diff --git a/addons/cetmix_tower_git/models/cx_tower_file.py b/addons/cetmix_tower_git/models/cx_tower_file.py
new file mode 100644
index 0000000..583f935
--- /dev/null
+++ b/addons/cetmix_tower_git/models/cx_tower_file.py
@@ -0,0 +1,47 @@
+# Copyright (C) 2024 Cetmix OÜ
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+from odoo import api, fields, models
+
+
+class CxTowerFile(models.Model):
+    _inherit = "cx.tower.file"
+
+    git_project_id = fields.Many2one(
+        comodel_name="cx.tower.git.project",
+        compute="_compute_git_project_id",
+        store=True,
+    )
+    git_project_rel_ids = fields.One2many(
+        comodel_name="cx.tower.git.project.rel",
+        inverse_name="file_id",
+        string="Git Project Relations",
+        copy=False,
+    )
+
+    # Get server from the first related git project relation
+    # This is needed for YAML import
+    server_id = fields.Many2one(
+        comodel_name="cx.tower.server",
+        compute="_compute_git_project_id",
+        store=True,
+        readonly=False,
+    )
+
+    @api.depends("git_project_rel_ids.server_id", "git_project_rel_ids.git_project_id")
+    def _compute_git_project_id(self):
+        """
+        Link to project using the proxy model.
+        """
+        for record in self:
+            # File is related to project via proxy model.
+            # So there can be only one record in o2m field.
+            git_project_relation = (
+                record.git_project_rel_ids and record.git_project_rel_ids[0]
+            )
+            if git_project_relation:
+                record.update(
+                    {
+                        "git_project_id": git_project_relation.git_project_id,
+                        "server_id": git_project_relation.server_id,
+                    }
+                )