Hi

I have two models:

class Pharmacy(models.Model):
    _inherit = 'res.partner'
     medicine_ids = fields.Many2many('product.template', string="Existing Medicines") 

class Medicine(models.Model):
    _inherit = 'product.template'
    pharmacy_ids = fields.Many2many('res.partner', string="Pharmacieis")

def add_pharmacies(self):

some logic

I need in form view of Medicine by pushing a button the function add_pharmacies be called and 1 pharmacy be added to the list of the pharmacies that have that product and the product to be added to specific pharmacy.

What Should I write in my function?