server-tools/database_cleanup/view/purge_columns.xml

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

        <record id="purge_columns_view" model="ir.ui.view">
            <field name="name">Form view for purge columns wizard</field>
            <field name="model">cleanup.purge.wizard.column</field>
            <field name="arch" type="xml">
                <form string="Purge columns" version="7.0">
                    <h1>
                        <field name="name"/>
                    </h1>
                    <button type="object" name="purge_all" string="Purge all columns" />
                    <button type="object" name="select_lines" string="Select lines" />
                    <field name="purge_line_ids" colspan="4" nolabel="1">
                        <form string="Purge columns">
                            <group>
                                <field name="name" />
                                <field name="model_id" />
                                <field name="purged" invisible="0" />
                            </group>
                            <footer>
                                <button type="object" name="purge"
                                        icon="gtk-cancel" string="Purge this column"
                                        attrs="{'invisible': [('purged', '=', True)]}"/>
                            </footer>
                        </form>
                    </field>
                </form>
            </field>
        </record>

        <record id="action_purge_columns" model="ir.actions.server">
            <field name="name">Purge columns</field>
            <field name="type">ir.actions.server</field>
            <field name="state">code</field>
            <field name="model_id" ref="database_cleanup.model_cleanup_purge_wizard_column" />
            <field name="code">
wizard_id = self.create(cr, uid, {}, context=context)
action = {
    'type': 'ir.actions.act_window',
    'views': [(False, 'form')],
    'res_model': 'cleanup.purge.wizard.column',
    'res_id': wizard_id,
    'flags': {
        'action_buttons': False,
        'sidebar': False,
    },
}
            </field>
        </record>

        <record id="purge_column_line_tree" model="ir.ui.view">
            <field name="model">cleanup.purge.line.column</field>
            <field name="arch" type="xml">
                <tree string="Purge columns">
                    <field name="name" />
                    <field name="model_id" />
                    <field name="purged" invisible="0" />
                    <button type="object" name="purge"
                        icon="gtk-cancel" string="Purge this column"
                        attrs="{'invisible': [('purged', '=', True)]}"/>
                </tree>
            </field>
        </record>

        <record id="action_purge_column_line" model="ir.actions.server">
            <field name="name">Purge</field>
            <field name="type">ir.actions.server</field>
            <field name="state">code</field>
            <field name="model_id" ref="database_cleanup.model_cleanup_purge_line_column" />
            <field name="code">
self.purge(cr, uid, context.get('active_ids', []), context)
            </field>
        </record>

        <record id="action_purge_column_line_value" model="ir.values">
            <field name="name">Purge</field>
            <field name="key">action</field>
            <field name="key2">client_action_multi</field>
            <field name="model">cleanup.purge.line.column</field>
            <field name="value" eval="'ir.actions.server,%d' % ref('database_cleanup.action_purge_column_line')" />
        </record>
    </data>
</openerp>