Add PartialDateForm #6

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1. lorinkoz commented on Aug 13, 2020

   

   lorinkoz

   on Aug 13, 2020

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   How do you envision it?
2. RafifEL commented on Aug 13, 2020

   

   RafifEL

   on Aug 13, 2020

   Last edited by RafifEL

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   How do you envision it?

   I'm thinking that we have to create Custom Form field PartialDateField that receive ISO Format date that create cleaned_data in form of PartialDateField Object
3. SamuelJennings commented on May 13, 2024

   

   SamuelJennings

   on May 13, 2024

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   I wrote a custom form widget with a nicer UI for PartialDate fields based on Django's SelectDateWidget.

   The code looks like this:

   class PartialDateWidget(forms.SelectDateWidget):
     def get_context(self, name, value, attrs):
         # reorder the subwidgets to year, month, day
         context = super().get_context(name, value, attrs)
         m, d, y = context["widget"]["subwidgets"]
         context["widget"]["subwidgets"] = [y, m, d]
         return context
   
     def format_value(self, value):
         # convert PartialDate to dict for SelectDateWidget
         if isinstance(value, PartialDate):
             return {
                 "year": value.date.year,
                 "month": value.date.month if value.precision >= PartialDate.MONTH else None,
                 "day": value.date.day if value.precision == PartialDate.DAY else None,
             }
         return {"year": None, "month": None, "day": None}
   
     def value_from_datadict(self, data, files, name):
         # build a PartialDate from the separate fields
         y = data.get(self.year_field % name)
         m = data.get(self.month_field % name)
         d = data.get(self.day_field % name)
         if y == m == d == "":
             return None
   
         # build the date string
         value = y
         if m:
             value += f"-{m}"
         if m and d:
             value += f"-{d}"
   
         return value
   

   and the end result in the admin site is this:

   

   I use the widget in my admin classes by specifying it in formfield_overrides, however, it would be fairly trivial to create a custom form field that can be used in any form.

   If you like, I'd be happy to write some tests and submit a pull request.