relay.js

relay.js

class CreateCommentMutation extends Relay.Mutation {
  static fragments = {
    story: () => Relay.QL`
      fragment on Story { id }
    `,
  };
  getMutation() {
    return Relay.QL`
      mutation{ createComment }
    `;
  }
  getFatQuery() {
    return Relay.QL`
      fragment on CreateCommentPayload { 
        story { comments },
      }
    `;
  }
  getConfigs() {
    return [{
      type: 'FIELDS_CHANGE',
      fieldIDs: { story: this.props.story.id },
    }];
  }
  getVariables() {
    return { text: this.props.text };
  }
}

class Comment extends React.Component {
  render() {
    var {id, text} = this.props.comment;
    return <li key={id}>{text}</li>;
  }
}
Comment = Relay.createContainer(Comment, {
  fragments: {
    comment: () => Relay.QL`
      fragment on Comment {
        id,
        text,
      }
    `,
  },
});

class Story extends React.Component {
  _handleSubmit = (e) => {
    e.preventDefault();
    Relay.Store.update(
      new CreateCommentMutation({
        story: this.props.story,
        text: this.refs.newCommentInput.value,
      })
    );
    this.refs.newCommentInput.value = '';
  }
  render() {
    var {comments} = this.props.story;
    return (
      <form onSubmit={this._handleSubmit}>
        <h1>Breaking News</h1>
        <p>The peanut is neither a pea nor a nut.</p>
        <strong>Discuss:</strong>
        <ul>
          {comments.map(
            comment => <Comment comment={comment} />
          )}
        </ul>
        <input
          placeholder="Weigh in&hellip;"
          ref="newCommentInput"
          type="text"
        />
      </form>
    );
  }
}
Story = Relay.createContainer(Story, {
  fragments: {
    story: () => Relay.QL`
      fragment on Story {
        comments {
          ${Comment.getFragment('comment')},
        },
        ${CreateCommentMutation.getFragment('story')},
      }
    `,
  },
});

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

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