Tax receipt subtotal now includes donations in foreign currencies

'Account' decimal precision doesn't exist in v10 -> use currency precision
Add Eligible tax receipt amount in donation report

donation_base/models/donation_tax_receipt.py

@@ -4,7 +4,6 @@
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
 
 from odoo import models, fields, api
-import odoo.addons.decimal_precision as dp
 
 
 class DonationTaxReceipt(models.Model):
@@ -19,8 +18,7 @@ class DonationTaxReceipt(models.Model):
         index=True)
     donation_date = fields.Date(string='Donation Date')
     amount = fields.Monetary(
-        string='Amount', digits=dp.get_precision('Account'),
-        currency_field='currency_id')
+        string='Amount', currency_field='currency_id')
     currency_id = fields.Many2one(
         'res.currency', string='Currency', required=True, ondelete='restrict',
         default=lambda self: self.env.user.company_id.currency_id.id)
@@ -49,6 +47,7 @@ class DonationTaxReceipt(models.Model):
 
     @api.model
     def update_tax_receipt_annual_dict(
-            self, tax_receipt_annual_dict, start_date, end_date, precision):
+            self, tax_receipt_annual_dict, start_date, end_date,
+            precision_rounding):
         '''This method is inherited in donation and donation_sale
         It is called by the tax.receipt.annual.create wizard'''

donation_base/wizard/tax_receipt_annual_create.py

@@ -45,10 +45,10 @@ class TaxReceiptAnnualCreate(models.TransientModel):
         self.ensure_one()
         dtro = self.env['donation.tax.receipt']
         tax_receipt_annual_dict = {}
-        precision = self.env['decimal.precision'].precision_get('Account')
+        precision_rounding = self.env.user.company_id.currency_id.rounding
         self.env['donation.tax.receipt'].update_tax_receipt_annual_dict(
             tax_receipt_annual_dict, self.start_date, self.end_date,
-            precision)
+            precision_rounding)
         # {commercial_partner: {
         #       'amount': amount,
         #       'extra_vals': {donation_ids': [donation1_id, donation2_id]}}}