farm/views/abstract_event.xml

<?xml version="1.0" encoding="UTF-8"?>
<openerp>
<data>
        <record model="ir.ui.view" id="view_abstract_event_tree">
            <field name="name">abstract_event.tree</field>
            <field name="model">farm.event</field>
            <field name="type">tree</field>
            <field name="arch" type="xml">
                <tree string="Event">
                        <field name="state"/>
                        <field name="lot"/>
                        <field name="animal_type"/>
                </tree>
            </field>
        </record>
        <record model="ir.ui.view" id="view_abstract_event_form">
            <field name="name">abstract_event.form</field>
            <field name="model">farm.event</field>
            <field name="type">form</field>
            <field name="arch" type="xml">
                <form string="Event">
                <header>
                    <field name="state" widget="statusbar" statusbar_visible="draft,validated" statusbar_colors='{"invoice_except":"red","waiting_date":"blue"}'/>
                </header>
                <sheet>
                    <group col="4" colspan="2" attrs="{'readonly': [('state', '=', 'validated')]}">
                        <field name="animal_type"/>
                        <field name="farm"/>
                        <field name="specie"/>
                        <field name="animal" 
                            attrs="{'invisible':[('animal_type','=','group')],
                            'required':['|',('animal_type','=','individual'),('animal_type','=', 'male'),('animal_type','=', 'female')]}"
                            domain="[('type', '=', animal_type),('farm', '=', farm)]"/>
                        <field name="animal_group"
                            attrs="{'invisible':[('animal_type','!=','group')],'required':[('animal_type','=','group')]}"
                            domain="[('farm', '=', farm), ('state', '!=', 'sold')]"/>
                        <field name="lot"/>
                    </group>
                    <group col="4" colspan="2">
                        <field name="timestamp"/>
                        <field name="employee"/>
                    </group>
                    <group>
                        <field name="notes"/>
                    </group>
                </sheet>
                </form>
            </field>
        </record>
        <record id="view_abstract_event_import_mixin_tree" model="ir.ui.view">
            <field name="name">abstract_event.import_mixin.tree</field>
            <field name="model">farm.event.import.mixin</field>
            <field name="inherit_id" ref="view_abstract_event_tree"/>
            <field name="arch" type="xml">
                <field name="animal_type" position="after">
                        <field name="imported"/>
                </field>
            </field>
        </record>
        <record id="view_abstract_event_import_mixin_form" model="ir.ui.view">
            <field name="name">abstract_event.import_mixin.form</field>
            <field name="model">farm.event.import.mixin</field>
            <field name="inherit_id" ref="view_abstract_event_form"/>
            <field name="arch" type="xml">
                <field name="lot" position="after">
                        <field name="imported"/>
                </field>
            </field>
        </record> 
</data>
</openerp>