Helllo, Enish

I hope you're doing well.

In Odoo, a `Many2one` field creates a relationship between two models. When you set `comodel_name` to `ir.model.fields`, you’re linking to a model that represents fields within other models in Odoo.

The `ir.model.fields` model stores information about all fields across Odoo, including their names, types, and associated models. This is particularly useful for configurations where you need to reference specific fields dynamically across different models.

You can refer the attached images.

The "Customer" field is a `Many2one` field with `comodel_name` set to `res.partner`, which means it displays all customer records from the "res.partner" model in the dropdown.






I Hope this information proves helpful to you. 

Thanks & Regards, 
Email: odoo@aktivsoftware.com 
Skype: kalpeshmaheshwari