30 lines
1.2 KiB
Python
30 lines
1.2 KiB
Python
from django.core.exceptions import ValidationError
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from django.utils.functional import SimpleLazyObject
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from django.utils.text import format_lazy
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def prefix_validation_error(error, prefix, code, params):
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"""
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Prefix a validation error message while maintaining the existing
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validation data structure.
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"""
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if error.error_list == [error]:
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error_params = error.params or {}
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return ValidationError(
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# We can't simply concatenate messages since they might require
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# their associated parameters to be expressed correctly which
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# is not something `format_lazy` does. For example, proxied
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# ngettext calls require a count parameter and are converted
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# to an empty string if they are missing it.
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message=format_lazy(
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'{} {}',
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SimpleLazyObject(lambda: prefix % params),
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SimpleLazyObject(lambda: error.message % error_params),
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),
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code=code,
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params={**error_params, **params},
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)
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return ValidationError([
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prefix_validation_error(e, prefix, code, params) for e in error.error_list
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])
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