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["Yannick Vaucher @ Camptocamp" <893079@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

Hello,

I found that it is impossible to override a method used in a stored
function field.

For exemple, I try to extend account.analytic.line depending on /analytic_multicurrency/account_analytic_line.py .
This for the following fields :

 _columns = {
          'aa_currency_id': fields.function(_get_account_currency, method=True, type='many2one', relation='res.currency', string='Account currency',
                  store={
                      'account.analytic.account': (_get_account_line, ['currency_id','company_id'], 50),
                      'account.analytic.line': (lambda self,cr,uid,ids,c={}: ids, ['amount','unit_amount','product_uom_id'],10),
                  },
                  help="The related analytic account currency."),
          'aa_amount_currency': fields.function(_amount_currency, method=True, digits=(16, int(config['price_accuracy'])), string='Amount currency',
                  store={
                      'account.analytic.account': (_get_account_line, ['currency_id','company_id'], 50),
                      'account.analytic.line': (lambda self,cr,uid,ids,c={}: ids, ['amount','unit_amount','product_uom_id'],10),
                  },
                  help="The amount expressed in the related analytic account currency."),
          'company_id': fields.related('general_account_id', 'company_id', type='many2one', relation='res.company', string='Company', store=True, readonly=True),
    }


Now, here are the problems :
1) To extend the triggers on multi, by adding one new object to check, I have to rewrite the whole store dict
2) I will have to redefine _get_account_line or any trigger method as it seems out of scope for store triggering.
3) I can't use 'super' in rewritten method. -> no override is possible

No inheritance is possible because the 'self' which is given by the
trigger is an instance of the triggering object calling a method of the
triggered object.


I also tried to define the function that way :

from analytic_multicurrency import account_analytic_line
_get_account_line = account_analytic_line.account_analytic_line._get_account_line

Still the error on store load is

 TypeError: unbound method _get_account_line() must be called with
account_analytic_line instance as first argument (got
account.analytic.account instance instead)


The only way I found is to rewrite the whole getter method in my new class. That's a bit dirty.


My running python : Python 2.6.5 (r265:79063, Apr 16 2010, 13:09:56)


Yannick

** Affects: openobject-server
     Importance: Undecided
         Status: New


** Tags: field function override store super trigger

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https://bugs.launchpad.net/bugs/893079

Title:
  [6.1] impossible to call super in ids getter method of store from
  function field : wrong self type

Status in OpenERP Server:
  New

Bug description:
  Hello,

  I found that it is impossible to override a method used in a stored
  function field.

  For exemple, I try to extend account.analytic.line depending on /analytic_multicurrency/account_analytic_line.py .
  This for the following fields :

   _columns = {
            'aa_currency_id': fields.function(_get_account_currency, method=True, type='many2one', relation='res.currency', string='Account currency',
                    store={
                        'account.analytic.account': (_get_account_line, ['currency_id','company_id'], 50),
                        'account.analytic.line': (lambda self,cr,uid,ids,c={}: ids, ['amount','unit_amount','product_uom_id'],10),
                    },
                    help="The related analytic account currency."),
            'aa_amount_currency': fields.function(_amount_currency, method=True, digits=(16, int(config['price_accuracy'])), string='Amount currency',
                    store={
                        'account.analytic.account': (_get_account_line, ['currency_id','company_id'], 50),
                        'account.analytic.line': (lambda self,cr,uid,ids,c={}: ids, ['amount','unit_amount','product_uom_id'],10),
                    },
                    help="The amount expressed in the related analytic account currency."),
            'company_id': fields.related('general_account_id', 'company_id', type='many2one', relation='res.company', string='Company', store=True, readonly=True),
      }

  
  Now, here are the problems :
  1) To extend the triggers on multi, by adding one new object to check, I have to rewrite the whole store dict
  2) I will have to redefine _get_account_line or any trigger method as it seems out of scope for store triggering.
  3) I can't use 'super' in rewritten method. -> no override is possible

  No inheritance is possible because the 'self' which is given by the
  trigger is an instance of the triggering object calling a method of
  the triggered object.

  
  I also tried to define the function that way :

  from analytic_multicurrency import account_analytic_line
  _get_account_line = account_analytic_line.account_analytic_line._get_account_line

  Still the error on store load is

   TypeError: unbound method _get_account_line() must be called with
  account_analytic_line instance as first argument (got
  account.analytic.account instance instead)

  
  The only way I found is to rewrite the whole getter method in my new class. That's a bit dirty.


  My running python : Python 2.6.5 (r265:79063, Apr 16 2010, 13:09:56)

  
  Yannick

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