ActiveRecord::RecordInvalid: Validation failed: User can't be of a different company

template.rb

class Template < ActiveRecord::Base
  belongs_to :company
  belongs_to :template_category
  belongs_to :user

  validates :name, :subject, :body, :company, :template_category, :user, presence: true
  validate :recommended_only_admin_user, :template_category_same_company, :user_same_company

  private

  def recommended_only_admin_user
    if recommended and not user.admin?
      errors.add(:recommended, 'only admin user can create')
    end
  end

  def template_category_same_company
    if not template_category.nil? and not template_category.company.eql? company
      errors.add(:template_category, "can't be of a different company")
    end
  end

  def user_same_company
    if not user.nil? and not user.admin? and not user.company.eql? company_id
      errors.add(:user, "can't be of a different company")
    end
  end
end

templates.rb

FactoryGirl.define do
  factory :template do
    name "MyString"
    subject "MyString"
    body "MyText"
    signture "MyText"
    recommended false
    company
    user { build(:user, company: company) }
    template_category { build(:template_category, company: company) }
  end
end