forked from fixin.me/fixin.me
29 lines
1008 B
Ruby
29 lines
1008 B
Ruby
class Unit < ApplicationRecord
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belongs_to :user, optional: true
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# TODO: validate base.user == user
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belongs_to :base, optional: true, class_name: "Unit"
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validates :symbol, presence: true, uniqueness: {scope: :user_id},
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length: {maximum: columns_hash['symbol'].limit}
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validates :name, length: {maximum: columns_hash['name'].limit}
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validates :multiplier, absence: true, unless: :base
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validates :multiplier, presence: true, numericality: {other_than: 0}, if: :base
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validate if: ->{ base&.base.present? } do
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errors.add(:base, :multilevel_nesting)
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end
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scope :defaults, ->{ where(user: nil) }
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scope :ordered, ->{
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parent_symbol = Arel::Nodes::NamedFunction.new(
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'COALESCE',
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[Arel::Table.new(:bases_units)[:symbol], Unit.arel_table[:symbol]]
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)
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left_outer_joins(:base).order(parent_symbol, :multiplier)
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}
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before_destroy do
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# TODO: disallow destruction if any object depends on this unit
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nil
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end
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end
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