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Odoo CE v19.0 - error when trying to switch to Calendar view in Project

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projectcalendarV19.0
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Marek Matej
Hi all,

In the Odoo 19.0-20250928 (Community Edition), in the Project Tasks, there are several views. All of them work (kanban, list, pivot, activities,..) except the Calendar view. When trying to switch the view, the error message appears "Oops, Something went wrong..." with a detailed error description as follows"

Odoo Server Error

RPC_ERROR
Odoo Server Error

Occured on odoo.mywebsite.com on model project.task on 2025-11-12 17:12:03 GMT

Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/odoo/orm/domains.py", line 914, in __get_field
field = model._fields[field_name]
~~~~~~~~~~~~~^^^^^^^^^^^^
KeyError: 'planned_date_begin'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/odoo/http.py", line 2279, in _serve_db
return service_model.retrying(serve_func, env=self.env)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3/dist-packages/odoo/service/model.py", line 184, in retrying
result = func()
^^^^^^
File "/usr/lib/python3/dist-packages/odoo/http.py", line 2326, in _serve_ir_http
response = self.dispatcher.dispatch(rule.endpoint, args)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3/dist-packages/odoo/http.py", line 2541, in dispatch
result = self.request.registry['ir.http']._dispatch(endpoint)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3/dist-packages/odoo/addons/base/models/ir_http.py", line 357, in _dispatch
result = endpoint(**request.params)
^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3/dist-packages/odoo/http.py", line 788, in route_wrapper
result = endpoint(self, *args, **params_ok)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3/dist-packages/odoo/addons/web/controllers/dataset.py", line 32, in call_kw
return call_kw(request.env[model], method, args, kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3/dist-packages/odoo/service/model.py", line 93, in call_kw
result = method(recs, *args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3/dist-packages/odoo/addons/web/models/models.py", line 63, in web_search_read
records = self.search_fetch(domain, specification.keys(), offset=offset, limit=limit, order=order)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3/dist-packages/odoo/orm/models.py", line 1408, in search_fetch
query = self._search(domain, offset=offset, limit=limit, order=order or self._order)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3/dist-packages/odoo/orm/models.py", line 5361, in _search
domain = domain.optimize_full(self)
^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3/dist-packages/odoo/orm/domains.py", line 445, in optimize_full
return self._optimize(model, OptimizationLevel.FULL)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3/dist-packages/odoo/orm/domains.py", line 459, in _optimize
previous, domain = domain, domain._optimize_step(model, next_level)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3/dist-packages/odoo/orm/domains.py", line 653, in _optimize_step
children = self._flatten(child._optimize(model, level) for child in self.children)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3/dist-packages/odoo/orm/domains.py", line 608, in _flatten
for child in children:
File "/usr/lib/python3/dist-packages/odoo/orm/domains.py", line 653, in <genexpr>
children = self._flatten(child._optimize(model, level) for child in self.children)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3/dist-packages/odoo/orm/domains.py", line 459, in _optimize
previous, domain = domain, domain._optimize_step(model, next_level)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3/dist-packages/odoo/orm/domains.py", line 938, in _optimize_step
field, property_name = self.__get_field(model)
^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3/dist-packages/odoo/orm/domains.py", line 916, in __get_field
self._raise("Invalid field %s.%s", model._name, field_name)
File "/usr/lib/python3/dist-packages/odoo/orm/domains.py", line 901, in _raise
raise error(message % (*args, self.field_expr, self.operator, self.value))
ValueError: Invalid field project.task.planned_date_begin in condition ('planned_date_begin', '=', False)

The above server error caused the following client error:
OwlError: An error occured in the owl lifecycle (see this Error's "cause" property)
Error: An error occured in the owl lifecycle (see this Error's "cause" property)
at handleError (https://odoo.mywebsite.com/web/assets/04c1e82/web.assets_web.min.js:762:101)
at App.handleError (https://odoo.mywebsite.com/web/assets/04c1e82/web.assets_web.min.js:1420:29)
at ComponentNode.initiateRender (https://odoo.mywebsite.com/web/assets/04c1e82/web.assets_web.min.js:854:19)

Caused by: RPC_ERROR: Odoo Server Error
RPC_ERROR
at makeErrorFromResponse (https://odoo.mywebsite.com/web/assets/04c1e82/web.assets_web.min.js:3180:163)
at XMLHttpRequest.<anonymous> (https://odoo.mywebsite.com/web/assets/04c1e82/web.assets_web.min.js:3186:13)


The workaround is to select "All tasks" -> set Calendar -> choose only the desired project name on the right side, under the month view. But I'd rather see this error fixed. Please help or suggest.


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Cybrosys Techno Solutions Pvt.Ltd
Best Answer

Hi,


The error occurs because the Calendar view in Project Tasks is referencing a missing field — planned_date_begin. This field is normally used by Odoo to determine when a task starts on the calendar, but it either doesn’t exist in your database or was removed during customization or migration. As a result, when Odoo tries to load the calendar view, it fails with the “Invalid field project.task.planned_date_begin” error.

To fix this, you can simply activate Developer Mode, locate the project.task.calendar view under Project → Configuration → Views, and edit it. Replace the missing planned_date_begin field with another date field that exists, such as date_deadline, in the XML definition of the view. This will let the calendar display tasks based on their due dates instead.

If you prefer to keep the original structure, you can also restore the missing fields by creating a small custom module that adds planned_date_begin and planned_date_end as datetime fields on the project.task model. Alternatively, upgrading or reinstalling the Project module may restore them automatically.

In short, the issue is caused by the calendar view calling a field that no longer exists. You can solve it either by updating the calendar view to use existing fields like date_deadline or by reintroducing the missing fields through a simple custom module.


Hope it helps

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Codesphere Tech
Best Answer

Hello,
Get pull of the latest code and upgrade the Project module..

Hope it helps.

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