Feature - support count unique

[rantav]

It would be nice and useful to support a count of uniques across a specified field in the collection documents (or to be able to provide a uniqueId function that accepts a document and returns its unique ID for the sake of this count).

Is this BTW perhaps already supported?...

Example:

Counts.publish(this, 'unique-name-of-counter', 
    Posts.find(), 
    {uniqueField: 'referrerId'});

// or: 

Counts.publish(this, 'unique-name-of-counter', 
    Posts.find(), 
    {uniqueFunction: function(post){
      return post.referrerId + '-' + post.userId;
    });

[tmeasday]

Hi @rantav - that seems like an interesting idea, although difficult to implement as we don't currently track any properties of our counted documents (except implicitly through the observer).

I think implementing such a feature would probably increase the complexity of the package quite a bit so I'm not sure it makes sense, given the package is pretty simple right now. If you wanted to put a PR together to do it, I'd happily take a look however.

[javaknight]

This is just an idea, but you may be able to achieve this using the newest version of Meteor and the rawConnection and rawCollection methods, which have access to distinct.

[rantav]

It can be done at first load, but how to keep it reactive, as new documents
are added? (Without having to keep a state on the node server)
On Apr 8, 2015 5:02 PM, "javaknight" notifications@github.com wrote:

This is just an idea, but you may be able to achieve this using the newest
version of Meteor and the rawConnection and rawCollection methods, which
have access to distinct.

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