forked from fixin.me/fixin.me
91 lines
3.7 KiB
Ruby
91 lines
3.7 KiB
Ruby
class Unit < ApplicationRecord
|
|
belongs_to :user, optional: true
|
|
belongs_to :base, optional: true, class_name: "Unit"
|
|
has_many :subunits, class_name: "Unit", dependent: :restrict_with_error, inverse_of: :base
|
|
|
|
validate if: ->{ base.present? } do
|
|
errors.add(:base, :user_mismatch) unless user == base.user
|
|
errors.add(:base, :multilevel_nesting) if base.base.present?
|
|
end
|
|
validates :symbol, presence: true, uniqueness: {scope: :user_id},
|
|
length: {maximum: columns_hash['symbol'].limit}
|
|
validates :name, length: {maximum: columns_hash['name'].limit}
|
|
validates :multiplier, numericality: {equal_to: 1}, unless: :base
|
|
validates :multiplier, numericality: {other_than: 0}, if: :base
|
|
|
|
scope :defaults, ->{ where(user: nil) }
|
|
scope :defaults_diff, ->{
|
|
actionable_units = Arel::Table.new('actionable_units')
|
|
units = actionable_units.alias('units')
|
|
bases_units = arel_table.alias('bases_units')
|
|
other_units = arel_table.alias('other_units')
|
|
other_bases_units = arel_table.alias('other_bases_units')
|
|
sub_units = arel_table.alias('sub_units')
|
|
|
|
Unit.with_recursive(actionable_units: [
|
|
Unit.with(units: self.or(Unit.defaults)).left_joins(:base)
|
|
.where.not(
|
|
# Exclude Units that are/have default counterpart
|
|
Arel::SelectManager.new.project(1).from(other_units)
|
|
.outer_join(other_bases_units)
|
|
.on(other_units[:base_id].eq(other_bases_units[:id]))
|
|
.where(
|
|
other_bases_units[:symbol].is_not_distinct_from(bases_units[:symbol])
|
|
.and(other_units[:symbol].eq(arel_table[:symbol]))
|
|
.and(other_units[:user_id].is_distinct_from(arel_table[:user_id]))
|
|
).exists
|
|
)
|
|
.select(
|
|
arel_table[Arel.star],
|
|
# Decide if Unit can be im-/exported based on existing hierarchy:
|
|
# * same base unit symbol has to exist
|
|
# * unit with subunits can only be ported to root
|
|
arel_table[:base_id].eq(nil).or(
|
|
(
|
|
Arel::SelectManager.new.project(1).from(other_units)
|
|
.join(sub_units).on(other_units[:id].eq(sub_units[:base_id]))
|
|
.where(
|
|
other_units[:symbol].eq(arel_table[:symbol])
|
|
.and(other_units[:user_id].is_distinct_from(arel_table[:user_id]))
|
|
).exists.not
|
|
).and(
|
|
Arel::SelectManager.new.project(1).from(other_bases_units)
|
|
.where(
|
|
other_bases_units[:symbol].is_not_distinct_from(bases_units[:symbol])
|
|
.and(other_bases_units[:user_id].is_distinct_from(bases_units[:user_id]))
|
|
).exists
|
|
)
|
|
).as('portable')
|
|
),
|
|
# NOTE: turn off ONLY_FULL_GROUP_BY or is it incompatible with other DBs?
|
|
# Fill base Units to display proper hierarchy. Duplicates will be removed
|
|
# by final group() - can't be deduplicated with UNION due to 'portable' field.
|
|
arel_table.join(actionable_units).on(actionable_units[:base_id].eq(arel_table[:id]))
|
|
.project(arel_table[Arel.star], Arel::Nodes.build_quoted(nil).as('portable'))
|
|
]).select(units: column_names).select(units[:portable].minimum.as('portable'))
|
|
.from(units).group(Unit.column_names)
|
|
}
|
|
scope :ordered, ->{
|
|
left_outer_joins(:base)
|
|
.order(arel_table.coalesce(Arel::Table.new(:bases_units)[:symbol], arel_table[:symbol]),
|
|
arel_table[:base_id].asc.nulls_first, :multiplier, :symbol)
|
|
}
|
|
|
|
before_destroy do
|
|
# TODO: disallow destruction if any object depends on this unit
|
|
nil
|
|
end
|
|
|
|
def movable?
|
|
subunits.empty?
|
|
end
|
|
|
|
def default?
|
|
user_id.nil?
|
|
end
|
|
|
|
def exportable?
|
|
!default? && (base.nil? || base.default?)
|
|
end
|
|
end
|