* unit_price_price_and_unit refers UnitPrice which refers to other attributes
that belong to variant and product.
Instead of collecting all the attributes that were using indirectly by the method and adding them to the serializers
I perefered to serialize the result of the method call.
This can happen when there's a validation error. The field with error will also be marked changed, but the error style will override it.
I'd like to move this into a FormBuilder. Existing formbuilder gems don't seem to support it (though I didn't look very hard).
We need to recalculate the voucher adjustment(s) in the following
scenarii :
When a voucher as been added to the order and :
* Moving to the payment step from details step, to take into account
potential change in shipment fees. (this happen if we return to the
details step after reaching the summary step)
* Moving to the summary step from payment step, to take into account
payment fees
for some helpers like display_checkout_taxes_hash, it's needed to access the tax rates through the adjument's originator.
The adjustment's originator will store the minimal details: id, type and amount
For every adjustment a list of tax rates will be created using TaxRateFinder.tax_rates_of.
This will prevent running the queries to find the tax rates during the invoice generation.
1. reimplment the helper on the LintItem presenter
2. add the tax rate associated to the line items to the list of objects to serialize during the order serialization.
3. implement a presenter for the introducer tax rates.
I guess validates_length_from_database also validates numbers. That's not a bad thing.
So now it's being validated, we should validate the transformed value that will be saved to the database.
We know if the values are too long, so let's provide a useful message rather than generating an unhandled database error.
This code seems rather repetetive, it would be good to use a shared module. I wonder if there's a gem for that.
Note that the existing /products/*/edit screen doesn't even handle validation errors yet, but that's something for another day..
