User __default shown in demo.frappecloud.com and save failed.

[Y Y]

Traceback (innermost last):
  File "/home/erpnext/frappe-bench/apps/frappe/frappe/widgets/form/save.py", line 18, in savedocs
    doc.save()
  File "/home/erpnext/frappe-bench/apps/frappe/frappe/model/document.py", line 169, in save
    self.insert()
  File "/home/erpnext/frappe-bench/apps/frappe/frappe/model/document.py", line 156, in insert
    self.run_post_save_methods()
  File "/home/erpnext/frappe-bench/apps/frappe/frappe/model/document.py", line 433, in run_post_save_methods
    self.run_method("on_update")
  File "/home/erpnext/frappe-bench/apps/frappe/frappe/model/document.py", line 406, in run_method
    return Document.hook(fn)(self, *args, **kwargs)
  File "/home/erpnext/frappe-bench/apps/frappe/frappe/model/document.py", line 484, in composer
    return composed(self, method, *args, **kwargs)
  File "/home/erpnext/frappe-bench/apps/frappe/frappe/model/document.py", line 467, in runner
    add_to_return_value(self, fn(self, *args, **kwargs))
  File "/home/erpnext/frappe-bench/apps/frappe/frappe/model/document.py", line 400, in 
    fn = lambda self, *args, **kwargs: getattr(self, method)(*args, **kwargs)
  File "/home/erpnext/frappe-bench/apps/frappe/frappe/core/doctype/communication/communication.py", line 32, in on_update
    self.update_parent()
  File "/home/erpnext/frappe-bench/apps/frappe/frappe/core/doctype/communication/communication.py", line 28, in update_parent
    parent_doc = self.get_parent_doc()
  File "/home/erpnext/frappe-bench/apps/frappe/frappe/core/doctype/communication/communication.py", line 24, in get_parent_doc
    return frappe.get_doc(self.parenttype, self.parent)
  File "/home/erpnext/frappe-bench/apps/frappe/frappe/__init__.py", line 347, in get_doc
    return frappe.model.document.get_doc(arg1, arg2)
  File "/home/erpnext/frappe-bench/apps/frappe/frappe/model/document.py", line 22, in get_doc
    doctype = arg1.get("doctype")
 AttributeError: 'NoneType' object has no attribute 'get'

Traceback (innermost last):
  File "/home/erpnext/frappe-bench/apps/frappe/frappe/app.py", line 49, in application
    response = frappe.handler.handle()
  File "/home/erpnext/frappe-bench/apps/frappe/frappe/handler.py", line 66, in handle
    execute_cmd(cmd)
  File "/home/erpnext/frappe-bench/apps/frappe/frappe/handler.py", line 89, in execute_cmd
    ret = frappe.call(method, **frappe.form_dict)
  File "/home/erpnext/frappe-bench/apps/frappe/frappe/__init__.py", line 526, in call
    return fn(*args, **newargs)
  File "/home/erpnext/frappe-bench/apps/frappe/frappe/widgets/form/save.py", line 18, in savedocs
    doc.save()
  File "/home/erpnext/frappe-bench/apps/frappe/frappe/model/document.py", line 169, in save
    self.insert()
  File "/home/erpnext/frappe-bench/apps/frappe/frappe/model/document.py", line 156, in insert
    self.run_post_save_methods()
  File "/home/erpnext/frappe-bench/apps/frappe/frappe/model/document.py", line 433, in run_post_save_methods
    self.run_method("on_update")
  File "/home/erpnext/frappe-bench/apps/frappe/frappe/model/document.py", line 406, in run_method
    return Document.hook(fn)(self, *args, **kwargs)
  File "/home/erpnext/frappe-bench/apps/frappe/frappe/model/document.py", line 484, in composer
    return composed(self, method, *args, **kwargs)
  File "/home/erpnext/frappe-bench/apps/frappe/frappe/model/document.py", line 467, in runner
    add_to_return_value(self, fn(self, *args, **kwargs))
  File "/home/erpnext/frappe-bench/apps/frappe/frappe/model/document.py", line 400, in 
    fn = lambda self, *args, **kwargs: getattr(self, method)(*args, **kwargs)
  File "/home/erpnext/frappe-bench/apps/frappe/frappe/core/doctype/communication/communication.py", line 32, in on_update
    self.update_parent()
  File "/home/erpnext/frappe-bench/apps/frappe/frappe/core/doctype/communication/communication.py", line 28, in update_parent
    parent_doc = self.get_parent_doc()
  File "/home/erpnext/frappe-bench/apps/frappe/frappe/core/doctype/communication/communication.py", line 24, in get_parent_doc
    return frappe.get_doc(self.parenttype, self.parent)
  File "/home/erpnext/frappe-bench/apps/frappe/frappe/__init__.py", line 347, in get_doc
    return frappe.model.document.get_doc(arg1, arg2)
  File "/home/erpnext/frappe-bench/apps/frappe/frappe/model/document.py", line 22, in get_doc
    doctype = arg1.get("doctype")
 AttributeError: 'NoneType' object has no attribute 'get'

[Anand Doshi]

Yang,

Can you give us a list of steps to reproduce this error?

-Anand.

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[Y Y]

Sorry, i shall added it,

In Support ticket -> Communication -> New, at the end of page, there is __Default, sometimes, it failed to save. 

在 2014年8月28日星期四UTC+8下午5时24分33秒，Y Y写道：