{"id":47909,"date":"2023-08-11T10:11:24","date_gmt":"2024-02-27T02:38:00","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e6%88%91%e6%89%93%e7%ae%97%e4%bd%bf%e7%94%a8hasura%e6%9d%a5%e5%ae%9e%e7%8e%b0graphql%e6%9c%8d%e5%8a%a1%e5%99%a8%e5%b9%b6%e5%88%b6%e4%bd%9c%e4%b8%80%e4%b8%aaflutter%e7%9a%84todo%e5%ba%94%e7%94%a8\/"},"modified":"2024-04-30T18:02:27","modified_gmt":"2024-04-30T10:02:27","slug":"%e6%88%91%e6%89%93%e7%ae%97%e4%bd%bf%e7%94%a8hasura%e6%9d%a5%e5%ae%9e%e7%8e%b0graphql%e6%9c%8d%e5%8a%a1%e5%99%a8%e5%b9%b6%e5%88%b6%e4%bd%9c%e4%b8%80%e4%b8%aaflutter%e7%9a%84todo%e5%ba%94%e7%94%a8","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e6%88%91%e6%89%93%e7%ae%97%e4%bd%bf%e7%94%a8hasura%e6%9d%a5%e5%ae%9e%e7%8e%b0graphql%e6%9c%8d%e5%8a%a1%e5%99%a8%e5%b9%b6%e5%88%b6%e4%bd%9c%e4%b8%80%e4%b8%aaflutter%e7%9a%84todo%e5%ba%94%e7%94%a8\/","title":{"rendered":"\u6211\u6253\u7b97\u4f7f\u7528Hasura\u6765\u5b9e\u73b0GraphQL\u670d\u52a1\u5668\u5e76\u5236\u4f5c\u4e00\u4e2aFlutter\u7684TODO\u5e94\u7528"},"content":{"rendered":"

\u4e2a\u4eba\u5bf9\u4e8e\u6700\u8fd1\u7684GraphQL\u5f88\u611f\u5174\u8da3\uff0c\u6240\u4ee5\u60f3\u5c1d\u8bd5\u5c06\u5176\u4e0eFlutter\u7ed3\u5408\u8d77\u6765\u505a\u4e9b\u4e8b\u60c5\u3002<\/p>\n

\u6211\u53d1\u73b0\u4e86\u8fd9\u7bc7\u6587\u7ae0\uff0c\u6240\u4ee5\u5728\u7a0d\u5fae\u4fee\u6539\u7684\u57fa\u7840\u4e0a\u521b\u5efa\u4e86\u4e00\u4e2a\u65b0\u7684\u7248\u672c\u3002
\n\u6211\u975e\u5e38\u53c2\u8003\u4e86\u8fd9\u7bc7\u6587\u7ae0\uff0c\u975e\u5e38\u611f\u8c22\uff01\u300aFlutter + GraphQL with Hasura \u2013 The GeekyAnts Blog\u300b\u3002<\/p>\n

\u4ee5\u4e0b\u662f\u4e00\u4e2aToDo\u5e94\u7528\u7a0b\u5e8f\u7684\u4ee3\u7801\u5e93\u94fe\u63a5\uff1ahttps:\/\/github.com\/shinbey221\/ToDo-App-with-Flutter<\/p>\n

Hasura\u548cPrisma<\/h2>\n

\u4e24\u8005\u5728\u5b9e\u73b0GraphQL\u65f6\u7ecf\u5e38\u91c7\u7528\u7684\u662fGraphQL Engine\uff0c\u4f46\u5176\u67b6\u6784\u662f\u4e0d\u540c\u7684\u3002<\/p>\n

Prisma\u662f\u4e00\u4e2a\u4e13\u4e3aGraphQL\uff08\u6216REST\uff09\u670d\u52a1\u5668\u8bbe\u8ba1\u7684GraphQL ORM\uff0c\u65e0\u6cd5\u76f4\u63a5\u4ece\u5ba2\u6237\u7aef\u8c03\u7528\u3002<\/p>\n

\u7531\u4e8eHasura\u53ef\u4ee5\u76f4\u63a5\u4ece\u5ba2\u6237\u7aef\u8c03\u7528\uff0c\u56e0\u6b64\u5b9e\u73b0\u8d77\u6765\u975e\u5e38\u65b9\u4fbf\u3002\u4f46\u662f\u5b83\u53ea\u9002\u7528\u4e8ePostgreSQL\u7684GraphQL\u670d\u52a1\u5668\u3002\u9002\u5408\u90a3\u4e9b\u60f3\u8981\u5feb\u901f\u5b9e\u65bd\u7684\u4eba\u3002<\/p>\n

Hasura\u5b9e\u73b0\u4e86GraphQL\u670d\u52a1\u5668\u3002<\/h2>\n

\u5728Heroku\u4e0a\u90e8\u7f72<\/h4>\n

\u9996\u5148\u6253\u5f00\u4ee5\u4e0bURL\uff1aInstant realtime GraphQL on Postgres | Hasura GraphQL Engine\u3002<\/p>\n

\u9009\u62e9Heroku\u514d\u8d39\u5957\u9910\u3002<\/p>\n

\"\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8<\/div>\n

\u539f\u6587\uff1a\u521b\u5efaPostgres\u8868\u683c\u5e76\u8f93\u5165\u6570\u636e\u3002<\/h4>\n

