First pass

This commit is contained in:
Tom Christie 2014-08-29 16:46:26 +01:00
parent 371d30aa87
commit 4ac4676a40
9 changed files with 714 additions and 2368 deletions

File diff suppressed because it is too large Load Diff

View File

@ -79,18 +79,16 @@ class GenericAPIView(views.APIView):
'view': self
}
def get_serializer(self, instance=None, data=None, files=None, many=False,
partial=False, allow_add_remove=False):
def get_serializer(self, instance=None, data=None, many=False, partial=False):
"""
Return the serializer instance that should be used for validating and
deserializing input, and for serializing output.
"""
serializer_class = self.get_serializer_class()
context = self.get_serializer_context()
return serializer_class(instance, data=data, files=files,
many=many, partial=partial,
allow_add_remove=allow_add_remove,
context=context)
return serializer_class(
instance, data=data, many=many, partial=partial, context=context
)
def get_pagination_serializer(self, page):
"""

View File

@ -36,12 +36,10 @@ class CreateModelMixin(object):
Create a model instance.
"""
def create(self, request, *args, **kwargs):
serializer = self.get_serializer(data=request.DATA, files=request.FILES)
serializer = self.get_serializer(data=request.DATA)
if serializer.is_valid():
self.pre_save(serializer.object)
self.object = serializer.save(force_insert=True)
self.post_save(self.object, created=True)
self.object = serializer.save()
headers = self.get_success_headers(serializer.data)
return Response(serializer.data, status=status.HTTP_201_CREATED,
headers=headers)
@ -90,26 +88,20 @@ class UpdateModelMixin(object):
partial = kwargs.pop('partial', False)
self.object = self.get_object_or_none()
serializer = self.get_serializer(self.object, data=request.DATA,
files=request.FILES, partial=partial)
serializer = self.get_serializer(self.object, data=request.DATA, partial=partial)
if not serializer.is_valid():
return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
try:
self.pre_save(serializer.object)
except ValidationError as err:
# full_clean on model instance may be called in pre_save,
# so we have to handle eventual errors.
return Response(err.message_dict, status=status.HTTP_400_BAD_REQUEST)
lookup_url_kwarg = self.lookup_url_kwarg or self.lookup_field
lookup_value = self.kwargs[lookup_url_kwarg]
extras = {self.lookup_field: lookup_value}
if self.object is None:
self.object = serializer.save(force_insert=True)
self.post_save(self.object, created=True)
self.object = serializer.save(extras=extras)
return Response(serializer.data, status=status.HTTP_201_CREATED)
self.object = serializer.save(force_update=True)
self.post_save(self.object, created=False)
self.object = serializer.save(extras=extras)
return Response(serializer.data, status=status.HTTP_200_OK)
def partial_update(self, request, *args, **kwargs):

View File

@ -48,17 +48,17 @@ class DefaultObjectSerializer(serializers.Field):
super(DefaultObjectSerializer, self).__init__(source=source)
class PaginationSerializerOptions(serializers.SerializerOptions):
"""
An object that stores the options that may be provided to a
pagination serializer by using the inner `Meta` class.
# class PaginationSerializerOptions(serializers.SerializerOptions):
# """
# An object that stores the options that may be provided to a
# pagination serializer by using the inner `Meta` class.
Accessible on the instance as `serializer.opts`.
"""
def __init__(self, meta):
super(PaginationSerializerOptions, self).__init__(meta)
self.object_serializer_class = getattr(meta, 'object_serializer_class',
DefaultObjectSerializer)
# Accessible on the instance as `serializer.opts`.
# """
# def __init__(self, meta):
# super(PaginationSerializerOptions, self).__init__(meta)
# self.object_serializer_class = getattr(meta, 'object_serializer_class',
# DefaultObjectSerializer)
class BasePaginationSerializer(serializers.Serializer):
@ -66,7 +66,7 @@ class BasePaginationSerializer(serializers.Serializer):
A base class for pagination serializers to inherit from,
to make implementing custom serializers more easy.
"""
_options_class = PaginationSerializerOptions
# _options_class = PaginationSerializerOptions
results_field = 'results'
def __init__(self, *args, **kwargs):

