL, NULL).
--- EDIT 2 ---
After closely looking at the code and fixing some naming variables the code works fine, the data is being inserted in mysql as it should.

Other than a lot of typos when it comes to the variables reference. The code seem to be fine.
Assuming that you using appservice class somewhere in your code and its functioned, then everything else will work.
You are getting the (NULL, NULL) because you are parsing parameters that are not being properly parsed out to your helper file, please close attention to that.
appService
.httpCall({
url: "/posts",
params: {
posts: $scope.data.postbuzz,
from_user_id: $scope.data.username,
},
})
.then((response) => {
$scope.$apply();
})
.catch((error) => {
alert(error.message);
});
make sure that the data that you calling from this above function is similar to $scope parameter you passing in your route file that your requesting:
const data = {
posts : request.body.posts,
from_user_id: request.body.from_user_id}
and in your database helper class you running:
`INSERT INTO posts (from_user_id,post) values (?,?)`,
[params.from_user_id,params.posts]
Hope this was helpful
You seem to have an understand already. your question may help a lot more people in the future.

params should be as following, since the data object has properties from_user_id and posts
`INSERT INTO posts (from_user_id,posts) values (?, ?)`,
[params.from_user_id,params.posts]
Might be useful https://www.w3schools.com/nodejs/nodejs_mysql_insert.asp

--- EDIT 2 ---
After closely looking at the code and fixing some naming variables the code works fine, the data is being inserted in mysql as it should.
If you are new to Angular you can use the code as reference.

Define response structure in Adonisjs with Middleware

I want to define the response structure of my requests in the simplest way, and the first thing that comes in my mind to do this is a middleware.
My endpoints are returning the response content correctly:
{{base_url}}/users returns a list of users:
{
[
{
"id": 44,
"name": "some name"
[...]
}
]
}
What I want to do (in all requests) is to add the fields status and data (or any other I'd like to add), like this:
{
"status": 200,
"data": [
{
"id": 44,
"name": "some name"
[...]
}
]
}
I've created a middleware that waits for the resolution but I'm not able to get the content nor add some property to it.
[...]
async handle ({request, response}, next) {
await next()
const content = response._lazyBody.content
content.status = response.response.statusCode
}
[...]
I know this will not work but I want something similar to this. I've looked in Adonis docs and forum, but no answers fit to my needs.
Any help will be welcome

You can extend Response By extending the core. The simplest way is to create a file inside start folder and name it hooks.js and copy and paste the content below inside it:
const { hooks } = use('#adonisjs/ignitor')
const Response = use('Adonis/Src/Response')
hooks.after.providersBooted(() => {
Response.macro('customJson', function (status, data) {
this.status(status).json({
status,
data
})
})
})
this piece of code extends the Response module and add customJson method to it which takes two arguments, status and data, and send them back to the client.
And here you can see how to use it:
Route.get('/users', async ({ response }) => {
let status = ''// whatever you want
let data = ''// whatever you want
return response.customJson(status, data)
})

Read settings contained in a json file in javascript

Im tring to read a simple setting from a json file, the json is this :
{
"Label": "some string here"
}
form my javascript part i do:
import settings from '../settings.json';
then:
var settings= ()=> {
const headers = new Headers();
const requestOptions = {
method: 'GET',
headers: { ...headers.authentication, ...headers.culture, 'ContentType':'application/json',
};
return fetch(`${settings.Label}`, requestOptions).then(() => {
return response.text().then(text => {
const data = text ? text && JSON.parse(text) : {};
let token = response.headers.get('X-Token');
if (token) {
data.token = token;
}
if (!response.ok) {
// manage error here
}
return Promise.reject(error);
}
return data;
})
});
};
// use settings here
Despite my many searches and attempts im not very expert in javascript,i have tried in many ways before, but the my variable 'settings' is not contain nothing.

