added __deepcopy__ method on all fields

Author: nxexox

docs/release-notes.md

@@ -8,6 +8,12 @@ Medium version numbers (0.x.0) may include API changes, in line with the [deprec
 
 Major version numbers (x.0.0) are reserved for substantial project milestones.
 
+### 0.1.7
+
+**Date:** [1st of January 2019]
+
+* Added `__deepcopy__` method on all serializer fields.
+
 ### 0.1.6
 
 **Date**: [18th December 2018].

rest_framework/__init__.py

@@ -8,7 +8,7 @@
          __/ |
         |___/
 """
-VERSION = (0, 1, 6)
+VERSION = (0, 1, 7)
 
 __title__ = 'Python-Rest-Framework'
 __author__ = 'Deys Timofey'

rest_framework/serializers/fields.py

@@ -86,15 +86,23 @@ def __init__(self, required=True, default=None, label=None, validators=None, err
         self.default = default
         self.required = bool(required) if self.default is None else False
         # Added validator for check on required field.
+        self._src_validators = validators
         self._validators = ([RequiredValidator()] if self.required else []) + (validators or [])[:]
 
         # Make errors dict.
         messages = {}
+        self._src_messages = messages
         for cls in reversed(self.__class__.__mro__):
             messages.update(getattr(cls, 'default_error_messages', {}))
         messages.update(error_messages or {})
         self.error_messages = messages
 
+    def __deepcopy__(self, memo={}):
+        return self.__class__(
+            required=self.required, default=self.default, label=self.label,
+            validators=self._src_validators, error_messages=self._src_messages
+        )
+
     def bind(self, field_name, parent):
         """
         Initialization field name and parent instance .
@@ -378,6 +386,14 @@ def __init__(self, min_length=None, max_length=None, trim_whitespace=False, allo
             message = self.error_messages['min_length'].format(min_length=self.min_length)
             self.validators.append(MinLengthValidator(self.min_length, message=message))
 
+    def __deepcopy__(self, memo={}):
+        return self.__class__(
+            required=self.required, default=self.default, label=self.label,
+            validators=self._src_validators, error_messages=self._src_messages,
+            min_length=self.min_length, max_length=self.max_length,
+            trim_whitespace=self.trim_whitespace, allow_blank=self.allow_blank
+        )
+
     def run_validation(self, data=None):
         """
         We check for an empty string here, so that it does not fall into subclasses in `.to_internal_value ()`.
@@ -458,6 +474,13 @@ def __init__(self, min_value=None, max_value=None, *args, **kwargs):
             message = self.error_messages['max_value'].format(max_value=self.max_value)
             self.validators.append(MaxValueValidator(self.max_value, message=message))
 
+    def __deepcopy__(self, memo={}):
+        return self.__class__(
+            required=self.required, default=self.default, label=self.label,
+            validators=self._src_validators, error_messages=self._src_messages,
+            min_value=self.min_value, max_value=self.max_value
+        )
+
     def to_internal_value(self, data):
         """
         Data transformation to python object.
@@ -526,6 +549,13 @@ def __init__(self, min_value=None, max_value=None, *args, **kwargs):
             message = self.error_messages['max_value'].format(max_value=self.max_value)
             self.validators.append(MaxValueValidator(self.max_value, message=message))
 
+    def __deepcopy__(self, memo={}):
+        return self.__class__(
+            required=self.required, default=self.default, label=self.label,
+            validators=self._src_validators, error_messages=self._src_messages,
+            min_value=self.min_value, max_value=self.max_value
+        )
+
     def to_internal_value(self, data):
         """
         Data transformation to python object.
@@ -713,6 +743,14 @@ def __init__(self, child=None, min_length=None, max_length=None, allow_empty=Fal
             message = self.error_messages['min_length'].format(min_length=self.min_length)
             self.validators.append(MinLengthValidator(self.min_length, message=message))
 
+    def __deepcopy__(self, memo={}):
+        return self.__class__(
+            required=self.required, default=self.default, label=self.label,
+            validators=self._src_validators, error_messages=self._src_messages,
+            child=self.child, min_length=self.min_length, max_length=self.max_length,
+            allow_empty=self.allow_empty
+        )
+
     def to_internal_value(self, data):
         """
         Data transformation to python list object.
@@ -776,6 +814,13 @@ def __init__(self, format=None, input_format=None, *args, **kwargs):
             self.input_format = input_format
         super().__init__(*args, **kwargs)
 
+    def __deepcopy__(self, memo={}):
+        return self.__class__(
+            required=self.required, default=self.default, label=self.label,
+            validators=self._src_validators, error_messages=self._src_messages,
+            format=getattr(self, 'format'), input_format=getattr(self, 'input_format')
+        )
+
     def to_internal_value(self, data):
         """
         Data transformation to python datetime object.
@@ -868,6 +913,13 @@ def __init__(self, format=None, input_format=None, *args, **kwargs):
             self.input_format = input_format
         super().__init__(*args, **kwargs)
 
+    def __deepcopy__(self, memo={}):
+        return self.__class__(
+            required=self.required, default=self.default, label=self.label,
+            validators=self._src_validators, error_messages=self._src_messages,
+            format=getattr(self, 'format', None), input_format=getattr(self, 'input_format')
+        )
+
     def to_internal_value(self, data):
         """
         Data transformation to python datetime object.
@@ -958,6 +1010,13 @@ def __init__(self, format=None, input_format=None, *args, **kwargs):
 
         super(DateTimeField, self).__init__(*args, **kwargs)
 
+    def __deepcopy__(self, memo={}):
+        return self.__class__(
+            required=self.required, default=self.default, label=self.label,
+            validators=self._src_validators, error_messages=self._src_messages,
+            format=getattr(self, 'format'), input_format=getattr(self, 'input_format')
+        )
+
     def to_internal_value(self, data):
         """
         Data transformation to python datetime object.
@@ -1083,6 +1142,13 @@ def __init__(self, child=None, *args, **kwargs):
 
         self.child.bind(field_name='', parent=self)  # Bind child field.
 
+    def __deepcopy__(self, memo={}):
+        return self.__class__(
+            required=self.required, default=self.default, label=self.label,
+            validators=self._src_validators, error_messages=self._src_messages,
+            child=self.child
+        )
+
     def to_internal_value(self, data):
         """
         Data transformation to python JSON object.
@@ -1161,6 +1227,13 @@ def __init__(self, method_name_get=None, method_name_pop=None,  *args, **kwargs)
         self.method_name_get = method_name_get
         self.method_name_pop = method_name_pop
 
+    def __deepcopy__(self, memo={}):
+        return self.__class__(
+            required=self.required, default=self.default, label=self.label,
+            validators=self._src_validators, error_messages=self._src_messages,
+            method_name_get=self.method_name_get, method_name_pop=self.method_name_pop
+        )
+
     def bind(self, field_name, parent):
         """
         Initialization field name and parent instance .