如何从 schema.graphql 生成查询和变异字符串导出

Question

我正在构建一个 flutter 应用程序并使用 amplify_flutter 0.2.1 并放大 v5.1.0 ，当我从 Amplify-admin UI 中拉出项目时，它会生成一个 graphQL 模式 schema.graphql，这在前端是无用的，因为为了获取或修改文档，每次我们需要编写像这样的 graphQL 查询文档：

String graphQLDocument =
        '''mutation CreateTodo($name: String!, $description: String) {
              createTodo(input: {name: $name, description: $description}) {
                id
                name
                description
              }
        }''';

    var operation = Amplify.API.mutate(
        request: GraphQLRequest<String>(document: graphQLDocument, variables: {
      'name': 'my first todo',
      'description': 'todo description',
    }));

Amplify Flutter official CRUD Doc

我想这样写：

const input = {
name,
description

};
const output = {
id,name,description
};
var graphQLDoc = createToDO(input,output); // it should return the string object according to the input and output passed.

    var operation = Amplify.API.mutate(
        request: GraphQLRequest<String>(document: graphQLDoc, variables: {
      'name': 'my first todo',
      'description': 'todo description',
    }));

或者可以这样推进：

const input = {
name:"hackrx",
description: "this works cool"

};
const output = {
id,name,description
};
var graphQLQueryRes = await createToDO(input,output); // it should return the whole fetched object according to the output passed.

Answer 1

你可以按照我在代码中使用的方式进行操作：

String myMutation(name, description) {
var graphQLDocument = '''mutation CreateTodo {
   createTodo(input: {name: $name, description: $description}) {
      id
      name
      description
      }
   }
   ''';
return graphQLDocument;  
}

var operation = Amplify.API.mutate(
      request:
          GraphQLRequest<String>(document: myMutation('john', 'doe')));

获得回复：你可以运行 amplify codegen models 在终端中根据你的 schema.graphql table 生成数据模型。之后，您可以这样做：例如，您有一个用户 table

User.fromJson(operation.response.data['createToDo]);

现在您有一个用户 class 的对象。

如何从 schema.graphql 生成查询和变异字符串导出

How to generate queries and mutation string export from schema.graphql

flutter

graphql

aws-amplify

flutteramplify