So I get the following error whenever I sign in through Google, but I only get it on my first login. If I log out and log back in, it never appears and the app works fine.
======== Exception caught by widgets library =======================================================
The following StateError was thrown building:
Bad state: field does not exist within the DocumentSnapshotPlatform
When the exception was thrown, this was the stack:
#0 DocumentSnapshotPlatform.get._findKeyValueInMap (package:cloud_firestore_platform_interface/src/platform_interface/platform_interface_document_snapshot.dart:87:7)
#1 DocumentSnapshotPlatform.get._findComponent (package:cloud_firestore_platform_interface/src/platform_interface/platform_interface_document_snapshot.dart:105:23)
#2 DocumentSnapshotPlatform.get (package:cloud_firestore_platform_interface/src/platform_interface/platform_interface_document_snapshot.dart:121:12)
#3 _JsonDocumentSnapshot.get (package:cloud_firestore/src/document_snapshot.dart:92:48)
#4 _JsonDocumentSnapshot.[] (package:cloud_firestore/src/document_snapshot.dart:96:40)
#5 _HomeState.chatRoomsList.<anonymous closure>.<anonymous closure> (package:connectlyapp/views/home.dart:58:45)
#6 SliverChildBuilderDelegate.build (package:flutter/src/widgets/sliver.dart:456:22)
#7 SliverMultiBoxAdaptorElement._build (package:flutter/src/widgets/sliver.dart:1214:28)
#8 SliverMultiBoxAdaptorElement.createChild.<anonymous closure> (package:flutter/src/widgets/sliver.dart:1227:55)
#9 BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:2573:19)
#10 SliverMultiBoxAdaptorElement.createChild (package:flutter/src/widgets/sliver.dart:1220:12)
#11 RenderSliverMultiBoxAdaptor._createOrObtainChild.<anonymous closure> (package:flutter/src/rendering/sliver_multi_box_adaptor.dart:349:23)
#12 RenderObject.invokeLayoutCallback.<anonymous closure> (package:flutter/src/rendering/object.dart:1968:59)
#13 PipelineOwner._enableMutationsToDirtySubtrees (package:flutter/src/rendering/object.dart:916:15)
#14 RenderObject.invokeLayoutCallback (package:flutter/src/rendering/object.dart:1968:14)
#15 RenderSliverMultiBoxAdaptor._createOrObtainChild (package:flutter/src/rendering/sliver_multi_box_adaptor.dart:338:5)
#16 RenderSliverMultiBoxAdaptor.addInitialChild (package:flutter/src/rendering/sliver_multi_box_adaptor.dart:422:5)
#17 RenderSliverList.performLayout (package:flutter/src/rendering/sliver_list.dart:79:12)
#18 RenderObject.layout (package:flutter/src/rendering/object.dart:1858:7)
#19 RenderSliverEdgeInsetsPadding.performLayout (package:flutter/src/rendering/sliver_padding.dart:137:12)
#20 RenderSliverPadding.performLayout (package:flutter/src/rendering/sliver_padding.dart:371:11)
#21 RenderObject.layout (package:flutter/src/rendering/object.dart:1858:7)
#22 RenderViewportBase.layoutChildSequence (package:flutter/src/rendering/viewport.dart:510:13)
#23 RenderShrinkWrappingViewport._attemptLayout (package:flutter/src/rendering/viewport.dart:1923:12)
#24 RenderShrinkWrappingViewport.performLayout (package:flutter/src/rendering/viewport.dart:1881:20)
#25 RenderObject.layout (package:flutter/src/rendering/object.dart:1858:7)
#26 RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:116:14)
#27 RenderObject.layout (package:flutter/src/rendering/object.dart:1858:7)
#28 RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:116:14)
#29 RenderObject.layout (package:flutter/src/rendering/object.dart:1858:7)
#30 RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:116:14)
#31 RenderObject.layout (package:flutter/src/rendering/object.dart:1858:7)
#32 RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:116:14)
#33 RenderObject.layout (package:flutter/src/rendering/object.dart:1858:7)
#34 RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:116:14)
#35 RenderObject.layout (package:flutter/src/rendering/object.dart:1858:7)
#36 RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:116:14)
#37 RenderObject.layout (package:flutter/src/rendering/object.dart:1858:7)
#38 RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:116:14)
#39 RenderObject.layout (package:flutter/src/rendering/object.dart:1858:7)
#40 RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:116:14)
#41 RenderCustomPaint.performLayout (package:flutter/src/rendering/custom_paint.dart:545:11)
#42 RenderObject.layout (package:flutter/src/rendering/object.dart:1858:7)
#43 RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:116:14)
#44 RenderObject.layout (package:flutter/src/rendering/object.dart:1858:7)
#45 ChildLayoutHelper.layoutChild (package:flutter/src/rendering/layout_helper.dart:56:11)
#46 RenderFlex._computeSizes (package:flutter/src/rendering/flex.dart:829:43)
#47 RenderFlex.performLayout (package:flutter/src/rendering/flex.dart:931:32)
#48 RenderObject.layout (package:flutter/src/rendering/object.dart:1858:7)
#49 _RenderSingleChildViewport.performLayout (package:flutter/src/widgets/single_child_scroll_view.dart:581:14)
#50 RenderObject.layout (package:flutter/src/rendering/object.dart:1858:7)
#51 RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:116:14)
#52 RenderObject.layout (package:flutter/src/rendering/object.dart:1858:7)
#53 RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:116:14)
