My code was working fine but now I'm unable to see the Profile page as it generates an error and I'm unable to identify, even though I tried to return a Container() at the end of buildProfileButton() but it did not solve the issue as I updated the code of that function later on.
class Profile extends StatefulWidget {
final String profileId;
Profile({this.profileId});
@override
_ProfileState createState() => _ProfileState();
}
class _ProfileState extends State<Profile> {
final String currentUserId = currentUser?.id;
bool isLoading = false;
int postCount = 0;
bool isFollowing = false;
int followerCount = 0;
int followingCount = 0;
List<Post> posts = [];
@override
void initState() {
super.initState();
getProfilePosts();
getFollowers();
getFollowing();
checkIfFollowing();
}
checkIfFollowing() async {
DocumentSnapshot doc = await followersRef
.document(widget.profileId)
.collection('userFollowers')
.document(currentUserId)
.get();
setState(() {
isFollowing = doc.exists;
});
}
getFollowers() async {
QuerySnapshot snapshot = await followersRef
.document(widget.profileId)
.collection('userFollowers')
.getDocuments();
setState(() {
followerCount = snapshot.documents.length;
});
}
getFollowing() async {
QuerySnapshot snapshot = await followingRef
.document(widget.profileId)
.collection('userFollowing')
.getDocuments();
setState(() {
followingCount = snapshot.documents.length;
});
}
getProfilePosts() async {
setState(() {
isLoading = true;
});
QuerySnapshot snapshot = await postsRef
.document(widget.profileId)
.collection('userPosts')
.orderBy('rating', descending: true)
.getDocuments();
setState(() {
isLoading = false;
postCount = snapshot.documents.length;
posts = snapshot.documents.map((doc) => Post.fromDocument(doc)).toList();
});
}
Column buildCountColumn(String label, int count) {
return Column(
mainAxisSize: MainAxisSize.min,
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Text(
count.toString(),
style: TextStyle(fontSize: 22.0, fontWeight: FontWeight.bold),
),
Container(
margin: EdgeInsets.only(top: 4.0),
child: Text(
label,
style: TextStyle(
color: Colors.black,
fontSize: 15.0,
fontWeight: FontWeight.w400,
),
),
),
],
);
}
editProfile() {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) => EditProfile(currentUserId: currentUserId)));
}
Container buildButton({String text, Function function}) {
return Container(
padding: EdgeInsets.only(top: 2.0),
child: FlatButton(
onPressed: function,
child: Container(
width: 210.0,
height: 27.0,
child: Text(
text,
style: TextStyle(
color:
isFollowing ? Colors.white : Theme.of(context).primaryColor,
fontWeight: FontWeight.bold,
),
),
alignment: Alignment.center,
decoration: BoxDecoration(
color: isFollowing ? Theme.of(context).primaryColor : Colors.white,
border: Border.all(
color: Theme.of(context).primaryColor,
),
borderRadius: BorderRadius.circular(5.0),
),
),
),
);
}
buildProfileButton() {
bool isProfileOwner = currentUserId == widget.profileId;
if (isProfileOwner) {
return buildButton(
text: "Edit Profile",
function: editProfile,
);
} else if (isFollowing) {
return buildButton(
text: "Unfollow",
function: handleUnfollowUser,
);
} else if (!isFollowing) {
return buildButton(
text: "Follow",
function: handleFollowUser,
);
}
}
handleUnfollowUser() {
setState(() {
isFollowing = false;
});
followersRef
.document(widget.profileId)
.collection('userFollowers')
.document(currentUserId)
.get()
.then((doc) {
if (doc.exists) {
doc.reference.delete();
}
});
followingRef
.document(currentUserId)
.collection('userFollowing')
.document(widget.profileId)
.get()
.then((doc) {
if (doc.exists) {
doc.reference.delete();
}
});
activityFeedRef
.document(widget.profileId)
.collection('feedItems')
.document(currentUserId)
.get()
.then((doc) {
if (doc.exists) {
doc.reference.delete();
}
});
}
handleFollowUser() {
setState(() {
isFollowing = true;
});
followersRef
.document(widget.profileId)
.collection('userFollowers')
.document(currentUserId)
.setData({});
followingRef
.document(currentUserId)
.collection('userFollowing')
.document(widget.profileId)
.setData({});
activityFeedRef
.document(widget.profileId)
.collection('feedItems')
.document(currentUserId)
.setData({
"type": "follow",
"ownerId": widget.profileId,
"username": currentUser.username,
"userId": currentUserId,
"userProfileImg": currentUser.photoUrl,
"timestamp": timestamp,
});
}
buildProfileHeader() {
return FutureBuilder(
future: usersRef.document(widget.profileId).get(),
builder: (context, snapshot) {
if (!snapshot.hasData) {
return circularProgress();
}
User user = User.fromDocument(snapshot.data);
return Padding(
padding: EdgeInsets.all(16.0),
child: Column(
children: <Widget>[
Row(
children: <Widget>[
CircleAvatar(
radius: 40.0,
backgroundColor: Colors.grey,
backgroundImage: CachedNetworkImageProvider(user.photoUrl),
),
Expanded(
flex: 1,
child: Column(
children: <Widget>[
Row(
mainAxisSize: MainAxisSize.max,
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: <Widget>[
buildCountColumn("Videos", postCount),
buildCountColumn("Followers", followerCount),
buildCountColumn("Following", followingCount),
],
),
Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: <Widget>[buildProfileButton()],
),
],
),
),
],
),
Container(
alignment: Alignment.centerLeft,
padding: EdgeInsets.only(top: 12.0),
child: Text(
user.username,
style: TextStyle(
fontWeight: FontWeight.bold,
fontSize: 16.0,
),
),
),
Container(
alignment: Alignment.centerLeft,
padding: EdgeInsets.only(top: 4.0),
child: Text(
user.displayName,
style: TextStyle(
fontWeight: FontWeight.bold,
),
),
),
Container(
alignment: Alignment.centerLeft,
padding: EdgeInsets.only(top: 2.0),
child: Text(
user.bio,
),
),
],
),
);
},
);
}
buildProfilePosts() {
if (isLoading) {
return circularProgress();
} else if (posts.isEmpty) {
return Container(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
SvgPicture.asset('assets/images/no_content.svg', height: 260.0),
Padding(
padding: EdgeInsets.only(top: 20.0),
child: Text(
"No Posts",
style: TextStyle(
color: Colors.redAccent,
fontSize: 40.0,
fontWeight: FontWeight.bold),
),
),
],
),
);
}
return Column(
children: posts,
);
}
buildTogglePostOrientation() {
return Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: <Widget>[
IconButton(
icon: Icon(Icons.videocam,
size: 30.0, color: Theme.of(context).primaryColor),
onPressed: null,
),
],
);
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: header(context, titleText: "PROFILE"),
body: ListView(
children: <Widget>[
buildProfileHeader(),
Divider(),
buildTogglePostOrientation(),
Divider(
height: 0.0,
),
buildProfilePosts(),
],
),
);
}
}
The debug console says that: A non-null String must be provided to a Text widget. 'package:flutter/src/widgets/text.dart': Failed assertion: line 285 pos 10: 'data != null'
The relevant error-causing widget was FutureBuilder
