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using valuekeys for keeping track of mounts in query & mutations

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QueryBuilder & MutaionBuilder are now null proof
This commit is contained in:
Kingkor Roy Tirtho
2022-06-20 12:28:37 +06:00
parent 7d337e02da
commit d7635abb0e
9 changed files with 134 additions and 56 deletions
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packages/fl_query/lib/query_builder.dart
+28 -18
View File
@@ -1,6 +1,7 @@
import 'package:fl_query/models/query_job.dart';
import 'package:fl_query/query.dart';
import 'package:fl_query/query_bowl.dart';
import 'package:fl_query/utils.dart';
import 'package:flutter/widgets.dart';
class QueryBuilder<T extends Object, Outside> extends StatefulWidget {
@@ -32,54 +33,63 @@ class QueryBuilder<T extends Object, Outside> extends StatefulWidget {
class _QueryBuilderState<T extends Object, Outside>
extends State<QueryBuilder<T, Outside>> {
late QueryBowl queryBowl;
late final ValueKey<String> uKey;
late Query<T, Outside> query;
@override
void initState() {
super.initState();
uKey = ValueKey<String>(uuid.v4());
query = Query<T, Outside>.fromOptions(
widget.job,
externalData: widget.externalData,
);
WidgetsBinding.instance.addPostFrameCallback((_) async {
queryBowl = QueryBowl.of(context);
await queryBowl.fetchQuery<T, Outside>(
widget.job,
externalData: widget.externalData,
query = QueryBowl.of(context).addQuery<T, Outside>(
query,
key: uKey,
onData: widget.onData,
onError: widget.onError,
mount: widget,
);
await query.fetch();
});
}
@override
void didUpdateWidget(covariant oldWidget) {
if (oldWidget.externalData != widget.externalData) {
queryBowl = QueryBowl.of(context);
// clearing up the old widget before adding the new updated one
// so unmounted zombie widgets don't get piled up
queryBowl.getQuery(widget.job.queryKey)?.unmount(oldWidget);
queryBowl.fetchQuery(
QueryBowl.of(context).fetchQuery(
widget.job,
externalData: widget.externalData,
onData: widget.onData,
onError: widget.onError,
mount: widget,
key: uKey,
);
} else {
if (oldWidget.onData != widget.onData && oldWidget.onData != null) {
query.onDataListeners.remove(oldWidget.onData);
if (widget.onData != null) query.onDataListeners.add(widget.onData!);
}
if (oldWidget.onError != widget.onError && oldWidget.onError != null) {
query.onErrorListeners.remove(oldWidget.onError);
if (widget.onError != null) query.onErrorListeners.add(widget.onError!);
}
}
super.didUpdateWidget(oldWidget);
}
@override
void dispose() {
final query = queryBowl.getQuery(widget.job.queryKey);
query?.unmount(widget);
if (widget.onData != null) query?.onDataListeners.remove(widget.onData);
if (widget.onError != null) query?.onErrorListeners.remove(widget.onError);
query.unmount(uKey);
if (widget.onData != null) query.onDataListeners.remove(widget.onData);
if (widget.onError != null) query.onErrorListeners.remove(widget.onError);
super.dispose();
}
@override
Widget build(BuildContext context) {
queryBowl = QueryBowl.of(context);
final query = queryBowl.getQuery<T, Outside>(widget.job.queryKey);
if (query == null) return Container();
return widget.builder(context, query);
final latestQuery = queryBowl.getQuery<T, Outside>(query.queryKey) ?? query;
return widget.builder(context, latestQuery);
}
}