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[FIX] point_of_sale: compute the tax based on the rounded price

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Before this, we would compute taxes based on quantity * price. In
account.tax (used by the POS backend) however taxes are computed on a
rounded (based on currency precision) quantity * price. This would cause
issues as orders in the backend would have a different total price as
calculated in the frontend.

An example that used to trigger the problem:

Order with orderline with product with price of 5, excluded tax of 21%
and a quantity of 0.985. This would cost 5.96 in the frontend and 5.97
in the backend.
This commit is contained in:
Joren Van Onder
2015-11-19 09:12:50 +01:00
parent 07a89b8aee
commit 317c6b82a2
1 changed files with 4 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files
addons/point_of_sale/static/src/js/models.js
+4 -4
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@@ -1325,13 +1325,13 @@ exports.Orderline = Backbone.Model.extend({
return base_amount >= 0 ? ret : ret * -1;
}
if ((tax.amount_type === 'percent' && !tax.price_include) || (tax.amount_type === 'division' && tax.price_include)){
return (base_amount * tax.amount / 100) * quantity;
return base_amount * tax.amount / 100;
}
if (tax.amount_type === 'percent' && tax.price_include){
return (base_amount - (base_amount / (1 + tax.amount / 100))) * quantity;
return base_amount - (base_amount / (1 + tax.amount / 100));
}
if (tax.amount_type === 'division' && !tax.price_include) {
return (base_amount / (1 - tax.amount / 100) - base_amount) * quantity;
return base_amount / (1 - tax.amount / 100) - base_amount;
}
return false;
},
@@ -1354,7 +1354,7 @@ exports.Orderline = Backbone.Model.extend({
list_taxes.concat(ret.taxes);
}
else {
var tax_amount = self._compute_all(tax, price_unit, quantity);
var tax_amount = self._compute_all(tax, base, quantity);
tax_amount = round_pr(tax_amount, currency_rounding);
if (tax_amount){