View File

@ -1,486 +0,0 @@
"""
Serializer fields that deal with relationships.
These fields allow you to specify the style that should be used to represent
model relationships, including hyperlinks, primary keys, or slugs.
"""
from __future__ import unicode_literals
from django.core.exceptions import ObjectDoesNotExist, ValidationError
from django.core.urlresolvers import resolve, get_script_prefix, NoReverseMatch
from django import forms
from django.db.models.fields import BLANK_CHOICE_DASH
from django.forms import widgets
from django.forms.models import ModelChoiceIterator
from django.utils.translation import ugettext_lazy as _
from rest_framework.fields import Field, WritableField, get_component, is_simple_callable
from rest_framework.reverse import reverse
from rest_framework.compat import urlparse
from rest_framework.compat import smart_text
# Relational fields
# Not actually Writable, but subclasses may need to be.
class RelatedField(WritableField):
"""
Base class for related model fields.
This represents a relationship using the unicode representation of the target.
"""
widget = widgets.Select
many_widget = widgets.SelectMultiple
form_field_class = forms.ChoiceField
many_form_field_class = forms.MultipleChoiceField
null_values = (None, '', 'None')
cache_choices = False
empty_label = None
read_only = True
many = False
def __init__(self, *args, **kwargs):
queryset = kwargs.pop('queryset', None)
self.many = kwargs.pop('many', self.many)
if self.many:
self.widget = self.many_widget
self.form_field_class = self.many_form_field_class
kwargs['read_only'] = kwargs.pop('read_only', self.read_only)
super(RelatedField, self).__init__(*args, **kwargs)
if not self.required:
# Accessed in ModelChoiceIterator django/forms/models.py:1034
# If set adds empty choice.
self.empty_label = BLANK_CHOICE_DASH[0][1]
self.queryset = queryset
def initialize(self, parent, field_name):
super(RelatedField, self).initialize(parent, field_name)
if self.queryset is None and not self.read_only:
manager = getattr(self.parent.opts.model, self.source or field_name)
if hasattr(manager, 'related'): # Forward
self.queryset = manager.related.model._default_manager.all()
else: # Reverse
self.queryset = manager.field.rel.to._default_manager.all()
# We need this stuff to make form choices work...
def prepare_value(self, obj):
return self.to_native(obj)
def label_from_instance(self, obj):
"""
Return a readable representation for use with eg. select widgets.
"""
desc = smart_text(obj)
ident = smart_text(self.to_native(obj))
if desc == ident:
return desc
return "%s - %s" % (desc, ident)
def _get_queryset(self):
return self._queryset
def _set_queryset(self, queryset):
self._queryset = queryset
self.widget.choices = self.choices
queryset = property(_get_queryset, _set_queryset)
def _get_choices(self):
# If self._choices is set, then somebody must have manually set
# the property self.choices. In this case, just return self._choices.
if hasattr(self, '_choices'):
return self._choices
# Otherwise, execute the QuerySet in self.queryset to determine the
# choices dynamically. Return a fresh ModelChoiceIterator that has not been
# consumed. Note that we're instantiating a new ModelChoiceIterator *each*
# time _get_choices() is called (and, thus, each time self.choices is
# accessed) so that we can ensure the QuerySet has not been consumed. This
# construct might look complicated but it allows for lazy evaluation of
# the queryset.
return ModelChoiceIterator(self)
def _set_choices(self, value):
# Setting choices also sets the choices on the widget.
# choices can be any iterable, but we call list() on it because
# it will be consumed more than once.
self._choices = self.widget.choices = list(value)
choices = property(_get_choices, _set_choices)
# Default value handling
def get_default_value(self):
default = super(RelatedField, self).get_default_value()
if self.many and default is None:
return []
return default
# Regular serializer stuff...
def field_to_native(self, obj, field_name):
try:
if self.source == '*':
return self.to_native(obj)
source = self.source or field_name
value = obj
for component in source.split('.'):
if value is None:
break
value = get_component(value, component)
except ObjectDoesNotExist:
return None
if value is None:
return None
if self.many:
if is_simple_callable(getattr(value, 'all', None)):
return [self.to_native(item) for item in value.all()]
else:
# Also support non-queryset iterables.
# This allows us to also support plain lists of related items.
return [self.to_native(item) for item in value]
return self.to_native(value)
def field_from_native(self, data, files, field_name, into):
if self.read_only:
return
try:
if self.many:
try:
# Form data
value = data.getlist(field_name)
