Filtering relationship field Selection Based on another field in CRM Module

Question

I have a field called 'Customer' in the CRM module that links to records in the Contacts module. Additionally, I have another field called 'Site' that links to records in the Site module.
In the Contacts module there is a manyToMany field that connects to the site module.
Currently, all fields are working fine. However, I want to enhance the 'Site'  field in the CRM so that it only displays sites related to the selected 'Customer'.
I'm using Odoo Studio (web version) for this customization. Coul

Paresh Wagh · Answer

Hi Michael: You will not be able to do it within Studio since the domain builder in Studio does not allow domains that reference a field. You will need to customize the CRM view and add domain="[(' partner_ids.id [1] ', '=', partner_id)]" to the "sites" field in the CRM form.

[1] http://partner_ids.id

CandidRoot Solutions Private Limited · Answer

Hello Michael Spitzer,
*Step 1: First let's create new field(many2many) called "site" in contact model.*
Image [3]
*Step 2:  Let's Add new  field many2many related to site model's site field. we can make this invisible, use of this field is only for apply domain in crm model.
*
Image [4]

*Step 3: Add New site field many2many in crm model with domain of field created in step2 as below*
Image [5]
Final result : site field in crm will have option based on customer's related site.
Image [6]

I have

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