resusable-meteor-data.js

// with-post.js
import {withData} from 'meteor/orionsoft:react-meteor-data'
import {Meteor} from 'meteor/meteor'
import Posts from './posts'

export default withData(({postId}) => {
  Meteor.subscribe('post', postId)
  const post = Posts.findOne(postId)
  return {post}
})

// with-author.js
import {withData} from 'meteor/orionsoft:react-meteor-data'
import {Meteor} from 'meteor/meteor'
import Authors from './authors'

export default withData(({post}) => {
  if (!post) return {}
  Meteor.subscribe('author', post.authorId)
  const author = Authors.findOne(itemId)
  return {author}
})

// my-component.js
import React from 'react'
import withPost from './with-post.js'
import withAuthor from './with-author.js'

@withPost
@withAuthor
export default class Component extends React.Component {

  render () {
    if (!this.props.post || !this.props.author) return <span>Loading...</span>
    return (
      <div>
        {this.props.post.title} by {this.props.author.name}
      </div>
    )
  }

}