UnitPrice

A price per amount of something, such as £2.50 per kilo.

Use it for goods sold by weight, volume, length or area, as UK shelf labels show them. For the price of a thing you count, use Price.

Shape

One of these, each with its own fields:

Example

UnitPrice.per_mass { price: money.from_minor(250, Currency.gbp) per: 1kg }

Good to know

• Pick the variant by what you measure: per_mass, per_volume, per_length or per_area.
• Neither the price nor the amount can be below zero.
• == tells you whether two are the same. < and list.sort_by don't take it.

In JSON

An object of its variant's name, as tag, and the variant's fields, in a request, a response or json.write:

{"tag":"per_mass","price":{"amount":250,"currency":"GBP"},"per":{"value":"1","unit":"kg"}}{"tag":"per_volume","price":{"amount":180,"currency":"GBP"},"per":{"value":"0.001","unit":"cubic_metre"}}{"tag":"per_length","price":{"amount":399,"currency":"GBP"},"per":{"value":"1","unit":"metre"}}

Details