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In a custom module , I add new field ir_attchment_ids . When connecting wih other user (not admin) , I got this error .

Uh-oh! Looks like you have stumbled upon some top-secret records.

Sorry, user (id=8) doesn't have 'read' access to:
- Attachment (ir.attachment)

If you really, really need access, perhaps you can win over your friendly administrator with a batch of freshly baked cookies.

Here is my code

Python :

class AddAttachment(models.Model):
    _name = "add.attachment"
    
     attachment_ids = fields.Many2many("ir.attachment", string="My Attachment") 

XML :

    
        add.ttachment.form
        add.ttachment
        
            
                
                    
                         
                    
                
            
        
    
    
        add.ttachment.tree
        add.ttachment
        
            
              
            
        
    

    
        Add Attachment
        add.attachment
        tree,form
    

SECURITY

id,name,model_id:id,group_id:id,perm_read,perm_write,perm_create,perm_unlink
access_add_attachment,add.attachment,model_add_attachment,,1,1,1,1

Any idea please ? Thanks.