how to override the force_assign method in stock module, in model stock.picking

Question

can you please tell me how to override the force_assign method in stock module, in model stock.picking. Especially I want to know how to use the @api.returns  decorator in the case of overriding the force_assign method. force_assign is a small method in stock module of object stock.picking. I am using odoo v9. In case, you need I have copied the code of force_assign here.
The overriding method should just simply raise a UserError:
def force_assign(self,cr,uid,ids,context=context)
"""changes stat

Jignesh Mehta · Accepted Answer

Hello Raiye hailu,
You need to use *super* keyword for override any existing method:
EX:-
def force_assign(self,cr,uid,ids,context=context)
// Put your code
return super(model_name, self).force_assign(cr, uid, ids, context=context)
Hope it will works for you.
Thanks,

Jainesh Shah(Aktiv Software) · Answer

You can easily Override "force_assign" method as follows (using new api).
@api.multi def force_assign(self):
"Put Your Warning Here"
-> @api.returns is used when your "return value" is an Object.
i.e @api.returns(self) is written when method returns its own object(self).

raiye hailu · Answer

Thank you guys . I have found that both solutions work. I had forgotten to put the raise keyword before
calling exceptions.UserError.
Therefore the correct code is:
#new api
@api.multi
def force_assign(self):
raise exceptions.UserError('Error')
#old api
def force_assign(self,cr,uid,ids,context=None)
raise exceptions.UserError ('Error')
return super(model_name, self).force_assign(cr, uid, ids, context=context)#this line is not necessarily needed

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