React-Admin Pagination didn't work properly? - node.js

Question

first of all take a look to the problem :pagination problem
I'm using react-admin for the first time, so i just was getting started and creating some small projects to practice before i integrate it to my real project.
so i'm using react for the front-end and nodejs with express middleware for the backend.
as far i know react-admin has a dataprovider so i created dataprovider.js file:
import { fetchUtils } from 'react-admin';
import { stringify } from 'query-string';
const apiUrl = 'http://localhost:5000';
const httpClient = fetchUtils.fetchJson;
export default {
getList: (resource, params) => {
const { page, perPage } = params.pagination;
const { field, order } = params.sort;
const query = {
sort: JSON.stringify([field, order]),
range: JSON.stringify([(page - 1) * perPage, page * perPage - 1]),
filter: JSON.stringify(params.filter),
};
const url = `${apiUrl}/${resource}?${stringify(query)}`;
httpClient(url).then(({ headers, json }) => {
console.log(headers.get('content-range'))
console.log(json)
});
return httpClient(url).then(({ headers, json }) => ({
data: json.map((resource)=>({...resource, id:resource._id})),
total: parseInt(headers.get('content-range').split('/').pop(), 10),
}));
},
getOne: (resource, params) =>
httpClient(`${apiUrl}/${resource}/${params.id}`).then(({ json }) => ({
data: json,
})),
getMany: (resource, params) => {
const query = {
filter: JSON.stringify({ id: params.ids }),
};
const url = `${apiUrl}/${resource}?${stringify(query)}`;
return httpClient(url).then(({ json }) => ({ data: json }));
},
getManyReference: (resource, params) => {
const { page, perPage } = params.pagination;
const { field, order } = params.sort;
const query = {
sort: JSON.stringify([field, order]),
range: JSON.stringify([(page - 1) * perPage, page * perPage - 1]),
filter: JSON.stringify({
...params.filter,
[params.target]: params.id,
}),
};
const url = `${apiUrl}/${resource}?${stringify(query)}`;
return httpClient(url).then(({ headers, json }) => ({
data: json,
total: parseInt(headers.get('content-range').split('/').pop(), 10),
}));
},
update: (resource, params) =>
httpClient(`${apiUrl}/${resource}/${params.id}`, {
method: 'PUT',
body: JSON.stringify(params.data),
}).then(({ json }) => ({ data: json })),
updateMany: (resource, params) => {
const query = {
filter: JSON.stringify({ id: params.ids}),
};
return httpClient(`${apiUrl}/${resource}?${stringify(query)}`, {
method: 'PUT',
body: JSON.stringify(params.data),
}).then(({ json }) => ({ data: json }));
},
create: (resource, params) =>
httpClient(`${apiUrl}/${resource}`, {
method: 'POST',
body: JSON.stringify(params.data),
}).then(({ json }) => ({
data: { ...params.data, id: json.id },
})),
delete: (resource, params) =>
httpClient(`${apiUrl}/${resource}/${params.id}`, {
method: 'DELETE',
}).then(({ json }) => ({ data: json })),
deleteMany: (resource, params) => {
const query = {
filter: JSON.stringify({ id: params.ids}),
};
return httpClient(`${apiUrl}/${resource}?${stringify(query)}`, {
method: 'DELETE',
}).then(({ json }) => ({ data: json }));
}
};
and the App component which contains Admin:
import * as React from "react";
import { Admin, Resource } from 'react-admin';
import dataProvider from './DataProvider'
import { Products } from "./Products";
const App=()=> {
return (
<div className="App">
<Admin dataProvider={dataProvider}>
<Resource name='Products' list={Products} />
</Admin>
</div>
);
}
export default App;
and this is the products component:
import * as React from "react";
import { List, Datagrid, TextField, EditButton } from 'react-admin';
export const Products = props => (
<List {...props}>
<Datagrid rowClick="edit">
<TextField source='id'/>
<TextField source="Title" />
<TextField source='Brand'/>
<EditButton />
</Datagrid>
</List>
);
--------------------Backend:Nodejs -- expressjs ------------------------------------
and this is my simple server that return products from the database:
const express = require('express')
const app = express()
const port = 5000
var MongoClient = require("mongodb").MongoClient;
const { ObjectId } = require("mongodb"); // or ObjectID
var url = "mongodb://localhost:27017/storedz";
var db;
var storedz;
app.use(function (req, res, next) {
res.header("Access-Control-Allow-Origin", req.header("Origin"));
res.header("Access-Control-Allow-Credentials", true);
res.header(
"Access-Control-Allow-Headers",
"Origin, X-Requested-With, Content-Type, Accept"
);
res.header("Access-Control-Expose-Headers", "Content-Range");
res.header("Access-Control-Allow-Methods", "GET, POST, OPTIONS, PUT, DELETE");
next();
});
MongoClient.connect(url, function (err, database) {
if (err) throw err;
db = database;
storedz = db.db("storedz");
});
app.get('/Products',(req, res) => {
storedz
.collection("products")
.find({})
.toArray((err, result) => {
if (err) {
return res.header(400).json("something went wrong");
}
res.header("Content-Range", `getProducts 0-4/${result.length}`);
console.log(result.length)
res.send(result);
});
})
app.listen(port, () => {
console.log(`Example app listening at http://localhost:${port}`)
})
so everything is working i mean i'm getting all the products, and i u res.header("Content-Range", Products 0-4/${result.length}); because react-admin need it to make the pagination.
so guys if i'm missing something here please correct me and give the right path so i can move to my next step.
thank you.