Activerecord has_many :through through multiple models

Question

I\'m trying to access all comments from a given user with user.comments. The query is to go through two different models, which likely both return results. My r

Answer 1

Since we couldn't use has_many, through here because comments come from both of organisers and participants. I just think there are 2 solutions here:

Solution #1 Define comments method:

class User < ActiveRecord::Base
  def comments
    Comment.joins([{organiser: :user}, {participant: :user}])
           .where(users: {id: self.id})
  end
end

So then your query to find comments is:

User.first.comments

Solution #2 Use scope in Comment

class Comment < ActiveRecord::Base
  scope :from_user, -> (user) { 
    joins([{organiser: :user}, {participant: :user}]).where(users: {id: user.id}) 
  }
end

So your query will be like:

user = User.first
comments = Comment.from_user(user)