I believe you need to add an export to your JSON file
export const settings = {
"label": "some string here"
}

Not much information given here, but this probably has to do with transpiling your javascript. You can use:
const settings = require('../settings.json')
instead.

try this answer https://stackoverflow.com/a/59844868/7701381
Also, change the name of the imported json settings or the var settings, cuz this might cause unexpected behaviors

I had completely wrong the approach, the file is already available and I don't have to request to download it from the server, I just have to return string, without use of fetch or other:
return (`${settings.Label}`
Sorry and thank a lot for the support

How to check if object exists in mLab using _id?

I am working on an angular application with a node.js backend where my architecture goes like this:
front-end => angular.service => node backend => mLab DB
Currently, I'm trying to push an object into the DB provided that it does not exist yet. If it already does, it should update. This function would be accessible via a button from the cards in my front-end.
to give a clearer understanding here's some of my code.
front-end: admin-edit-home.component.html
<a mdbBtn class='btn btn-md btn-primary' mdbWavesEffect (click)="addCard()">Add</a>
the code above is a button where I can add a card to the interface. The TS below shows how the code works.
front-end: admin-edit-home.component.ts
addCard() {
this.carousels.push(this.carousels.length);
}
To give an explanation of the TS code, 'carousels' is an array that I use to do an *ngFor loop in my HTML wherein it presents the data in a card format. It is declared as:
carousels: any = [];
So in pushing a length to the 'carousels' array, it present an empty card with no collected data but still possessing the HTML elements from the original card which contains the supposed update function that I would like to have.
My problem is, how do I do the checking of the object existence from the back-end and present the results back to the front-end? I have tried this,
back-end: api.js
router.route('/carousel/update/:id').put(function(req,res) {
var data = req.body;
const myquery = { _id: ObjectId(req.params.id) };
db.collection('home').updateOne(myquery, {
$set: {
"header" : data.header,
"subheader" : data.subheader,
"img" : data.img
}
})
if (myquery === -1) {
arr.push(obj);
} else {
arr[myquery] = obj
}
}
I know my back-end code is wrong and non-functional but I just wanted to let you guys have a visualisation of what my logic is trying to achieve.
Furthermore, this back-end code should now be accessible by my angular service through this chunk of code below:
home.service.ts
import { Injectable } from '#angular/core';
import { HttpClient } from '#angular/common/http';
#Injectable ({
providedIn: 'root'
})
export class HomeService {
constructor(private http: HttpClient) {}
updateCard(id: string, header: string, subheader: string, img: string) {
var json = {id: id, header: header, subheader: subheader, img: img}
return this.http.put<any[]>(`./api/carousel/update/${id}`, json);
}
}
After trying these things, to sum up my problem in a more concise manner, I need to check from the database if the object is already existing via ObjectId and then update it through my input fields but if not, the updateCard() should create another object in my database. I hope to get help!
EDIT
router.route('/carousel/update/:id').put(function (req, res) {
var data = req.body;
const myquery = { "_id": ObjectId };
// console.log('header: ' + data.header + " id: " + data.id)
console.log(req.params)
db.collection("home").updateMany(myquery, {
$set: {
"img" : data.img,
"header" : data.header,
"subheader": data.subheader
}
}, (err, results) => {
res.status(200).json({status: "ok"})
})
})
This is the new api.js. Please refer.

Using Fetch API with Rails application?

I am trying to use the Fetch API with my Rails application. I can pass parameters to the controller as part of a query string, but still can't figure out how to pass JSON data or where to find it in the controller. A sample call looks like the below. Where can I access my test data on in the controller? Happy Sunday :)
export const fetchControllerData = () => {
return fetch('api/users',), {
body: { "test": "test" }
})
.then(res => res.json());
};

I'm in the process of working out my own issues with fetch and Rails. But I'll take a stab at this.
I expect that fetch is using GET as the default method - which won't use the body at all. You will likely need to set the method to be POST to get the body through. Further to that you might need to set the Content-Type header (to application/json) in order to send the data through as JSON.

May be u need to send params in this way for get request and use this link for https://github.com/axios/axios
export const fetchControllerData = () => {
params = { body: { "test": "test" } }
return HTTP.get('api/users', params)
.then((response) => {
if (response.success) {
// do something here
} else {
// handle error condtion here
}
});
}