Hi, 

I´m trying to create a base module with some other modules extending it, and adding more functionality to this base module.

In order to extend de base module, I´m using inheritance without changing the _name field, using only the field _inherit. (I´ll copy my code at the end).

To extend the views of the model I´m using extension inheritance.

Everything works fine the first time I install all modules, but when I try to update the base module, the server will throw and exception because it can´t find the fields from the subclases for the already extended view.

I´ve managed to make it work running an sql script that erase this views. But i would like not to do that, just get the base module updated clicking on the update button of the module. 

I´ll copy my code now.

class document(models.Model):
 
       _name = 'document_control_base.document' 
       
       @api.model 
       def _get_resources_list(self):
        
            model_obj = self.env['document_control_base.resource_type']         
            return model_obj._get_resources_list() 
    
        
       STATE_SELECTION = [('active', 'Vigente'),('to_expire', 'Proximo a vencer'),('expired', 'Vencido')]

       name = fields.Char("Nombre",readonly=True,store=True,compute='_compute_name')       
       document_name_id =  fields.Many2one("document_control_base.document_name","Nombre del documento")         
       document_condition_ids = fields.Many2many("document_control_base.document_condition", "document_condition_rel", "document_id", "condition_id", "Condiciones del documento")
    
       res_partner_id = fields.Many2one("res.partner",string="Empresa/Recurso Externo")
...

class document(models.Model):
    
    _inherit = 'document_control_base.document'
         
    fleet_vehicle_id = fields.Many2one("fleet.vehicle",string="Vehiculo")
    

    @api.one    
    @api.depends('file_name','res_partner_id','document_name_id','state','fleet_vehicle_id')    
    def _compute_name(self):
        
        super(document, self)._compute_name()        
    
    resid = self.fleet_vehicle_id.name if self.fleet_vehicle_id.name else ''
    self.name = resid.title()  + self.name
...
<record id="document_control_base.document_form" model="ir.ui.view">			
<field name="model">document_control_base.document</field>			
<field name="arch" type="xml">				
<form string="Documentos">					
<sheet>						
<label for="name" class="oe_edit_only" />						
<h1>							
<field name="name"  class="oe_edit_only"  />						
</h1>												
<group>										
<field name="res_type" class="oe_edit_only oe_inline" widget="radio"/>						
<field name="res_partner_id" domain="['|','&amp;','&amp;','&amp;',('is_company', '=', False),('parent_id', '!=', False),															 			
('active', '=', True),('employee','=',False),'&amp;','&amp;','&amp;',('is_company', '=', True),('parent_id', '=', False),('active', '=', True),('employee','=',False)]" 								 
attrs="{'invisible':[('res_type', '!=', 'res.partner')]}"  class="oe_edit_only"/>						
</group>												
<group>							
<group>								
<field name="file_binary" filename="file_name" />								
<field name="file_name" class="oe_inline oe_right"									invisible="1" />								
<field name="document_name_id" domain="[('res_type','=',res_type)]"/>								
<field name="document_condition_ids" widget="many2many_tags" />								
<field name="description" />							
</group>						
</group>						
<group>
								
<field name="no_expiration" />								
<field name="expiration_id" 									
attrs="{'invisible':[('no_expiration','=',True)]}"									
context="{'form_view_ref': 'document_control_base.expiration_form','resources':'expirations','name':'Vencimiento:','res_partner_id':res_partner_id,'document_name_id':document_name_id}" />								
<field name="in_renewal" />								
<field name="state" readonly="1" class="oe_edit_only" />						
</group>					
</sheet>				
</form>			
</field>		
</record>
....
<record model="ir.ui.view" id="document_control_base.document_form_fleet">	 
<field name="model">document_control_base.document</field>      
<field name="inherit_id" ref="document_control_base.document_form" />      
<field name="arch" type="xml">      	      	
<field name="res_partner_id" position="after">					
<label for="fleet_vehicle_id" attrs="{'invisible':[('res_type', '!=', 'fleet.vehicle')]}" class="oe_edit_only" />					
<field name="fleet_vehicle_id" attrs="{'invisible':[('res_type', '!=', 'fleet.vehicle')]}" class="oe_edit_only"/>      	
</field>
		
<field name="expiration_id" position="attributes">				
<attribute name="context">{'form_view_ref': 'document_control_base.expiration_form','resources':'expirations','name':'Vencimiento:','res_partner_id':res_partner_id,'fleet_vehicle_id':fleet_vehicle_id,'document_name_id':document_name_id}</attribute><!--             <attribute name="context" add=" py.PY_setItem(py.evaluate(expr.first, context),'fleet_vehicle_id', fleet_vehicle_id)" separator=" "></attribute> -->            		
</field>
	  
</field>	 
</record>