def dispatch(self, request_type, request, **kwargs):
     # Using `Webapp.objects.all()` here forces a new queryset, which for
     # now avoids bug 854505. We're also using this to filter by flagged
     # apps.
     self._meta.queryset_base = Webapp.objects.all()
     self._meta.queryset = self._meta.queryset_base.exclude(
         id__in=Webapp.get_excluded_in(REGIONS_DICT[get_region()]))
     return super(AppResource, self).dispatch(request_type, request,
                                              **kwargs)

def _filter_search(request, qs, query, filters=None, sorting=None,
                   sorting_default='-popularity', region=None):
    """Filter an ES queryset based on a list of filters."""
    # Intersection of the form fields present and the filters we want to apply.
    filters = filters or DEFAULT_FILTERS
    sorting = sorting or DEFAULT_SORTING
    show = filter(query.get, filters)

    if query.get('q'):
        qs = qs.query(should=True, **name_query(query['q'].lower()))
    if 'cat' in show:
        qs = qs.filter(category=query['cat'])
    if 'price' in show:
        if query['price'] == 'paid':
            qs = qs.filter(premium_type__in=amo.ADDON_PREMIUMS)
        elif query['price'] == 'free':
            qs = qs.filter(premium_type__in=amo.ADDON_FREES, price=0)
    if 'device' in show:
        qs = qs.filter(device=forms.DEVICE_CHOICES_IDS[query['device']])
    if 'premium_types' in show:
        if query.get('premium_types'):
            qs = qs.filter(premium_type__in=query.get('premium_types'))
    if 'app_type' in query and query['app_type']:
        qs = qs.filter(app_type=query['app_type'])
    if 'sort' in show:
        sort_by = None
        if query['sort'] in sorting:
            sort_by = sorting[query['sort']]

        # For "Adolescent" regions popularity is global installs + reviews.

        if query['sort'] == 'popularity' and region and not region.adolescent:
            # For "Mature" regions popularity becomes installs + reviews
            # from only that region.
            sort_by = '-popularity_%s' % region.id

        if sort_by:
            qs = qs.order_by(sort_by)
    elif not query.get('q'):

        if (sorting_default == 'popularity' and region and
            not region.adolescent):
            # For "Mature" regions popularity becomes installs + reviews
            # from only that region.
            sorting_default = '-popularity_%s' % region.id

        # Sort by a default if there was no query so results are predictable.
        qs = qs.order_by(sorting_default)

    region = regions.REGIONS_DICT[get_region()]
    # If the region only supports carrier billing for app purchase,
    # don't list apps that require carrier billing to buy.
    if not region.supports_carrier_billing:
        qs = qs.filter(carrier_billing_only=False)
    return qs

 def get_app(self, ident):
     try:
         app = Webapp.objects.valid().get(id=ident)
     except (Webapp.DoesNotExist, ValueError):
         try:
             app = Webapp.objects.valid().get(app_slug=ident)
         except Webapp.DoesNotExist:
             raise self.non_form_errors([('app', 'Invalid app')])
     if not app.listed_in(region=REGIONS_DICT[get_region()]):
         raise self.non_form_errors([('app', 'Not available in this region')])
     return app

 def get_app_from_value(cls, value):
     try:
         app = Webapp.objects.valid().get(id=value)
     except (Webapp.DoesNotExist, ValueError):
         try:
             app = Webapp.objects.valid().get(app_slug=value)
         except Webapp.DoesNotExist:
             raise serializers.ValidationError('Invalid app')
     if not app.listed_in(region=REGIONS_DICT[get_region()]):
         raise serializers.ValidationError(
             'App not available in this region')
     return app

    def validate(self, attrs):
        if not getattr(self, 'object'):
            # If we are creating a rating, then we need to do various checks on
            # the app. Because these checks need the version as well, we have
            # to do them here and not in validate_app().

