Hi Yu,

In Odoo 13+, the context variable is no longer available directly in XML expressions like it was in older versions (e.g., Odoo 11). That’s why you're getting the NameError: name 'context' is not defined.

How to Fix It

Instead of using context.get(...), you should use the new format, where previous context values can be accessed using ctx.get(...) inside the context attribute of an action. Here's how you can rewrite your XML:

<record id="action_remove_solution_act" model="ir.actions.act_window">
    <field name="name">Remove Solution</field>
    <field name="res_model">helpdesk.solution.wizard</field>
    <field name="view_mode">form</field>
    <field name="target">new</field>
    <field name="binding_model_id" ref="helpdesk.model_helpdesk_solution"/>
    <field name="context">
        {
            'default_solution_ids': active_ids,
            'remove_solution': True,
            'default_ticket_id': ctx.get('default_ticket_id')
        }
    </field>
</record>

Explanation

• Odoo 13+ replaced context.get(...) in XML with ctx.get(...).
• ctx refers to the evaluated context passed from the action or environment.
• active_id, active_ids, and ctx are all accessible in that scope.