fix depends

odex25_transactions/exp_transaction_documents/models/__init__.py

@@ -7,4 +7,5 @@ from . import internal_transaction
 from . import outgoing_transaction
 from . import incoming_transaction
 from . import tools
+from . import letter
 #

odex25_transactions/exp_transaction_documents/models/letter.py

@@ -0,0 +1,11 @@
+# -*- coding: utf-8 -*-
+import base64
+from odoo import api, fields, models, _
+from odoo.exceptions import UserError
+from hijri_converter import convert
+import datetime
+
+
+class Letters(models.Model):
+    _name = "letters.letters"
+    name = fields.Char(string="Name", tracking=True)

odex25_transactions/exp_transation_letters/models/letter.py

@@ -7,8 +7,8 @@ import datetime
 
 
 class Letters(models.Model):
-    _name = "letters.letters"
-    _inherit = 'mail.thread'
+    _inherit = ["letters.letters",'mail.thread']
+
 
     name = fields.Char(string="Name", tracking=True)
     unite = fields.Many2one('cm.entity', string="Unite", tracking=True)