Meteor Flow Router setting up example.com/singlePostPage

Question

I can not manage to create the routes to show a single post with flowrouter and blaze in Meteor.

This is what I have so far which I am sure its mostly wrong!

publications.js

Meteor.publish('singlePost', function (postId) {
  return Posts.find({ _id: postId });
});

Router.js

FlowRouter.route("/posts/:_id", {
    name: "postPage",
    subscriptions: function (params, queryParams) {
     this.register('postPage', Meteor.subscribe('singlePost'));
 },
    action: function(params, queryParams) {
        BlazeLayout.render("nav", {yield: "postPage"} )
    }
});

singlePost.JS

Template.postPage.helpers({
  thisPost: function(){
    return Posts.findOne();
  }
});

singlePost.html

<template name="postPage">
  {{#with thisPost}}
    <li>{{title}}</li>
  {{/with}}
</template>

I used to do it back then with Iron router but now got confused with Flow router.

Answer 1

First don't use the FlowRouter subscriptions. That will soon be deprecated. Use Meteor PubSub. First in the routes.js:

    // http://app.com/posts/:_id
    FlowRouter.route('/posts/:id', {
        name: "postPage",
        action: function(params, queryParams) {
            BlazeLayout.render("nav", {yield: "postPage"} )
        }
    });

Then when the template is created you subscribe using Meteor's subscription:

// Template onCreated
Template.postPage.onCreated(function() {
    // Subscribe only the relevant subscription to this page
    var self = this;
    self.autorun(function() { // Stops all current subscriptions
        var id = FlowRouter.getParam('id'); // Get the collection id from the route parameter
        self.subscribe('singlePost', id); // Subscribe to the single entry in the collection with the route params id
    });
});

Then the helper will be:

// Template helper functions
Template.postPage.helpers({
    thisPost: function() {
        // Get the single entry from the collection with the route params id
        var id = FlowRouter.getParam('id');
        var post = Posts.findOne({ // Get the selected entry data from the collection with the given id.
            _id: id
        }) || {};
        return post;
    }
});

You also need to check if the subscriptions are ready in html.

{{#if Template.subscriptionsReady}}
    {{#with thisPost}}
        <li>{{title}}</li>
    {{/with}}
{{else}}
    <p>nothing to show</p>
{{/if}}