[IMP] - manage substitution for mail.thread message_post_with_template

report_substitute/models/mail_thread.py

@@ -0,0 +1,24 @@
+# Copyright 2019 ACSONE SA/NV
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+
+from odoo import api, models
+
+
+class MailThread(models.AbstractModel):
+
+    _inherit = 'mail.thread'
+
+    @api.multi
+    def message_post_with_template(self, template_id, **kwargs):
+        template = self.env['mail.template'].browse(template_id)
+        old_report = False
+        if template and template.report_template and self.ids:
+            active_ids = self.ids
+            old_report = template.report_template
+            template.report_template = old_report.get_substitution_report(
+                active_ids
+            )
+        res = super().message_post_with_template(template_id, **kwargs)
+        if old_report:
+            template.report_template = old_report
+        return res