Find cooperator from vat instead of email

energy_communities/models/res_partner.py

@@ -6,3 +6,14 @@ class ResPartner(models.Model):
 
     gender = fields.Selection(selection_add=[("not_binary", "Not binary"),
                                              ("not_share", "I prefer to not share it")])
+
+    def get_cooperator_from_vat(self, vat):
+        if vat:
+            vat = vat.strip()
+        # email could be falsy or be only made of whitespace.
+        if not vat:
+            return self.browse()
+        partner = self.search(
+            [("vat", "ilike", vat)], limit=1
+        )
+        return partner

energy_communities/models/subscription_request.py

@@ -43,3 +43,18 @@ class SubscriptionRequest(models.Model):
         vals = super(SubscriptionRequest, self).get_partner_vals()
         vals["company_id"] = self.company_id.id
         return vals
+
+    def _find_partner_from_create_vals(self, vals):
+        partner_model = self.env["res.partner"]
+        partner_id = vals.get("partner_id")
+        if partner_id:
+            return partner_model.browse(partner_id)
+        if vals.get("is_company"):
+            partner = partner_model.get_cooperator_from_crn(
+                vals.get("company_register_number")
+            )
+        else:
+            partner = partner_model.get_cooperator_from_vat(vals.get("vat"))
+        if partner:
+            vals["partner_id"] = partner.id
+        return partner