How can I know if my QuerySnapshot have some register? Flutter - flutter

Question

This is my code
return Scaffold(
body: CustomScrollView(
slivers: [
SliverAppBar(
pinned: true,
floating: true,
expandedHeight: 200.0,
title: AppAbar(),
flexibleSpace: FlexibleSpaceBar(
background: FlexibleAppBar(),
),
leading: Icon(Icons.menu, color: Colors.white, size: 30.0,),
),
SliverList(
delegate: SliverChildListDelegate(
List.generate(6, (idx) {
return Padding(
padding: const EdgeInsets.all(5.0),
child: Card(
shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(15.0)),
elevation: 3,
margin: EdgeInsets.symmetric(horizontal: 15),
child: Consumer<TimeSheetRepository>(
builder: (BuildContext context, TimeSheetRepository db, Widget child) {
_queryWeekYear = db.queryByMonthYear(
12, 2020);
return StreamBuilder(
stream: _queryWeekYear,
builder: (context, snapshot){
if(!snapshot.hasData || snapshot.data.documents == null) return CircularProgressIndicator();
return ListTile(
leading: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
Text('${_numWeeks[idx]}'),
],
),
title: Container(
height: MediaQuery.of(context).size.height/16,
child: ListView.builder(
scrollDirection: Axis.horizontal,
shrinkWrap: true,
itemCount: 7,
itemBuilder: (context, index) {
return Padding(
padding: const EdgeInsets.only(top: 20.0),
child: Column(
mainAxisAlignment: MainAxisAlignment.start,
children: [
Row(
children: [
Column(
children: [
Text('${(DateFormat('EEEE').format(firstweek[index]).substring(0, 1))}',style: TextStyle(fontSize: 12.0, color: Colors.black54)),
],
),
SizedBox(width: 28.0),
],
),
]
),
);
}
),
),
subtitle: Container(
height: MediaQuery.of(context).size.height/20,
child: ListView.builder(
scrollDirection: Axis.horizontal,
shrinkWrap: true,
itemCount: snapshot.data.documents.length,
itemBuilder: (context, index) {
DocumentSnapshot docSnapshot = snapshot.data.documents[index];
return Column(
mainAxisAlignment: MainAxisAlignment.start,
children: [
Row(
children: [
Column(
children: [
Text('${docSnapshot['date'].toString()}',style: TextStyle(fontSize: 12.0, color: Colors.black54)),
**// HERE I'M TRYING TO PUT THE DATE (IF EXISTS IN MY QUERY) BUT I NEED PUT IT IN THE CORRECT DAY IN MY CARD**
],
),
SizedBox(width: 28.0),
],
),
]
);
}
)
),
trailing: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
Container(
decoration: BoxDecoration(
color: Theme.of(context).primaryColorLight.withOpacity(0.2),
borderRadius: BorderRadius.circular(5.0),
),
child: Padding(
padding: const EdgeInsets.all(8.0),
child: Text( "148", style: TextStyle(color: Colors.blue.shade800, fontWeight: FontWeight.w500, fontSize: 18.0),
),
),
),
],
),
);
}
);
}
),
),
);
})
),
),
],
),
);
I built a card, inside I have a listview.buider making a days of the weeks, and I have my Stream with QuerySnapshot with some days. I'm trying to put in my widget day, the same day that I have in my QuerySnapshot.
How can I get a specify date from my query?
I did some changes, but doesn't works.
I need to find inside my QuerySnapshot if X day is there, if not continue next