this is code for the button.

class ticket_requisition(models.Model):

_name='ticket.requisition'

_inherit = ['mail.thread', 'mail.activity.mixin', 'portal.mixin']

_order = 'name desc, id desc'

_description = "Requisition"

@api.multi

def action_quotation_send(self):

'''

This function opens a window to compose an email, with the edi sale template message loaded by default

'''

self.ensure_one()

ir_model_data = self.env['ir.model.data']

try:

template_id = ir_model_data.get_object_reference('sevate_added_fields', 'requisition_email_template')[1]

except ValueError:

template_id = False

try:

compose_form_id = ir_model_data.get_object_reference('mail', 'email_compose_message_wizard_form')[1]

except ValueError:

compose_form_id = False

ctx = {

'default_model': 'ticket.requisition',

'default_res_id': self.ids[0],

'default_use_template': bool(template_id),

'default_template_id': template_id,

'default_composition_mode': 'comment',

'mark_so_as_sent': True,

'proforma': self.env.context.get('proforma', False),

'force_email': True

}

return {

'type': 'ir.actions.act_window',

'view_type': 'form',

'view_mode': 'form',

'res_model': 'mail.compose.message',

'views': [(compose_form_id, 'form')],

'view_id': compose_form_id,

'target': 'new',

'context': ctx,

}

this is my email template, body is not showing inside my template and showing Failed to render template

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

<odoo>

<data>

<record id="requisition_email_template" model="mail.template">

<field name="name">Requisition email template</field>

<field name="model_id" ref="sevate_added_fields.model_ticket_requisition"/>

<field name="email_from"><![CDATA["${object.company_id.name|safe}" <${(object.company_id.email or user.email)|safe}>]]></field>

<field name="email_to">${object.email|safe}</field>

<field name="subject">Requisition template</field>

<field name="body_html"><![CDATA[

<div style="padding:0px;width:600px;margin:auto;background: #FFFFFF repeat top /100%;color:#777777">

<table cellspacing="0" cellpadding="0" style="width:600px;border-collapse:collapse;background:inherit;color:inherit">

<tbody><tr>

<td valign="center" width="200" style="padding:10px 10px 10px 5px;font-size: 12px">

<img src="/logo.png" style="padding: 0px; margin: 0px; height: auto; width: 80px;" alt="${user.company_id.name}">

</td>

</tr></tbody>

</table>

</div>

<div style="padding:0px;width:600px;margin:auto;background: #FFFFFF repeat top /100%;color:#777777">

<p>Dear,</p>

<p>The Requisition name is ${object.name}</p>

<p>The Requisition Due Date is ${object.due_date}</p>

<p>If you do not expect this, you can safely ignore this email.</p>

<p>Best regards,</p>

</div>

<div style="padding:0px;width:600px;margin:auto; margin-top: 10px; background: #fff repeat top /100%;color:#777777">

${user.signature | safe}

<p style="font-size: 11px; margin-top: 10px;">

<strong>Sent by ${user.company_id.name} style="text-decoration:none; color: #875A7B;"></a></strong>

</p>

% if is_online and not ctx.get('proforma'):

<br/><br/>

<center>

<a href="${access_url}" style="background-color: #1abc9c; padding: 20px; text-decoration: none; color: #fff; border-radius: 5px; font-size: 16px;" class="o_default_snippet_text">${access_name}</a>

<br/><br/><br/>

<span style="color:#888888">(or view attached PDF)</span>

</center>

<br/>

% endif

</div>]]></field>

<field name="user_id.signature" eval="False"/>

</record>

</data>

</odoo>

thanks