Je veux afficher des données de FireStore à l'aide du fournisseur de flutter. J'ai été coincé s'il vous plaît aide. Voici mes codes
// Page d'affichage du produit P>
import 'package:cloud_firestore/cloud_firestore.dart';
import 'package:shopping/models/product.dart';
class ProductService{
Firestore _firestore=Firestore.instance;
String collection="Products";
Future<List<Product>>getFeaturedProducts(){
_firestore.collection(collection).where('featured', isEqualTo:true).getDocuments()
.then((snap){
List<Product>featuredProducts=[];
snap.documents.map((snapshot)=> featuredProducts.add(Product.fromSnapshot(snapshot)));
return featuredProducts;
});
}
}
3 Réponses :
Vous n'appelez jamais _getfeaturéProduits () à partir de votre AppProvider classe. Donc _FEARTUREDPRODUCTS sera toujours null
Comment appelle-je _getFeaturedProduits () s'il vous plaît aider
C'est votre propre code, vous devez obtenir les résultats de Firebase afin de construire la grille
En classe AppProvider, vous appelez la méthode sur Nom non défini:
_productService.getFeaturedProducts()
import 'package:flutter/material.dart';
import 'package:carousel_pro/carousel_pro.dart';
import 'package:firebase_auth/firebase_auth.dart';
import 'package:shopping/commons/common.dart';
import 'package:provider/provider.dart';
import 'package:shopping/provider/app_provider.dart';
import '../provider/user_provider.dart';
//My packages imports
import 'package:shopping/componets/horizontal_listview.dart';
import 'package:shopping/componets/product.dart';
import 'package:shopping/pages/cart.dart';
import 'package:shopping/pages/login.dart';
class HomePage extends StatefulWidget {
// List<Product> products;
@override
_HomePageState createState() => _HomePageState();
}
class _HomePageState extends State<HomePage> {
TextEditingController _searchController = new TextEditingController();
//final FirebaseAuth _firebaseAuth=FirebaseAuth.instance;
@override
Widget build(BuildContext context) {
final user = Provider.of<UserProvider>(context);
final productProvider=Provider.of<CRUDModel>(context);
Widget image_carousel = new Container(
height: 200.0,
child: new Carousel(
boxFit: BoxFit.cover,
images: [
AssetImage('images/c1.jpg'),
AssetImage('images/m1.jpeg'),
AssetImage('images/m2.jpg'),
AssetImage('images/w1.jpeg'),
AssetImage('images/w3.jpeg'),
AssetImage('images/w4.jpeg'),
],
autoplay:true,
animationCurve: Curves.fastOutSlowIn,
animationDuration: Duration(milliseconds:1000 ),
dotSize: 4.0,
indicatorBgPadding: 8.0,
dotBgColor: Colors.transparent,
),
);
return Scaffold(
appBar: new AppBar(
iconTheme: IconThemeData(color: blue),
elevation: 0.1,
backgroundColor: white,
title: Material(
borderRadius: BorderRadius.circular(20),
color: Colors.grey[50],
elevation: 0.0,
child: TextFormField(
controller: _searchController,
decoration: InputDecoration(
hintText: "Search",
border: InputBorder.none,
),
validator: (value) {
if (value.isEmpty) {
return "The Search field cannot be empty";
}
return null;
}),
),
actions: <Widget>[
new IconButton(
icon: Icon(
Icons.search,
color: blue,
),
onPressed: () {},
),
new IconButton(
icon: Icon(
Icons.shopping_cart,
color: blue,
),
onPressed: () {
Navigator.push(context,
MaterialPageRoute(builder: (context) => new Cart()));
}),
],
),
drawer: new Drawer(
child: new ListView(
children: <Widget>[
//drawer header
new UserAccountsDrawerHeader(
accountName: Text("Afolabi"),
accountEmail: Text("mtreal62@gmail.com"),
currentAccountPicture: GestureDetector(
child: new CircleAvatar(
backgroundColor: Colors.grey,
child: Icon(
Icons.person,
color: Colors.white,
),
),
),
decoration: BoxDecoration(
color: blue,
),
),
//body
InkWell(
onTap: () {},
child: ListTile(
title: Text("Home Page"),
leading: Icon(
Icons.home,
color: blue,
),
),
),
InkWell(
onTap: () {},
child: ListTile(
title: Text("My Account"),
leading: Icon(
Icons.person,
color: blue,
),
),
),
InkWell(
onTap: () {},
child: ListTile(
title: Text("My Orders"),
leading: Icon(
Icons.shopping_basket,
color: blue,
),
),
),
InkWell(
onTap: () {
Navigator.push(context,
MaterialPageRoute(builder: (context) => new Cart()));
},
child: ListTile(
title: Text("Shopping Cart"),
leading: Icon(
Icons.shopping_cart,
color: blue,
),
),
),
InkWell(
onTap: () {},
child: ListTile(
title: Text("Favourites"),
leading: Icon(
Icons.favorite,
color: blue,
),
),
),
Divider(),
InkWell(
onTap: () {},
child: ListTile(
title: Text("Settings"),
leading: Icon(
Icons.settings,
),
),
),
InkWell(
onTap: () {},
child: ListTile(
title: Text("About"),
leading: Icon(
Icons.help,
),
),
),
InkWell(
onTap: () {
user.signOut();
// changeScreenReplacement(context, Login());
},
child: ListTile(
title: Text("Log Out"),
leading: Icon(
Icons.transit_enterexit,
),
),
),
],
),
),
body: new Column(
children: <Widget>[
//Image Carousel for the home Page Banner
image_carousel,
//padding widget after carousel
new Padding(
padding: const EdgeInsets.all(8.0),
child: Container(
alignment: Alignment.centerLeft,
child: new Text("Categories"),
),
),
//Horizontal layout start from here
HorizontalList(),
//End of the horizontal layout
//padding widget for Recent products categories
new Padding(
padding: const EdgeInsets.all(8.0),
child: Container(
alignment: Alignment.centerLeft,
child: new Text("Recent Products"),
),
),
// Text(appProvider.featuredProducts.length.toString(),
//style: TextStyle(color: Colors.black),),
Flexible(
child: Products(),
),
//Horizontal layout start from here
],
),
);
}
}
Future _signOut() async {
try {
await FirebaseAuth.instance.signOut();
} catch (e) {
print(e); // TODO: show dialog with error
}
}