ActiveRecord Query User Lesson UserLesson - ruby-on-rails

Question

I am trying to display the number of UserLesson.where(user_id: current_user_id) in the provided view (profiles_controller.rb). At the moment it displays the total UserLesson and not to individual user.
Here is my view:
<% #user.lectures.each do |lecture| %>
<div class="col-md-4 margin-s mb-60">
<div class="lecture-box">
<%= image_tag lecture.picture.url(:medium) %>
<%= lecture.lessons.size %>
<%= lecture.lessons.total_lesson %> #SHOULD BE HERE
<p class="pad5"><%= truncate(lecture.description, length: 80) %> </p>
<%= link_to "Start Now", lecture, class: "btn btn-primary" %>
</div> <!-- .lecture-box -->
</div> <!-- .col-md-4 -->
<% end %>
Here is my lesson.rb:
class Lesson < ActiveRecord::Base
has_one :lecture, through: :chapter
belongs_to :chapter
has_many :user_lessons
def self.total_lesson
Lesson.joins(:user_lessons).size
end
end
Other Models:
class UserLesson < ActiveRecord::Base
belongs_to :user
belongs_to :lesson
# validates_uniqueness_of :user_lesson, :scope => [:user, :lesson]
end
class Lesson < ActiveRecord::Base
has_one :lecture, through: :chapter
belongs_to :chapter
end
class User < ActiveRecord::Base
has_many :enrollments
has_many :user_lessons
has_many :lectures, through: :enrollments
accepts_nested_attributes_for :enrollments
end
class Enrollment < ActiveRecord::Base
belongs_to :user
belongs_to :lecture
validates :lecture, uniqueness: { scope: :user, message: "should happen once per user" }
end
class Lecture < ActiveRecord::Base
belongs_to :category
has_many :lessons, through: :chapters, dependent: :destroy
has_many :chapters
belongs_to :teacher
# For course user relationship
has_many :enrollments
has_many :users, through: :enrollments
accepts_nested_attributes_for :enrollments
accepts_nested_attributes_for :chapters
end
class Chapter < ActiveRecord::Base
has_many :lessons
belongs_to :lecture
accepts_nested_attributes_for :lessons
end

Answer 1

To find the number of lessons belonging to a lecture in which the current user is related you can do this
<%= lecture.lessons.select{ |l| l.users.inculde? current_user }.count %>
but you have to add this to Lesson.rb:
has_many :users, through: :user_lessons

Answer 2

As you have #user in your view (which is the current_user), so you can just call the following in your view to get the total number of lessons for this user:
Lesson.joins(:user_lessons).where('user_lessons.user_id = ?', #user.id).count
To get the total number of lessons in this lecture for this user:
Lesson.joins(:user_lessons).joins(:lectures).where('user_lessons.user_id = ? AND lectures.id = ?', #user.id, lecture.id).count
where lecture is your local variable in your view file.
You should be able to call this directly from your view to get the desired count.