class EmailAccount(ModelSQL, ModelView):
    "Email Account"
    _name = 'electronic_invoice.emailaccount'

    description = fields.Char('Description', size=40, required=True)

    email_address = fields.Char('Email Address', size=40, required=True)

    pop3_server = fields.Char('POP3 Server', size=40, required=True)

    username = fields.Char('Username', size=40, required=True)

    password = fields.Char('Password', size=20, required=True)

EmailAccount()

class FetchPattern(ModelSQL, ModelView):
    _name = 'electronic_invoice.fetchpattern'

    description = fields.Char('Description', size=40)

    email_account = fields.Many2One('electronic_invoice.emailaccount',
            'Description', required=True)

    subject_regexp = fields.Char('Subject RegExp', size=100, required=True)

FetchPattern()