Hi, I'm trying to modify the module fleet but i have this error when i try to add a new field: TypeError: The model "fleet.vehicle" specifies an unexisting parent class "fleet.vehicle" You may need to add a dependency on the parent class' module.
I'm working with openerp 7
__openerp.py
    enter code here{
    'name': 'flt',
    'version': '0.1',
    'category': 'Tools',
    'description': """Module gestion de transport""",
    'author': 'Oumaima Hilali',
    'website': 'http://openerp.com',
    'depends': ['mail','fleet'],
    'data': [
         'fleet_view.xml',
    ],
    'demo': [],
    'test':[],
    'installable': True,
    'images': [],
}
fleet.py
class fleet_vehicle(osv.osv):
    _name = 'fleet.vehicle'
    _inherit='fleet.vehicle'
    _columns = {
      'type':fields.char('Type', size=64, required=True),
    }
fleet_vehicle()
fleet_view.xml
<?xml version="1.0" encoding="utf-8"?>
<openerp>
    <data>
    <record model="ir.ui.view" id="view_fleet_inherit">
        <field name="name">fleet.vehicle.form.inherit</field>   
        <field name="model">fleet.vehicle</field>
        <field name="type">form</field>
        <field name="inherit_id" ref="fleet.fleet_vehicle_form">form</field>
        <field name="arch" type="xml">
        <field name="model_id" position="after">
          <field name="type" colspan="6"/>
        </field>
        </field>
    </record>               
</record>   
 </data>
</openerp>
