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class CharacterItem < ApplicationRecord
belongs_to :character
belongs_to :item
validates :quantity, presence: true
after_initialize do
if self.new_record?
self.quantity ||= 0
end
end
after_save :destroy_if_zero_quantity
scope :ordered_by_item_name, -> { includes(:item).order("items.name") }
private
def destroy_if_zero_quantity
if self.quantity == 0
destroy
elsif self.quantity < 0
# TODO: Can improve this (at the least, with reporting, later).
raise ItemQuantityError
end
end
end
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