Added help_text argument to fields

rest_framework/compat.py

@@ -39,6 +39,17 @@ except ImportError:
     django_filters = None
 
 
+if django.VERSION >= (1, 6):
+    def clean_manytomany_helptext(text):
+        return text
+else:
+    # Up to version 1.5 many to many fields automatically suffix
+    # the `help_text` attribute with hardcoded text.
+    def clean_manytomany_helptext(text):
+        if text.endswith(' Hold down "Control", or "Command" on a Mac, to select more than one.'):
+            text = text[:-69]
+        return text
+
 # Django-guardian is optional. Import only if guardian is in INSTALLED_APPS
 # Fixes (#1712). We keep the try/except for the test suite.
 guardian = None
@@ -99,18 +110,8 @@ def get_concrete_model(model_cls):
         return model_cls
 
 
-# View._allowed_methods only present from 1.5 onwards
-if django.VERSION >= (1, 5):
-    from django.views.generic import View
-else:
-    from django.views.generic import View as DjangoView
-
-    class View(DjangoView):
-        def _allowed_methods(self):
-            return [m.upper() for m in self.http_method_names if hasattr(self, m)]
-
-
 # PATCH method is not implemented by Django
+from django.views.generic import View
 if 'patch' not in View.http_method_names:
     View.http_method_names = View.http_method_names + ['patch']
 

rest_framework/fields.py

@@ -101,7 +101,8 @@ class Field(object):
 
     def __init__(self, read_only=False, write_only=False,
                  required=None, default=empty, initial=None, source=None,
-                 label=None, style=None, error_messages=None, validators=[]):
+                 label=None, help_text=None, style=None,
+                 error_messages=None, validators=[]):
         self._creation_counter = Field._creation_counter
         Field._creation_counter += 1
 
@@ -122,6 +123,7 @@ class Field(object):
         self.source = source
         self.initial = initial
         self.label = label
+        self.help_text = help_text
         self.style = {} if style is None else style
         self.validators = validators or self.default_validators[:]
 
@@ -372,7 +374,6 @@ class IntegerField(Field):
             self.validators.append(validators.MaxValueValidator(max_value))
         if min_value is not None:
             self.validators.append(validators.MinValueValidator(min_value))
-        print self.__class__.__name__, self.validators
 
     def to_native(self, data):
         try:

rest_framework/serializers.py

@@ -15,6 +15,7 @@ from django.core.exceptions import ValidationError
 from django.db import models
 from django.utils import six
 from collections import namedtuple, OrderedDict
+from rest_framework.compat import clean_manytomany_helptext
 from rest_framework.fields import empty, set_value, Field, SkipField
 from rest_framework.settings import api_settings
 from rest_framework.utils import html, modelinfo, representation
@@ -117,8 +118,9 @@ class SerializerMetaclass(type):
     """
     This metaclass sets a dictionary named `base_fields` on the class.
 
-    Any fields included as attributes on either the class or it's superclasses
-    will be include in the `base_fields` dictionary.
+    Any instances of `Field` included as attributes on either the class
+    or on any of its superclasses will be include in the
+    `base_fields` dictionary.
     """
 
     @classmethod
@@ -379,6 +381,10 @@ class ModelSerializer(Serializer):
         info = modelinfo.get_field_info(self.opts.model)
         ret = OrderedDict()
 
+        serializer_url_field = self.get_url_field()
+        if serializer_url_field:
+            ret[api_settings.URL_FIELD_NAME] = serializer_url_field
+
         serializer_pk_field = self.get_pk_field(info.pk)
         if serializer_pk_field:
             ret[info.pk.name] = serializer_pk_field
@@ -404,6 +410,9 @@ class ModelSerializer(Serializer):
 
         return ret
 
+    def get_url_field(self):
+        return None
+
     def get_pk_field(self, model_field):
         """
         Returns a default instance of the pk field.
@@ -446,13 +455,14 @@ class ModelSerializer(Serializer):
         if model_field:
             if model_field.null or model_field.blank:
                 kwargs['required'] = False
-            #  if model_field.help_text is not None:
-            #      kwargs['help_text'] = model_field.help_text
-            if model_field.verbose_name is not None:
+            if model_field.verbose_name:
                 kwargs['label'] = model_field.verbose_name
             if not model_field.editable:
                 kwargs['read_only'] = True
                 kwargs.pop('queryset', None)
+            help_text = clean_manytomany_helptext(model_field.help_text)
+            if help_text:
+                kwargs['help_text'] = help_text
 
         return PrimaryKeyRelatedField(**kwargs)
 