\u7ffb\u8bd1\uff1a\u521b\u5efaPostgres\u8868\u683c\u5e76\u586b\u5165\u6570\u636e\u3002<\/p>\n

\"\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8<\/div>\n

\u5f53\u60a8\u521b\u5efa\u6570\u636e\u8868\u540e\uff0c\u53ef\u4ee5\u8fd4\u56de\u5230GraphQL\u7684\u5934\u90e8\u83dc\u5355\uff0c\u7136\u540e\u5728\u5de6\u4fa7\u83dc\u5355\u4e2d\u9009\u62e9\u60a8\u521b\u5efa\u7684\u6570\u636e\u8868\u7684\u67e5\u8be2\u3001\u53d8\u66f4\u7b49\u64cd\u4f5c\u3002<\/p>\n

\"\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8<\/div>\n

\u521b\u5efa\u5ba2\u6237\u7aef\u7684Flutter\u5e94\u7528\u7a0b\u5e8f\u90e8\u5206<\/h2>\n

\u5728\u63a7\u5236\u53f0\u4e0a\u53ef\u4ee5\u5bf9\u6570\u636e\u8fdb\u884cCRUD\u64cd\u4f5c\uff0cGraphQL\u670d\u52a1\u5668\u7684\u51c6\u5907\u5df2\u7ecf\u5b8c\u6210\u3002
\n\u73b0\u5728\u6211\u4eec\u53ef\u4ee5\u5f00\u59cb\u521b\u5efa\u4e00\u4e2a\u5b9e\u9645\u7684\u5f85\u529e\u4e8b\u9879\u5e94\u7528\u7a0b\u5e8f\u3002<\/p>\n

\u9700\u8981\u8bbe\u5b9a<\/h4>\n

\u9996\u5148\u9700\u8981\u5b89\u88c5\u5fc5\u8981\u7684\u8f6f\u4ef6\u5305\u3002
\n\u5728pubspec.yaml\u6587\u4ef6\u4e2d\u6dfb\u52a0graphql_flutter | Flutter Package\u3002<\/p>\n

