Question

我正在尝试使用Apollo查询GraphQl API。我正在用打字稿在React中做到这一点，但我无法让Query组件停止抛出错误。我是整个组合的新手，所以我可能在做某些明显错误的事情。有什么想法吗？

这是错误：

Type '{ children: (string | (({ loading, error, data }: QueryResult<any, OperationVariables>) => any))[]; query: any; }' is not assignable to type 'Pick<Readonly<QueryProps<any, OperationVariables>> & Readonly<{ children?: ReactNode; }>, "children" | "displayName" | "skip" | "onCompleted" | "onError" | "ssr" | "variables" | ... 6 more ... | "partialRefetch">'.
  Types of property 'children' are incompatible.
    Type '(string | (({ loading, error, data }: QueryResult<any, OperationVariables>) => any))[]' is not assignable to type '((result: QueryResult<any, OperationVariables>) => ReactNode) | (((result: QueryResult<any, OperationVariables>) => ReactNode) & string) | (((result: QueryResult<any, OperationVariables>) => ReactNode) & number) | ... 4 more ... | (((result: QueryResult<...>) => ReactNode) & ReactPortal)'.
      Type '(string | (({ loading, error, data }: QueryResult<any, OperationVariables>) => any))[]' is not assignable to type '((result: QueryResult<any, OperationVariables>) => ReactNode) & ReactNodeArray

这是我的代码：

import React from 'react';
import gql from "graphql-tag";
import { Query } from "react-apollo";


export interface LoginProps { 
    data: object; item: string; query: object; loading: string; error: string;
 };

 const getLogin =
    gql`
        {
        viewer {
            login
            }
        }
    `;

export class Test extends React.Component<LoginProps, {}> { 
    <Query query={getLogin}>
            {({ loading, error, data }) => {
                if (loading) return <p>Loading...</p>;
                if (error) return <p>Error!</p>;

                return data.viewer.map( item => {
                    <div key={item.login}>
                        <p>{item.login}</p>
                    </div>
                });
            }};
    </Query>
};

export default Test;

Answer 1

首先，由于您没有在组件上使用状态，因此建议您使用React.FunctionComponent而不是React.Component。

关于您的问题：您必须在组件的渲染功能内使用jsx组件，例如：

export class Test extends React.Component<LoginProps, {}> {
  // HERE: use the render method
  render() {
    return (
      <Query query={getLogin}>
        {({ loading, error, data }) => {
          if (loading) return <p>Loading...</p>;
          if (error) return <p>Error!</p>;

          return data.viewer.map(item => {
            <div key={item.login}>
              <p>{item.login}</p>
            </div>;
          });
        }}
        ;
      </Query>
    );
  }
}

希望有帮助。

Answer 2

显然无关紧要，但是对于那些来这里寻找答案的人来说，Query内部的解构就像这样：

    <Query query={getLogin}>
        {(result: QueryResult) => {
          const { loading, error, data } = result;

            // ...rest here
            if (loading) return <p>Loading...</p>;
            if (error) return <p>Error!</p>;

            return data.viewer.map( item => {
                <div key={item.login}>
                    <p>{item.login}</p>
                </div>
            });
        }};
</Query>

尝试将React Apollo Query组件用于带有打字稿的GraphQL查询导致错误

2 个答案: