Hi I am trying to create a new report, very similar to the order report, in fact only change 1 word.

To do that I have been created a new module with a new report --> "report_albaran.xml" 

<odoo>
    <data>
        <report id="report_albaran"
                string="Imprimir albarán"
                model="sale.order"
                report_type="qweb-pdf"
                name="print_albaran_from_confirmed_order.report_albaran_template"
                print_report_name="'A- %s' % (object.name)"
                
        />

        <template id="report_albaran_template" inherit_id="sale.report_saleorder_document">
            <xpath expr="//h2[@class='mt16']//span" position="replace">
                <span t-field="doc.name"/>
            </xpath>
        </template>
    </data>
</odoo>

The objective is to create a new button in the quotations/orders view and throw xpath method parse the "sale.report_saleorder_document" report to change the variable <span t-field="doc.name"/> for the string "Albarán".

The code presented does not change anything it is only to show that the error occurs anyway.

Can you help me with it?

Regards,

Amadeo

ERROR:

after few lines...

AttributeError: 'NoneType' object has no attribute 'with_context'

Error to render compiling AST
AttributeError: 'NoneType' object has no attribute 'with_context'
Template: sale.report_saleorder_document
Path: /t/t/t[1]
Node: <t t-set="doc" t-value="doc.with_context(lang=doc.partner_id.lang)"/>

It seems that the error is when is trying to look in the parent model.. I don't know why.