Meteor Routing and subsequent data order - mongodb

Question

I got stuck at understanding Meteor Routes and data flow.
In the beginning it was simple blog app, with 1 collection named Posts.
Now I want to store history of changes, so I've created a second collection and named it History.
On every edit in Posts I'm adding state of post (author,content, etc ...) to History including the ID of edited post.
Question is how should I configure Iron Router to make it pass the current post id to posts/:_id/history from previous state (posts/:_id/) and get entries from History with this matching ID?

Answer 1

To pass the id from one view to the next, you can do it via template like so:
<a href="/posts/1/history>Post History</a>
or
<a href="/posts/{{_id}}/history>Post History</a>
or programmatically like so:
Router.go('postHistory', {_id: 1});
To get the history entries, you can resolve the data in iron router during the route request as so:
this.route('postHistory', {
path: '/posts/:_id/history',
data: function() {
return History.findOne({postId: this.params._id});
}
});

Answer 2

Without seeing your code it is hard to tell what you have tried already. But in order to help you understand Meteor routes perhaps you could take a look at these two links:
This introduction to routes with Iron Router
This link on more advanced routes
These should help you comprehend how to make two collections work together.