Limitations
At the time of writing, Odoo uses user.share == False and
user.has_group("base.group_user") == True to give the backend access
to user.
So technically, the module does 2 things :
- It sets the share parameter to False for group_backend
users.
- It hijacks the has_group method of res.users by returning True
for group_backend users when the requested group is
base.group_user
This avoids to write a lot of overwrite in different controllers from
different modules (‘portal’, ‘web’, ‘base’, ‘website’) with hard coded
statements that check if user is part of the base.group_user or
share == False group.
Important
This is an alpha version, the data model and design can change at any time without warning.
Only for development or testing purpose, do not use in production.
More details on development status
Table of contents
To allow a user from the group_backend_ui_users group to interact
with a specific model you can either add an access rules to this model
for group_backend_ui_users or you can add group_backend_ui_users
to the implied_ids of a new specific group.
The Backend groups are from the “User types” category
(base.module_category_user_type), the same category as “Internal
User” (base.group_user), “Portal” (base.group_portal) or Public
(base.group_public). Be aware that a user can only belongs to one
group of this category.
To use this module, add a user to the group “Backend user” or “Backend
UI user” through the user’s form page.

If you created a specific group with group_backend or
group_backend_ui_users in its implied_ids, you need to go
through the group’s form page in order to add the user to this specific
group, because it won’t be displayed on the user’s form page (a specific
group with its own category is displayed on user’s form page only if the
group inherits the “Internal user” group).
This module also restricts the root menus displayed to Backend
users, so be sure to explicitly add your Backend group to all the
necessary root menus for these users.
Bugs are tracked on GitHub Issues.
In case of trouble, please check there if your issue has already been reported.
If you spotted it first, help us to smash it by providing a detailed and welcomed
feedback.
Do not contact contributors directly about support or help with technical issues.
Maintainers
This module is maintained by the OCA.
OCA, or the Odoo Community Association, is a nonprofit organization whose
mission is to support the collaborative development of Odoo features and
promote its widespread use.
Current maintainers:

This module is part of the OCA/server-backend project on GitHub.
You are welcome to contribute. To learn how please visit https://odoo-community.org/page/Contribute.