Save template redner as an attachment

Add constraint on attachment field

Note that it is normally expected that when printing a report from an object,
the created document is saved as an attachment to the object
if the field "Save as attachment prefix" is filled in.

Problem:
This does not work for redner reports (works for QWEB and worked for py3o).

NEWS.rst

@@ -2,6 +2,11 @@
 NEWS
 ====
 
+13.0.3.0.1
+==========
+
+Save template redner as an attachment
+
 13.0.3.0.0
 ==========
 

__manifest__.py

@@ -21,7 +21,7 @@
     "name": "Redner",
     "summary": """
 Allows to generate transactional emails and documents in PDF or HTML format""",
-    "version": "13.0.3.0.0",
+    "version": "13.0.3.0.1",
     "category": "Technical",
     "author": "XCG Consulting",
     "website": "http://odoo.consulting/",

i18n/fr.po

@@ -6,8 +6,8 @@
 msgstr ""
 "Project-Id-Version: Odoo Server 11.0\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2021-05-03 13:50+0000\n"
-"PO-Revision-Date: 2021-05-03 15:56+0200\n"
+"POT-Creation-Date: 2022-03-04 11:11+0000\n"
+"PO-Revision-Date: 2022-03-04 12:12+0100\n"
 "Last-Translator: Vincent Hatakeyama <vincent.hatakeyama@xcg-consulting.fr>\n"
 "Language-Team: XCG Consulting\n"
 "Language: fr\n"
@@ -15,7 +15,7 @@
 "Content-Type: text/plain; charset=UTF-8\n"
 "Content-Transfer-Encoding: 8bit\n"
 "Plural-Forms: nplurals=2; plural=(n > 1);\n"
-"X-Generator: Virtaal 0.7.1\n"
+"X-Generator: Poedit 2.3\n"
 
 #. module: redner
 #: code:addons/redner/models/redner_template.py:0
@@ -43,8 +43,8 @@
 #: model:ir.model.fields,help:redner.field_email_template_preview__is_redner_template
 #: model:ir.model.fields,help:redner.field_mail_template__is_redner_template
 msgid ""
-"Check this box if this template is a redner. If it's not checked, it assumes"
-" that the default email template odoo to be used."
+"Check this box if this template is a redner. If it's not checked, it assumes "
+"that the default email template odoo to be used."
 msgstr ""
 
 #. module: redner
@@ -147,9 +147,8 @@
 #: model:ir.model.fields,help:redner.field_ir_actions_report__redner_multi_in_one
 msgid ""
 "If you execute a report on several records, by default Odoo will generate a "
-"ZIP file that contains as many files as selected records. If you enable this"
-" option, Odoo will generate instead a single report for the selected "
-"records."
+"ZIP file that contains as many files as selected records. If you enable this "
+"option, Odoo will generate instead a single report for the selected records."
 msgstr ""
 
 #. module: redner
@@ -385,6 +384,15 @@
 msgstr "Modèles"
 
 #. module: redner
+#: code:addons/redner/models/ir_actions_report.py:0
+#, python-format
+msgid ""
+"The output format cannot be different from the extension defined in \"Save "
+"as attachment prefix\"."
+msgstr "Le format de sortie ne peut être différent de l'extension définie dans \"Enregistrer "
+"comme préfixe de pièce jointe\"."
+
+#. module: redner
 #: model:ir.model.fields,help:redner.field_ir_actions_report__report_type
 msgid ""
 "The type of the report that will be rendered, each one having its own "
@@ -458,11 +466,4 @@
 #. module: redner
 #: model:ir.model.fields,help:redner.field_redner_template__language
 msgid "templating language"
-msgstr "templating language"
-
-#~ msgid ""
-#~ "Check this box if this template is a redner. If it's not checked , it "
-#~ "assumes that the default email template odoo to be used."
-#~ msgstr ""
-#~ "Check this box if this template is a redner. If it's not checked , it "
-#~ "assumes that the default email template odoo to be used."
+msgstr "templating language"
\ No newline at end of file

models/ir_actions_report.py

+import base64
 import logging
 import time
 
 from odoo import _, api, fields, models
@@ -1,8 +2,8 @@
 import logging
 import time
 
 from odoo import _, api, fields, models
-from odoo.exceptions import ValidationError
+from odoo.exceptions import AccessError, ValidationError
 from odoo.tools.safe_eval import safe_eval
 
 from odoo.addons.redner.utils.formats import Formats
@@ -26,6 +27,19 @@
                     _("Field 'Output Format' is required for Redner report")
                 )
 
+    @api.constrains("redner_filetype", "attachment")
+    def _check_redner_attachment(self):
+        for report in self:
+            if report.report_type == "redner" and report.attachment:
+                ext = ".{ftype}".format(ftype=report.redner_filetype)
+                if ext not in report.attachment:
+                    raise ValidationError(
+                        _(
+                            "The output format cannot be different from the "
+                            'extension defined in "Save as attachment prefix".'
+                        )
+                    )
+
     @api.model
     def _get_redner_filetypes(self):
         formats = Formats()
@@ -191,3 +205,43 @@
                     if attachment_id:
                         save_in_attachment[record_id.id] = attachment_id
         return save_in_attachment
+
+    def postprocess_redner_report(self, record, buffer):
+        """Handle post processing during the report generation.
+        The basic behavior consists to create a new attachment containing
+        the document base64 encoded.
+        """
+
+        self.ensure_one()
+
+        attachment_name = safe_eval(
+            self.attachment, {"object": record, "time": time}
+        )
+
+        if not attachment_name:
+            return None
+
+        if not attachment_name.endswith(
+            ".{filetype}".format(filetype=self.redner_filetype)
+        ):
+            return None
+
+        attachment_vals = {
+            "name": attachment_name,
+            "datas": base64.encodestring(buffer.getvalue()),
+            "res_model": self.model,
+            "res_id": record.id,
+            "type": "binary",
+        }
+        try:
+            self.env["ir.attachment"].create(attachment_vals)
+        except AccessError:
+            _logger.info(
+                "Cannot save report %r as attachment", attachment_vals["name"]
+            )
+        else:
+            _logger.info(
+                "The document %s is now saved in the database",
+                attachment_vals["name"],
+            )
+        return buffer

models/render_report.py

@@ -39,7 +39,7 @@
                 # consumption...
                 # ... but odoo wants the whole data in memory anyways :)
                 buffer = BytesIO(f.read())
-                self.ir_actions_report_id.postprocess_pdf_report(
+                self.ir_actions_report_id.postprocess_redner_report(
                     model_instance, buffer
                 )
         return result_path
@@ -78,6 +78,8 @@
         content = base64.b64decode(res[0]["body"])
         with open(report_file, "wb") as f:
             f.write(content)
+
+        self._postprocess_report(model_instance, report_file)
         return report_file
 
     def _get_or_create_single_report(