How does it work?
Flutter SearchBox offers a performance focused searchbox UI widget to query and display results from your Elasticsearch cluster.
Usage
Basic Usage
import 'package:flutter/material.dart';
import 'package:searchbase/searchbase.dart';
import 'package:flutter_searchbox/flutter_searchbox.dart';
void main() {
runApp(FlutterSearchBoxApp());
}
class FlutterSearchBoxApp extends StatelessWidget {
// Avoid creating searchbase instance in build method
// to preserve state on hot reloading
final searchbaseInstance = SearchBase(
'good-books-ds',
'https://appbase-demo-ansible-abxiydt-arc.searchbase.io',
'a03a1cb71321:75b6603d-9456-4a5a-af6b-a487b309eb61',
appbaseConfig: AppbaseSettings(
recordAnalytics: true,
// Use unique user id to personalize the recent searches
userId: '[email protected]'));
FlutterSearchBoxApp({Key? key}) : super(key: key);
Widget build(BuildContext context) {
// The SearchBaseProvider should wrap your MaterialApp or WidgetsApp. This will
// ensure all routes have access to the store.
return SearchBaseProvider(
// Pass the searchbase instance to the SearchBaseProvider. Any ancestor `SearchWidgetConnector`
// widgets will find and use this value as the `SearchController`.
searchbase: searchbaseInstance,
child: MaterialApp(
title: "SearchBox Demo",
theme: ThemeData(
// ...
),
home: HomePage(),
),
);
}
}
class HomePage extends StatelessWidget {
HomePage();
// This widget is the root of your application.
Widget build(BuildContext context) {
return MaterialApp(
title: 'SearchBox Demo',
theme: ThemeData(
// ...
),
home: Scaffold(
appBar: AppBar(
actions: <Widget>[
IconButton(
icon: Icon(Icons.search),
onPressed: () {
// Invoke the Search Delegate to display search UI with autosuggestions
showSearch(
context: context,
// SearchBox widget from flutter searchbox
delegate: SearchBox(
// id: A unique identifier that can be used by other widgetss to reactively update data
id: 'search-widget',
size: 5,
dataField: [
{'field': 'original_title', 'weight': 1},
{'field': 'original_title.search', 'weight': 3}
],),
// Initialize query to persist suggestions for active search
query: SearchBaseProvider?.of(context)
.getSearchWidget('search-widget')
?.value
?.toString(),
);
}),
],
title: Text('SearchBox Demo'),
),
body: Center(
// A custom UI widget to render a list of results
child: SearchWidgetConnector(
id: 'result-widget',
dataField: 'original_title',
react: {
'and': ['search-widget'],
},
// ...other properties
),
),
);
}
}
Usage with All Props
SearchBox(
id: 'search-widget',
index: 'good-books-ds',
url: 'https://appbase-demo-ansible-abxiydt-arc.searchbase.io',
credentials: 'a03a1cb71321:75b6603d-9456-4a5a-af6b-a487b309eb61',
headers: {
"x-custom-header": "12345"
},
appbaseConfig: AppbaseSettings(
recordAnalytics: true,
userId: '[email protected]',
enableQueryRules: true,
),
type: QueryType.term
react:{
'and': ['test-widget'],
},
queryFormat: "or"
dataField: [
{'field': 'original_title', 'weight': 1},
{'field': 'original_title.search', 'weight': 3}
],
categoryField: "authors.keyword",
categoryValue: "John Doe",
nestedField: "settings",
from: 0,
size: 10,
sortBy: SortType.asc,
aggregationField: "authors.keyword",
aggregationSize: 10,
after: {
"authors.keyword": "Jerry Lovato"
},
includeNullValues: false,
includeFields: ["original_publication_year", "title", "authors"],
excludeFields: [""],
fuzziness: 1,
searchOperators: true,
