It turns out to be not quite so straightforward to do this in Odoo Studio (Odoo 13):

1. The widget is product_configurator
2. No checkboxes for “Disable creation” and “Disable opening”

The workaround is to change the widget

Now those two checkboxes are visible, so:

1. Click on both checkboxes
2. Exit Studio
3. Now there’s no option to add a product:

This is the Extension View:

This is the XML

<data>
    <xpath expr="//field[@name='product_template_id']" position="attributes">
      <attribute name="options">{"no_open":true,"no_create":true}</attribute>
      <attribute name="widget">many2one</attribute>
    </xpath> 
</data>

If you don’t have Odoo Studio you could achieve the same effect by creating an Extension View manually.

I think you can remove the line that changes the widget

https://odootricks.tips/prevent-users-create-products-on-the-fly/

Is there any way this solution (<field name="product_id" options="{'no_create': True}"/>) can be implemented through the "Studio" app?  I've tried various ways of entering this option in both the "domain" and "context" fields, to no avail.

If not possible, can someone please walk me through where to enter the <field name="product_id" options="{'no_create': True}"/>? ...preferably starting from the odoo dashboard.

HI Michael, you can use the below syntax at sale.order.line view for product_id field to prevent users to create the product from Sale Order/Quote form view.

<field name="product_id" options="{'no_quick_create': True,'no_create_edit':True}"/>

Thanks ray Carnes,

it helped me so much

i did it for sale.order.form, purchase.order.form and stock.picking.form

the difficulty is to find the right line to add this option but after several trials, i got it and it was a different line for each form

You can set some validation on create function of the product

example:

def create(self, vals):

     if not description: # get description value from vals

         #some warning code