#54 RenderObject.layout (package:flutter/src/rendering/object.dart:1858:7)
#55 RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:116:14)
#56 RenderObject.layout (package:flutter/src/rendering/object.dart:1858:7)
#57 RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:116:14)
#58 RenderObject.layout (package:flutter/src/rendering/object.dart:1858:7)
#59 RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:116:14)
#60 RenderObject.layout (package:flutter/src/rendering/object.dart:1858:7)
#61 RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:116:14)
#62 RenderObject.layout (package:flutter/src/rendering/object.dart:1858:7)
#63 RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:116:14)
#64 RenderObject.layout (package:flutter/src/rendering/object.dart:1858:7)
#65 RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:116:14)
#66 RenderCustomPaint.performLayout (package:flutter/src/rendering/custom_paint.dart:545:11)
#67 RenderObject.layout (package:flutter/src/rendering/object.dart:1858:7)
#68 RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:116:14)
#69 RenderObject.layout (package:flutter/src/rendering/object.dart:1858:7)
#70 RenderPadding.performLayout (package:flutter/src/rendering/shifted_box.dart:233:12)
#71 RenderObject.layout (package:flutter/src/rendering/object.dart:1858:7)
#72 MultiChildLayoutDelegate.layoutChild (package:flutter/src/rendering/custom_layout.dart:171:12)
#73 _ScaffoldLayout.performLayout (package:flutter/src/material/scaffold.dart:1097:7)
#74 MultiChildLayoutDelegate._callPerformLayout (package:flutter/src/rendering/custom_layout.dart:240:7)
#75 RenderCustomMultiChildLayoutBox.performLayout (package:flutter/src/rendering/custom_layout.dart:404:14)
#76 RenderObject._layoutWithoutResize (package:flutter/src/rendering/object.dart:1713:7)
#77 PipelineOwner.flushLayout (package:flutter/src/rendering/object.dart:885:18)
#78 RendererBinding.drawFrame (package:flutter/src/rendering/binding.dart:453:19)
#79 WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:883:13)
#80 RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:319:5)
#81 SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1143:15)
#82 SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1080:9)
#83 SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:996:5)
#87 _invoke (dart:ui/hooks.dart:166:10)
#88 PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:270:5)
#89 _drawFrame (dart:ui/hooks.dart:129:31)
(elided 3 frames from dart:async)
====================================================================================================
This is the code that the error pops up on:
Widget chatRoomsList() {
return StreamBuilder<dynamic>(
stream: chatRoomsStream,
builder: (context, snapshot) {
return snapshot.hasData
? ListView.builder(
itemCount: snapshot.data.docs.length,
shrinkWrap: true,
itemBuilder: (context, index) {
DocumentSnapshot ds = snapshot.data.docs[index];
return ChatRoomListTile(ds["lastMessage"], ds.id, myUserName);
})
: Center(child: CircularProgressIndicator());
},
);
}
What this snippet of code does is fetch chatrooms that the logged in user has interacted with, on the main page. Sort of like a Messenger Home screen. But if a new user logs in (who has no chatrooms or existing chats with any other user), the main screen should show no results.
What am I doing wrong here? I had a similar problem with my search feature on the same app, and I fixed it by putting in return Streambuilder, but here - that doesn't fix the Bad state error.
The main screen works fine if I log out and log back in, it displays the users I chatted with and their previous/last sent messages.
Kindly help me out here.
EDIT: getChatRooms() [where chatRoomsStream is initialized]:
getChatRooms() async {
chatRoomsStream = await DatabaseMethods().getChatRooms();
setState(() {});
}
DatabaseMethods().getChatRooms() [database.dart method]:
Future<Stream<QuerySnapshot>> getChatRooms() async {
String myUsername = await SharedPreferenceHelper().getUserName();
return FirebaseFirestore.instance
.collection("chatrooms")
.where("users", arrayContains: myUsername)
.snapshots();
}
CodePudding user response：
I believe the issue is in this line
return ChatRoomListTile(ds["lastMessage"], ds.id, myUserName);
try changing this line to ds.data()['lastMessage']
return ChatRoomListTile(ds.data()['lastMessage'], ds.id, myUserName);
Code that worked for me
final usersRef = FirebaseFirestore.instance.collection('users');
final userDocs = await usersRef.get();
final docId =
userDocs.docs.where((doc) => doc.data()['uid'] == user.uid).first.id;
Please lemme know in comments if you any issues, will be glad to help you.
CodePudding user response：
You should use doc.data() but once you use it you will get an error saying operator[] isn't defined for the type Object. That's because in recent version of firestore Document is a generic type and you must also give a type along with it example
DocumentSnapshot<Map<String,dynamic>>
if you don't give any type like this - DocumentSnapshot .The type is inferred as an Object type that doesn't suppose to have "[]" operator defined.
Please look at these two answers for more details- https://stackoverflow.com/a/63501611/6051666 https://stackoverflow.com/a/69447502/6051666