Skip to main content

Display the data if the user has permissions to read the data in React(Firebase)

I need to write a program that will display specific data if the user has permission to view those documents. Below is the code, the user has permissions, but I still can't see the data. Thank you for your help! I need to read data from the collection named my_collection, and to display it if user has permissions. Rules are:

import { useEffect, useState } from 'react';
import { getFirestore, collection, query, where, getDocs } from 'firebase/firestore';
import { auth } from '../firebase';
 
const Home = () => {
  const [data, setData] = useState([]);
 
  const checkUserPermissions = async (userId) => {
    const db = getFirestore();
    const userPermissionsQuery = query(
      collection(db, 'my_collection'),
      where('user.id', '==', userId)
    );
 
    const userPermissionsSnapshot = await getDocs(userPermissionsQuery);

    if (!userPermissionsSnapshot.empty) {
      const nikolaPozoristeQuery = query(collection(db, 'my_collection'));
      const nikolaPozoristeSnapshot = await getDocs(nikolaPozoristeQuery);
      const items = nikolaPozoristeSnapshot.docs.map((doc) => doc.data());
      setData(items);
    } else {
      setData([]); // If the user doesn't have permission, set data to an empty array
    }
  };
 
  useEffect(() => {
    const user = auth.currentUser;
    if (user) {
      const userId = user.uid; // Use the user's ID
      checkUserPermissions(userId);
    }
  }, []);
 
  const renderTableRows = () => {
    return data.map((item, index) => (
      <tr key={index}>
        <td>{item.code}</td>
        <td>{item.date}</td>
        <td>{item.event}</td>
        <td>{item.readtime}</td>
        <td>{item.tel}</td>
  
      </tr>
    ));
  };
 
  return (
    <div>
      <h2>Welcome</h2>
      {data.length > 0 ? (
        <table>
          <thead>
            <tr>
              <th>Code</th>
              <th>Date</th>
              <th>Event</th>
              <th>Read Time</th>
              <th>Tel</th>

            </tr>
          </thead>
          <tbody>{renderTableRows()}</tbody>
        </table>
      ) : (
        <p>No data available</p>
      )}
    </div>
  );
      }
 
export default Home;
Via Active questions tagged javascript - Stack Overflow https://ift.tt/SH8OUAr

Comments

Popular posts from this blog

Why is my reports service not connecting?

I am trying to pull some data from a Postgres database using Node.js and node-postures but I can't figure out why my service isn't connecting. my routes/index.js file: const express = require('express'); const router = express.Router(); const ordersCountController = require('../controllers/ordersCountController'); const ordersController = require('../controllers/ordersController'); const weeklyReportsController = require('../controllers/weeklyReportsController'); router.get('/orders_count', ordersCountController); router.get('/orders', ordersController); router.get('/weekly_reports', weeklyReportsController); module.exports = router; My controllers/weeklyReportsController.js file: const weeklyReportsService = require('../services/weeklyReportsService'); const weeklyReportsController = async (req, res) => { try { const data = await weeklyReportsService; res.json({data}) console...

How to show number of registered users in Laravel based on usertype?

i'm trying to display data from the database in the admin dashboard i used this: <?php use Illuminate\Support\Facades\DB; $users = DB::table('users')->count(); echo $users; ?> and i have successfully get the correct data from the database but what if i want to display a specific data for example in this user table there is "usertype" that specify if the user is normal user or admin i want to user the same code above but to display a specific usertype i tried this: <?php use Illuminate\Support\Facades\DB; $users = DB::table('users')->count()->WHERE usertype =admin; echo $users; ?> but it didn't work, what am i doing wrong? source https://stackoverflow.com/questions/68199726/how-to-show-number-of-registered-users-in-laravel-based-on-usertype

The number of nodes and edges I calculated manually and by a method provided by networkx library dont match

I am trying to analyse a graph using networkx library in Python. I have implemented a function that returns the nodes and edges of that graph. After that I counted the number of nodes and edges by implementing the len() function for nodes and edges, which gave me 17 for both nodes and edges. However, when I used the method graph.number_of_nodes() of networkx library it gave me 53. My code: import pandas as pd import networkx as nx import matplotlib.pyplot as plt header_list = ["a","b","w"] E =pd.read_csv("aves-barn-swallow-contact-network.edges",sep=" ",header= None,names=header_list) # print(E.head()) # prints first few rows of the csv file G = nx.from_pandas_edgelist(E,"a","b",["w"]) nx.draw(G) plt.show() class GraphAnalyse: #finding nodes and edges def nodeEdge(self,Graph): nodes = Graph.nodes() edges = Graph.edges() ...