[FIX] dms: Improve the unlink method in base to avoid errors

In the uninstall process of dms, checks were made that prevented the
removal of fields and models being deleted, also causing the dms_file
and dms_directory tables to continue to exist.

dms/models/base.py

@@ -1,4 +1,5 @@
 # Copyright 2021 Tecnativa - Jairo Llopis
+# Copyright 2024 Tecnativa - Víctor Martínez
 # License LGPL-3.0 or later (https://www.gnu.org/licenses/lgpl).
 
 from odoo import models
@@ -8,12 +9,20 @@ class Base(models.AbstractModel):
     _inherit = "base"
 
     def unlink(self):
-        """Cascade DMS related resources removal."""
+        """Cascade DMS related resources removal.
+        Avoid executing in the transient models, in the models we want to check
+        (dms.file and dms.directory) and make sure that the models exist (in the
+        uninstall process of dms)."""
         result = super().unlink()
-        self.env["dms.file"].sudo().search(
-            [("res_model", "=", self._name), ("res_id", "in", self.ids)]
-        ).unlink()
-        self.env["dms.directory"].sudo().search(
-            [("res_model", "=", self._name), ("res_id", "in", self.ids)]
-        ).unlink()
+        models_to_check = ("dms.file", "dms.directory")
+        if self._name not in models_to_check and not self.is_transient():
+            models = (
+                self.env["ir.model"]
+                .sudo()
+                .search([("model", "in", models_to_check)])
+                .mapped("model")
+            )
+            domain = [("res_model", "=", self._name), ("res_id", "in", self.ids)]
+            for model in models:
+                self.env[model].sudo().search(domain).unlink()
         return result