dependencies<\/span>:<\/span>\r\n  flutter<\/span>:<\/span>\r\n    sdk<\/span>:<\/span> flutter<\/span>\r\n  # The following adds the Cupertino Icons font to your application.<\/span>\r\n  # Use with the CupertinoIcons class for iOS style icons.<\/span>\r\n  cupertino_icons<\/span>:<\/span> ^0.1.2<\/span>\r\n  graphql_flutter<\/span>:<\/span> 1.0.0+4<\/span>\r\n<\/code><\/pre>\n
\u83b7\u53d6\u5305\u4ee5\u8fdb\u884c\u5b89\u88c5<\/p>\n
\u5c06graphql_flutter\u5bfc\u5165\u5230main.dart\u6587\u4ef6\u4e2d\u3002<\/p>\n
import<\/span> 'package:graphql_flutter\/graphql_flutter.dart'<\/span>;<\/span>\r\n<\/code><\/pre>\n
\u9700\u8981\u5c06\u6574\u4e2a\u5e94\u7528\u7a0b\u5e8f\u7528 GraphQlProvider \u5305\u88c5\u8d77\u6765\uff0c\u56e0\u6b64\u9700\u8981\u4fee\u6539 main \u5982\u4e0b\uff1a<\/p>\n
void<\/span> main<\/span>(<\/span>)<\/span> =><\/span> runApp<\/span>(<\/span>\r\n  GraphQLProvider<\/span>(<\/span>\r\n    child:<\/span> CacheProvider<\/span>(<\/span>\r\n      child:<\/span> MyApp<\/span>()<\/span>\r\n    ),<\/span>\r\n  )<\/span>\r\n);<\/span>\r\n<\/code><\/pre>\n
\u5728\u4e2d\u56fd\uff0c\u4f60\u53ef\u4ee5\u8fd9\u6837\u7ffb\u8bd1\uff1a<\/h4>\n
\u5ba2\u6237\u7aef\u7684GraphQL\u5b9a\u4e49<\/p>\n
\u521b\u5efa\u4e00\u4e2a\u7528\u4e8e\u5b9a\u4e49GraphQL\u5ba2\u6237\u7aef\u7684\u6587\u4ef6\u3002
\n\u5728lib\u76ee\u5f55\u4e0b\u521b\u5efa\u4e00\u4e2a\u540d\u4e3aservices\u7684\u6587\u4ef6\u5939\uff0c\u5e76\u5728\u5176\u4e2d\u521b\u5efa\u4e00\u4e2a\u540d\u4e3agraphQldata.dart\u7684\u6587\u4ef6\u3002<\/p>\n
\u5728 graphQldata.dart \u6587\u4ef6\u4e2d\uff0c\u9700\u8981\u5bfc\u5165\u5fc5\u8981\u7684\u5305\u5e76\u8fdb\u884c class \u5b9a\u4e49\u3002\u8bbe\u7f6e GraphQLServer \u7684\u7ec8\u7aef URL\uff0c\u5c06\u7ec8\u7aef URL \u548c\u7f13\u5b58\u8bbe\u7f6e\u4e3a\u5ba2\u6237\u7aef\u7684\u914d\u7f6e\uff0c\u5e76\u751f\u6210\u5ba2\u6237\u7aef\u5b9e\u4f8b\u3002<\/p>\n
graphQldata.dart \u7684\u610f\u601d\u662fGraphQl\u6570\u636e.dart\u3002<\/p>\n
import<\/span> 'package:flutter\/material.dart'<\/span>;<\/span>\r\nimport<\/span> 'package:graphql_flutter\/graphql_flutter.dart'<\/span>;<\/span>\r\n\r\nclass<\/span> GraphQlObject<\/span> {<\/span>\r\n  static<\/span> HttpLink<\/span> httpLink<\/span> =<\/span> HttpLink<\/span>(<\/span>\r\n    uri:<\/span> 'https:\/\/flutter-todo-app-hasura.herokuapp.com\/v1\/graphql'<\/span>,<\/span>\r\n  );<\/span>\r\n  static<\/span> Link<\/span> link<\/span> =<\/span> httpLink<\/span> as<\/span> Link<\/span>;<\/span>\r\n  ValueNotifier<\/span><<\/span>GraphQLClient<\/span>><\/span> client<\/span> =<\/span> ValueNotifier<\/span>(<\/span>\r\n    GraphQLClient<\/span>(<\/span>\r\n      cache:<\/span> InMemoryCache<\/span>(),<\/span>\r\n      link:<\/span> link<\/span>,<\/span>\r\n    ),<\/span>\r\n  );<\/span>\r\n}<\/span>\r\n\r\nGraphQlObject<\/span> graphQlObject<\/span> =<\/span> new<\/span> GraphQlObject<\/span>();<\/span>\r\n<\/code><\/pre>\n
\u4e3a\u4e86\u5bf9\u7531GraphQLServer\u751f\u6210\u7684\u8868\u8fdb\u884c\u64cd\u4f5c\uff0c\u8bbe\u7f6emutation\u548cquery\u3002<\/p>\n
graphQldata.dart\u53ef\u4ee5\u88ab\u91cd\u8ff0\u4e3a\uff1a<\/p>\n
\u56fe\u5f62\u67e5\u8be2\u6570\u636e.dart<\/p>\n
String<\/span> updateCompletedMutation<\/span>(<\/span>result<\/span>,<\/span> index<\/span>)<\/span> {<\/span>\r\n  return<\/span> (<\/span>\r\n      \"\"\"mutation ToggleTask{\r\n           update_todo(where: {\r\n            id: {_eq: <\/span>${result.data[\"todo\"][index][\"id\"]}<\/span>}},\r\n            _set: {isCompleted: <\/span>${!result.data[\"todo\"][index][\"isCompleted\"]}<\/span>}) {\r\n               returning {isCompleted } \r\n           }\r\n      }\"\"\"<\/span>\r\n  );<\/span>\r\n}<\/span>\r\n\r\nString<\/span> deleteTaskMutation<\/span>(<\/span>result<\/span>,<\/span> index<\/span>)<\/span> {<\/span>\r\n  return<\/span> (<\/span>\r\n      \"\"\"mutation DeleteTask{       \r\n            delete_todo(\r\n               where: {id: {_eq: <\/span>${result.data[\"todo\"][index][\"id\"]}<\/span>}}\r\n            ) { returning {id} }\r\n      }\"\"\"<\/span>\r\n  );<\/span>\r\n}<\/span>\r\n\r\nString<\/span> addTaskMutation<\/span>(<\/span>title<\/span>,<\/span> content<\/span>)<\/span> {<\/span>\r\n  