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[Bug 598454] Re: ORM: search should return empty list when meeting a NULL many2one in the middle of the evaluation of a chained domain expression.

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From: Launchpad Bug Tracker <598454@xxxxxxxxxxxxxxxxxx>
Date: Wed, 29 Dec 2010 17:43:25 -0000
Reply-to: Bug 598454 <598454@xxxxxxxxxxxxxxxxxx>
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** Branch linked: lp:openobject-server

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https://bugs.launchpad.net/bugs/598454

Title:
  ORM: search should return empty list when meeting a NULL many2one in the middle of the evaluation of a chained domain expression.

Status in OpenObject Server:
  Fix Released

Bug description:
  Search should return empty list when meeting a NULL many2one in the middle of the evaluation of a chained domain expression.

Given the record rule domain:
   [('employee_id.department_id.manager_id.user_id.id', '=', user.id)]
Without the patch, the domain also matches objects whose employee is not in a department, i.e. it explicitly searches for object for which 'employee_id.department_id IS NULL'.
This behavior is a security risk (potential information leakage).

I guess there could be a better way than my patch to handle this.