Styjun

when i run this code it shows an error that correct scopedmodel was not found. i think we have to declare another scoped model for
bottomsheet,dialogs also did that using with same model but it behaving abnormally. how do i achive that how to use scoped models in such bottom sheets and dialogs.

i was noob at scoped model
any help apreciated

 import 'package:flutter/material.dart';
 import 'package:scoped_model/scoped_model.dart';
 import 'package:cloud_firestore/cloud_firestore.dart';


 class ResourcesModel extends Model
 String selectsubject = 'Select the subject';
 List<String> sublist=[];
 change(int index)
 debugPrint('$sublist[index]');
 selectsubject=sublist[index];
 notifyListeners();
 
 fetchsubjects() 
 Firestore.instance.collection("resources").document("17csea").get().then((DocumentSnapshot ds)
 for (var item in ds['subjects']) 
 sublist.add(item);
 
 notifyListeners();
 );
 
 

 class Resources extends StatelessWidget 
 final ResourcesModel resourcesModel =ResourcesModel();

 void showbottomsheet(context) async
 double height =MediaQuery.of(context).size.height;
 await showModalBottomSheet(
 context: context,
 builder: (context)
 return Container(
 height: height/2,
 child: ScopedModelDescendant<ResourcesModel>(
 builder:(context,_,model) 
 debugPrint('helelel');
 return (model.sublist.isEmpty)?Center(child:CircularProgressIndicator()):
 ListView.separated(
 itemCount: model.sublist.length,
 separatorBuilder: (context,_)
 return Divider(
 color: Theme.of(context).primaryColor,
 );
 ,
 itemBuilder: (context,index)
 return ListTile(
 title: Text(model.sublist[index]),
 onTap: model.change(index),
 );
 ,
 );
 
 ),
 );
 
 );
 
 @override
 Widget build(BuildContext context) 
 return ScpedModel<ResourcesModel>(
 model:resourcesmodel,
 chilld:ScopedModelDescendant<ResourcesModel>(

 builder:(context,_,model) 
 return Container(
 color: Color(0xFFF3F3F3),
 child: RaisedButton(
 child: Text(model.selectsubject),
 onPressed: ()
 if(resourcesModel.sublist.isEmpty)
 resourcesModel.fetchsubjects();
 
 ,
 ),
 );
 
 ),
 ); 
 
 

Scoped Model when wrapped this to a page then it only applicable to that page only.
bottom sheets and dialogs in flutter nothing but creating new context i.e a new page so either we have to wrap on top of the material app or wrap another scoped model on bottom sheet with same model. that should work. and in Ur code U have that onpressed calling a fuction in a model i think so.
then the model builds again and again so change it to like this

onpressed:()
call funtion;
pop;

i think it may be helpful for some might be

At the root of your app you need to start it using. This allows you to use the ScopedModelDescendent widgets lower down in the tree.

ScopedModel<AppModel>(
 model: AppModel(),
 child: Resources())

Wherever you're displaying your Resources from make sure it's wrapped like above then you'll be able to use that model lower in your tree.