print<\/span>(<\/span>title<\/span>);<\/span>\r\n  print<\/span>(<\/span>content<\/span>);<\/span>\r\n  return<\/span> (<\/span>\r\n      \"\"\"mutation AddTask{\r\n            insert_todo(objects: {content: \"<\/span>$content<\/span>\", isCompleted: false, title: \"<\/span>$title<\/span>\"}) {\r\n              returning {\r\n                id\r\n              }\r\n            }\r\n      }\"\"\"<\/span>\r\n  );<\/span>\r\n}<\/span>\r\n\r\nString<\/span> fetchQuery<\/span>(<\/span>)<\/span> {<\/span>\r\n  return<\/span> (<\/span>\r\n      \"\"\"query TodoGet{\r\n           todo {\r\n              title\r\n              content\r\n              isCompleted\r\n              id\r\n           }\r\n      } \"\"\"<\/span>\r\n  );<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
GraphQLObject\u7684\u914d\u7f6e<\/h4>\n
\u7531\u65bcGraphQL\u7684\u8a2d\u5b9a\u5df2\u5b8c\u6210\uff0c\u73fe\u5728\u9700\u8981\u5c07GraphQL\u7269\u4ef6\u8a2d\u7f6e\u5230main.dart\u7684GraphQLProvider\u4e2d\u3002<\/p>\n
import<\/span> 'package:todo_app_graphql\/services\/graphQldata.dart'<\/span>;<\/span>  \/\/ \u8ffd\u52a0<\/span>\r\n\r\nvoid<\/span> main<\/span>(<\/span>)<\/span> =><\/span> runApp<\/span>(<\/span>\r\n  GraphQLProvider<\/span>(<\/span>\r\n    client:<\/span> graphQlObject<\/span>.<\/span>client<\/span>,<\/span>  \/\/ \u8ffd\u52a0<\/span>\r\n    child:<\/span> CacheProvider<\/span>(<\/span>\r\n      child:<\/span> MyApp<\/span>()<\/span>\r\n    ),<\/span>\r\n  )<\/span>\r\n);<\/span>\r\n<\/code><\/pre>\n
\u5728Mutations\u4e2d\uff0c\u9700\u8981\u521d\u59cb\u5316GraphQLClient\u5bf9\u8c61\u4ee5\u66f4\u65b0\u6570\u636e\u5e93\u3002<\/p>\n
\u4e3b\u8981.dart<\/p>\n
class<\/span> _MyHomePageState<\/span> extends<\/span> State<\/span><<\/span>MyHomePage<\/span>><\/span> {<\/span>\r\n  GraphQLClient<\/span> client<\/span>;<\/span>\r\n  \/\/ This widget is the root of your application.<\/span>\r\n  initMethod<\/span>(<\/span>context<\/span>)<\/span> {<\/span>\r\n    client<\/span> =<\/span> GraphQLProvider<\/span>.<\/span>of<\/span>(<\/span>context<\/span>).<\/span>value<\/span>;<\/span>\r\n  }<\/span>\r\n\r\n  @override<\/span>\r\n  Widget<\/span> build<\/span>(<\/span>BuildContext<\/span> context<\/span>)<\/span> {<\/span>\r\n    WidgetsBinding<\/span>.<\/span>instance<\/span>.<\/span>addPostFrameCallback<\/span>((<\/span>_<\/span>)<\/span> =><\/span> initMethod<\/span>(<\/span>context<\/span>));<\/span>\r\n<\/code><\/pre>\n
\u6267\u884c\u67e5\u8be2<\/h4>\n
\u4ece\u8fd9\u91cc\u5f00\u59cb\u6267\u884c\u5b9e\u9645\u7684\u67e5\u8be2\uff0c\u5e76\u5c1d\u8bd5\u4ee5\u5217\u8868\u5f62\u5f0f\u663e\u793a\u63a5\u6536\u5230\u7684\u6570\u636e\u3002
\n\u4f7f\u7528\u67e5\u8be2\u7ec4\u4ef6(Query Widget)\u6765\u63a5\u6536\u67e5\u8be2\u3002<\/p>\n
return<\/span> Scaffold<\/span>(<\/span>\r\n      appBar:<\/span> AppBar<\/span>(<\/span>\r\n        title:<\/span> Text<\/span>(<\/span>widget<\/span>.<\/span>title<\/span>),<\/span>\r\n      ),<\/span>\r\n      body:<\/span> Center<\/span>(<\/span>\r\n        child:<\/span> Query<\/span>(<\/span>\r\n          options:<\/span> QueryOptions<\/span>(<\/span>document:<\/span> fetchQuery<\/span>(),<\/span> pollInterval:<\/span> 1<\/span>),<\/span>\r\n          builder:<\/span> (<\/span>QueryResult<\/span> result<\/span>,<\/span> {<\/span>VoidCallback<\/span> refetch<\/span>})<\/span> {<\/span>\r\n\r\n          }<\/span>\r\n        )<\/span>\r\n      )<\/span>\r\n)<\/span>\r\n<\/code><\/pre>\n
\u6267\u884c\u67e5\u8be2\u5e76\u83b7\u53d6\u6570\u636e<\/h4>\n
\u4f7f\u7528option\u6307\u5b9a\u5b9e\u73b0\u67e5\u8be2\uff0c\u5e76\u5c06builder\u63a5\u6536\u5230\u7684\u6570\u636e\u4f5c\u4e3a\u7ed3\u679c\u8fd4\u56de\u3002
\n\u4f7f\u7528\u8fd9\u4e2a\u7ed3\u679c\u6765\u663e\u793a\u6570\u636e\u5217\u8868\u3002<\/p>\n
