odoo10 how to build 2 onchange function in 1 field

Question

I have problem with an onchange function in Odoo 10.

This is some example code:

class test_1(models.Model)
    Input = fields.Integer()

From another class, I have an onchange function. This class is a default system, which can't change or add anything in this code.

class test_onchange(models.Model)
    @api.onchange('Input')
    def _onchange_test_1(self):
        ## some process ##

Here is the function I am writing. It is an onchange with Input too.

class test_onchanger(models.Model)
    @api.onchange('Input')
    def _onchange_test_addon(self):
        ## some process. and different  _onchange_test_1

So the question is:

How can I build an onchange function on the Input field from another class/module if the Input field already has an onchange function from the default system/code.

Anyone have an idea? Can I inherit on _onchange_test_1 or maybe something else?

Answer 1

To confirm, you want to extend (add customizations onto) an existing onchange method?

As mentioned in the other answer, the simplest way is to just inherit the existing onchange method.

---

Let's assume this is the core code, which you can't modify:

class CoreClass(models.Model):
    _name = 'core.class'

    Input = fields.Integer()

    @api.onchange('Input')
    def _onchange_input(self):
        ## some process ##

In your module, you can extend the class and make your additional changes.

Note: The core class method still runs when you call it with super .

class CoreClassCustom(models.Model):
    _inherit = 'core.class'

    @api.onchange('Input')
    def _onchange_input(self):
        res = super(CoreClassCustom, self)._onchange_input()
        ## your custom process ##
        return res

Here is the Odoo 10 ORM Documentation , which briefly goes over onchange methods.

Answer 2

您可以继承现有的onchange方法或为同一字段编写另一个onchange方法，两者都可以工作。