I have two Module

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Module 1

name = fields.Char()

isactive=fields.Boolean(default=True)

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Module 2

name=fields.Char()

fromModule1=fields.Many2many('module1.module1')

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Module 2 XML      = <group><field name="fromModule1" domain="[('isactive', '=',True)]"/></group>
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Question

from Module2 how to update the ( isactive ) in Module1 to make it 'FALSE'  using button?

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Module2

<header><button name="button_False" string="Update" type="object"/></header>

.py

@api.multi

    def button_False(self):

        self.Count = len(self.fromModule1)

        for x in self.Count:

            self.fromModule1.isactive[x] = False 

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# I try this rookie code, well you know it,  it is not working.....

Odoo12 CE

Custom Module