title: After OpenERP 7 upgrade "ERROR: relation "ir_model_constraint" does not exist"
body: <p>I'd been using OpenERP 6 OK and decided to upgrade to version 7.</p>
  
  <p>I downloaded openerp_7.0alpha-20121206-000102-1_all.deb from <a href="http://nightly.openerp.com/trunk/nightly/deb/" rel="nofollow">http://nightly.openerp.com/trunk/nightly/deb/</a> and installed it. Now when I browse to <code>http://localhost:8069</code> I can no longer select the database (because when there is one DB there is no reason to show the selector,) and after log in I get:</p>
  
  <pre><code>OpenERP Server Error
  Client Traceback (most recent call last):
    File "/usr/lib/pymodules/python2.7/openerp/addons/web/http.py", line 195, in dispatch
      response["result"] = method(self, **self.params)
    File "/usr/lib/pymodules/python2.7/openerp/addons/web/controllers/main.py", line 833, in authenticate
      req.session.authenticate(db, login, password, env)
    File "/usr/lib/pymodules/python2.7/openerp/addons/web/session.py", line 113, in authenticate
      uid = self.proxy('common').authenticate(db, login, password, env)
    File "/usr/lib/pymodules/python2.7/openerp/addons/web/session.py", line 28, in proxy_method
      result = self.session.send(self.service_name, method, *args)
    File "/usr/lib/pymodules/python2.7/openerp/addons/web/session.py", line 101, in send
      raise xmlrpclib.Fault(openerp.tools.exception_to_unicode(e), formatted_info)
  
  
  Server Traceback (most recent call last):
    File "/usr/lib/pymodules/python2.7/openerp/addons/web/session.py", line 87, in send
      return openerp.netsvc.dispatch_rpc(service_name, method, args)
    File "/usr/lib/pymodules/python2.7/openerp/netsvc.py", line 361, in dispatch_rpc
      result = ExportService.getService(service_name).dispatch(method, params)
    File "/usr/lib/pymodules/python2.7/openerp/service/web_services.py", line 413, in dispatch
      return fn(*params)
    File "/usr/lib/pymodules/python2.7/openerp/service/web_services.py", line 424, in exp_authenticate
      res_users = pooler.get_pool(db).get('res.users')
    File "/usr/lib/pymodules/python2.7/openerp/pooler.py", line 50, in get_pool
      return get_db_and_pool(db_name, force_demo, status, update_module)[1]
    File "/usr/lib/pymodules/python2.7/openerp/pooler.py", line 33, in get_db_and_pool
      registry = RegistryManager.get(db_name, force_demo, status, update_module, pooljobs)
    File "/usr/lib/pymodules/python2.7/openerp/modules/registry.py", line 156, in get
      update_module, pooljobs)
    File "/usr/lib/pymodules/python2.7/openerp/modules/registry.py", line 178, in new
      openerp.modules.load_modules(registry.db, force_demo, status, update_module)
    File "/usr/lib/pymodules/python2.7/openerp/modules/loading.py", line 296, in load_modules
      loaded_modules, processed_modules = load_module_graph(cr, graph, status, perform_checks=(not update_module), report=report)
    File "/usr/lib/pymodules/python2.7/openerp/modules/loading.py", line 164, in load_module_graph
      init_module_models(cr, package.name, models)
    File "/usr/lib/pymodules/python2.7/openerp/modules/module.py", line 373, in init_module_models
      result = obj._auto_init(cr, {'module': module_name})
    File "/usr/lib/pymodules/python2.7/openerp/osv/orm.py", line 3211, in _auto_init
      self._add_sql_constraints(cr)
    File "/usr/lib/pymodules/python2.7/openerp/osv/orm.py", line 3350, in _add_sql_constraints
      self._save_constraint(cr, conname, 'u')
    File "/usr/lib/pymodules/python2.7/openerp/osv/orm.py", line 2859, in _save_constraint
      """, (constraint_name, self._module))
    File "/usr/lib/pymodules/python2.7/openerp/sql_db.py", line 162, in wrapper
      return f(self, *args, **kwargs)
    File "/usr/lib/pymodules/python2.7/openerp/sql_db.py", line 227, in execute
      res = self._obj.execute(query, params)
  ProgrammingError: relation "ir_model_constraint" does not exist
  LINE 2:             SELECT 1 FROM ir_model_constraint, ir_module_mod...
                                    ^
  </code></pre>
  
  <p>So I try to run it manually like:</p>
  
  <pre><code>sudo openerp-server stop
  su - openerp
  openerp-server -d openerp1 -u all
  </code></pre>
  
  <p>and I get            </p>
  
  <pre><code>2012-12-07 07:00:43,417 7584 ERROR openerp1 openerp: Failed to initialize database `openerp1`.
  Traceback (most recent call last):
    File "/usr/lib/pymodules/python2.7/openerp/cli/server.py", line 97, in preload_registry
      db, registry = openerp.pooler.get_db_and_pool(dbname, update_module=openerp.tools.config['init'] or openerp.tools.config['update'], pooljobs=False)
    File "/usr/lib/pymodules/python2.7/openerp/pooler.py", line 33, in get_db_and_pool
      registry = RegistryManager.get(db_name, force_demo, status, update_module, pooljobs)
    File "/usr/lib/pymodules/python2.7/openerp/modules/registry.py", line 156, in get
      update_module, pooljobs)
    File "/usr/lib/pymodules/python2.7/openerp/modules/registry.py", line 178, in new
      openerp.modules.load_modules(registry.db, force_demo, status, update_module)
    File "/usr/lib/pymodules/python2.7/openerp/modules/loading.py", line 296, in load_modules
      loaded_modules, processed_modules = load_module_graph(cr, graph, status, perform_checks=(not update_module), report=report)
    File "/usr/lib/pymodules/python2.7/openerp/modules/loading.py", line 164, in load_module_graph
      init_module_models(cr, package.name, models)
    File "/usr/lib/pymodules/python2.7/openerp/modules/module.py", line 373, in init_module_models
      result = obj._auto_init(cr, {'module': module_name})
    File "/usr/lib/pymodules/python2.7/openerp/osv/orm.py", line 3211, in _auto_init
      self._add_sql_constraints(cr)
    File "/usr/lib/pymodules/python2.7/openerp/osv/orm.py", line 3350, in _add_sql_constraints
      self._save_constraint(cr, conname, 'u')
    File "/usr/lib/pymodules/python2.7/openerp/osv/orm.py", line 2859, in _save_constraint
      """, (constraint_name, self._module))
    File "/usr/lib/pymodules/python2.7/openerp/sql_db.py", line 162, in wrapper
      return f(self, *args, **kwargs)
    File "/usr/lib/pymodules/python2.7/openerp/sql_db.py", line 227, in execute
      res = self._obj.execute(query, params)
  ProgrammingError: relation "ir_model_constraint" does not exist
  LINE 2:             SELECT 1 FROM ir_model_constraint, ir_module_mod...
  </code></pre>
  
  <p>What can I do, or should I have done to upgrade?</p>