我目前正在开发一个使用 Supabase 作为后端的 Flutter 项目。我正在尝试在 RPC(远程过程调用)函数上实现流以接收实时更新,但我遇到了问题。
我尝试使用 asStream() 方法,但它似乎没有按预期流式传输更改。有人可以指导我如何在 Flutter Supabase 中正确实现 RPC 函数的流式传输以接收实时更新吗?任何帮助或代码示例将不胜感激。谢谢!
代码在这里
Stream readSteam() {
return supabase
.rpc(
'read_guest_count',
params: {
'param_user_id': currentUuid,
},
)
.asStream()
.doOnDone(
() => print('Yes'),
);
}
小工具
StreamBuilder(
stream: _notificationDBController
.readNotificationCountSteamDB(),
builder: (context, snapshot) {
_notificationDBController.tempStream();
if (snapshot.connectionState == ConnectionState.waiting) {
// While waiting for data, display a loading indicator or placeholder
return Text(
'Loading...',
style: TextStyle(fontSize: 9),
);
} else if (snapshot.hasError) {
// If there's an error with the stream, display an error message
return Text(
'Error: ${snapshot.error}',
style: TextStyle(fontSize: 9),
);
} else {
// If the stream has data, display the data in the Text widget
final List<dynamic>? count =
snapshot.data as List<dynamic>?;
int totalGuests =
count![0]['total_guests'];
return Text(
'$totalGuests',
style: TextStyle(fontSize: 9),
);
}
},
)
这是给你的建议..
Stream<dynamic> readStream() {
return supabase
.rpc(
'read_guest_count',
params: {
'param_user_id': currentUuid,
},
)
.asStream();
}
SteamBuilder(
stream: readStream(),
builder:(context, snapshot) {
if (snapshot.connectionState == ConnectionState.waiting){
return Text(
'Loading...',
style: TextStyle(fontSize: 9),
);
} else if (snapshot.hasError) {
return Text(
'Error: ${snapshot.error}',
style: TextStyle(fontSize: 9),
);
} else {
final data = snapshot.data;
reutrn Text(
'$data',
style:TextStyle(fontSize: 9),
);
}
},
)
试试这个,我不是专家希望它会有所帮助