emitters -> renderers

djangorestframework/mixins.py

@@ -6,6 +6,7 @@ from djangorestframework import status
 
 from django.http import HttpResponse
 from django.http.multipartparser import LimitBytes  # TODO: Use LimitedStream in compat
+
 from StringIO import StringIO
 from decimal import Decimal
 import re
@@ -233,7 +234,7 @@ class RequestMixin(object):
     
     @property
     def default_parser(self):
-        """Return the view's most preffered renderer.
+        """Return the view's most preferred renderer.
         (This has no behavioural effect, but is may be used by documenting renderers)"""        
         return self.parsers[0]
 
@@ -437,3 +438,90 @@ class AuthMixin(object):
                                     'You may need to login or otherwise authenticate the request.'})                
 
 
+########## Model Mixins ##########
+
+class ReadModelMixin(object):
+    """Behaviour to read a model instance on GET requests"""
+    def get(self, request, *args, **kwargs):
+        try:
+            if args:
+                # If we have any none kwargs then assume the last represents the primrary key
+                instance = self.model.objects.get(pk=args[-1], **kwargs)
+            else:
+                # Otherwise assume the kwargs uniquely identify the model
+                instance = self.model.objects.get(**kwargs)
+        except self.model.DoesNotExist:
+            raise ErrorResponse(status.HTTP_404_NOT_FOUND)
+
+        return instance
+
+
+class CreateModelMixin(object):
+    """Behaviour to create a model instance on POST requests"""
+    def post(self, request, *args, **kwargs):        
+        # translated 'related_field' kwargs into 'related_field_id'
+        for related_name in [field.name for field in self.model._meta.fields if isinstance(field, RelatedField)]:
+            if kwargs.has_key(related_name):
+                kwargs[related_name + '_id'] = kwargs[related_name]
+                del kwargs[related_name]
+
+        all_kw_args = dict(self.CONTENT.items() + kwargs.items())
+        if args:
+            instance = self.model(pk=args[-1], **all_kw_args)
+        else:
+            instance = self.model(**all_kw_args)
+        instance.save()
+        headers = {}
+        if hasattr(instance, 'get_absolute_url'):
+            headers['Location'] = instance.get_absolute_url()
+        return Response(status.HTTP_201_CREATED, instance, headers)
+
+
+class UpdateModelMixin(object):
+    """Behaviour to update a model instance on PUT requests"""
+    def put(self, request, *args, **kwargs):
+        # TODO: update on the url of a non-existing resource url doesn't work correctly at the moment - will end up with a new url 
+        try:
+            if args:
+                # If we have any none kwargs then assume the last represents the primrary key
+                instance = self.model.objects.get(pk=args[-1], **kwargs)
+            else:
+                # Otherwise assume the kwargs uniquely identify the model
+                instance = self.model.objects.get(**kwargs)
+
+            for (key, val) in self.CONTENT.items():
+                setattr(instance, key, val)
+        except self.model.DoesNotExist:
+            instance = self.model(**self.CONTENT)
+            instance.save()
+
+        instance.save()
+        return instance
+
+
+class DeleteModelMixin(object):
+    """Behaviour to delete a model instance on DELETE requests"""
+    def delete(self, request, *args, **kwargs):
+        try:
+            if args:
+                # If we have any none kwargs then assume the last represents the primrary key
+                instance = self.model.objects.get(pk=args[-1], **kwargs)
+            else:
+                # Otherwise assume the kwargs uniquely identify the model
+                instance = self.model.objects.get(**kwargs)
+        except self.model.DoesNotExist:
+            raise ErrorResponse(status.HTTP_404_NOT_FOUND, None, {})
+
+        instance.delete()
+        return
+
+
+class ListModelMixin(object):
+    """Behaviour to list a set of model instances on GET requests"""
+    queryset = None
+
+    def get(self, request, *args, **kwargs):
+        queryset = self.queryset if self.queryset else self.model.objects.all()
+        return queryset.filter(**kwargs)
+
+

djangorestframework/modelresource.py

@@ -341,94 +341,16 @@ class ModelResource(Resource):
         return _any(data, self.fields)
 