highlight: true,
highlightField: "title",
customHighlight: {
"fields": {
"title": {}
},
"pre_tags": [
"<pre>"
],
"post_tags": [
"</pre>"
],
"require_field_match": false
},
interval: 1,
aggregations: ["max"],
showMissing: true,
missingLabel: "N/A",
defaultQuery: (SearchController searchController) =>(
{
"query":{
"match":{
"original_title":"harry potter"
}
},
"timeout":"1s"
}
),
customQuery: (SearchController searchController) =>(
{
"query":{
"term":{
"authors.keyword":"J.K. Rowling"
}
}
}
),
enableSynonyms: true,
selectAllLabel: "Paradise Lost", // works for term type of queries
pagination: true,
queryString: true,
enablePopularSuggestions: true,
maxPopularSuggestions: 3,
showDistinctSuggestions: true,
preserveResults: true,
clearOnQueryChange: true,
transformRequest: Future (Map request) =>
Future.value({
...request,
'credentials': 'include',
})
}
transformResponse: Future (Map elasticsearchResponse) async {
final ids = elasticsearchResponse['hits']['hits'].map(item => item._id);
final extraInformation = await getExtraInformation(ids);
final hits = elasticsearchResponse['hits']['hits'].map(item => {
final extraInformationItem = extraInformation.find(
otherItem => otherItem._id === item._id,
);
return Future.value({
...item,
...extraInformationItem,
};
}));
return Future.value({
...elasticsearchResponse,
'hits': {
...elasticsearchResponse.hits,
hits,
},
});
}
results: [
{
"_index": "good-books-ds",
"_type": "_doc",
"_id": "rT7tXXEBhDwVijd9RE6K",
"_score": 7.2774067,
"_source": {
"original_publication_year": 2016,
"title": "Hogwarts: An Incomplete and Unreliable Guide (Pottermore Presents, #3)",
"authors": "J.K. Rowling"
}
},
{
"_index": "good-books-ds",
"_type": "_doc",
"_id": "Sj7tXXEBhDwVijd9m1hJ",
"_score": 7.2774067,
"_source": {
"original_publication_year": 1998,
"title": "Harry Potter Boxset (Harry Potter, #1-7)",
"authors": "J.K. Rowling"
}
},
],
distinctField: 'authors.keyword',
distinctFieldConfig: {
'inner_hits': {
'name': 'other_books',
'size': 5,
'sort': [
{'timestamp': 'asc'}
],
},
'max_concurrent_group_searches': 4,
},
beforeValueChange: Future (value) {
// called before the value is set
// returns a [Future]
// update state or component props
return Future.value(value);
// or Future.error()
},
onValueChange: (next, {prev}){
// perform side-effects as value changes
},
onResults: (nextMap, {prevMap}){
// perform side-effects as results change
},
onAggregationData: (nextMap, {prevMap}){
// perform side-effects as aggregation data changes
},
onError: (error){
// handle error
},
onRequestStatusChange: (next, {prev}){
// listen to request status changes
},
onQueryChange: (nextQuery, {prevQuery}){
// listen to request query changes
},
enableRecentSearches: true,
showAutoFill: true,
buildSuggestionItem: (suggestion, handleTap){
// return custom ui for each suggestion
},
// For speechToTextInstance
/// import 'package:speech_to_text/speech_to_text.dart' as stt;
/// import 'package:speech_to_text/speech_to_text_provider.dart' as stp;
///
/// // Create the instance at top of your application.
/// final stp.SpeechToTextProvider speechToTextInstance =
/// stp.SpeechToTextProvider(stt.SpeechToText());
speechToTextInstance: speechToTextInstance,
micOptions: MicOptions({listenFor: 30, pauseFor: 10}),
customActions: [/* allows to define the additional actions at the right of search bar*/]
)API Reference
Check the complete API reference here.
