I have 2 models, 'cus.enq' and 'cus.act'. The models for customer enquiries and customer activities. Some fields in both models are common. 

#cus.enq

class CustomerEnquiries(models.Model):

    _name = 'cus.enq'

    task_ids = fields.One2many('cus.act', 'enquiries_id')

    partner_id = fields.Many2one('res.partner', string="Customer Name")

    source_id = fields.Many2one('utm.source', string="Source")

    email = fields.Char()

    partner_phone = fields.Char(string="Phone")

    partner_mobile = fields.Char(string="Mobile")

Here i have a one2many field that is related to 'cus.act' model.

#cus.act

class CustomerActivities(models.Model):

    _name = 'cus.act'

    action_id = fields.Many2one('lmc.action', required=True, string="Action")

    create_uid = fields.Many2one('res.users', string="Created By", readonly=True)

    source_id = fields.Many2one('utm.source', string="Source")

    partner_id = fields.Many2one('res.partner', string="Client")

    partner_phone = fields.Char(string="Phone")

    user_id = fields.Many2one('res.users', string="Responsible")

    partner_mobile = fields.Char(string="Mobile")

    email = fields.Char()

    enquiries_id = fields.Many2one('lmc.enq')

#xml

<notebook>

    <page string="Related Tasks">
<group>
<field name="task_ids" nolabel="1">

      <tree editable="bottom"

    <field name="create_uid"/>

      <field name="action_id"/>

      <field name="user_id"/>
</tree>

      </field>

      </group>

        </page>

 </notebook>

#notes

in xml the page is one2many of cus.enq module.My question is i want to create the record of models 'cus.act' from the model 'cus.enq'. How it is possible. I want to create the create when the save button is pressed.I know the create method is used here.Please help me how it is used here.Thanks in advance.