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73 lines
2.5 KiB
Python
73 lines
2.5 KiB
Python
from decimal import Decimal, InvalidOperation
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from django import forms
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from django.utils.formats import get_format, number_format
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def convert_to_decimal(value: str):
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# Remove any whitespace
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value = value.strip()
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# Get the thousand and decimal separators from Django's localization settings
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thousands_sep = get_format("THOUSAND_SEPARATOR")
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decimal_sep = get_format("DECIMAL_SEPARATOR")
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# Remove thousands separators and replace decimal separator with '.'
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value = value.replace(thousands_sep, "")
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value = value.replace(decimal_sep, ".")
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# Convert to Decimal
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if value:
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return Decimal(value)
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return None
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class ArbitraryDecimalDisplayNumberInput(forms.TextInput):
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"""A widget for displaying and inputing decimal numbers with the least amount of trailing zeros possible. You
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must set this on your Form's __init__ method."""
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def __init__(self, *args, **kwargs):
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self.decimal_places = kwargs.pop("decimal_places", None)
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self.type = "text"
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super().__init__(*args, **kwargs)
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self.attrs.update(
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{
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"x-data": "",
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"x-mask:dynamic": f"$money($input, '{get_format('DECIMAL_SEPARATOR')}', "
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f"'{get_format('THOUSAND_SEPARATOR')}', '30')",
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}
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)
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def format_value(self, value):
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if value is not None and isinstance(value, (Decimal, float, str)):
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try:
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# Convert to Decimal if it's a float or string
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if isinstance(value, float):
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value = Decimal(value)
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elif isinstance(value, str):
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value = Decimal(convert_to_decimal(value))
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# Remove trailing zeros
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value = value.normalize()
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# Format the number using Django's localization
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formatted_value = number_format(
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value,
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force_grouping=False,
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decimal_pos=self.decimal_places,
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)
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return formatted_value
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except (InvalidOperation, ValueError):
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# If there's an error in conversion, return the original value
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return value
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return value
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def value_from_datadict(self, data, files, name):
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value = super().value_from_datadict(data, files, name)
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if value is not None:
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# Remove any non-numeric characters except for the decimal point
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value = convert_to_decimal(value)
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return value
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