            # Assign user and ip_address. It won't change once the review is
            # created.
            user = self.request.user
            attrs['user'] = user
            attrs['ip_address'] = self.request.META.get('REMOTE_ADDR', '')
            guessed_lang = guess_language(attrs['body'])
            if guessed_lang is None:
                attrs['lang'] = user.lang
            else:
                attrs['lang'] = guessed_lang

            # If the app is packaged, add in the current version.
            if attrs['addon'].is_packaged:
                attrs['version'] = attrs['addon'].current_version

            # Return 409 if the user has already reviewed this app.
            app = attrs['addon']
            qs = self.context['view'].queryset.filter(addon=app, user=user)
            if app.is_packaged:
                qs = qs.filter(version=attrs['version'])
            if qs.exists():
                raise Conflict('You have already reviewed this app.')

            # Return 403 is the app is not public.
            if not app.is_public():
                raise PermissionDenied('The app requested is not public.')

            # Return 403 if the user is attempting to review their own app.
            if app.has_author(user):
                raise PermissionDenied('You may not review your own app.')

            # Return 403 if not a free app and the user hasn't purchased it.
            if app.is_premium() and not app.is_purchased(user):
                raise PermissionDenied("You may not review paid apps you "
                                       "haven't purchased.")

            # Return 403 if the app is not available in the current region.
            current_region = get_region()
            if not app.listed_in(region=current_region):
                raise PermissionDenied('App not available in region "%s".' %
                                       current_region.slug)

        return attrs

 def get_app(self, ident):
     try:
         app = Webapp.objects.by_identifier(ident)
     except Webapp.DoesNotExist:
         raise Http404
     current_region = get_region()
     if ((not app.is_public()
          or not app.listed_in(region=current_region))
          and not check_addon_ownership(self.request, app)):
         # App owners and admin can see the app even if it's not public
         # or not available in the current region. Regular users or
         # anonymous users can't.
         raise PermissionDenied('The app requested is not public or not '
             'available in region "%s".' % current_region.slug)
     return app

def test_get_region_not_empty(local):
    local.region = 'us'

    eq_(get_region(), regions.US)

def test_set_region_object():
    set_region(regions.USA)
    eq_(get_region(), regions.USA)
    set_region(regions.ESP)
    eq_(get_region(), regions.ESP)

def es_app_to_dict(obj, profile=None, request=None):
    """
    Return app data as dict for API where `app` is the elasticsearch result.
    """
    # Circular import.
    from mkt.developers.models import AddonPaymentAccount
    from mkt.webapps.models import Installed, Webapp

    translation_fields = ('banner_message', 'description', 'homepage', 'name',
                          'release_notes', 'support_email', 'support_url')
    lang = None
    if request and request.method == 'GET' and 'lang' in request.GET:
        lang = request.GET.get('lang', '').lower()

    region_slug = None
    region_id = None
    if request and request.method == 'GET' and 'region' in request.GET:
        region_slug = request.GET.get('region', '').lower()
    if region_slug not in REGIONS_DICT:
        region_slug = get_region()
    region_id = REGIONS_DICT[region_slug].id

    src = obj._source
    is_packaged = src.get('app_type') != amo.ADDON_WEBAPP_HOSTED
    # The following doesn't perform a database query, but gives us useful
    # methods like `get_detail_url` and `get_icon_url`. If you use `app` make
    # sure the calls don't query the database.
    app = Webapp(id=obj._id, app_slug=obj.app_slug, is_packaged=is_packaged,
                 type=amo.ADDON_WEBAPP, icon_type='image/png',
                 modified=getattr(obj, 'modified', None))

    attrs = ('created', 'current_version', 'default_locale', 'is_offline',
             'manifest_url', 'reviewed', 'ratings', 'status',
             'weekly_downloads')
    data = dict((a, getattr(obj, a, None)) for a in attrs)

    # Flatten the localized fields from {'lang': ..., 'string': ...}
    # to {lang: string}.
    for field in translation_fields:
        src_field = '%s_translations' % field
        value_field = src.get(src_field)
        src[src_field] = dict((v.get('lang', ''), v.get('string', ''))
                              for v in value_field) if value_field else {}
        data[field] = get_translations(src, src_field, obj.default_locale,
                                       lang)