if value == [''] or value == []:
raise KeyError
except AttributeError:
# Non-form data
value = data[field_name]
else:
value = data[field_name]
except KeyError:
if self.partial:
return
value = self.get_default_value()
if value in self.null_values:
if self.required:
raise ValidationError(self.error_messages['required'])
into[(self.source or field_name)] = None
elif self.many:
into[(self.source or field_name)] = [self.from_native(item) for item in value]
else:
into[(self.source or field_name)] = self.from_native(value)
# PrimaryKey relationships
class PrimaryKeyRelatedField(RelatedField):
"""
Represents a relationship as a pk value.
"""
read_only = False
default_error_messages = {
'does_not_exist': _("Invalid pk '%s' - object does not exist."),
'incorrect_type': _('Incorrect type. Expected pk value, received %s.'),
}
# TODO: Remove these field hacks...
def prepare_value(self, obj):
return self.to_native(obj.pk)
def label_from_instance(self, obj):
"""
Return a readable representation for use with eg. select widgets.
"""
desc = smart_text(obj)
ident = smart_text(self.to_native(obj.pk))
if desc == ident:
return desc
return "%s - %s" % (desc, ident)
# TODO: Possibly change this to just take `obj`, through prob less performant
def to_native(self, pk):
return pk
def from_native(self, data):
if self.queryset is None:
raise Exception('Writable related fields must include a `queryset` argument')
try:
return self.queryset.get(pk=data)
except ObjectDoesNotExist:
msg = self.error_messages['does_not_exist'] % smart_text(data)
raise ValidationError(msg)
except (TypeError, ValueError):
received = type(data).__name__
msg = self.error_messages['incorrect_type'] % received
raise ValidationError(msg)
def field_to_native(self, obj, field_name):
if self.many:
# To-many relationship
queryset = None
if not self.source:
# Prefer obj.serializable_value for performance reasons
try:
queryset = obj.serializable_value(field_name)
except AttributeError:
pass
if queryset is None:
# RelatedManager (reverse relationship)
source = self.source or field_name
queryset = obj
for component in source.split('.'):
if queryset is None:
return []
queryset = get_component(queryset, component)
# Forward relationship
if is_simple_callable(getattr(queryset, 'all', None)):
return [self.to_native(item.pk) for item in queryset.all()]
else:
# Also support non-queryset iterables.
# This allows us to also support plain lists of related items.
return [self.to_native(item.pk) for item in queryset]
# To-one relationship
try:
# Prefer obj.serializable_value for performance reasons
pk = obj.serializable_value(self.source or field_name)
except AttributeError:
# RelatedObject (reverse relationship)
try:
pk = getattr(obj, self.source or field_name).pk
except (ObjectDoesNotExist, AttributeError):
return None
# Forward relationship
return self.to_native(pk)
# Slug relationships
class SlugRelatedField(RelatedField):
"""
Represents a relationship using a unique field on the target.
"""
read_only = False
default_error_messages = {
'does_not_exist': _("Object with %s=%s does not exist."),
'invalid': _('Invalid value.'),
}
def __init__(self, *args, **kwargs):
self.slug_field = kwargs.pop('slug_field', None)
assert self.slug_field, 'slug_field is required'
super(SlugRelatedField, self).__init__(*args, **kwargs)
def to_native(self, obj):
return getattr(obj, self.slug_field)
def from_native(self, data):
if self.queryset is None:
raise Exception('Writable related fields must include a `queryset` argument')
try:
return self.queryset.get(**{self.slug_field: data})
except ObjectDoesNotExist:
raise ValidationError(self.error_messages['does_not_exist'] %
(self.slug_field, smart_text(data)))
except (TypeError, ValueError):
msg = self.error_messages['invalid']
raise ValidationError(msg)
# Hyperlinked relationships
class HyperlinkedRelatedField(RelatedField):
"""
Represents a relationship using hyperlinking.
"""
read_only = False
lookup_field = 'pk'
default_error_messages = {
'no_match': _('Invalid hyperlink - No URL match'),
'incorrect_match': _('Invalid hyperlink - Incorrect URL match'),
'configuration_error': _('Invalid hyperlink due to configuration error'),
'does_not_exist': _("Invalid hyperlink - object does not exist."),
'incorrect_type': _('Incorrect type. Expected url string, received %s.'),
}
def __init__(self, *args, **kwargs):
try:
self.view_name = kwargs.pop('view_name')
except KeyError:
raise ValueError("Hyperlinked field requires 'view_name' kwarg")
self.lookup_field = kwargs.pop('lookup_field', self.lookup_field)
self.format = kwargs.pop('format', None)
super(HyperlinkedRelatedField, self).__init__(*args, **kwargs)
def get_url(self, obj, view_name, request, format):
"""
Given an object, return the URL that hyperlinks to the object.
