我是 flutter 和 graphQL 的新手,目前我正在将 mutations 集成到我的应用程序中。所以,我让服务器端使用模式中定义的一些自定义类型,但我不知道如何在 flutter 端指定它们。让我们看一些代码:
input DiaryGroupPermission {
groupId: Int!
permission: Int!
}
input DiaryInsideCommunity {
communityId: Int!
permissions: [DiaryGroupPermission]!
}
createDiary(community: DiaryInsideCommunity, description: String, title: String!): Diary
但是在客户端我不知道如何在突变中指定 DiaryInsideCommunity。 我试过这样的事情:
String createDiary = """
mutation CreateDiary(\$title: String!, \$description: String!, \$community: DiaryInsideCommunity) {
createDiary(
title: \$title,
description: \$description,
community: \$community
) {
id
}
)}""".replaceAll('\n', ' ');
并按如下方式传递我的 runMutation:
runMutation({
"title": _generalPage.title(),
"description": _generalPage.description(),
"community": {
"communityId": 1,
"permissions": _permissionPage.selectedGroups().map((group) {
return {
"groupId": group.id,
"permission": 1,
};
}).toList(),
}
});
有什么想法吗?在谷歌上找不到任何东西。
最佳答案
喜欢看到围绕 graphql_flutter 库创建的社区。p>
class DiaryGroupPermission {
int groupId;
int permission;
DiaryGroupPermission.fromJson(Map json)
: groupId = json['groupId'],
permission = json['permission'];
}
class DiaryInsideCommunity {
int communityId;
List<DiaryGroupPermission> permissions;
DiaryInsideCommunity.fromJson(Map json)
: communityId = json['communityId'],
permissions = json['permissions']
.map<DiaryGroupPermission>((Map permisionJson) =>
DiaryGroupPermission.fromJson(permisionJson))
.toList();
}
class Diary {
String body;
Diary(dynamic value) : body = value.toString();
}
typedef Diary createDiaryFunction(
DiaryInsideCommunity community, String description, String title);
DiaryInsideCommunity community = DiaryInsideCommunity.fromJson({
'communityId': 1,
'permissions': [
{'groupId': 1, 'permission': 1}
]
});
Diary mutation(DiaryInsideCommunity community,
{String description, @required String title}) =>
Diary(community.permissions[0].groupId);
Diary mutationResult = mutation(community, description: "a", title: "b");
我在 dart 中实现了您想要的类型,并创建了一个模型变异函数来向您展示如何调用它。
在 dart 中做类型没有更简单的方法。
来自这个库的创建者的欢呼,
我们
关于dart - Flutter/GraphQL - 以自定义类型作为参数的突变,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/53767176/