forked from fixin.me/fixin.me
36 lines
922 B
Ruby
36 lines
922 B
Ruby
class Quantity < ApplicationRecord
|
|
belongs_to :user, optional: true
|
|
belongs_to :parent, optional: true, class_name: "Quantity"
|
|
has_many :subquantities, class_name: "Quantity", inverse_of: :parent,
|
|
dependent: :restrict_with_error
|
|
|
|
validate if: ->{ parent.present? } do
|
|
errors.add(:parent, :user_mismatch) unless user == parent.user
|
|
end
|
|
validates :name, presence: true, length: {maximum: type_for_attribute(:name).limit}
|
|
validates :description, length: {maximum: type_for_attribute(:description).limit}
|
|
|
|
scope :defaults, ->{ where(user: nil) }
|
|
scope :ordered, ->{
|
|
left_outer_joins(:parent).order(ordering)
|
|
}
|
|
|
|
def self.ordering
|
|
[arel_table.coalesce(Arel::Table.new(:parents_quantities)[:name], arel_table[:name]),
|
|
arel_table[:parent_id].not_eq(nil),
|
|
:name]
|
|
end
|
|
|
|
def to_s
|
|
name
|
|
end
|
|
|
|
def movable?
|
|
subunits.empty?
|
|
end
|
|
|
|
def default?
|
|
parent_id.nil?
|
|
end
|
|
end
|