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** Branch linked: lp:~openerp-dev/openobject-server/trunk-bug-789576-nco

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https://bugs.launchpad.net/bugs/789576

Title:
  fields.related override: store function persists

Status in OpenERP Server:
  In Progress

Bug description:
  Hi,

  when a fields.related is overridden by a regular field, the store
  function is not removed. Values assigned to the field by the users of
  the system get overwritten immediately by the store function of the
  original field definition.

  Here is an example from the HR module:

  'parent_id': fields.related('department_id', 'manager_id',
  relation='hr.employee', string='Manager', type='many2one', store=True,
  select=True, readonly=True, help="It is linked with manager of
  Department"),

  We want to override this definition with
  "fields.many2one('hr.employee', 'Manager')", but any write on this
  field triggers a recalculation based on the related field.

  The problem is in orm.__init__() where the list of a model's store
  functions is populated but never purged.

  Reproducable with openerp-server/6.0 rev. 3435.

  Cheers,
  Stefan.

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