 
-    def get(self, request, *args, **kwargs):
-        try:
-            if args:
-                # If we have any none kwargs then assume the last represents the primrary key
-                instance = self.model.objects.get(pk=args[-1], **kwargs)
-            else:
-                # Otherwise assume the kwargs uniquely identify the model
-                instance = self.model.objects.get(**kwargs)
-        except self.model.DoesNotExist:
-            raise ErrorResponse(status.HTTP_404_NOT_FOUND)
-
-        return instance
-
-    def post(self, request, *args, **kwargs):
-        # TODO: test creation on a non-existing resource url
-        
-        # translated related_field into related_field_id
-        for related_name in [field.name for field in self.model._meta.fields if isinstance(field, RelatedField)]:
-            if kwargs.has_key(related_name):
-                kwargs[related_name + '_id'] = kwargs[related_name]
-                del kwargs[related_name]
         
-        all_kw_args = dict(self.CONTENT.items() + kwargs.items())
-        if args:
-            instance = self.model(pk=args[-1], **all_kw_args)
-        else:
-            instance = self.model(**all_kw_args)
-        instance.save()
-        headers = {}
-        if hasattr(instance, 'get_absolute_url'):
-            headers['Location'] = instance.get_absolute_url()
-        return Response(status.HTTP_201_CREATED, instance, headers)
-
-    def put(self, request, *args, **kwargs):
-        # TODO: update on the url of a non-existing resource url doesn't work correctly at the moment - will end up with a new url 
-        try:
-            if args:
-                # If we have any none kwargs then assume the last represents the primrary key
-                instance = self.model.objects.get(pk=args[-1], **kwargs)
-            else:
-                # Otherwise assume the kwargs uniquely identify the model
-                instance = self.model.objects.get(**kwargs)
-
-            for (key, val) in self.CONTENT.items():
-                setattr(instance, key, val)
-        except self.model.DoesNotExist:
-            instance = self.model(**self.CONTENT)
-            instance.save()
-
-        instance.save()
-        return instance
-
-    def delete(self, request, *args, **kwargs):
-        try:
-            if args:
-                # If we have any none kwargs then assume the last represents the primrary key
-                instance = self.model.objects.get(pk=args[-1], **kwargs)
-            else:
-                # Otherwise assume the kwargs uniquely identify the model
-                instance = self.model.objects.get(**kwargs)
-        except self.model.DoesNotExist:
-            raise ErrorResponse(status.HTTP_404_NOT_FOUND, None, {})
 
-        instance.delete()
-        return
+class InstanceModelResource(ReadModelMixin, UpdateModelMixin, DeleteModelMixin, ModelResource):
+    """A view which provides default operations for read/update/delete against a model instance."""
+    pass
 
-
-class InstanceModelResource(ModelResource):
-    http_method_names = ['get', 'put', 'delete', 'head', 'options', 'trace', 'patch']  # Bit of a hack, these - needs fixing.
-
-class RootModelResource(ModelResource):
+class ListOrCreateModelResource(CreateModelMixin, ListModelMixin, ModelResource):
     """A Resource which provides default operations for list and create."""
-    queryset = None
-
-    def get(self, request, *args, **kwargs):
-        queryset = self.queryset if self.queryset else self.model.objects.all()
-        return queryset.filter(**kwargs)
-
-    http_method_names = ['get', 'post', 'head', 'options', 'trace', 'patch']
-
-class QueryModelResource(ModelResource):
-    """Resource with default operations for list.
-    TODO: provide filter/order/num_results/paging, and a create operation to create queries."""
-    allowed_methods = ('GET',)
-    queryset = None
-
-    def get(self, request, *args, **kwargs):
-        queryset = self.queryset if self.queryset else self.model.objects.all()
-        return queryset.filer(**kwargs)
+    pass
 
