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Ramanathan Lakshmanan 
class BookModel(models.Model):
    _name = 'books.model'
    _rec_name = 'book_Name'

    """attributes to store the details of book"""
    book_Id = fields.Char(string='Book ID')
    book_Name = fields.Char(string="Book Name")
    authors = fields.Char(string="Authors")
    genres = fields.Char(string="Genres")
    book_Image = fields.Binary("Image")
    book_Availability = fields.Selection([('available', 'Available'),
        ('not available', 'Not Available')],string="Status")
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Cybrosys Techno Solutions Pvt.Ltd
Best Answer

Hi,

For this, you have to create two models. One is for Book records and the other one for its copies.

class BooksBooks(models.Model):
    _name = 'books.books'
    _rec_name = 'book_Name'

    book_id = fields.Char(string='Book ID')
    book_Name = fields.Char(string="Book Name")


Then for the copies, you have to create another model


class BookCopies(models.Model):
    _name = 'books.copies'

    book_id = fields.Many2one('books.books', string='Book ID')
    copy_no = fields.Char(string="Copy ID")

and make the field copy_no as unique by giving constrains.


Thanks

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