Coverage for rest_framework/relations: 76%

From f2e6af89755c34083acb1a5fcd843a480037293f Mon Sep 17 00:00:00 2001 From: Tom Christie Date: Fri, 21 Jun 2013 22:04:38 +0100 Subject: Remove erronous htmlcov files --- htmlcov/rest_framework_relations.html | 1347 --------------------------------- 1 file changed, 1347 deletions(-) delete mode 100644 htmlcov/rest_framework_relations.html (limited to 'htmlcov/rest_framework_relations.html') diff --git a/htmlcov/rest_framework_relations.html b/htmlcov/rest_framework_relations.html deleted file mode 100644 index 29ad3cf6..00000000 --- a/htmlcov/rest_framework_relations.html +++ /dev/null @@ -1,1347 +0,0 @@ - - - - - - - - Coverage for rest_framework/relations: 76% - - - - - - - - - - - -

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"""

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Serializer fields that deal with relationships.

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-

These fields allow you to specify the style that should be used to represent

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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

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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 _

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from rest_framework.fields import Field, WritableField, get_component, is_simple_callable

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from rest_framework.reverse import reverse

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from rest_framework.compat import urlparse

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from rest_framework.compat import smart_text

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import warnings

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-

-

##### 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

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many_widget = widgets.SelectMultiple

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form_field_class = forms.ChoiceField

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many_form_field_class = forms.MultipleChoiceField

-

-

cache_choices = False

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empty_label = None

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read_only = True

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many = False

-

-

def __init__(self, *args, **kwargs):

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-

# 'null' is to be deprecated in favor of 'required'

-

if 'null' in kwargs:

-

warnings.warn('The `null` keyword argument is deprecated. '

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'Use the `required` keyword argument instead.',

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DeprecationWarning, stacklevel=2)

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kwargs['required'] = not kwargs.pop('null')

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-

queryset = kwargs.pop('queryset', None)

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self.many = kwargs.pop('many', self.many)

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if self.many:

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self.widget = self.many_widget

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self.form_field_class = self.many_form_field_class

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-

kwargs['read_only'] = kwargs.pop('read_only', self.read_only)

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super(RelatedField, self).__init__(*args, **kwargs)

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-

if not self.required:

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self.empty_label = BLANK_CHOICE_DASH[0][1]

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-

self.queryset = queryset

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-

def initialize(self, parent, field_name):

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super(RelatedField, self).initialize(parent, field_name)

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if self.queryset is None and not self.read_only:

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try:

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manager = getattr(self.parent.opts.model, self.source or field_name)

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if hasattr(manager, 'related'): # Forward

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self.queryset = manager.related.model._default_manager.all()

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else: # Reverse

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self.queryset = manager.field.rel.to._default_manager.all()

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except Exception:

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msg = ('Serializer related fields must include a `queryset`' +

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' argument or set `read_only=True')

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raise Exception(msg)

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-

### We need this stuff to make form choices work...

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def prepare_value(self, obj):

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return self.to_native(obj)

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-

def label_from_instance(self, obj):

-

"""

-

Return a readable representation for use with eg. select widgets.

-

"""

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desc = smart_text(obj)

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ident = smart_text(self.to_native(obj))

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if desc == ident:

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return desc

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return "%s - %s" % (desc, ident)

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-

def _get_queryset(self):

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return self._queryset

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-

def _set_queryset(self, queryset):

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self._queryset = queryset

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self.widget.choices = self.choices

-

-

queryset = property(_get_queryset, _set_queryset)

-

-

def _get_choices(self):

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# If self._choices is set, then somebody must have manually set

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# the property self.choices. In this case, just return self._choices.

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if hasattr(self, '_choices'):

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return self._choices

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-

# Otherwise, execute the QuerySet in self.queryset to determine the

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# choices dynamically. Return a fresh ModelChoiceIterator that has not been

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# consumed. Note that we're instantiating a new ModelChoiceIterator *each*

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# time _get_choices() is called (and, thus, each time self.choices is

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# accessed) so that we can ensure the QuerySet has not been consumed. This

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# construct might look complicated but it allows for lazy evaluation of

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# 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)

-

-

### 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

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value = obj

-

-

for component in source.split('.'):

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value = get_component(value, component)

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if value is None:

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break

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except ObjectDoesNotExist:

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return None

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-

if value is None:

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return None

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-

if self.many:

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if is_simple_callable(getattr(value, 'all', None)):

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return [self.to_native(item) for item in value.all()]

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else:

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# Also support non-queryset iterables.