\r\nif<\/span> (<\/span>result<\/span>.<\/span>data<\/span> ==<\/span> null<\/span>)<\/span> {<\/span>\r\n  return<\/span> Center<\/span>(<\/span>\r\n    child:<\/span> CircularProgressIndicator<\/span>(),<\/span>\r\n  );<\/span>\r\n}<\/span>\r\nreturn<\/span> ListView<\/span>.<\/span>builder<\/span>(<\/span>\r\n  itemCount:<\/span> result<\/span>.<\/span>data<\/span>[<\/span>\"todo\"<\/span>].<\/span>length<\/span>,<\/span>\r\n  itemBuilder:<\/span> (<\/span>BuildContext<\/span> context<\/span>,<\/span> int<\/span> index<\/span>)<\/span> {<\/span>\r\n    return<\/span> Card<\/span> (<\/span>\r\n      child:<\/span> Column<\/span>(<\/span>\r\n        mainAxisAlignment:<\/span> MainAxisAlignment<\/span>.<\/span>start<\/span>,<\/span>\r\n        mainAxisSize:<\/span> MainAxisSize<\/span>.<\/span>min<\/span>,<\/span>\r\n        children:<\/span> <<\/span>Widget<\/span>>[<\/span>\r\n          Row<\/span>(<\/span>\r\n            children:<\/span> <<\/span>Widget<\/span>>[<\/span>\r\n              Flexible<\/span>(<\/span>\r\n                child:<\/span> Container<\/span>(<\/span>\r\n                  height:<\/span> MediaQuery<\/span>.<\/span>of<\/span>(<\/span>context<\/span>).<\/span>size<\/span>.<\/span>height<\/span>\/<\/span>14.0<\/span>,<\/span>\r\n                  padding:<\/span> EdgeInsets<\/span>.<\/span>only<\/span>(<\/span>left:<\/span> 15.0<\/span>),<\/span>\r\n                  child:<\/span> Column<\/span>(<\/span>\r\n                    mainAxisAlignment:<\/span> MainAxisAlignment<\/span>.<\/span>spaceEvenly<\/span>,<\/span>\r\n                    crossAxisAlignment:<\/span> CrossAxisAlignment<\/span>.<\/span>start<\/span>,<\/span>\r\n                    children:<\/span> <<\/span>Widget<\/span>>[<\/span>\r\n                      Text<\/span>(<\/span>'Title'<\/span>,<\/span>style:<\/span> TextStyle<\/span>(<\/span>color:<\/span> Colors<\/span>.<\/span>grey<\/span>),),<\/span>\r\n                      Text<\/span>(<\/span>\r\n                        result<\/span>.<\/span>data<\/span>[<\/span>\"todo\"<\/span>][<\/span>index<\/span>][<\/span>\"title\"<\/span>],<\/span>\r\n                        overflow:<\/span> TextOverflow<\/span>.<\/span>ellipsis<\/span>,<\/span>\r\n                        style:<\/span> TextStyle<\/span>(<\/span>fontSize:<\/span> 17.0<\/span>),<\/span>\r\n                      ),<\/span>\r\n                    ],<\/span>\r\n                  ),<\/span>\r\n                ),<\/span>\r\n              ),<\/span>\r\n            ],<\/span>\r\n          ),<\/span>\r\n          Row<\/span>(<\/span>\r\n            children:<\/span> <<\/span>Widget<\/span>>[<\/span>\r\n              Flexible<\/span>(<\/span>\r\n                child:<\/span> Container<\/span>(<\/span>\r\n                  height:<\/span> MediaQuery<\/span>.<\/span>of<\/span>(<\/span>context<\/span>).<\/span>size<\/span>.<\/span>height<\/span>\/<\/span>14.0<\/span>,<\/span>\r\n                  padding:<\/span> EdgeInsets<\/span>.<\/span>only<\/span>(<\/span>left:<\/span> 15.0<\/span>),<\/span>\r\n                  child:<\/span> Column<\/span>(<\/span>\r\n                    mainAxisAlignment:<\/span> MainAxisAlignment<\/span>.<\/span>spaceEvenly<\/span>,<\/span>\r\n                    crossAxisAlignment:<\/span> CrossAxisAlignment<\/span>.<\/span>start<\/span>,<\/span>\r\n                    children:<\/span> <<\/span>Widget<\/span>>[<\/span>\r\n                      Text<\/span>(<\/span>'Content'<\/span>,<\/span>style:<\/span> TextStyle<\/span>(<\/span>color:<\/span> Colors<\/span>.<\/span>grey<\/span>),),<\/span>\r\n                      Text<\/span>(<\/span>\r\n                        result<\/span>.<\/span>data<\/span>[<\/span>\"todo\"<\/span>][<\/span>index<\/span>][<\/span>\"content\"<\/span>],<\/span>\r\n                        maxLines:<\/span> 2<\/span>,<\/span>\r\n                        overflow:<\/span> TextOverflow<\/span>.<\/span>ellipsis<\/span>,<\/span>\r\n                        style:<\/span> TextStyle<\/span>(<\/span>fontSize:<\/span> 15.0<\/span>),<\/span>\r\n                      ),<\/span>\r\n                    ],<\/span>\r\n                  ),<\/span>\r\n                ),<\/span>\r\n              ),<\/span>\r\n            ],<\/span>\r\n          ),<\/span>\r\n        ],<\/span>\r\n      ),<\/span>\r\n    );<\/span>\r\n  }<\/span>\r\n);<\/span>\r\n\r\n<\/code><\/pre>\n
\"Simulator<\/div>\n
\u4f7f\u7528Mutation\u6765\u8fdb\u884c\u65b0\u6570\u636e\u7684\u6ce8\u518c\u3001\u66f4\u65b0\u548c\u5220\u9664\u3002<\/h4>\n
