I have created a simple module. This is the view:

 <?xml version="1.0" encoding="utf-8"?>
<openerp>
	<data>
		<record id="view_test_1" model="ir.ui.view"> 
    		<field name="name">Test 1</field>
    		<field name="model">test.tbl_1</field>
    		<field name="arch" type="xml">
        		<form string="Test 1">
        			<sheet>
        				<group name="top">
        					<group name="left">
        						<field name="code_1"/>
        					</group>
							<group name="left">
								<field name="description_1"/>
							</group>
						</group>
					</sheet>
		        </form>
		    </field>
		</record>
		
		<record id="view_test_2" model="ir.ui.view"> 
    		<field name="name">Test 2</field>
    		<field name="model">test.tbl_2</field>
    		<field name="arch" type="xml">
        		<form string="Test 2">
        			<sheet>
        				<group name="top">
        					<group name="left">
        						<field name="code_2"/>
        					</group>
							<group name="left">
								<field name="description_2"/>
							</group>
						</group>
					</sheet>
		        </form>
		    </field>
		</record>
		
		<!-- Action to open To-do Task list -->
		<act_window id="action_test_1" name="Attivita" res_model="test.table_1" view_mode="tree,form" />
		<act_window id="action_test_2" name="Servizio" res_model="test.table_2" view_mode="tree,form" />
		<!-- Menu item to open To-do Task list -->
	  	<menuitem id="menu_test_1" name="Menu test 1" parent="mail.mail_feeds" sequence="20" action="action_test_1" />
	  	<menuitem id="menu_test_2" name="Menu test 2" parent="mail.mail_feeds" sequence="30" action="action_test_2" />
		
	</data>
</openerp>

and this is my model:

# -*- encoding: utf-8 -*-
from openerp import models, fields

class test_1(models.Model):
        _name = 'test.table_1'
        _description = 'Table 1'

        code_1 =  fields.Char('Code', size=1, help="Insert your code", required=True)
        description_1 = fields.Text('Description', help="Insert a description", required=True)
        
class test_2(models.Model):
        _name = 'test.table_2'
        _description = 'Table 2'

        code_2 =  fields.Char('Code', size=1, help="Insert your code", required=True)
        description_2 = fields.Text('Description', help="Insert a description", required=True) 

So, I have two links in the "messaging" menu, one for each action.

Instead, I need only one link to a view with two forms. I would like to chose which one to fill (only one or both).

Anyone coul help me? Thanks in advance!