<?xml version="1.0" encoding="UTF-8"?>
<openerp>
    <data>
	<!-- report definition-->
      <report
            id="report_session"
            model="openacademy.session"
            string="Session Report"
            name="openacademy.report_session_view"
            file="openacademy.report_session"
            report_type="qweb-pdf" />

	<!--report template-->
	<template id="report_session_view">
	    <t t-call="report.html_container">
            <t t-foreach="docs" t-as="doc">
                <!--<t t-call="report.external_layout">-->
                    <div class="page">
                        <h2 t-field="doc.name"/>
                        <p>From <span t-field="doc.start_date"/> to <span t-field="doc.end_date"/></p>
            
			<h3>Attendees:</h3>
                        <ul>
                            <t t-foreach="doc.attendee_ids" t-as="attendee">
                                <li><span t-field="attendee.name"/></li>
                            </t>
                        </ul>
                    </div>
                <!--</t>-->
            </t>
            </t>
	</template>
    </data>
</openerp>

<?xml version="1.0" encoding="UTF-8"?>
<openerp>
    <data>
	<!-- report definition-->
      <report
            id="report_session"
            model="openacademy.session"
            string="Session Report"
            name="openacademy.report_session_view"
            file="openacademy.report_session"
            report_type="qweb-pdf" />

	<!--report template-->
	<template id="report_session_view">
	    <t t-call="report.html_container">
            <t t-foreach="docs" t-as="doc">
                <!--<t t-call="report.external_layout">-->
                    <div class="page">
                        <h2 t-field="doc.name"/>
                        <h2 t-field="doc.course_id.name"/>
                        <p>From <span t-field="doc.start_date"/> to <span t-field="doc.end_date"/></p>
            
			<h3>Attendees:</h3>
                        <ul>
                            <t t-foreach="doc.attendee_ids" t-as="attendee">
                                <li><span t-field="attendee.name"/></li>
                                <li><span t-field="attendee.email"/></li>
                            </t>
                        </ul>
                    </div>
                <!--</t>-->
            </t>
            </t>
	</template>
    </data>
</openerp>

Add course_id.name and attendee.email into report
[REF] openacademy: Add course_id.name and attendee.email into report
