optimize generation of pdf if its not stored to db

wizard_runreport.py

@@ -118,21 +118,10 @@ class RunXRechnungReport(Wizard):
                     'invoice_report_cache_id': None,
                     'invoice_report_format': None}])
 
-        to_generate = [x.id for x in invoices if not x.invoice_report_cache]
+        to_generate = [x for x in invoices if not x.invoice_report_cache]
         if to_generate:
-            report_action = XReport.get_used_report()
-
-            # run selected report on invoices w/o stored report-data
-            data2 = {}
-            data2.update(data)
-            data2['action_id'] = report_action.id
-            data2['model'] = report_action.model
-            data2['id'] = to_generate[0]
-            data2['ids'] = to_generate
-
-            RepInvoice = pool.get(report_action.report_name, type='report')
-            with Transaction().set_context({'with_rec_name': False}):
-                RepInvoice.execute(to_generate, data2)
+            # the pdf should be stored in db...
+            XReport.generate_pdf_data(to_generate)
 
     def do_export(self, action):
         """ run export
@@ -151,7 +140,6 @@ class RunXRechnungReport(Wizard):
         if data['edocument'] == 'edocument.facturxext.invoice-ferd':
             # pdf is stored to db
             self.generate_invoice_reports(data)
-
         return action, data
 
 # end RunXRechnungReport

xreport.py

@@ -11,6 +11,7 @@ from trytond.report import Report
 from trytond.pool import Pool
 from trytond.exceptions import UserError
 from trytond.i18n import gettext
+from trytond.transaction import Transaction
 from .wizard_runreport import edoc_versions
 
 
@@ -112,6 +113,36 @@ class XReport(Report):
                 'account_invoice_xrechnung.msg_no_report_found'))
         return act_report
 
+    @classmethod
+    def generate_pdf_data(cls, records):
+        """ generate pdf of invoice using defined report
+
+        Args:
+            records (list): records of account.invoice
+
+        Returns:
+            list: dicts - {'content': <pdf-data>, 'fname': 'file-name'}
+        """
+        report_action = cls.get_used_report()
+        RepInvoice = Pool().get(report_action.report_name, type='report')
+
+        # run selected report on invoices w/o stored report-data
+        data2 = {}
+        data2['action_id'] = report_action.id
+        data2['model'] = report_action.model
+        result = []
+        for record in records:
+            data2['id'] = record.id
+            data2['ids'] = [record.id]
+
+            with Transaction().set_context({'with_rec_name': False}):
+                (ext, content, print1, fname) = RepInvoice.execute(
+                    [record.id], data2)
+                result.append({
+                    'content': content,
+                    'fname': fname})
+        return result
+
     @classmethod
     def get_zugferd_pdf(cls, invoice, invoice_xml):
         """ generate ZugFeRD-PDF
@@ -120,15 +151,22 @@ class XReport(Report):
             invoice (record): model account.invoice
             invoice_xml (str): xml-data
         """
-        # pdf was already stored to db
-        if not (invoice.invoice_report_cache and (
-                invoice.invoice_report_format == 'pdf')):
-            raise UserError(gettext(
-                'account_invoice_xrechnung.msg_invalid_cachecontent',
-                invoice_name=invoice.rec_name))
+        # pdf was already stored to db, must be pdf
+        if invoice.invoice_report_cache:
+            if invoice.invoice_report_format != 'pdf':
+                raise UserError(gettext(
+                    'account_invoice_xrechnung.msg_invalid_cachecontent',
+                    invoice_name=invoice.rec_name))
+            pdf_data = invoice.invoice_report_cache
+        else:
+            # run report, could fail because we are in
+            # readonly-transaction
+            report_data = cls.generate_pdf_data([invoice])
+            if report_data:
+                pdf_data = report_data[0]['content']
 
         zugferd_pdf = generate_from_binary(
-            pdf_file=invoice.invoice_report_cache,
+            pdf_file=pdf_data,
             xml=invoice_xml,
             check_xsd=True,
             pdf_metadata={