@@ -469,6 +479,9 @@ class ModelSerializer(Serializer):
         if model_field.verbose_name is not None:
             kwargs['label'] = model_field.verbose_name
 
+        if model_field.help_text:
+            kwargs['help_text'] = model_field.help_text
+
         if isinstance(model_field, models.AutoField) or not model_field.editable:
             kwargs['read_only'] = True
             # Read only implies that the field is not required.
@@ -481,6 +494,14 @@ class ModelSerializer(Serializer):
             # We have a cleaner repr on the instance if we don't set it.
             kwargs.pop('required', None)
 
+        if model_field.flatchoices:
+            # If this model field contains choices, then use a ChoiceField,
+            # rather than the standard serializer field for this type.
+            # Note that we return this prior to setting any validation type
+            # keyword arguments, as those are not valid initializers.
+            kwargs['choices'] = model_field.flatchoices
+            return ChoiceField(**kwargs)
+
         # Ensure that max_length is passed explicitly as a keyword arg,
         # rather than as a validator.
         max_length = getattr(model_field, 'max_length', None)
@@ -561,23 +582,6 @@ class ModelSerializer(Serializer):
         if validator_kwarg:
             kwargs['validators'] = validator_kwarg
 
-        # if issubclass(model_field.__class__, models.TextField):
-        #     kwargs['widget'] = widgets.Textarea
-
-        # if model_field.help_text is not None:
-        #     kwargs['help_text'] = model_field.help_text
-
-        # TODO: TypedChoiceField?
-        if model_field.flatchoices:  # This ModelField contains choices
-            kwargs['choices'] = model_field.flatchoices
-            if model_field.null:
-                kwargs['empty'] = None
-            return ChoiceField(**kwargs)
-
-        if model_field.null and \
-                issubclass(model_field.__class__, (models.CharField, models.TextField)):
-            kwargs['allow_none'] = True
-
         try:
             return self.field_mapping[model_field.__class__](**kwargs)
         except KeyError:
@@ -597,33 +601,24 @@ class HyperlinkedModelSerializerOptions(ModelSerializerOptions):
 class HyperlinkedModelSerializer(ModelSerializer):
     _options_class = HyperlinkedModelSerializerOptions
 
-    def get_default_fields(self):
-        fields = super(HyperlinkedModelSerializer, self).get_default_fields()
-
-        if self.opts.view_name is None:
-            self.opts.view_name = self.get_default_view_name(self.opts.model)
-
-        url_field_name = api_settings.URL_FIELD_NAME
-        if url_field_name not in fields:
-            ret = fields.__class__()
-            ret[url_field_name] = self.get_url_field()
-            ret.update(fields)
-            fields = ret
-
-        return fields
-
-    def get_pk_field(self, model_field):
-        if self.opts.fields and model_field.name in self.opts.fields:
-            return self.get_field(model_field)
-
     def get_url_field(self):
+        if self.opts.view_name is not None:
+            view_name = self.opts.view_name
+        else:
+            view_name = self.get_default_view_name(self.opts.model)
+
         kwargs = {
-            'view_name': self.get_default_view_name(self.opts.model)
+            'view_name': view_name
         }
         if self.opts.lookup_field:
             kwargs['lookup_field'] = self.opts.lookup_field
+
         return HyperlinkedIdentityField(**kwargs)
 
+    def get_pk_field(self, model_field):
+        if self.opts.fields and model_field.name in self.opts.fields:
+            return self.get_field(model_field)
+
     def get_related_field(self, model_field, related_model, to_many, has_through_model):
         """
         Creates a default instance of a flat relational field.
@@ -643,13 +638,14 @@ class HyperlinkedModelSerializer(ModelSerializer):
         if model_field:
             if model_field.null or model_field.blank:
                 kwargs['required'] = False
-            # if model_field.help_text is not None:
-            #     kwargs['help_text'] = model_field.help_text
-            if model_field.verbose_name is not None:
+            if model_field.verbose_name:
                 kwargs['label'] = model_field.verbose_name
             if not model_field.editable:
                 kwargs['read_only'] = True
                 kwargs.pop('queryset', None)
+            help_text = clean_manytomany_helptext(model_field.help_text)
+            if help_text:
+                kwargs['help_text'] = help_text
 
         return HyperlinkedRelatedField(**kwargs)