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Ernest Cichoń

I'm trying to create a model field for months that:

  • Displays month names in a selection dropdown
  • Stores the month as an integer value
  • Ensures the integer is preserved during export/import

Here's my current approach:

pythonCopyclass MyModel(models.Model):
    _name = 'my.model'

    month = fields.Selection([
        ('1', 'January'),
        ('2', 'February'),
        ('3', 'March'),
        ('4', 'April'),
        ('5', 'May'),
        ('6', 'June'),
        ('7', 'July'),
        ('8', 'August'),
        ('9', 'September'),
        ('10', 'October'),
        ('11', 'November'),
        ('12', 'December')
    ], string='Month')

    month_int = fields.Integer(
        string='Month Number',
        compute='_compute_month_int',
        store=True
    )

    @api.depends('month')
    def _compute_month_int(self):
        for record in self:
            record.month_int = int(record.month) if record.month else False

Questions:

  1. Is this the correct way to create a month selection field that stores as an integer?
  2. Are there any potential issues with export/import using this method?
  3. Would you recommend any improvements to this approach?

I want to ensure:

  • User-friendly month selection
  • Accurate integer storage
  • Compatibility with exports/imports

Any guidance or best practices would be greatly appreciated!

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Ernest Cichoń
Penulis Jawaban Terbai

According to the changes introduced in  IMP] fields: remove support for non-string selections #29039, the ability to use integers as value in Selection fields has been removed. This means that all selection values must now be strings. 

I absolutely don’t understand why this change was made. Using integers as selection values feels more intuitive, especially when working with numeric-like data such as months or other measurable entities. This decision seems to complicate certain use cases unnecessarily.

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Ray Carnes (ray)
Jawaban Terbai

Why not just define your field like this:

month = fields.Selection([
        (1, 'January'),
        (2, 'February'),
        (3, 'March'),
        (4, 'April'),
        (5, 'May'),
        (6, 'June'),
        (7, 'July'),
        (8, 'August'),
        (9, 'September'),
        (10, 'October'),
        (11, 'November'),
        (12, 'December')
    ], string='Month')

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