[Python] Odoo 17: How to control which fields are available in the Export wizard using a...

What I want to know:

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  How do I properly prevent fields marked as restricted from showing in the Export wizard?
  
  
• 
  Do I need to override the export controller or monkey-patch export_data?
  
  
• 
  What is the best practice for this kind of field-level export restriction?
  

Context:

• 
  Odoo version: 17;
  
  
• 
  Using a custom module with Python controllers;
  
  
• 
  I’m comfortable with inheriting controllers and adding custom routes.
  

What I tried:

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  I added a custom boolean field named restricted to the ir.model.fields model using a custom addon;
  
  
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  I can see the restricted field in Settings → Technical → Fields, and I can check/uncheck it for any field;
  
  
• 
  I tried using attrs and access rights rules, but they only work in form or tree views, not in the Export wizard;
  
  
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  I attempted to restrict the field directly by modifying its properties in the database or UI, but that gave me this error:
  

Invalid Operation:
Properties of base fields cannot be altered in this manner! Please modify them through Python code, preferably through a custom addon.
​

• I looked into export_data but I’m not sure how to properly override it or the Export controller logic.

What I expected:
I expected that when restricted is checked on a field, that field should not appear in the list of fields in the Export wizard (the box where you select which fields to export).

I want normal users to never see restricted fields as exportable, while Admins can still configure which fields are restricted. Here is a screenshot of the ir.model.fields model with the restricted field visible: screenshot.

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