• Language: en

Source code for django.contrib.postgres.forms.jsonb

import json

from django import forms
from django.utils.translation import gettext_lazy as _

__all__ = ['JSONField']


class InvalidJSONInput(str):
    pass


class JSONString(str):
    pass


[docs]class JSONField(forms.CharField): default_error_messages = { 'invalid': _("'%(value)s' value must be valid JSON."), } widget = forms.Textarea def to_python(self, value): if self.disabled: return value if value in self.empty_values: return None elif isinstance(value, (list, dict, int, float, JSONString)): return value try: converted = json.loads(value) except json.JSONDecodeError: raise forms.ValidationError( self.error_messages['invalid'], code='invalid', params={'value': value}, ) if isinstance(converted, str): return JSONString(converted) else: return converted def bound_data(self, data, initial): if self.disabled: return initial try: return json.loads(data) except json.JSONDecodeError: return InvalidJSONInput(data) def prepare_value(self, value): if isinstance(value, InvalidJSONInput): return value return json.dumps(value) def has_changed(self, initial, data): if super().has_changed(initial, data): return True # For purposes of seeing whether something has changed, True isn't the # same as 1 and the order of keys doesn't matter. data = self.to_python(data) return json.dumps(initial, sort_keys=True) != json.dumps(data, sort_keys=True)
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