-

# This allows us to also support plain lists of related items.

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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:

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return

-

-

try:

-

if self.many:

-

try:

-

# Form data

-

value = data.getlist(field_name)

-

if value == [''] or value == []:

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raise KeyError

-

except AttributeError:

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# Non-form data

-

value = data[field_name]

-

else:

-

value = data[field_name]

-

except KeyError:

-

if self.partial:

-

return

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value = [] if self.many else None

-

-

if value in (None, '') and self.required:

-

raise ValidationError(self.error_messages['required'])

-

elif value in (None, ''):

-

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('.'):

-

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:

-

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.'),

-

}

-

-

# These are all pending deprecation

-

pk_url_kwarg = 'pk'

-

slug_field = 'slug'

-

slug_url_kwarg = None # Defaults to same as `slug_field` unless overridden

-

-

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)

-

-

# These are pending deprecation

-

if 'pk_url_kwarg' in kwargs:

-

msg = 'pk_url_kwarg is pending deprecation. Use lookup_field instead.'

-

warnings.warn(msg, PendingDeprecationWarning, stacklevel=2)

-

if 'slug_url_kwarg' in kwargs:

-

msg = 'slug_url_kwarg is pending deprecation. Use lookup_field instead.'

-

warnings.warn(msg, PendingDeprecationWarning, stacklevel=2)

-

if 'slug_field' in kwargs:

-

msg = 'slug_field is pending deprecation. Use lookup_field instead.'

-

warnings.warn(msg, PendingDeprecationWarning, stacklevel=2)

-

-

self.pk_url_kwarg = kwargs.pop('pk_url_kwarg', self.pk_url_kwarg)

-

self.slug_field = kwargs.pop('slug_field', self.slug_field)

-

default_slug_kwarg = self.slug_url_kwarg or self.slug_field

-

self.slug_url_kwarg = kwargs.pop('slug_url_kwarg', default_slug_kwarg)

-

-

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}

-

try:

-

return reverse(view_name, kwargs=kwargs, request=request, format=format)

-

except NoReverseMatch:

-

pass

-

-

if self.pk_url_kwarg != 'pk':

-

# Only try pk if it has been explicitly set.

-

# Otherwise, the default `lookup_field = 'pk'` has us covered.

-

pk = obj.pk

-

kwargs = {self.pk_url_kwarg: pk}

-

try:

-

return reverse(view_name, kwargs=kwargs, request=request, format=format)

-

except NoReverseMatch:

-

pass

-

-

slug = getattr(obj, self.slug_field, None)

-

if slug is not None:

-

# Only try slug if it corresponds to an attribute on the object.

-

kwargs = {self.slug_url_kwarg: slug}

-

try:

-

ret = reverse(view_name, kwargs=kwargs, request=request, format=format)

-

if self.slug_field == 'slug' and self.slug_url_kwarg == 'slug':

-

# If the lookup succeeds using the default slug params,

-

# then `slug_field` is being used implicitly, and we

-

# we need to warn about the pending deprecation.

-

msg = 'Implicit slug field hyperlinked fields are pending deprecation.' \

-

'You should set `lookup_field=slug` on the HyperlinkedRelatedField.'

-

warnings.warn(msg, PendingDeprecationWarning, stacklevel=2)

-

return ret

-

except NoReverseMatch:

-

pass

-

-

raise NoReverseMatch()

-

-

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 = view_kwargs.get(self.lookup_field, None)

-

pk = view_kwargs.get(self.pk_url_kwarg, None)

-

slug = view_kwargs.get(self.slug_url_kwarg, None)

-

-

if lookup is not None:

-

filter_kwargs = {self.lookup_field: lookup}

-

elif pk is not None:

-

filter_kwargs = {'pk': pk}

-

elif slug is not None:

-

filter_kwargs = {self.slug_field: slug}

-

else:

-

raise ObjectDoesNotExist()

-

-

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)

-

-

if request is None:

-

msg = (

-

"Using `HyperlinkedRelatedField` without including the request "

-

"in the serializer context is deprecated. "

-

"Add `context={'request': request}` when instantiating "

-

"the serializer."

