Open

To overload an existing report you need to call you report id with the id of the report to overload

Report in context menu

<report
    id="account_invoices"
    model="account.invoice"
    string="Invoices"
    report_type="qweb-pdf"
    name="account.report_invoice"
    file="account.report_invoice"
    attachment_use="True"
    attachment="(object.state in ('open','paid')) and
        ('INV'+(object.number or '').replace('/','')+'.pdf')"
/>

Minimal Template

<template id="report_invoice">
    <t t-call="web.html_container">
        <t t-foreach="docs" t-as="o">
            <t t-call="web.external_layout">
                <div class="page">
                    <h2>Report title</h2>
                    <p>This object's name is <span t-field="o.name"/></p>
                </div>
            </t>
        </t>
    </t>
</template>

Translate Template

<!-- Main template -->
<template id="report_saleorder">
    <t t-call="web.html_container">
        <t t-foreach="docs" t-as="doc">
            <t t-call="sale.report_saleorder_document" t-lang="doc.partner_id.lang"/>
        </t>
    </t>
</template>

<!-- Translatable template -->
<template id="report_saleorder_document">
    <!-- Re-browse of the record with the partner lang -->
    <t t-set="doc" t-value="doc.with_context({'lang':doc.partner_id.lang})" />
    <t t-call="web.external_layout">
        <div class="page">
            <div class="oe_structure"/>
            <div class="row">
                <div class="col-xs-6">
                    <strong t-if="doc.partner_shipping_id == doc.partner_invoice_id">Invoice and shipping address:</strong>
                    <strong t-if="doc.partner_shipping_id != doc.partner_invoice_id">Invoice address:</strong>
                    <div t-field="doc.partner_invoice_id" t-options="{&quot;no_marker&quot;: True}"/>
                <...>
            <div class="oe_structure"/>
        </div>
    </t>
</template>

<t t-call="web.external_layout" t-lang="en_US">

Barcode

<img t-att-src="'/report/barcode/QR/%s' % 'My text in qr code'"/>

<img t-att-src="'/report/barcode/?
    type=%s&value=%s&width=%s&height=%s'%('QR', 'text', 200, 200)"/>

Paper Format

<record id="paperformat_frenchcheck" model="report.paperformat">
    <field name="name">French Bank Check</field>
    <field name="default" eval="True"/>
    <field name="format">custom</field>
    <field name="page_height">80</field>
    <field name="page_width">175</field>
    <field name="orientation">Portrait</field>
    <field name="margin_top">3</field>
    <field name="margin_bottom">3</field>
    <field name="margin_left">3</field>
    <field name="margin_right">3</field>
    <field name="header_line" eval="False"/>
    <field name="header_spacing">3</field>
    <field name="dpi">80</field>
</record>

Add paperformat to report

<record id="sale.report_saleorder_document" model="ir.actions.report.xml">
    <field name="paperformat_id" ref="my_module.paperformat_frenchcheck"/>
</record>

Python object

from odoo import api, models

class ParticularReport(models.AbstractModel):
    _name = 'report.module.report_name'
    @api.model
    def render_html(self, docids, data=None):
        report_obj = self.env['report']
        report = report_obj._get_report_from_name('module.report_name')
        docargs = {
            'doc_ids': docids,
            'doc_model': report.model,
            'docs': self,
        }
        return report_obj.render('module.report_name', docargs)

Change font type link

Available fonts HERE

Add the font in stylesheet

<xpath expr="." position="inside">
    <link href="https://fonts.googleapis.com/css?family=Roboto|Roboto+Condensed" rel="stylesheet"/>
</xpath>

Set in the report page (no header and no footer)

<xpath expr="//div[@class='page']" position="attributes">
    <attribute name="style">font-family: 'Roboto', sans-serif;</attribute>
</xpath>

Set in footer

<xpath expr="//div[@class='footer']" position="replace">
    <div class="footer" style="font-family: 'Roboto Condensed', sans-serif;">
</xpath>

Change datetime format

link

<span t-field="o.date_order" t-field-options='{"format": "d MMMM y"}'/>

<span t-field="o.date_order" t-field-options="{&quot;format&quot;: &quot;yyyy-MM-dd&quot;}" />

<span t-field="o.commencement_date" t-field-options="{&quot;format&quot;: &quot;dd/MM/yy&quot;}"></span>

<span t-esc="o.order_date" t-options='{"widget": "date"}'/>

<span t-esc="time.strftime('%A, %d %B %Y',time.strptime(o.date_order,'%Y-%m-%d %H:%M:%S'))"/>

Report by server action

link

This case I call report generation of PDF in product.product form an action server located in mrp.production

Default report

        <report id="report_product_product_pdf"
                string="Print Attached PDF Drawings"
                model="product.product"
                name="plm.report_product_product_pdf"
                report_type="pdf"
                file=""
                header="False"
                />

Action server by production

        <record model="ir.actions.server" id="print_attached_pdf_mo">
            <field name="name">Print Attached PDF Drawings</field>
            <field name="model_id" ref="mrp.model_mrp_production"/>
            <field name="code">
if records:
    action = records.printAttachedPdf()
            </field>
        </record>

        <record model="ir.values" id="value_print_attached_pdf_mo">
            <field name="model_id" ref="mrp.model_mrp_production" />
            <field name="name">Print Attached PDF Drawings</field>
            <field name="key2">client_action_multi</field>
            <field name="value" eval="'ir.actions.server,' + str(ref('print_attached_pdf_mo'))" />
            <field name="key">action</field>
            <field name="model">mrp.production</field>
        </record>

Python side generation

class MrpProduction(models.Model):
    _inherit = "mrp.production"

    @api.multi
    def printAttachedPdf(self):
        products = self.env['product.product']
        for mo_brws in self:
            products += mo_brws.product_id
        data = {}
        data['ids'] = products.ids
        data['model'] = 'product.product'
        return self.env['report'].get_action(products.ids, 'plm.report_product_product_pdf', data)