Fix rendering of forms and add error rendering on HTML form

rest_framework/renderers.py

@@ -419,6 +419,13 @@ class BrowsableAPIRenderer(BaseRenderer):
 
         In the absence of the View having an associated form then return None.
         """
+        if request.method == method:
+            data = request.DATA
+            files = request.FILES
+        else:
+            data = None
+            files = None
+
         with override_method(view, request, method) as request:
             obj = getattr(view, 'object', None)
             if not self.show_form_for_method(view, method, request, obj):
@@ -431,9 +438,10 @@ class BrowsableAPIRenderer(BaseRenderer):
                 or not any(is_form_media_type(parser.media_type) for parser in view.parser_classes)):
                 return
 
-            serializer = view.get_serializer(instance=obj)
-
+            serializer = view.get_serializer(instance=obj, data=data, files=files)
+            serializer.is_valid()
             data = serializer.data
+
             form_renderer = self.form_renderer_class()
             return form_renderer.render(data, self.accepted_media_type, self.renderer_context)
 
@@ -525,6 +533,7 @@ class BrowsableAPIRenderer(BaseRenderer):
 
         renderer = self.get_default_renderer(view)
 
+        raw_data_post_form = self.get_raw_data_form(view, 'POST', request)
         raw_data_put_form = self.get_raw_data_form(view, 'PUT', request)
         raw_data_patch_form = self.get_raw_data_form(view, 'PATCH', request)
         raw_data_put_or_patch_form = raw_data_put_form or raw_data_patch_form
@@ -543,12 +552,11 @@ class BrowsableAPIRenderer(BaseRenderer):
 
             'put_form': self.get_rendered_html_form(view, 'PUT', request),
             'post_form': self.get_rendered_html_form(view, 'POST', request),
-            'patch_form': self.get_rendered_html_form(view, 'PATCH', request),
             'delete_form': self.get_rendered_html_form(view, 'DELETE', request),
             'options_form': self.get_rendered_html_form(view, 'OPTIONS', request),
 
             'raw_data_put_form': raw_data_put_form,
-            'raw_data_post_form': self.get_raw_data_form(view, 'POST', request),
+            'raw_data_post_form': raw_data_post_form,
             'raw_data_patch_form': raw_data_patch_form,
             'raw_data_put_or_patch_form': raw_data_put_or_patch_form,
 

rest_framework/serializers.py

@@ -308,24 +308,14 @@ class BaseSerializer(WritableField):
         """
         ret = self._dict_class()
         ret.fields = self._dict_class()
-        ret.empty = obj is None
 
         for field_name, field in self.fields.items():
             field.initialize(parent=self, field_name=field_name)
             key = self.get_field_key(field_name)
-            if self._errors:
-                value = self.init_data.get(field_name)
-            else:
             value = field.field_to_native(obj, field_name)
-
-            field._errors = self._errors.get(key) if self._errors else None
-            field._name = field_name
-            field._value = value
-            if not field.label:
-                field.label = pretty_name(key)
-
             ret[key] = value
-            ret.fields[key] = field
+            ret.fields[key] = self.augment_field(field, field_name, key, value)
+
         return ret
 
     def from_native(self, data, files):
@@ -333,6 +323,7 @@ class BaseSerializer(WritableField):
         Deserialize primitives -> objects.
         """
         self._errors = {}
+
         if data is not None or files is not None:
             attrs = self.restore_fields(data, files)
             if attrs is not None:
@@ -343,6 +334,15 @@ class BaseSerializer(WritableField):
         if not self._errors:
             return self.restore_object(attrs, instance=getattr(self, 'object', None))
 
+    def augment_field(self, field, field_name, key, value):
+        # This horrible stuff is to manage serializers rendering to HTML
+        field._errors = self._errors.get(key) if self._errors else None
+        field._name = field_name
+        field._value = self.init_data.get(key) if self._errors and self.init_data else value
+        if not field.label:
+            field.label = pretty_name(key)
+        return field
+
     def field_to_native(self, obj, field_name):
         """
         Override default so that the serializer can be used as a nested field

rest_framework/templates/rest_framework/base.html

@@ -151,7 +151,7 @@
                             {% with form=raw_data_post_form %}
                             <form action="{{ request.get_full_path }}" method="POST" class="form-horizontal">
                                 <fieldset>
-                                    {% include "rest_framework/form.html" %}
+                                    {% include "rest_framework/raw_data_form.html" %}
                                     <div class="form-actions">
                                         <button class="btn btn-primary" title="Make a POST request on the {{ name }} resource">POST</button>
                                     </div>
@@ -188,7 +188,7 @@
                             {% with form=raw_data_put_or_patch_form %}
                             <form action="{{ request.get_full_path }}" method="POST" class="form-horizontal">
                                 <fieldset>
-                                    {% include "rest_framework/form.html" %}
+                                    {% include "rest_framework/raw_data_form.html" %}
                                     <div class="form-actions">
                                         {% if raw_data_put_form %}
                                         <button class="btn btn-primary js-tooltip" name="{{ api_settings.FORM_METHOD_OVERRIDE }}" value="PUT" title="Make a PUT request on the {{ name }} resource">PUT</button>

rest_framework/templates/rest_framework/raw_data_form.html

@@ -0,0 +1,12 @@
+{% load rest_framework %}
+{% csrf_token %}
+{{ form.non_field_errors }}
+{% for field in form %}
+    <div class="control-group">
+        {{ field.label_tag|add_class:"control-label" }}
+        <div class="controls">
+            {{ field }}
+            <span class="help-block">{{ field.help_text }}</span>
+        </div>
+    </div>
+{% endfor %}