-

)

-

warnings.warn(msg, DeprecationWarning, stacklevel=4)

-

-

# 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

-

-

# These are all pending deprecation

-

pk_url_kwarg = 'pk'

-

slug_field = 'slug'

-

slug_url_kwarg = None # Defaults to same as `slug_field` unless overridden

-

-

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

-

-

# These are pending deprecation

-

if 'pk_url_kwarg' in kwargs:

-

msg = 'pk_url_kwarg is pending deprecation. Use lookup_field instead.'

-

warnings.warn(msg, PendingDeprecationWarning, stacklevel=2)

-

if 'slug_url_kwarg' in kwargs:

-

msg = 'slug_url_kwarg is pending deprecation. Use lookup_field instead.'

-

warnings.warn(msg, PendingDeprecationWarning, stacklevel=2)

-

if 'slug_field' in kwargs:

-

msg = 'slug_field is pending deprecation. Use lookup_field instead.'

-

warnings.warn(msg, PendingDeprecationWarning, stacklevel=2)

-

-

self.slug_field = kwargs.pop('slug_field', self.slug_field)

-

default_slug_kwarg = self.slug_url_kwarg or self.slug_field

-

self.pk_url_kwarg = kwargs.pop('pk_url_kwarg', self.pk_url_kwarg)

-

self.slug_url_kwarg = kwargs.pop('slug_url_kwarg', default_slug_kwarg)

-

-

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

-

-

if request is None:

-

warnings.warn("Using `HyperlinkedIdentityField` without including the "

-

"request in the serializer context is deprecated. "

-

"Add `context={'request': request}` when instantiating the serializer.",

-

DeprecationWarning, stacklevel=4)

-

-

# 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)

-

kwargs = {self.lookup_field: lookup_field}

-

try:

-

return reverse(view_name, kwargs=kwargs, request=request, format=format)

-

except NoReverseMatch:

-

pass

-

-

if self.pk_url_kwarg != 'pk':

-

# Only try pk lookup if it has been explicitly set.

-

# Otherwise, the default `lookup_field = 'pk'` has us covered.

-

kwargs = {self.pk_url_kwarg: obj.pk}

-

try:

-

return reverse(view_name, kwargs=kwargs, request=request, format=format)

-

except NoReverseMatch:

-

pass

-

-

slug = getattr(obj, self.slug_field, None)

-

if slug:

-

# Only use slug lookup if a slug field exists on the model

-

kwargs = {self.slug_url_kwarg: slug}

-

try:

-

return reverse(view_name, kwargs=kwargs, request=request, format=format)

-

except NoReverseMatch:

-

pass

-

-

raise NoReverseMatch()

-

-

-

### Old-style many classes for backwards compat

-

-

class ManyRelatedField(RelatedField):

-

def __init__(self, *args, **kwargs):

-

warnings.warn('`ManyRelatedField()` is deprecated. '

-

'Use `RelatedField(many=True)` instead.',

-

DeprecationWarning, stacklevel=2)

-

kwargs['many'] = True

-

super(ManyRelatedField, self).__init__(*args, **kwargs)

-

-

-

class ManyPrimaryKeyRelatedField(PrimaryKeyRelatedField):

-

def __init__(self, *args, **kwargs):

-

warnings.warn('`ManyPrimaryKeyRelatedField()` is deprecated. '

-

'Use `PrimaryKeyRelatedField(many=True)` instead.',

-

DeprecationWarning, stacklevel=2)

-

kwargs['many'] = True

-

super(ManyPrimaryKeyRelatedField, self).__init__(*args, **kwargs)

-

-

-

class ManySlugRelatedField(SlugRelatedField):

-

def __init__(self, *args, **kwargs):

-

warnings.warn('`ManySlugRelatedField()` is deprecated. '

-

'Use `SlugRelatedField(many=True)` instead.',

-

DeprecationWarning, stacklevel=2)

-

kwargs['many'] = True

-

super(ManySlugRelatedField, self).__init__(*args, **kwargs)

-

-

-

class ManyHyperlinkedRelatedField(HyperlinkedRelatedField):

-

def __init__(self, *args, **kwargs):

-

warnings.warn('`ManyHyperlinkedRelatedField()` is deprecated. '

-

'Use `HyperlinkedRelatedField(many=True)` instead.',

-

DeprecationWarning, stacklevel=2)

-

kwargs['many'] = True

-

super(ManyHyperlinkedRelatedField, self).__init__(*args, **kwargs)

- -

-

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