May raise a `NoReverseMatch` if the `view_name` and `lookup_field`
attributes are not configured to correctly match the URL conf.
"""
lookup_field = getattr(obj, self.lookup_field)
kwargs = {self.lookup_field: lookup_field}
return reverse(view_name, kwargs=kwargs, request=request, format=format)
def get_object(self, queryset, view_name, view_args, view_kwargs):
"""
Return the object corresponding to a matched URL.
Takes the matched URL conf arguments, and the queryset, and should
return an object instance, or raise an `ObjectDoesNotExist` exception.
"""
lookup_value = view_kwargs[self.lookup_field]
filter_kwargs = {self.lookup_field: lookup_value}
return queryset.get(**filter_kwargs)
def to_native(self, obj):
view_name = self.view_name
request = self.context.get('request', None)
format = self.format or self.context.get('format', None)
assert request is not None, (
"`HyperlinkedRelatedField` requires the request in the serializer "
"context. Add `context={'request': request}` when instantiating "
"the serializer."
)
# If the object has not yet been saved then we cannot hyperlink to it.
if getattr(obj, 'pk', None) is None:
return
# Return the hyperlink, or error if incorrectly configured.
try:
return self.get_url(obj, view_name, request, format)
except NoReverseMatch:
msg = (
'Could not resolve URL for hyperlinked relationship using '
'view name "%s". You may have failed to include the related '
'model in your API, or incorrectly configured the '
'`lookup_field` attribute on this field.'
)
raise Exception(msg % view_name)
def from_native(self, value):
# Convert URL -> model instance pk
# TODO: Use values_list
queryset = self.queryset
if queryset is None:
raise Exception('Writable related fields must include a `queryset` argument')
try:
http_prefix = value.startswith(('http:', 'https:'))
except AttributeError:
msg = self.error_messages['incorrect_type']
raise ValidationError(msg % type(value).__name__)
if http_prefix:
# If needed convert absolute URLs to relative path
value = urlparse.urlparse(value).path
prefix = get_script_prefix()
if value.startswith(prefix):
value = '/' + value[len(prefix):]
try:
match = resolve(value)
except Exception:
raise ValidationError(self.error_messages['no_match'])
if match.view_name != self.view_name:
raise ValidationError(self.error_messages['incorrect_match'])
try:
return self.get_object(queryset, match.view_name,
match.args, match.kwargs)
except (ObjectDoesNotExist, TypeError, ValueError):
raise ValidationError(self.error_messages['does_not_exist'])
class HyperlinkedIdentityField(Field):
"""
Represents the instance, or a property on the instance, using hyperlinking.
"""
lookup_field = 'pk'
read_only = True
def __init__(self, *args, **kwargs):
try:
self.view_name = kwargs.pop('view_name')
except KeyError:
msg = "HyperlinkedIdentityField requires 'view_name' argument"
raise ValueError(msg)
self.format = kwargs.pop('format', None)
lookup_field = kwargs.pop('lookup_field', None)
self.lookup_field = lookup_field or self.lookup_field
super(HyperlinkedIdentityField, self).__init__(*args, **kwargs)
def field_to_native(self, obj, field_name):
request = self.context.get('request', None)
format = self.context.get('format', None)
view_name = self.view_name
assert request is not None, (
"`HyperlinkedIdentityField` requires the request in the serializer"
" context. Add `context={'request': request}` when instantiating "
"the serializer."
)
# By default use whatever format is given for the current context
# unless the target is a different type to the source.
#
# Eg. Consider a HyperlinkedIdentityField pointing from a json
# representation to an html property of that representation...
#
# '/snippets/1/' should link to '/snippets/1/highlight/'
# ...but...
# '/snippets/1/.json' should link to '/snippets/1/highlight/.html'
if format and self.format and self.format != format:
format = self.format
# Return the hyperlink, or error if incorrectly configured.
try:
return self.get_url(obj, view_name, request, format)
except NoReverseMatch:
msg = (
'Could not resolve URL for hyperlinked relationship using '
'view name "%s". You may have failed to include the related '
'model in your API, or incorrectly configured the '
'`lookup_field` attribute on this field.'
)
raise Exception(msg % view_name)
def get_url(self, obj, view_name, request, format):
"""
Given an object, return the URL that hyperlinks to the object.
May raise a `NoReverseMatch` if the `view_name` and `lookup_field`
attributes are not configured to correctly match the URL conf.
"""
lookup_field = getattr(obj, self.lookup_field, None)
kwargs = {self.lookup_field: lookup_field}
# Handle unsaved object case
if lookup_field is None:
return None
return reverse(view_name, kwargs=kwargs, request=request, format=format)

