Question

有谁知道向apollo添加查询变量的正确方法是什么？如果我手动添加书名字符串而不是传入$name查询变量，我可以得到以下代码，但是只要我添加它并尝试通过propTypes中的选项传递name变量，Invariant Violation: The operation 'data' wrapping 'BookPage' is expecting a variable: 'name' but it was not found in the props passed to 'Apollo(BookPage)'

我直接从reactQL包中提取了装饰器的语法，所以我知道它比其他示例有更多的语法糖，但它仍然对查询有效吗？

const query = gql`
  query ($name: String!){
    bookByName(name: $name) {
      id
    }
}
`;

@graphql(query)
class BookPage extends React.PureComponent {
  static propTypes = {
    options: (props) => { return { variables: { name: "Quantum Mechanics"}}},
    data: mergeData({
      book:
        PropTypes.shape({
          id: PropTypes.string.isRequired,
        }),
    }),
  }

  render() {
    const { data } = this.props;
    if (data.loading) {
      return <p>Loading</p>
    }
    const { bookByName } = data;
    const book = bookByName;

    return (
      <p>book.id</p>
    );
  }
}

export default BookPage;

Answer 1

@graphql装饰器有第二个参数，您可以在其中定义查询或变异的选项。

与config中的选项定义类似。

所以在你的情况下它可能看起来像：

＆＃13;

const query = gql`
  query ($name: String!){
    bookByName(name: $name) {
      id
    }
}
`;

@graphql(query, {
  options: (ownProps) => ({
    variables: {
      name: ownProps.bookName // ownProps are the props that are added from the parent component
    },
  })})
class BookPage extends React.PureComponent {
  static propTypes = {
    bookName: PropTypes.string.isRequired,
    data: mergeData({
      book:
        PropTypes.shape({
          id: PropTypes.string.isRequired,
        }),
    }),
  }

  render() {
    const { data } = this.props;
    if (data.loading) {
      return <p>Loading</p>
    }
    const { bookByName } = data;
    const book = bookByName;

    return (
      <p>book.id</p>
    );
  }
}

export default BookPage;

＆＃13;

如何将graphQL查询变量传递到修饰的反应组件中

1 个答案: