library/library_app/models/library_book.py

from odoo import fields, models

class Book(models.Model):
    _name = 'library.book'
    _description = 'Book'
    name = fields.Char('Title', required=True)
    isbn = fields.Char('ISBN')
    active = fields.Boolean('Active?', default=True)
    date_published = fields.Date()
    image = fields.Binary('Cover')
    publisher_id = fields.Many2one('res.partner', string='Publisher')
    author_ids = fields.Many2many('res.partner', string='Authors')
    <form string="Book">
    <header>
        <button name="button_check_isbn" type="object"
            string="Check ISBN" />
    </header>
    <sheet>
        <group name="group_top">
            <group name="group_left">
                <field name="name" />
                <field name="author_ids" widget="many2many_tags" />
                <field name="publisher_id" />
                <field name="date_published" />
            </group>
            <group name="group_right">
                <field name="isbn" />
                <field name="active" />
                <field name="image" widget="image" />
            </group>
        </group>
    </sheet>
</form>
def _check_isbn(self):
        self.ensure_one() 
        isbn = self.isbn.replace('-', '') # 为保持兼容性 Alan 自行添加
        digits = [int(x) for x in isbn if x.isdigit()]
        if len(digits) == 13:
            ponderations = [1, 3] * 6
            terms = [a * b for a,b in zip(digits[:13], ponderations)]
            remain = sum(terms) % 10
            check = 10 - remain if remain !=0 else 0
            return digits[-1] == check