Hello there :)

I am trying to add an action to a simple app I've made. 

Therefore I have added a method to my class:

class RollsManagement(models.Model):
    _name = 'rollsmanagement.roll'
    _description = 'Managing rolls'
    _order = 'sequence'
    _rec_name = 'name'
    ...

simply like this:

...
def action_create_inventory_from_selection(self):
    ​....

In my XML I've added the action like this:

    <record id="action_roll_inventory_import" model="ir.actions.server">
        <field name="name">Create Inventory from Rolls</field>
        <field name="model_id" ref="model_rollsmanagement_roll"/>
        <field name="binding_model_id" ref="model_rollsmanagement_roll"/>
        <field name="binding_view_types">list</field>
        <field name="state">code</field>
        <field name="code">
            action = model.action_create_inventory_from_selection()
        </field>
    </record>

My action appears when I've selected one or more data entries (rolls) in the drop down button "Actions" and when I click it, it ends in this error:

File "ir.actions.server(660,)", line 1, in <module>
AttributeError: 'rollsmanagement.roll' object has no attribute 'action_create_inventory_from_selection'

I have the strong feeling, I am missing something essential, maybe simple even. The model is there and working as always but somehow it seems that I cannot call the action the right way. Two LLMs are already at the end of their knowledge, it seems. Does anyone have a hint?

PS: If you're interested, my app lists some special rolls and simple information about them. I try to make an action that sums up their square meters and put that into the inventory adjustment.