collection << item returns incorrect collection.count

[barriehadfield]

In poly-assoc3 branch:

class ExerciseType < ApplicationRecord
  has_many :exercise_types_user
  has_many :users, through: :exercise_types_user
end

class User < ApplicationRecord
  has_many :exercise_types_user
  has_many :exercise_types, through: :exercise_types_user
end

class ExerciseTypesUser < ApplicationRecord
  belongs_to :user
  belongs_to :exercise_type
end

# works perfectly:
user.exercise_types << exercise_type

# but here is the bug..
exercise_types.users.count
# returns a number higher than count + 1
# fine after a page refresh, so its just the client count which is not being updated correctly

[catmando]

@barriehadfield I think this got fixed with other stuff. I put in a test spec for it, and it passes. Can you verify that it is indeed working on edge, and if not, reopen.