Odoo 8 qweb report style modification - css

Question

I am trying to modify my qweb report contents in Oddo 8 I am using div position. I want to hide fax field on print view. How can i do? It is not working.I am trying to css like display none.
Here below is my code
this is my final code
<openerp>
<data>
<template id="report_picking_inherit_demo" inherit_id="stock.report_picking">
<xpath expr="//div[hasclass('page')]/div[hasclass('row')]" position="replace">
<div class="col-xs-6">
<div t-if="o.picking_type_id.code=='incoming' and o.partner_id">
<span>
<strong>Supplier Address:</strong>
</span>
</div>
<div t-if="o.picking_type_id.code=='internal' and o.partner_id">
<span>
<strong>Warehouse Address:</strong>
</span>
</div>
<div t-if="o.picking_type_id.code=='outgoing' and o.partner_id">
<span>
<strong>Customer Addresswww:</strong>
</span>
</div>
<div t-if="o.partner_id" name="partner_header">
<div t-field="o.partner_id"
t-field-options='{"widget": "contact", "fields": ["address", "name", "phone"], "no_marker": true}'/>
</div>
</div>
<div class="col-xs-5 col-xs-offset-1">
<div t-if="o.move_lines and o.move_lines[0].partner_id and o.move_lines[0].partner_id.id != o.partner_id.id">
<span>
<strong>Delivery Address:</strong>
</span>
<div t-field="o.move_lines[0].partner_id"
t-field-options='{"widget": "contact", "fields": ["address", "name", "phone","fax"], "no_marker": true}'/>
</div>
<div t-if="o.picking_type_id.code != 'internal' and (not o.move_lines or not o.move_lines[0].partner_id) and o.picking_type_id.warehouse_id.partner_id">
<span>
<strong>Warehouse Address:</strong>
</span>
<div t-field="o.picking_type_id.warehouse_id.partner_id"
t-field-options='{"widget": "contact", "fields": ["address", "name", "phone","fax"], "no_marker": true}'/>
</div>
</div>
</xpath>
</template>
</data>
Here I entered fax something example
https://i.stack.imgur.com/iIUCo.png
after that this result
https://i.stack.imgur.com/ukxTI.png]

Answer 1

Remove field 'fax' from the list,
*.xml
<div t-field="o.partner_id"
t-field-options='{"widget": "contact", "fields": ["address", "name", "phone"], "no_marker": true}'/>

Answer 2

You need to remove fax attribute from t-options and you can achieve that by inheriting the original template and overriding <div t-field="o.partner_id"... element.
<template id="custom_report_picking" inherit_id="stock.report_picking">
<xpath expr="//t/t/t/t/div/div/div/div[2]/div" position="replace">
<div t-field="o.partner_id"
t-field-options='{"widget": "contact", "fields": ["address", "name", "phone"], "no_marker": true}'/>
</xpath>
</template>