Finding user total votes recieved on posts by other users

问题

I'm using this gem for comments: https://github.com/lml/commontator

Which is setup to easily plug into this gem to vote on the comments: https://github.com/ryanto/acts_as_votable

I'm using rails 4 btw, which is compatible with both gems.

In my User model:

class User < ActiveRecord::Base
  acts_as_voter
  acts_as_commentator
  has_many :comments
end

In my Comment model:

class Comment < ActiveRecord::Base
  acts_as_votable
  belongs_to :user
end

Everything seems to be working fine. But when trying to calculate a users total votes (the total votes received on all comments by the user) (karma)

<%= @user.votes.count %>

I get this error

undefined method `votes' for #<User:0x0000010dbf23a0>

So I tried this:

<%= @user.comments.map{|c| c.votes.count}.inject(:+) %>

Which resulted in another error:

SQLite3::SQLException: no such column: commontator_comments.commontator_id: SELECT "commontator_comments".* FROM "commontator_comments"  WHERE "commontator_comments"."commontator_id" = ? AND "commontator_comments"."commontator_type" = ?

I've tried:

@user.find_voted_items.count

and

@user.get_voted(Comment).count ? 

and

@user.comments.collect{|c| c.votes.size}.inject(:+)

Nothing seems to work. I'm guessing it has to do with the way the commontator gem is handling the proxy associations relationship. How do I render the total number of votes received on all comments by a particular user? Any help is very much appreciated!

Edit: I did run all the migrations.

回答1:

Shouldn't you be counting votes on the comments? The User model acts_as_voter so, according to the docs on the gem, you can retrieve a list of the items a user has voted on with find_voted_items, but the Comment model is the one where you can count votes since that's what the user is voting on.

Edit, given the comments. At it's simplest, you probably need something similar to this:

sum = 0
@user.comments.each do |comment|
    sum += comment.votes.count
end

though you can probably make that a bit more eloquent with inject or even with Activerecord#sum on the votes field with a carefully constructed "where clause".

来源：https://stackoverflow.com/questions/21781269/finding-user-total-votes-recieved-on-posts-by-other-users