[FIX] l10n_es_pos: set simplifed partner only when we will invoice

Currently we also set the simplified partner directly on pos orders even
in case we do not invoice the pos order directly.
This is unnecessary; we only need to set a partner in case we invoice.
(Since we need a partner to put on the invoice.)

After this commit we only set the simplified partner on pos orders
that will be invoiced as simplified invoice.
(This happens automatically in case a simplified invoice journal is
set in the settings; see field `pos_l10n_es_simplified_invoice_journal_id`)

part of
task-3745982

X-original-commit: 5cc84e1
Part-of: odoo#221431
Signed-off-by: Sven Führ (svfu) <[email protected]>

Author: svfu-odoo

addons/l10n_es_pos/models/pos_order.py

@@ -15,6 +15,18 @@ def _compute_l10n_es_simplified_invoice_number(self):
             else:
                 order.l10n_es_simplified_invoice_number = False
 
+    def _generate_pos_order_invoice(self):
+        # Extend 'point_of_sale'
+        # Add the simplified partner in case we do a simplified invoice and no partner is set
+        if not self.config_id.is_spanish:
+            return super()._generate_pos_order_invoice()
+        for order in self:
+            if order.account_move or not order.to_invoice or not order.is_l10n_es_simplified_invoice:
+                continue
+            if not order.partner_id:
+                order.partner_id = self.config_id.simplified_partner_id
+        return super()._generate_pos_order_invoice()
+
     def _prepare_invoice_vals(self):
         res = super()._prepare_invoice_vals()
         if self.config_id.is_spanish and self.is_l10n_es_simplified_invoice:

addons/l10n_es_pos/static/src/app/screens/payment_screen/payment_screen.js

@@ -25,7 +25,7 @@ patch(PaymentScreen.prototype, {
                 if ((await this._askForCustomerIfRequired()) === false) {
                     return false;
                 }
-                if (!order.partner_id) {
+                if (!order.partner_id && order.to_invoice) {
                     const setPricelist =
                         this.pos.config.pricelist_id?.id != order.pricelist_id?.id
                             ? order.pricelist_id