Enables infinite precision on Money attributes based on column type #1
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Uses work on `money` gem (ShippingEasy/money#2) and the `monetize` gem (ShippingEasy/monetize#1) to add infinite_precision support at the instance level. Leveraging that work these changes set the precision on the Money instance for a model attribute based on that attributes backing column type. If it is backed by a :decimal column an infinite precision Money instance is created. Otherwise a normal precision instance is created.
Also provides a setting `infer_precision` that will tell `monetize` to
base the precision on the backing column type if it is not explicitly
provided.
For backwards compatability the feature works as follows:
1. If an explicit option is provided to `monetize` that is used
2. If no explicit option, and `infer_precision` is not set (defaults
to false), then use the global `default_infinite_precision`.
3. If no explicit option, and `infer_precision` *is* set, use
`infinite_precision` if the attribute's column type is `:decimal`.
If `options[:infinite_precision]` is not set the default will automatically be used. There is no need to assign it explicitely.
Precision inference only works if the model's backing table already exists. If it does not, we are likely in a migration.
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Uses work on
moneygem (ShippingEasy/money#2) and themonetizegem (ShippingEasy/monetize#1) to add infinite_precision support at the instance level. Leveraging that work these changes set the precision on the Money instance for a model attribute based on that attributes backing column type. If it is backed by a:decimalcolumn an infinite precision Money instance is created. Otherwise a normal precision instance is created.I considered allowing the precision to be passed as an option on
monetize, but it seemed awkward to have the precision not match the backing column type. If you suddenly want more / less precision, you can simply change the column. Perhaps that was overly prescriptive though. Similarly, the current approach does not respect the global setting for precisionMoney.default_infinite_precisionand instead favors the precision implied by the backing column type.