After few days of brainstorm, trials and errors I finally managed it to work. You need to pass as arguments not

[{'instance_id': 1}]

but

[[], 1]

I have no idea why it works like this. I have a code like yours and it works... but for my module I had to change like this

Hi everyone,

I have the same issue, wanna call my @api.model and my browser return some errors (web/dataset/call_kw):

"Failed to load resource: the server responded with a status of 500 (INTERNAL SERVER ERROR)"

Something bad !!!

// My Python3 Class

Class ProductTemplate(model.Model):

  _inherit = '''product.template'''

  @api.model

  def say_something(self):

   view_id = self.env.ref('mymodule.action_get_something_view').read()[0]
   return {
     'name': _(view_id.name) if view_id else '',
     'type': view_id.type if view_id else '',
     'views': [(view_id.id,'tree')],
     'view_type': view_id.view_type if view_id else '',
     'view_mode': view_id.view_mode if view_id else '',
     'res_model': view_id.res_model if view_id else '',
     'res_id': self.id,
     #    'context':{},
     'target': 'new',
 }    

JS FILE 

_onClick: function(){

    return rpc.query({

      model: 'product.template',

     method: 'say_something'                                                                                                                                                                                             }).then(function(result){ console.log('Good');}).fail(function(){ console.log('Something bad !!!')});                          

} ,

Same with this._rpc.

Odoo V12.

TRIGGER_UP ???

Thanks

Hilar,

I am not sure how your solution is different than what I have in my second example? Please explain.

Dmitriy,

Hilar was correct, I needed the model decoration on my python method for this to work. So add:

@api.model
def method_name( self, param1, param2 )

 Sorry, I forgot to update this post that it worked.