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["Vinay Rana \(openerp\)" <802352@xxxxxxxxxxxxxxxxxx>]

Hello Nhomar,

I have checked similar issue with latest stable and trunk code but did not face any traceback while updating the exiting db.
Would you please provide me more steps to reproduce the same traceback at my end.

Thanks.

** Changed in: openobject-server
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/802352

Title:
  [6.0] Inheriting _constraints "list index out of range" if original
  len(_constraint ) is bigger than the new one

Status in OpenERP Server:
  Incomplete

Bug description:
  branch: 6.0
  addons : 4677
  server: 3452
  My module example:
  class stock_move_constraint(osv.osv):   
      _inherit = 'stock.move'
      _columns = {}
      def _check_import_info(self, cr, uid, ids, context=None):
          print "I checked"
          return True
      _constraints = [
          (_check_import_info,'You must assign a track lot with import information for this product',['tracking_id'])],
  stock_move_constraint()

  When I try to update my module ($python openerp-server.py -u mymodule
  -d mydb) this traceback is received.

  Traceback (most recent call last):
    File "./openerp-server.py", line 121, in <module>
      db,pool = pooler.get_db_and_pool(dbname, update_module=tools.config['init'] or tools.config['update'], pooljobs=False)
    File "/home/nhomar/CD_curso/linux_and_sources/server/bin/pooler.py", line 39, in get_db_and_pool
      addons.load_modules(db, force_demo, status, update_module)
    File "/home/nhomar/CD_curso/linux_and_sources/server/bin/addons/__init__.py", line 883, in load_modules
      processed_modules.extend(load_module_graph(cr, graph, status, report=report, skip_modules=processed_modules))
    File "/home/nhomar/CD_curso/linux_and_sources/server/bin/addons/__init__.py", line 717, in load_module_graph
      modules = pool.instanciate(package.name, cr)
    File "/home/nhomar/CD_curso/linux_and_sources/server/bin/osv/osv.py", line 258, in instanciate
      res.append(klass.createInstance(self, module, cr))
    File "/home/nhomar/CD_curso/linux_and_sources/server/bin/osv/osv.py", line 354, in createInstance
      if new[c2][2]==c[2] and (new[c2][0] == c[0] \
  IndexError: list index out of range

  I printed variables of this method (check patch it is corrected) and
  some kind of bad logic is used, the server is trying to check as a
  list an integer....

  Original problem
  ~~~~LINE 348 on osv.py

                          if s=='_constraints':
                              for c in cls.__dict__.get(s, []):
                                  exist = False
                                  for c2 in range(len(new)):
   ####THIS IS MY PRINT it is an integer,,,,, 
  #on the range(len(new)) always will return an index in c2 of the original class never, and if the original 
  #_constraint list in class is bigger than the new one it will broke.
                                       print c2 
                                       #For _constraints, we should check field and methods as well
                                       if new[c2][2]==c[2] and (new[c2][0] == c[0] \
                                              or getattr(new[c2][0],'__name__', True) == \
                                                  getattr(c[0],'__name__', False)):
                                          # If new class defines a constraint with
                                          # same function name, we let it override
                                          # the old one.
                                          new[c2] = c
                                          exist = True
                                          break
                                  if not exist:
                                      new.append(c)

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