Odoo 8 - Launch a ir.actions.act_window from a python method? -

is possible launch ir.actions.act_window python method of model?. instance, have implemented session model represents course session (i have course model). also, have openacademy.xml have defined form view open session form view.

<record model="ir.ui.view" id="session_form_view">       <field name="name">session.form</field>       <field name="model">openacademy.session</field>       <field name="arch" type="xml">         <form>           <header>             <button name="draft" type="workflow"                     string="reset draft"                     states="confirmed,done"/>             <button name="confirm" type="workflow"                     string="confirm" states="draft"                     class="oe_highlight"/>             <button name="done" type="workflow"                     string="mark done" states="confirmed"                     class="oe_highlight"/>             <button type="object"                     name="my_method"                     string="new course"/>             <field name="state" widget="statusbar"/>           </header>           <sheet>             <group string="general">               <field name="name" string="session name"/>               <field name="course_id" string="course"/>               <field name="instructor_id" string="instructor"/>             </group>             <group string="management">               <field name="start_date" string="start date"/>               <field name="active" string="active"/>               <field name="duration" string="duration (in days)"/>               <field name="seats"/>               <field name="percent_taken_seats" widget="progressbar"/>             </group>             <label for="attendees"/>             <field name="attendees"/>           </sheet>         </form>       </field>     </record> 

the relevant part of above code following:

<button type="object" name="my_method" string="new course"/>

when click on button method 'my_method' session model (class session) called.

class session(models.model): ...      @api.one     def my_method(self):         return {             'type': 'ir.actions.act_window',             'res_model': 'openacademy.course',             'view_type': 'form',             'view_mode': 'form',             'target': 'new',         } 

this method return dictionary containing differents keys , values of window action, doesn't work in odoo 8. when click on button "new course", my_method executed course form view not opened create new course record.

i don't know if possible in odoo version 8, or if my_method must return more.

the problem decorator @api.one. 1 decorator wrap result of method dict this:

{res_id: result} 

which means in case, you're returning

{res_id: act_window} 

or in array if call directly: [act_window]

unfortunately, odoo expect have result (the actual thing returned @ point).

in case, should instead use this:

@api.multi def my_method(self):     self.ensure_one()     return {         'type': 'ir.actions.act_window',         'res_model': 'openacademy.course',         'view_type': 'form',         'view_mode': 'form',         'target': 'new',     } 

self.ensure_one isn't particularly necessary in case what's important use @api.multi. doesn't wrap result in , return return unlike api.one.

personally, prefer use api.multi because api.multi keeps things clean in case. when started use @api.one ended in many place things like:

val = self._compute_something()[0] 

where have first element because odoo wraps list... while @api.multi more flexible , if want force called 1 element can use ensure_one.