View File

@ -458,7 +458,7 @@ class BrowsableAPIRenderer(BaseRenderer):
):
return
serializer = view.get_serializer(instance=obj, data=data, files=files)
serializer = view.get_serializer(instance=obj, data=data)
serializer.is_valid()
data = serializer.data
@ -579,10 +579,10 @@ class BrowsableAPIRenderer(BaseRenderer):
'available_formats': [renderer_cls.format for renderer_cls in view.renderer_classes],
'response_headers': response_headers,
'put_form': self.get_rendered_html_form(view, 'PUT', request),
'post_form': self.get_rendered_html_form(view, 'POST', request),
'delete_form': self.get_rendered_html_form(view, 'DELETE', request),
'options_form': self.get_rendered_html_form(view, 'OPTIONS', request),
#'put_form': self.get_rendered_html_form(view, 'PUT', request),
#'post_form': self.get_rendered_html_form(view, 'POST', 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': raw_data_post_form,

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@ -7,7 +7,7 @@ from django.db.models.query import QuerySet
from django.utils.datastructures import SortedDict
from django.utils.functional import Promise
from rest_framework.compat import force_text
from rest_framework.serializers import DictWithMetadata, SortedDictWithMetadata
# from rest_framework.serializers import DictWithMetadata, SortedDictWithMetadata
import datetime
import decimal
import types
@ -106,14 +106,14 @@ else:
SortedDict,
yaml.representer.SafeRepresenter.represent_dict
)
SafeDumper.add_representer(
DictWithMetadata,
yaml.representer.SafeRepresenter.represent_dict
)
SafeDumper.add_representer(
SortedDictWithMetadata,
yaml.representer.SafeRepresenter.represent_dict
)
# SafeDumper.add_representer(
# DictWithMetadata,
# yaml.representer.SafeRepresenter.represent_dict
# )
# SafeDumper.add_representer(
# SortedDictWithMetadata,
# yaml.representer.SafeRepresenter.represent_dict
# )
SafeDumper.add_representer(
types.GeneratorType,
yaml.representer.SafeRepresenter.represent_list

View File

@ -0,0 +1,86 @@
"""
Helpers for dealing with HTML input.
"""
def is_html_input(dictionary):
# MultiDict type datastructures are used to represent HTML form input,
# which may have more than one value for each key.
return hasattr(dictionary, 'getlist')
def parse_html_list(dictionary, prefix=''):
"""
Used to suport list values in HTML forms.
Supports lists of primitives and/or dictionaries.
* List of primitives.
{
'[0]': 'abc',
'[1]': 'def',
'[2]': 'hij'
}
-->
[
'abc',
'def',
'hij'
]
* List of dictionaries.
{
'[0]foo': 'abc',
'[0]bar': 'def',
'[1]foo': 'hij',
'[2]bar': 'klm',
}
-->
[
{'foo': 'abc', 'bar': 'def'},
{'foo': 'hij', 'bar': 'klm'}
]
"""
Dict = type(dictionary)
ret = {}
regex = re.compile(r'^%s\[([0-9]+)\](.*)$' % re.escape(prefix))
for field, value in dictionary.items():
match = regex.match(field)
if not match:
continue
index, key = match.groups()
index = int(index)
if not key:
ret[index] = value
elif isinstance(ret.get(index), dict):
ret[index][key] = value
else:
ret[index] = Dict({key: value})
return [ret[item] for item in sorted(ret.keys())]
def parse_html_dict(dictionary, prefix):
"""
Used to support dictionary values in HTML forms.
{
'profile.username': 'example',
'profile.email': 'example@example.com',
}
-->
{
'profile': {
'username': 'example,
'email': 'example@example.com'
}
}
"""
ret = {}
regex = re.compile(r'^%s\.(.+)$' % re.escape(prefix))
for field, value in dictionary.items():
match = regex.match(field)
if not match:
continue
key = match.groups()[0]
ret[key] = value
return ret