Example
In this example, a basic search application is made that has a result widget reactively updating to the changes in the SearchBox widget.
import 'package:flutter/material.dart';
import 'package:searchbase/searchbase.dart';
import 'package:flutter_searchbox/flutter_searchbox.dart';
import 'package:speech_to_text/speech_to_text.dart' as stt;
import 'package:speech_to_text/speech_to_text_provider.dart' as stp;
void main() {
runApp(FlutterSearchBoxApp());
}
class FlutterSearchBoxApp extends StatelessWidget {
// Avoid creating searchbase instance in build method
// to preserve state on hot reloading
final searchbaseInstance = SearchBase(
'good-books-ds',
'https://appbase-demo-ansible-abxiydt-arc.searchbase.io',
'a03a1cb71321:75b6603d-9456-4a5a-af6b-a487b309eb61',
appbaseConfig: AppbaseSettings(
recordAnalytics: true,
// Use unique user id to personalize the recent searches
userId: '[email protected]'));
// Create an instance of speech to text provider at top level of your application
// It is only required to integrate voice search.
final stp.SpeechToTextProvider speechToTextInstance =
stp.SpeechToTextProvider(stt.SpeechToText());
FlutterSearchBoxApp({Key? key}) : super(key: key);
Widget build(BuildContext context) {
// The SearchBaseProvider should wrap your MaterialApp or WidgetsApp. This will
// ensure all routes have access to the store.
return SearchBaseProvider(
// Pass the searchbase instance to the SearchBaseProvider. Any ancestor `SearchWidgetConnector`
// widgets will find and use this value as the `SearchController`.
searchbase: searchbaseInstance,
child: MaterialApp(
title: "SearchBox Demo",
theme: ThemeData(
primarySwatch: Colors.blue,
visualDensity: VisualDensity.adaptivePlatformDensity,
),
home: HomePage(speechToTextInstance: speechToTextInstance),
),
);
}
}
class HomePage extends StatelessWidget {
final stp.SpeechToTextProvider? speechToTextInstance;
HomePage({this.speechToTextInstance});
// This widget is the root of your application.
Widget build(BuildContext context) {
return MaterialApp(
title: 'SearchBox Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
visualDensity: VisualDensity.adaptivePlatformDensity,
),
home: Scaffold(
appBar: AppBar(
actions: <Widget>[
IconButton(
icon: Icon(Icons.search),
onPressed: () {
// Invoke the Search Delegate to display search UI with autosuggestions
showSearch(
context: context,
// SearchBox widget from flutter searchbox
delegate: SearchBox(
// A unique identifier that can be used by other widgetss to reactively update data
id: 'search-widget',
enableRecentSearches: true,
enablePopularSuggestions: true,
showAutoFill: true,
maxPopularSuggestions: 3,
size: 5,
dataField: [
{'field': 'original_title', 'weight': 1},
{'field': 'original_title.search', 'weight': 3}
],
// pass the speech to text instance to enable voice search
speechToTextInstance: speechToTextInstance),
// Initialize query to persist suggestions for active search
query: SearchBaseProvider?.of(context)
.getSearchWidget('search-widget')
?.value
?.toString(),
);
}),
],
title: Text('SearchBox Demo'),
),
body: Center(
// A custom UI widget to render a list of results
child: SearchWidgetConnector(
id: 'result-widget',
dataField: 'original_title',
react: {
'and': ['search-widget'],
},
size: 10,
triggerQueryOnInit: true,
preserveResults: true,
builder: (context, searchController) =>
ResultsWidget(searchController)),
),
),
);
}
}
class ResultsWidget extends StatelessWidget {
final SearchController searchController;
ResultsWidget(this.searchController);
Widget build(BuildContext context) {
