first push message

ks_gantt_view_base/models/ks_task_link.py

@@ -0,0 +1,33 @@
+from odoo import fields, models
+
+
+class KsTaskLink(models.Model):
+    _name = 'ks.task.link'
+    _description = 'Ks Gantt Task Linking'
+
+    ks_task_link_type = fields.Selection(
+        string='Task Link Type',
+        selection=[('0', 'Finish to start'),
+                   ('1', 'Start to start'),
+                   ('2', 'Finish to finish'),
+                   ('3', 'Start to finish'),
+                   ],
+        required=True, )
+
+    def unlink(self):
+        """
+        Override unlink function to avoid error 'could not serialize access due to concurrent update',
+        this error occur when user tries to delete the record that is already deleted or not exist,
+        problem with this - when this issue occurs then CRUD operations are also stopped working.
+        """
+
+        # Check if request id is already deleted or doesn't exist.
+        for rec in self:
+            try:
+                if not len(self.env['ks.task.link'].search([('id', '=', rec.id)])):
+                    return True
+            except Exception as e:
+                # If id is out of range.
+                return True
+        return super(KsTaskLink, self).unlink()
+