farm/views/purchase_analytics.xml

<?xml version="1.0" encoding="UTF-8"?>
<openerp>
<data>

    <record model="ir.ui.view" id="farm_purchase_order_form_inherit">
        <field name="name">farm.purchase.order.form.inherit</field>
        <field name="model">purchase.order</field>
        <field name="inherit_id" ref="purchase.purchase_order_form"/>
        <field name="arch" type="xml">
            <button name="action_cancel" position="after">
                <field name="imputed" attrs="{'invisible': True}"/>
                <button name="set_purchase_analitics" states="draft,confirmed" string="Set Analitics"
                type="object" attrs="{'invisible': [('imputed', '=', True)]}"/>
            </button>
            <xpath expr="//field[@name='order_line']/tree" position="inside">
                <field name="farm"/>
                <field name="location_id"/>
                <field name="start_date" attrs="{'required': ['|',('farm', '!=', False),('general_expense', '=', True)]}"/>
                <field name="end_date" attrs="{'required': ['|',('farm', '!=', False),('general_expense', '=', True)]}"/>
                <field name="general_expense"/>
            </xpath>
        </field>
    </record>
    <record model="ir.ui.view" id="view_farm_purchase_line_tree">
            <field name="name">farm.purchase.line.tree</field>
            <field name="model">purchase.order.line</field>
            <field name="type">tree</field>
            <field name="arch" type="xml">
                <tree string="Purchase lines">
                    <field name="product_id"/>
                    <field name="farm"/>
                    <field name="location_id"/>
                    <field name="start_date"/>
                    <field name="end_date"/>
                    <field name="aux_price_subtotal" sum="Tot. price"/>
                    <field name="imputed"/>
                </tree>
            </field>
        </record>
        <record model="ir.ui.view" id="view_farm_purchase_line_form">
            <field name="name">farm.purchase.line.form</field>
            <field name="model">purchase.order.line</field>
            <field name="type">form</field>
            <field name="arch" type="xml">
                <form string="Purchase line">
                    <sheet>
                        <group col="4" colspan="2">
                            <field name="order_id" attrs="{'readonly':True}"/>
                            <field name="farm"/>
		                    <field name="location_id"/>
		                    <field name="start_date"/>
		                    <field name="end_date"/>
		                    <field name="price_subtotal" attrs="{'readonly':True}"/>
		                    <field name="imputed" attrs="{'readonly':True}"/>
                        </group>
                    </sheet>
                  </form>
             </field>
             </record>
    <record model="ir.ui.view" id="farm_purchase_line_search_view">
            <field name="name">farm.purchase.line.search</field>
            <field name="model">purchase.order.line</field>
            <field name="arch" type="xml">
                <search string="Search Animal group">
                    <group>
                        <field name="farm"/>
                        <field name="location_id"/>
                        <field name="product_id"/>
                        <field name="start_date"/>
                    </group>
                    <newline />
                    <group expand="0" string="Group by...">
                        <filter string="Farm"
                                domain="[]"
                                context="{'group_by': 'farm'}" />
                        <filter string="Product"
                                domain="[]"
                                context="{'group_by': 'product_id'}" />
                        <filter string="Location"
                                domain="[]"
                                context="{'group_by': 'location'}" />
                        <filter string="month"
                                domain="[]"
                                context="{'group_by': 'start_date:month'}" />
                    </group>
                </search>
             </field>
       </record>
       <record id="impute_analitics_action" model="ir.actions.server">
        <field name="name">Impute analitics</field>
        <field name="type">ir.actions.server</field>
        <field name="model_id" ref="model_purchase_order_line"/>
        <field name="state">code</field>
        <field name="code">self.browse(cr,uid,context.get('active_ids', [])).impute_purchase_order()</field>
</record>
<record id="impute analitics" model="ir.values">
        <field name="name">impute_analitics</field>
        <field name="key">action</field>
        <field name="key2">client_action_multi</field>
        <field name="model">purchase.order.line</field>
        <field name="value" eval="'ir.actions.server,%d'%impute_analitics_action"/>
      
</record>
</data>
</openerp>