stud = Student.create(:student_id => 1, :first_name => 'Jos', :last_name => 'Norton', :email => 'ss.norton@gmail.com', :birthday => '12/05/1995', :subjects => 'English', :username => 'samnorton05', :password => 'Grace02112')

ActiveRecord::HasManyThroughAssociationNotFoundError: Could not find the association :enrolled_subjects in model Student

class Student < ApplicationRecord

  has_many :subjects, through: :enrolled_subjects
  has_many :teachers, through: :enrolled_subjects

  def teacher_names
    self.teachers.map(&:name).join(", ")
  end

  has_many :admin_users
  has_secure_password
  self.primary_key = :student_id


  scope :newest_first, lambda { order("created_at ASC") }
  scope :oldest_first, lambda { order("created_at DESC") }
  # scope :search, lambda { |query| where(["name LIKE ?", "%#{query}%"])}

end

class Teacher < ApplicationRecord

  has_many :subjects, through: :enrolled_subjects
  has_many :students, through: :enrolled_subjects
  has_many :admin_users
  has_secure_password

  scope :newest_first, lambda { order("created_at ASC") }
  scope :oldest_first, lambda { order("created_at DESC") }
  # scope :search, lambda { |query| where(["name LIKE ?", "%#{query}%"])}
end

class Subject < ApplicationRecord

  has_many :students, through: :enrolled_subjects
  has_many :teachers, through: :enrolled_subjects
  has_many :admin_users

  # scope :search, lambda { |query| where(["name LIKE ?", "%#{query}%"])}

end

class EnrolledSubject < ApplicationRecord
  belongs_to :student
  belongs_to :subject
  belongs_to :teacher
end

class AdminUser < ApplicationRecord

  has_secure_password

  scope :newest_first, lambda { order("created_at ASC") }
  scope :oldest_first, lambda { order("created_at DESC") }
  # scope :search, lambda { |query| where(["name LIKE ?", "%#{query}%"])}
end