Class: CommerceUnits::Dimension

Inherits:
ActiveRecord::Base
  • Object
show all
Defined in:
lib/commerce_units/dimension.rb

Overview

Schema Information

Table name: commerce_units_dimensions

id                :integer          not null, primary key
root_dimension    :string(255)      not null
unit_name         :string(255)      not null
multiply_constant :decimal(15, 5)   default(1.0), not null
unitary_role      :string(255)      default("tertiary"), not null
created_at        :datetime
updated_at        :datetime

Defined Under Namespace

Classes: NoPrimaryUnit

Constant Summary collapse

KnownRoots = 
[:money, :mass]

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.create_and_consider_making_primary!(param_hash) ⇒ Object 



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# File 'lib/commerce_units/dimension.rb', line 37

def create_and_consider_making_primary!(param_hash)
  dimension = create! param_hash
  dimension.make_primary! if primary_unit_by_roots(dimension.root_dimension).blank?
  dimension
end

.find_or_create_and_consider_making_primary!(param_hash) ⇒ Object 



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# File 'lib/commerce_units/dimension.rb', line 43

def find_or_create_and_consider_making_primary!(param_hash)
  where(param_hash).first || create_and_consider_making_primary!(param_hash)
end

.from_array_of_unit_names!(names) ⇒ Object 



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# File 'lib/commerce_units/dimension.rb', line 28

def from_array_of_unit_names!(names)
  result = where unit_name: names
  unless result.count == names.count
    unfound_names = names.map(&:to_s) - result.map(&:unit_name)
    raise ActiveRecord::RecordNotFound, "I don't know the following units: #{unfound_names} out of #{names}"
  end
  result
end

Instance Method Details

#make_primary! ⇒ Object 



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# File 'lib/commerce_units/dimension.rb', line 75

def make_primary!
  _shift_primary! if self.class.primary_unit_by_roots(root_dimension).present?
  _make_primary!
  self
end

#to_converter_unit ⇒ Object 



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# File 'lib/commerce_units/dimension.rb', line 48

def to_converter_unit
  CommerceUnits::Unit.new.tap do |u|
    u.numerator = [_primary_root_unit_name]
    u.denominator = [unit_name]
  end
end

#to_converter_value ⇒ Object 



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# File 'lib/commerce_units/dimension.rb', line 61

def to_converter_value
  CommerceUnits::Value.new.tap do |v|
    v.number = multiply_constant
    v.unit = to_converter_unit
  end
end

#to_unit ⇒ Object 



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# File 'lib/commerce_units/dimension.rb', line 55

def to_unit
  CommerceUnits::Unit.new.tap do |u|
    u.numerator = [unit_name]
  end
end

#to_value ⇒ Object 



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# File 'lib/commerce_units/dimension.rb', line 68

def to_value
  CommerceUnits::Value.new.tap do |v|
    v.number = multiply_constant
    v.unit = to_unit
  end
end