Prevent contact duplication

Question

Hello, I'm on odoo entreprises 17.
I want to prevent users from creating the same contact twice. By preventing users from saving the same phone number twice on two contacts

Niyas Raphy (Walnut Software Solutions) · Accepted Answer

Hi,
You can achieve it from the code or from the user interface. If you are doing from code, just add a constrain for the field and check against existing contacts and raise validation error.
See an use case with automated action:   Prevent Product Duplication without code using automated actions [1]
None [2]

Thanks

[1] https://www.youtube.com/watch?v=8V14lcJlkfA
[2] https://www.youtube.com/@odoodiscussions

ODOO_Aspirant · Answer

One way of doing is  by  STUDIO with below steps

Open Contact Form
Open Studio
select Phone Field - In Studio and  Mark as  UNIQUE
But  for existing records - when u open , you need to enter unique value

AZEEZ GANIYU ADEMOLA · Answer

Thanks, I did watch the video, in fact I had also tried to do it from an automation but I think my error is in the code.
existingcontact =  env['res.partner'].search([('phone','=',record.phone)])
if len(existingcontact) > 1:
raise Warning('Ce contact est déjà enregistré !')

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