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99 lines
2.8 KiB
Python
99 lines
2.8 KiB
Python
# Copyright (c) 2016 Ansible, Inc.
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# All Rights Reserved.
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# Django
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from django.utils.translation import gettext_lazy as _
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from django.core.exceptions import ObjectDoesNotExist
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# Django REST Framework
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from rest_framework import serializers
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# AWX
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from awx.main.models import Credential
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__all__ = ['BooleanNullField', 'CharNullField', 'ChoiceNullField', 'VerbatimField']
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class NullFieldMixin(object):
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"""
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Mixin to prevent shortcutting validation when we want to allow null input,
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but coerce the resulting value to another type.
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"""
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def validate_empty_values(self, data):
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is_empty_value, data = super(NullFieldMixin, self).validate_empty_values(data)
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if is_empty_value and data is None:
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return (False, data)
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return (is_empty_value, data)
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class BooleanNullField(NullFieldMixin, serializers.BooleanField):
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"""
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Custom boolean field that allows null and empty string as False values.
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"""
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def __init__(self, **kwargs):
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kwargs['allow_null'] = True
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super().__init__(**kwargs)
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def to_internal_value(self, data):
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return bool(super().to_internal_value(data))
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class CharNullField(NullFieldMixin, serializers.CharField):
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"""
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Custom char field that allows null as input and coerces to an empty string.
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"""
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def __init__(self, **kwargs):
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kwargs['allow_null'] = True
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super(CharNullField, self).__init__(**kwargs)
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def to_internal_value(self, data):
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return super(CharNullField, self).to_internal_value(data or '')
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class ChoiceNullField(NullFieldMixin, serializers.ChoiceField):
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"""
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Custom choice field that allows null as input and coerces to an empty string.
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"""
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def __init__(self, **kwargs):
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kwargs['allow_null'] = True
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super(ChoiceNullField, self).__init__(**kwargs)
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def to_internal_value(self, data):
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return super(ChoiceNullField, self).to_internal_value(data or '')
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class VerbatimField(serializers.Field):
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"""
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Custom field that passes the value through without changes.
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"""
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def to_internal_value(self, data):
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return data
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def to_representation(self, value):
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return value
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class DeprecatedCredentialField(serializers.IntegerField):
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def __init__(self, **kwargs):
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kwargs['allow_null'] = True
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kwargs['default'] = None
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kwargs['min_value'] = 1
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kwargs.setdefault('help_text', 'This resource has been deprecated and will be removed in a future release')
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super(DeprecatedCredentialField, self).__init__(**kwargs)
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def to_internal_value(self, pk):
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try:
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pk = int(pk)
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except ValueError:
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self.fail('invalid')
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try:
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Credential.objects.get(pk=pk)
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except ObjectDoesNotExist:
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raise serializers.ValidationError(_('Credential {} does not exist').format(pk))
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return pk
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