return Column(
children: [
Card(
child: Align(
alignment: Alignment.centerLeft,
child: Container(
color: Colors.white,
height: 20,
child: Text(
'${searchController.results!.numberOfResults} results found in ${searchController.results!.time.toString()} ms'),
),
),
),
Expanded(
child: ListView.builder(
itemBuilder: (context, index) {
WidgetsBinding.instance!.addPostFrameCallback((_) {
var offset = (searchController.from != null
? searchController.from
: 0)! +
(searchController.size ?? 0);
if (index == offset - 1) {
if ((searchController.results!.numberOfResults) > offset) {
// Load next set of results
searchController.setFrom(offset,
options: Options(triggerDefaultQuery: true));
}
}
});
return Container(
child: (index < searchController.results!.data.length)
? Container(
margin: const EdgeInsets.all(0.5),
padding: const EdgeInsets.fromLTRB(0, 15, 0, 0),
decoration: new BoxDecoration(
border: Border.all(color: Colors.black26)),
height: 200,
child: Row(
children: [
Expanded(
flex: 3,
child: Column(
children: [
Card(
semanticContainer: true,
clipBehavior: Clip.antiAliasWithSaveLayer,
child: Image.network(
searchController.results!.data[index]
["image_medium"],
fit: BoxFit.fill,
),
elevation: 5,
margin: EdgeInsets.all(10),
),
],
),
),
Expanded(
flex: 7,
child: Column(
children: [
Column(
children: [
SizedBox(
height: 110,
width: 280,
child: ListTile(
title: Tooltip(
padding: EdgeInsets.all(5),
height: 35,
textStyle: TextStyle(
fontSize: 15,
color: Colors.grey,
fontWeight:
FontWeight.normal),
decoration: BoxDecoration(
boxShadow: [
BoxShadow(
color: Colors.grey,
spreadRadius: 1,
blurRadius: 1,
offset: Offset(0, 1),
),
],
color: Colors.white,
),
message:
'By: ${searchController.results!.data[index]["original_title"]}',
child: Text(
searchController
.results!
.data[index][
"original_title"]
.length <
40
? searchController.results!
.data[index]
["original_title"]
: '${searchController.results!.data[index]["original_title"].substring(0, 39)}...',
style: TextStyle(
fontSize: 20.0,
),
),
),
subtitle: Tooltip(
padding: EdgeInsets.all(5),
height: 35,
textStyle: TextStyle(
fontSize: 15,
color: Colors.grey,
fontWeight:
FontWeight.normal),
decoration: BoxDecoration(
boxShadow: [
BoxShadow(
color: Colors.grey,
spreadRadius: 1,
blurRadius: 1,
offset: Offset(0, 1),
),
],
color: Colors.white,
),
message:
'By: ${searchController.results!.data[index]["authors"]}',
child: Text(
searchController
.results!
.data[index]
["authors"]
.length >
50
? 'By: ${searchController.results!.data[index]["authors"].substring(0, 49)}...'
: 'By: ${searchController.results!.data[index]["authors"]}',
style: TextStyle(
fontSize: 15.0,
),
),
),
isThreeLine: true,
),
),
Row(
children: [
Padding(
padding:
const EdgeInsets.fromLTRB(
25, 0, 0, 0),
),
Padding(
padding:
const EdgeInsets.fromLTRB(
10, 5, 0, 0),
child: Text(
'(${searchController.results!.data[index]["average_rating"]} avg)',
style: TextStyle(
fontSize: 12.0,
),
),
),
],
),
Row(
children: [
Padding(
padding:
const EdgeInsets.fromLTRB(
27, 10, 0, 0),
child: Text(
'Pub: ${searchController.results!.data[index]["original_publication_year"]}',
style: TextStyle(
fontSize: 12.0,
),
),
)
],
)
],
),
],
),
),
],
),
)
: (searchController.requestPending
? Center(child: CircularProgressIndicator())
: ListTile(
title: Center(
child: RichText(
text: TextSpan(
text:
searchController.results!.data.length >
0
? "No more results"
: 'No results found',
style: TextStyle(
color: Colors.black54,
fontSize: 20,
fontWeight: FontWeight.bold),
),
),
),
)));
},
itemCount: searchController.results!.data.length + 1,
),
),
],
);
}
}