-    http_method_names = ['get', 'head', 'options', 'trace', 'patch']
+class ListModelResource(ListModelMixin, ModelResource):
+    """Resource with default operations for list."""
+    pass
\ No newline at end of file

djangorestframework/renderers.py

@@ -43,7 +43,7 @@ class BaseRenderer(object):
 
 class TemplateRenderer(BaseRenderer):
     """Provided for convienience.
-    Emit the output by simply rendering it with the given template."""
+    Render the output by simply rendering it with the given template."""
     media_type = None
     template = None
 

djangorestframework/resource.py

@@ -19,8 +19,6 @@ class Resource(RequestMixin, ResponseMixin, AuthMixin, View):
     """Handles incoming requests and maps them to REST operations.
     Performs request deserialization, response serialization, authentication and input validation."""
 
-    http_method_names = ['get', 'post', 'put', 'delete', 'head', 'options', 'trace', 'patch']
-
     # List of renderers the resource can serialize the response with, ordered by preference.
     renderers = ( renderers.JSONRenderer,
                   renderers.DocumentingHTMLRenderer,

examples/blogpost/models.py

@@ -12,6 +12,8 @@ RATING_CHOICES = ((0, 'Awful'),
                   (3, 'Good'),
                   (4, 'Excellent'))
 
+MAX_POSTS = 10
+
 class BlogPost(models.Model):
     key = models.CharField(primary_key=True, max_length=64, default=uuid_str, editable=False)
     title = models.CharField(max_length=128)
@@ -38,9 +40,10 @@ class BlogPost(models.Model):
     def save(self, *args, **kwargs):
         self.slug = slugify(self.title)
         super(self.__class__, self).save(*args, **kwargs)
-        for obj in self.__class__.objects.order_by('-pk')[10:]:
+        for obj in self.__class__.objects.order_by('-pk')[MAX_POSTS:]:
             obj.delete()
 
+
 class Comment(models.Model):
     blogpost = models.ForeignKey(BlogPost, editable=False, related_name='comments')
     username = models.CharField(max_length=128)

examples/blogpost/views.py

-from djangorestframework.modelresource import InstanceModelResource, RootModelResource
+from djangorestframework.modelresource import InstanceModelResource, ListOrCreateModelResource
 
 from blogpost import models
 
 BLOG_POST_FIELDS = ('created', 'title', 'slug', 'content', 'absolute_url', 'comment_url', 'comments_url')
 COMMENT_FIELDS = ('username', 'comment', 'created', 'rating', 'absolute_url', 'blogpost_url')
-MAX_POSTS = 10
 
-class BlogPosts(RootModelResource):
+class BlogPosts(ListOrCreateModelResource):
     """A resource with which lists all existing blog posts and creates new blog posts."""
     model = models.BlogPost
     fields = BLOG_POST_FIELDS
@@ -16,7 +15,7 @@ class BlogPostInstance(InstanceModelResource):
     model = models.BlogPost
     fields = BLOG_POST_FIELDS
 
-class Comments(RootModelResource):
+class Comments(ListOrCreateModelResource):
     """A resource which lists all existing comments for a given blog post, and creates new blog comments for a given blog post."""
     model = models.Comment
     fields = COMMENT_FIELDS

examples/mixin/urls.py

@@ -15,7 +15,7 @@ class ExampleView(ResponseMixin, View):
     def get(self, request):
         response = Response(200, {'description': 'Some example content',
                                   'url': reverse('mixin-view')})
-        return self.emit(response)
+        return self.render(response)
 
 
 urlpatterns = patterns('',

examples/pygments_api/views.py

@@ -68,7 +68,7 @@ class PygmentsRoot(Resource):
 
 class PygmentsInstance(Resource):
     """Simply return the stored highlighted HTML file with the correct mime type.
-    This Resource only emits HTML and uses a standard HTML renderer rather than the renderers.DocumentingHTMLRenderer class."""
+    This Resource only renders HTML and uses a standard HTML renderer rather than the renderers.DocumentingHTMLRenderer class."""
     renderers = (HTMLRenderer,)
 
     def get(self, request, unique_id):