\u4f7f\u7528\u67e5\u8be2\u53ef\u4ee5\u5217\u51fa\u6570\u636e\u5e93\u4e2d\u7684\u6570\u636e\u3002
\n\u63a5\u4e0b\u6765\uff0c\u5c06\u4f7f\u7528Mutation\u6765\u751f\u6210\u3001\u5220\u9664\u548c\u66f4\u65b0\u65b0\u6570\u636e\u3002
\n\u9996\u5148\uff0c\u5b9e\u73b0\u751f\u6210\u65b0\u6570\u636e\u7684\u529f\u80fd\u3002<\/p>\n
\u6839\u636e\u8f93\u5165\u7684\u5185\u5bb9\u751f\u6210\u65b0\u6570\u636e\u7684\u5904\u7406\u65b9\u5f0f\u5982\u4e0b\u6240\u793a\u3002<\/p>\n
await<\/span> client<\/span>.<\/span>mutate<\/span>(<\/span>\r\n  MutationOptions<\/span>(<\/span>\r\n    document:<\/span> addTaskMutation<\/span>(<\/span>\r\n        titleController<\/span>.<\/span>text<\/span>,<\/span> contentController<\/span>.<\/span>text<\/span>),<\/span>\r\n  ),<\/span>\r\n);<\/span>\r\n<\/code><\/pre>\n
\u5f53\u6309\u4e0b\u6d6e\u52a8\u6309\u94ae\u65f6\uff0c\u5b9e\u73b0\u5f39\u51fa\u5bf9\u8bdd\u6846\u7684\u529f\u80fd\u3002<\/p>\n
floatingActionButton:<\/span> FloatingActionButton<\/span>(<\/span>\r\n  heroTag:<\/span> \"Tag\"<\/span>,<\/span>\r\n  onPressed:<\/span> ()<\/span> {<\/span>\r\n    showDialog<\/span>(<\/span>\r\n        context:<\/span> context<\/span>,<\/span>\r\n        builder:<\/span> (<\/span>BuildContext<\/span> context1<\/span>)<\/span> {<\/span>\r\n          return<\/span> AlertDialog<\/span>(<\/span>\r\n            shape:<\/span> RoundedRectangleBorder<\/span>(<\/span>borderRadius:<\/span> BorderRadius<\/span>.<\/span>all<\/span>(<\/span>Radius<\/span>.<\/span>circular<\/span>(<\/span>8.0<\/span>))),<\/span>\r\n            title:<\/span> Text<\/span>(<\/span>\"Add task\"<\/span>),<\/span>\r\n            content:<\/span> Container<\/span>(<\/span>\r\n              width:<\/span> 500.0<\/span>,<\/span>\r\n              child:<\/span> Form<\/span>(<\/span>\r\n                  child:<\/span> Column<\/span>(<\/span>\r\n                      mainAxisSize:<\/span> MainAxisSize<\/span>.<\/span>min<\/span>,<\/span>\r\n                      children:<\/span> <<\/span>Widget<\/span>>[<\/span>\r\n                        TextField<\/span>(<\/span>\r\n                          controller:<\/span> titleController<\/span>,<\/span>\r\n                          decoration:<\/span> InputDecoration<\/span>(<\/span>labelText:<\/span> \"Title\"<\/span>),<\/span>\r\n                        ),<\/span>\r\n                        TextFormField<\/span>(<\/span>\r\n                          maxLines:<\/span> 10<\/span>,<\/span>\r\n                          controller:<\/span> contentController<\/span>,<\/span>\r\n                          decoration:<\/span> InputDecoration<\/span>(<\/span>labelText:<\/span> \"Coentent\"<\/span>),<\/span>\r\n                        ),<\/span>\r\n                        Center<\/span>(<\/span>\r\n                            child:<\/span> Padding<\/span>(<\/span>\r\n                                padding:<\/span> const<\/span> EdgeInsets<\/span>.<\/span>only<\/span>(<\/span>top:<\/span> 10.0<\/span>),<\/span>\r\n                                child:<\/span> RaisedButton<\/span>(<\/span>\r\n                                    elevation:<\/span> 7<\/span>,<\/span>\r\n                                    shape:<\/span> RoundedRectangleBorder<\/span>(<\/span>\r\n                                      borderRadius:<\/span> BorderRadius<\/span>.<\/span>circular<\/span>(<\/span>12<\/span>),<\/span>\r\n                                    ),<\/span>\r\n                                    color:<\/span> Colors<\/span>.<\/span>black<\/span>,<\/span>\r\n                                    onPressed:<\/span> ()<\/span> async<\/span> {<\/span>\r\n                                      await<\/span> client<\/span>.<\/span>mutate<\/span>(<\/span>\r\n                                        MutationOptions<\/span>(<\/span>\r\n                                          document:<\/span> addTaskMutation<\/span>(<\/span>\r\n                                              titleController<\/span>.<\/span>text<\/span>,<\/span> contentController<\/span>.<\/span>text<\/span>),<\/span>\r\n                                        ),<\/span>\r\n                                      );<\/span>\r\n                                      Navigator<\/span>.