Monitor (#2485)

* [Update]

* [Update] 修改fields

apps/common/fields/form.py

@@ -0,0 +1,63 @@
+# -*- coding: utf-8 -*-
+#
+import json
+
+from django import forms
+from django.utils import six
+from django.core.exceptions import ValidationError
+from django.utils.translation import ugettext as _
+from ..utils import get_signer
+
+signer = get_signer()
+
+__all__ = [
+    'FormDictField', 'FormEncryptCharField', 'FormEncryptDictField',
+    'FormEncryptMixin',
+]
+
+
+class FormDictField(forms.Field):
+    widget = forms.Textarea
+
+    def to_python(self, value):
+        """Returns a Python boolean object."""
+        # Explicitly check for the string 'False', which is what a hidden field
+        # will submit for False. Also check for '0', since this is what
+        # RadioSelect will provide. Because bool("True") == bool('1') == True,
+        # we don't need to handle that explicitly.
+        if isinstance(value, six.string_types):
+            value = value.replace("'", '"')
+            try:
+                value = json.loads(value)
+                return value
+            except json.JSONDecodeError:
+                return ValidationError(_("Not a valid json"))
+        else:
+            return ValidationError(_("Not a string type"))
+
+    def validate(self, value):
+        if isinstance(value, ValidationError):
+            raise value
+        if not value and self.required:
+            raise ValidationError(self.error_messages['required'], code='required')
+
+    def has_changed(self, initial, data):
+        # Sometimes data or initial may be a string equivalent of a boolean
+        # so we should run it through to_python first to get a boolean value
+        return self.to_python(initial) != self.to_python(data)
+
+
+class FormEncryptMixin:
+    pass
+
+
+class FormEncryptCharField(FormEncryptMixin, forms.CharField):
+    pass
+
+
+class FormEncryptDictField(FormEncryptMixin, FormDictField):
+    pass
+
+
+
+