[IMP] base_comment_template: Refactor code and convert to Many2Many

base_comment_template/migrations/13.0.1.0.0/pre-migration.py

@@ -0,0 +1,22 @@
+# Copyright 2020 NextERP Romania SRL
+# Copyright 2021 Tecnativa - Víctor Martínez
+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl).
+from openupgradelib import openupgrade
+
+
+@openupgrade.migrate()
+def migrate(env, version):
+    # Not tested
+    openupgrade.logged_query(
+        env.cr,
+        """
+        INSERT INTO base_comment_template_res_partner_rel
+        (res_partner_id, base_comment_template_id)
+        SELECT SPLIT_PART(ip.res_id, ',', 2)::int AS res_partner_id,
+        SPLIT_PART(ip.value_reference, ',', 2)::int AS base_comment_template_id
+        FROM ir_property ip
+        JOIN ir_model_fields imf ON ip.fields_id = imf.id
+        WHERE imf.name = 'property_comment_template_id'
+        AND imf.model = 'res.partner'
+        """,
+    )