Flutter, how can I retrieve user info and display it on specific blog posts from firestore? - flutter

Question

I'm new to dart and flutter comming from java(android). I have a list of posts, which are posted by different users. I want to display user name and user image for each post. The problem is I'm storing users in a "Users" collection and posts in a "Posts" collection. I have user id attached to each post and I can pull it(the id) together with the post details. But I can't use it(the id) to display profile info. Please help, some lines of code to give me some light will be much appreciated.
Bellow is my code to display the posts:
body: StreamBuilder(
stream: Firestore.instance.collection('Posts').snapshots(),
builder: (context, snapshot) {
if (!snapshot.hasData) {
const Text('Loading...');
} else {
return ListView.builder(
itemCount: snapshot.data.documents.length,
itemBuilder: (context, index) {
DocumentSnapshot myPosts = snapshot.data.documents[index];
return Container(
width: MediaQuery.of(context).size.width,
//height: 350,
child: Padding(
padding: EdgeInsets.only(bottom: 8.0),
child: Center(
child: Padding(
padding: EdgeInsets.all(8.0),
child: Column(
mainAxisSize: MainAxisSize.min,
children: <Widget>[
Row(
children: <Widget>[
CircleAvatar(
radius: 20.0,
backgroundColor: Colors.blueGrey,
),
Padding(
padding: const EdgeInsets.only(left: 8.0),
child: Container(
color: Colors.black45,
height: 30,
width: 2,
),
),
Padding(
padding: const EdgeInsets.only(left: 8.0),
child: Column(
crossAxisAlignment:
CrossAxisAlignment.start,
children: <Widget>[
Text(
'user name',
style: TextStyle(
fontSize: 16.0,
fontWeight: FontWeight.bold,
color: Colors.black54,
),
overflow: TextOverflow.ellipsis,
),
Text(
'user status',
style: TextStyle(
color: Colors.grey,
fontSize: 14.0,
),
)
],
),
)
],
),
SizedBox(
height: 10.0,
),
Container(
width: MediaQuery.of(context).size.width,
//height: 200.0,
child: ClipRRect(
borderRadius: BorderRadius.circular(8.0),
child: AspectRatio(
aspectRatio: 16 / 9,
child: FadeInImage.assetNetwork(
width: MediaQuery.of(context).size.width,
placeholder: 'assets/images/loading.jpg',
image: '${myPosts['post_image']}',
fit: BoxFit.fill,
),
),
),
),
SizedBox(
height: 10.0,
),
Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: <Widget>[
Flexible(
child: Padding(
padding: const EdgeInsets.only(right: 8.0),
child: Text(
'${myPosts['post_title']}',
style: TextStyle(
fontSize: 18.0,
fontWeight: FontWeight.bold,
color: Colors.black87,
),
maxLines: 2,
overflow: TextOverflow.ellipsis,
),
),
),
FlatButton(
child: Text(
'Download Pdf',
style: TextStyle(
fontSize: 14.0,
color: Colors.black54,
),
),
shape: OutlineInputBorder(
borderSide: BorderSide(
color: Colors.black54, width: 1),
borderRadius: BorderRadius.circular(5),
),
padding: const EdgeInsets.fromLTRB(
15.0,
4.0,
15.0,
4.0,
),
onPressed: () {},
),
],
),
SizedBox(
height: 10.0,
),
Text(
'${myPosts['post_body']}',
style: TextStyle(
fontSize: 16.0,
),
overflow: TextOverflow.ellipsis,
maxLines: 8,
),
SizedBox(
height: 10.0,
),
Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: <Widget>[
Text(
'Posted ' +
TimeAgo.getTimeAgo(
myPosts['post_time']),
style: TextStyle(color: Colors.grey)),
Text(
'${myPosts['comments_count']} Comment(s)',
style: TextStyle(color: Colors.grey)),
],
),
SizedBox(
height: 10.0,
),
],
),
),
),
),
);
},
);
}
return Loading();
},
),
Everything works fine, the problem is just to pull the user info. I have a class that I use to display user data on the profile page if it might be useful in this case here is the code of it below
import 'package:cloud_firestore/cloud_firestore.dart';
class ProfileService {
getProfileInfo(String uid) {
return Firestore.instance
.collection('Users')
.where('user_id', isEqualTo: uid)
.getDocuments();
}
}
Your help will be much appreciated I'm stuck.

Answer 1

try using this :
Future<DocumentSnapshot> _getDocument(String uid) async {
return await Firestore().collection('Users').where('user_id', isEqualTo: uid).get();
}
it will return u document snapshot which then u can use to get user information