How to set many2one domain based on many2many field in odoo

Question

Hello All,
i want to set domain on Many2one field based on Many2one's sub Many2many field.
i have one Many2one field(A) and this field has Many2many field, and i have another Many2one field(B), i want to filter field B record based on field A's sub many2many field's record.
field B is of model(a.a) and A's many2many sub field model is a.a so how to do this.

Rakesh Vadeghar · Answer

try this
@ api.onchange ( 'your_m2m_field' )
def _get_product_domain( self ):
self .ensure_one()
self .product_id = False
products = self .your_m2m_field.mapped( 'product_id' ).mapped( 'id' ) #you rewrite this line as per your requirement
if products:
return  { 'domain' :{ 'product_id' :[( 'id' , 'in' , products)]}}
else :
return  { 'domain' :{ 'product_id' :[( 'id' , 'in' , [])]}}

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