    # Generate urls for previews and icons before the data.update() call below
    # adds them to the result.
    previews = getattr(obj, 'previews', [])
    for preview in previews:
        if 'image_url' and 'thumbnail_url' in preview:
            # Old-style index, the full URL is already present, nothing to do.
            # TODO: remove this check once we have re-indexed everything.
            continue
        else:
            # New-style index, we need to build the URLs from the data we have.
            p = Preview(id=preview.pop('id'), modified=preview.pop('modified'),
                        filetype=preview['filetype'])
            preview['image_url'] = p.image_url
            preview['thumbnail_url'] = p.thumbnail_url
    icons = getattr(obj, 'icons', [])
    for icon in icons:
        if 'url' in icon:
            # Old-style index, the full URL is already present, nothing to do.
            # TODO: remove this check once we have re-indexed everything.
            continue
        else:
            # New-style index, we need to build the URLs from the data we have.
            icon['url'] = app.get_icon_url(icon['size'])

    data.update({
        'absolute_url': absolutify(app.get_detail_url()),
        'app_type': 'packaged' if is_packaged else 'hosted',
        'author': src.get('author', ''),
        'banner_regions': src.get('banner_regions', []),
        'categories': [c for c in obj.category],
        'content_ratings': filter_content_ratings_by_region({
            'ratings': dehydrate_content_ratings(
                getattr(obj, 'content_ratings', {})),
            'descriptors': dehydrate_descriptors(
                getattr(obj, 'content_descriptors', {})),
            'interactive_elements': dehydrate_interactives(
                getattr(obj, 'interactive_elements', [])),
            'regions': mkt.regions.REGION_TO_RATINGS_BODY()
        }, region=region_slug),
        'device_types': [DEVICE_TYPES[d].api_name for d in src.get('device')],
        'icons': dict((i['size'], i['url']) for i in src.get('icons')),
        'id': long(obj._id),
        'is_packaged': is_packaged,
        'payment_required': False,
        'premium_type': amo.ADDON_PREMIUM_API[src.get('premium_type')],
        'previews': previews,
        'privacy_policy': reverse('app-privacy-policy-detail',
                                  kwargs={'pk': obj._id}),
        'public_stats': obj.has_public_stats,
        'supported_locales': src.get('supported_locales', ''),
        'slug': obj.app_slug,
        'versions': dict((v.get('version'), v.get('resource_uri')) for v in
                         src.get('versions')),
    })
#.........这里部分代码省略.........

def test_get_region_empty():
    eq_(get_region(), regions.RESTOFWORLD)

def test_set_region_bad_slug():
    set_region('foo')
    eq_(get_region(), regions.RESTOFWORLD)

def test_set_region_object():
    set_region(regions.US)
    eq_(get_region(), regions.US)
    set_region(regions.SPAIN)
    eq_(get_region(), regions.SPAIN)

def test_set_region(local):
    local.region = 'us'

    eq_(get_region(), regions.USA)
    set_region('es')
    eq_(get_region(), regions.ESP)

def test_get_region_empty():
    eq_(get_region(), regions.WORLDWIDE.slug)
    eq_(get_region_id(), regions.WORLDWIDE.id)

 def get_queryset(self):
     return Webapp.objects.all().exclude(
         id__in=get_excluded_in(REGIONS_DICT[get_region()].id))

def test_set_region(local):
    local.region = 'us'

    eq_(get_region(), 'us')
    set_region('es')
    eq_(get_region(), 'es')

def test_get_region_empty():
    eq_(get_region(), regions.RESTOFWORLD.slug)
    eq_(get_region_id(), regions.RESTOFWORLD.id)

def test_get_region_worldwide(local):
    local.region = 'worldwide'
    eq_(get_region(), regions.RESTOFWORLD)

def test_set_region(local):
    local.region = 'us'

    eq_(get_region(), regions.US)
    set_region('es')
    eq_(get_region(), regions.SPAIN)

 def get_queryset(self):
     return Webapp.objects.all().exclude(id__in=get_excluded_in(get_region().id))