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class Character < ApplicationRecord
belongs_to :user
belongs_to :activity, optional: true
has_many :character_items
has_many :items, through: :character_items
validates :name, presence: true
validates_length_of :name, maximum: 15, message: "can't be longer than 15 characters"
validates_uniqueness_of :name, message: "is already being used"
validates_format_of :name, with: /\A[a-z]+\z/i, message: "must consist of letters only"
def shift_item(gid, amount)
CharacterItem.transaction do
item = self.character_items.find_or_initialize_by(item: Item.find_by_gid(gid))
item.increment(:quantity, amount)
item.save
end
end
end
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