RelayJS:如何通过props设置initialVariables

Question

假设我有一个GraphQL类型Echo,它可以回显我用一些装饰查询的内容.另一方面,我有一个React组件,echo message传递给它,其中一些装饰由Echo类型决定.如何设置initialVariables的Echo组成部分？

我读了设置道具集initialVariables,但是这不起作用.我试过了componentDidMount,但那也行不通.

此中继操场显示消息未正确显示.

对于上下文,

// This component consumes `Echo` type
class Echo extends React.Component {
  componentDidMount() {
    let {relay, message} = this.props; 

    relay.setVariables({
      message
    });
  }

  render() {
    let name = '';
    if (this.props.echo) {
      name = this.props.echo.name;
    }

    return (
      <li>Message: {name}</li>
    );
  }
}

Echo = Relay.createContainer(Echo, {
  // By default `message` is null
  initialVariables: {
    message: null
  },

  fragments: {
    echo: () => Relay.QL`
      fragment on Echo {
        name(message: $message)
      }
    `,
  },
});

这是使用echo解析的类型

let EchoType = new GraphQLObjectType({
  name: 'Echo',
  fields: () => ({
    name: {
      type: GraphQLString,
      args: {
        message: {
          type: GraphQLString
        }
      },
      resolve: (echo, {message}) => `Hello, ${message}!`
    }
  })
});

Answer 1

我承认我对Relay一无所知,但message传递给Echo它的属性似乎正在影响它(或以其他方式影响它).我做了以下更改:

1. 将传递的道具名称更改为Echo:

   <Echo echo={this.props.viewer.echo} defaultMessage="Default"/>
   

2. 更改属性名称componentDidMount:

   componentDidMount() {
     let {relay, defaultMessage} = this.props; 
   
     relay.setVariables({
       message: defaultMessage
     });
   }
   

以下是完整的源代码(以及指向工作示例的链接):

class Echo extends React.Component {
  componentDidMount() {
    let {relay, defaultMessage} = this.props; 

    relay.setVariables({
      message: defaultMessage
    });
  }

  render() {
    let name = '';
    if (this.props.echo) {
      name = this.props.echo.name;
    }

    return (
      <li>Message: {name}</li>
    );
  }
}
Echo = Relay.createContainer(Echo, {
  initialVariables: {
    message: ""
  },
  fragments: {
    echo: () => Relay.QL`
      fragment on Echo {
        name(message: $message)
      }
    `,
  },
});

class EchoApp extends React.Component {
  render() {
    return <ul>
      <Echo echo={this.props.viewer.echo} defaultMessage="Default"/>
    </ul>;
  }
}
EchoApp = Relay.createContainer(EchoApp, {
  fragments: {
    viewer: () => Relay.QL`
      fragment on Viewer {
        echo { ${Echo.getFragment('echo')} },
      }
    `,
  },
});

class EchoRoute extends Relay.Route {
  static routeName = 'Home';
  static queries = {
    viewer: (Component) => Relay.QL`
      query {
        viewer { ${Component.getFragment('viewer')} },
      }
    `,
  };
}

ReactDOM.render(
  <Relay.RootContainer
    Component={EchoApp}
    route={new EchoRoute()}
  />,
  mountNode
);