<\/span>pop<\/span>(<\/span>context<\/span>);<\/span>\r\n                                      titleController<\/span>.<\/span>text<\/span> =<\/span> \"\"<\/span>;<\/span>\r\n                                      contentController<\/span>.<\/span>text<\/span> =<\/span> \"\"<\/span>;<\/span>\r\n                                    },<\/span>\r\n                                    child:<\/span> Text<\/span>(<\/span>\r\n                                      \"Add\"<\/span>,<\/span>\r\n                                      style:<\/span> TextStyle<\/span>(<\/span>color:<\/span> Colors<\/span>.<\/span>white<\/span>),<\/span>\r\n                                    )<\/span>\r\n                                )<\/span>\r\n                            )<\/span>\r\n                        )<\/span>\r\n                      ]<\/span>\r\n                  )<\/span>\r\n              ),<\/span>\r\n            )<\/span>\r\n          );<\/span>\r\n        }<\/span>\r\n     );<\/span>\r\n  },<\/span>\r\n  child:<\/span> Icon<\/span>(<\/span>Icons<\/span>.<\/span>add<\/span>),<\/span>\r\n),<\/span>\r\n<\/code><\/pre>\n
\"Simulator<\/div>\n
\u5728\u63a5\u4e0b\u6765\u7684\u6b65\u9aa4\u4e2d\uff0c\u6211\u4eec\u5c06\u5b9e\u65bd\u5220\u9664\u548c\u66f4\u65b0\u64cd\u4f5c\u3002
\n\u6211\u4eec\u5c06\u5728\u5361\u7247\u5143\u7d20\u4e2d\u589e\u52a0\u590d\u9009\u6846\u548c\u5220\u9664\u56fe\u6807\u3002<\/p>\n
final<\/span> TextEditingController<\/span> titleController<\/span> =<\/span> new<\/span> TextEditingController<\/span>();<\/span>\r\nfinal<\/span> TextEditingController<\/span> contentController<\/span> =<\/span> new<\/span> TextEditingController<\/span>();<\/span>\r\n\r\nreturn<\/span> Card<\/span> (<\/span>\r\n      child:<\/span> Column<\/span>(<\/span>\r\n        mainAxisAlignment:<\/span> MainAxisAlignment<\/span>.<\/span>start<\/span>,<\/span>\r\n        mainAxisSize:<\/span> MainAxisSize<\/span>.<\/span>min<\/span>,<\/span>\r\n        children:<\/span> <<\/span>Widget<\/span>>[<\/span>\r\n          Row<\/span>(<\/span>\r\n            children:<\/span> <<\/span>Widget<\/span>>[<\/span>\r\n              Flexible<\/span>(<\/span>\r\n                child:<\/span> Container<\/span>(<\/span>\r\n                  height:<\/span> MediaQuery<\/span>.<\/span>of<\/span>(<\/span>context<\/span>).<\/span>size<\/span>.<\/span>height<\/span>\/<\/span>14.0<\/span>,<\/span>\r\n                  padding:<\/span> EdgeInsets<\/span>.<\/span>only<\/span>(<\/span>left:<\/span> 15.0<\/span>),<\/span>\r\n                  child:<\/span> Column<\/span>(<\/span>\r\n                    mainAxisAlignment:<\/span> MainAxisAlignment<\/span>.<\/span>spaceEvenly<\/span>,<\/span>\r\n                    crossAxisAlignment:<\/span> CrossAxisAlignment<\/span>.<\/span>start<\/span>,<\/span>\r\n                    children:<\/span> <<\/span>Widget<\/span>>[<\/span>\r\n                      Text<\/span>(<\/span>'Title'<\/span>,<\/span>style:<\/span> TextStyle<\/span>(<\/span>color:<\/span> Colors<\/span>.<\/span>grey<\/span>),),<\/span>\r\n                      Text<\/span>(<\/span>\r\n                        result<\/span>.<\/span>data<\/span>[<\/span>\"todo\"<\/span>][<\/span>index<\/span>][<\/span>\"title\"<\/span>],<\/span>\r\n                        overflow:<\/span> TextOverflow<\/span>.<\/span>ellipsis<\/span>,<\/span>\r\n                        style:<\/span> TextStyle<\/span>(<\/span>fontSize:<\/span> 17.0<\/span>),<\/span>\r\n                      ),<\/span>\r\n                    ],<\/span>\r\n                  ),<\/span>\r\n                ),<\/span>\r\n              ),<\/span>\r\n            ],<\/span>\r\n          ),<\/span>\r\n          Row<\/span>(<\/span>\r\n            children:<\/span> <<\/span>Widget<\/span>>[<\/span>\r\n              Flexible<\/span>(<\/span>\r\n                child:<\/span> Container<\/span>(<\/span>\r\n                  height:<\/span> MediaQuery<\/span>.<\/span>of<\/span>(<\/span>context<\/span>).<\/span>size<\/span>.<\/span>height<\/span>\/<\/span>14.0<\/span>,<\/span>\r\n                  padding:<\/span> EdgeInsets<\/span>.<\/span>only<\/span>(<\/span>left:<\/span> 15.0<\/span>),<\/span>\r\n                  child:<\/span> Column<\/span>(<\/span>\r\n                    mainAxisAlignment:<\/span> MainAxisAlignment<\/span>.<\/span>spaceEvenly<\/span>,<\/span>\r\n                    crossAxisAlignment:<\/span> CrossAxisAlignment<\/span>.<\/span>start<\/span>,<\/span>\r\n                    children:<\/span> <<\/span>Widget<\/span>>[<\/span>\r\n                      Text<\/span>(<\/span>'Content'<\/span>,<\/span>style:<\/span> TextStyle<\/span>(<\/span>color:<\/span> Colors<\/span>.<\/span>grey<\/span>),),<\/span>\r\n                      Text<\/span>(<\/span>\r\n                        result<\/span>.<\/span>data<\/span>[<\/span>\"todo\"<\/span>][<\/span>index<\/span>][<\/span>\"content\"<\/span>],<\/span>\r\n                        maxLines:<\/span> 2<\/span>,<\/span>\r\n                        overflow:<\/span> TextOverflow<\/span>.<\/span>ellipsis<\/span>,<\/span>\r\n                        style:<\/span> TextStyle<\/span>(<\/span>fontSize:<\/span> 15.0<\/span>),<\/span>\r\n                      ),<\/span>\r\n                    ],<\/span>\r\n                  ),<\/span>\r\n                ),<\/span>\r\n              ),<\/span>\r\n            ],<\/span>\r\n          ),<\/span>\r\n          \/\/ \u8ffd\u52a0<\/span>\r\n          Row<\/span>(<\/span>\r\n            mainAxisAlignment:<\/span> MainAxisAlignment<\/span>.<\/span>end<\/span>,<\/span>\r\n            children:<\/span> <<\/span>Widget<\/span>>[<\/span>\r\n              Checkbox<\/span>(<\/span>\r\n                value:<\/span> result<\/span>.<\/span>data<\/span>[<\/span>\"todo\"<\/span>][<\/span>index<\/span>][<\/span>\"isCompleted\"<\/span>],<\/span>\r\n                onChanged:<\/span> (<\/span>bool<\/span> value<\/span>)<\/span> {<\/span>\r\n\r\n                 },<\/span>\r\n              ),<\/span>\r\n              IconButton<\/span>(<\/span>\r\n                icon:<\/span> Icon<\/span>(<\/span>Icons<\/span>.<\/span>delete<\/span>),<\/span>\r\n                onPressed:<\/span> ()<\/span> {<\/span>\r\n\r\n                },<\/span>\r\n              ),<\/span>\r\n            ],<\/span>\r\n          ),<\/span>\r\n        ],<\/span>\r\n      ),<\/span>\r\n    );<\/span>\r\n<\/code><\/pre>\n
\u5c06\u524a\u9664\u6309\u94ae\u7684onPressed\u6539\u4e3a\u4ee5\u4e0b\u65b9\u5f0f<\/p>\n
onPressed:<\/span> ()<\/span> async<\/span>{<\/span>\r\n  await<\/span> client<\/span>.<\/span>mutate<\/span>(<\/span>\r\n    MutationOptions<\/span>(<\/span>\r\n      document:<\/span> deleteTaskMutation<\/span>(<\/span>\r\n          result<\/span>,<\/span> index<\/span>),<\/span>\r\n    ),<\/span>\r\n  );<\/span>\r\n},<\/span>\r\n<\/code><\/pre>\n
\u5c06\u590d\u9009\u6846\u7684onChanged\u5c5e\u6027\u8bbe\u7f6e\u4e3a\u4ee5\u4e0b\u5185\u5bb9\u3002<\/p>\n
onChanged:<\/span> ()<\/span> async<\/span> {<\/span>\r\n  await<\/span> client<\/span>.<\/span>mutate<\/span>(<\/span>\r\n    MutationOptions<\/span>(<\/span>\r\n      document:<\/span> changeCompletedMutation<\/span>(<\/span>\r\n          result<\/span>,<\/span> index<\/span>),<\/span>\r\n    ),<\/span>\r\n  );<\/span>\r\n},<\/span>\r\n<\/code><\/pre>\n
\u6bcf\u4e2a\u90fd\u53d1\u51faMutation\u6765\u5220\u9664\u548c\u66f4\u65b0\u6570\u636e\u3002\u8fd9\u6837\uff0cToDo\u5e94\u7528\u7a0b\u5e8f\u5c31\u5b8c\u6210\u4e86\u3002<\/p>\n
\u603b\u7ed3<\/h1>\n
\u6211\u5728\u8fd9\u6b21\u4f7f\u7528 Hasura \u5b9e\u73b0 GraphQL \u670d\u52a1\u5668\u65f6\u5c1d\u8bd5\u4e86\u4e00\u4e0b\uff0c\u53d1\u73b0\u5728\u63a7\u5236\u53f0\u4e0a\u8f7b\u677e\u64cd\u4f5c API \u771f\u7684\u5f88\u65b9\u4fbf\u3002
\nPrisma \u4f5c\u4e3a\u4e00\u79cd\u7c7b\u4f3c ORM \u7684\u5de5\u5177\uff0c\u5728\u73af\u5883\u642d\u5efa\u65b9\u9762\u53ef\u80fd\u4f1a\u6709\u4e9b\u9ebb\u70e6\uff0c\u4f46\u662f\u5b83\u80fd\u591f\u63d0\u4f9b\u66f4\u591a\u7684\u81ea\u5b9a\u4e49\u9009\u9879\uff0c\u6240\u4ee5\u5982\u679c\u4f60\u60f3\u8981\u8ba4\u771f\u5b9e\u73b0\u670d\u52a1\u5668\u7aef\u7684\u529f\u80fd\uff0c\u6211\u8ba4\u4e3a\u7528 Prisma \u4f1a\u66f4\u597d\u3002<\/p>\n
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