We are currently solving the following issue within our repository. Here is the issue text:
--- BEGIN ISSUE ---
Permissions endpoint does not expose perms specified in settings
Ex:
- Set `kinto.bucket_write_principals = system.Authenticated`
- `GET /permissions` should mention every buckets

Related #892 #350 
Permissions endpoint does not expose perms specified in settings
Ex:
- Set `kinto.bucket_write_principals = system.Authenticated`
- `GET /permissions` should mention every buckets

Related #892 #350 

--- END ISSUE ---

Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
--- BEGIN FILES ---
Path: `kinto/views/permissions.py`
Content:
```
1 import colander
2 from pyramid.security import NO_PERMISSION_REQUIRED, Authenticated
3 
4 from kinto.authorization import PERMISSIONS_INHERITANCE_TREE
5 from kinto.core import utils as core_utils, resource
6 from kinto.core.storage.memory import extract_record_set
7 
8 
9 class PermissionsModel(object):
10     id_field = 'id'
11     modified_field = 'last_modified'
12     deleted_field = 'deleted'
13 
14     def __init__(self, request):
15         self.request = request
16 
17     def get_records(self, filters=None, sorting=None, pagination_rules=None,
18                     limit=None, include_deleted=False, parent_id=None):
19         # Invert the permissions inheritance tree.
20         perms_descending_tree = {}
21         for on_resource, tree in PERMISSIONS_INHERITANCE_TREE.items():
22             for obtained_perm, obtained_from in tree.items():
23                 for from_resource, perms in obtained_from.items():
24                     for perm in perms:
25                         perms_descending_tree.setdefault(from_resource, {})\
26                                              .setdefault(perm, {})\
27                                              .setdefault(on_resource, set())\
28                                              .add(obtained_perm)
29 
30         # Obtain current principals.
31         principals = self.request.effective_principals
32         if Authenticated in principals:
33             # Since this view does not require any permission (can be used to
34             # obtain public users permissions), we have to add the prefixed
35             # userid among the principals
36             # (see :mod:`kinto.core.authentication`)
37             userid = self.request.prefixed_userid
38             principals.append(userid)
39 
40         # Query every possible permission of the current user from backend.
41         backend = self.request.registry.permission
42         perms_by_object_uri = backend.get_accessible_objects(principals)
43 
44         entries = []
45         for object_uri, perms in perms_by_object_uri.items():
46             try:
47                 # Obtain associated resource from object URI
48                 resource_name, matchdict = core_utils.view_lookup(self.request,
49                                                                   object_uri)
50             except ValueError:
51                 # Skip permissions entries that are not linked to an object URI
52                 continue
53 
54             # For consistency with event payloads, prefix id with resource name
55             matchdict[resource_name + '_id'] = matchdict.get('id')
56 
57             # Expand implicit permissions using descending tree.
58             permissions = set(perms)
59             for perm in perms:
60                 obtained = perms_descending_tree[resource_name][perm]
61                 # Related to same resource only and not every sub-objects.
62                 # (e.g "bucket:write" gives "bucket:read" but not "group:read")
63                 permissions |= obtained[resource_name]
64 
65             entry = dict(uri=object_uri,
66                          resource_name=resource_name,
67                          permissions=list(permissions),
68                          **matchdict)
69             entries.append(entry)
70 
71         return extract_record_set(entries, filters=filters, sorting=sorting,
72                                   pagination_rules=pagination_rules,
73                                   limit=limit)
74 
75 
76 class PermissionsSchema(resource.ResourceSchema):
77     uri = colander.SchemaNode(colander.String())
78     resource_name = colander.SchemaNode(colander.String())
79     permissions = colander.Sequence(colander.SchemaNode(colander.String()))
80     bucket_id = colander.SchemaNode(colander.String())
81     collection_id = colander.SchemaNode(colander.String(),
82                                         missing=colander.drop)
83     group_id = colander.SchemaNode(colander.String(),
84                                    missing=colander.drop)
85     record_id = colander.SchemaNode(colander.String(),
86                                     missing=colander.drop)
87 
88     class Options:
89         preserve_unknown = False
90 
91 
92 @resource.register(name='permissions',
93                    description='List of user permissions',
94                    collection_path='/permissions',
95                    record_path=None,
96                    collection_methods=('GET',),
97                    permission=NO_PERMISSION_REQUIRED)
98 class Permissions(resource.ShareableResource):
99 
100     schema = PermissionsSchema
101 
102     def __init__(self, request, context=None):
103         super(Permissions, self).__init__(request, context)
104         self.model = PermissionsModel(request)
105 
106     def _extract_sorting(self, limit):
107         # Permissions entries are not stored with timestamp, so do not
108         # force it.
109         result = super(Permissions, self)._extract_sorting(limit)
110         without_last_modified = [s for s in result
111                                  if s.field != self.model.modified_field]
112         return without_last_modified
113 
114     def _extract_filters(self, queryparams=None):
115         result = super(Permissions, self)._extract_filters(queryparams)
116         without_last_modified = [s for s in result
117                                  if s.field != self.model.modified_field]
118         return without_last_modified
119
```
--- END FILES ---

Please first localize the bug based on the issue statement, and then generate a patch according to the `git diff` format fenced by three backticks.

Here is an example:

```diff
diff --git a/examples/server_async.py b/examples/server_async.py
--- a/examples/server_async.py
+++ b/examples/server_async.py
@@ -313,4 +313,4 @@
 
 
 if __name__ == "__main__":
-    asyncio.run(run_async_server("."), debug=True)
+    asyncio.run(run_async_server(), debug=True)
diff --git a/examples/server_sync.py b/examples/server_sync.py
--- a/examples/server_sync.py
+++ b/examples/server_sync.py
@@ -313,5 +313,5 @@
 
 
 if __name__ == "__main__":
-    server = run_sync_server(".")
+    server = run_sync_server()
     server.shutdown()

```

diff --git a/kinto/views/permissions.py b/kinto/views/permissions.py
--- a/kinto/views/permissions.py
+++ b/kinto/views/permissions.py
@@ -1,11 +1,51 @@
 import colander
 from pyramid.security import NO_PERMISSION_REQUIRED, Authenticated
+from pyramid.settings import aslist
 
 from kinto.authorization import PERMISSIONS_INHERITANCE_TREE
 from kinto.core import utils as core_utils, resource
 from kinto.core.storage.memory import extract_record_set
 
 
+def allowed_from_settings(settings, principals):
+    """Returns every permissions allowed from settings for the current user.
+    :param settings dict: app settings
+    :param principals list: list of principals of current user
+    :rtype: dict
+
+    Result example::
+
+        {
+            "bucket": {"write", "collection:create"},
+            "collection": {"read"}
+        }
+
+    XXX: This helper will be useful for Kinto/kinto#894
+    """
+    perms_settings = {k: aslist(v) for k, v in settings.items()
+                      if k.endswith('_principals')}
+    from_settings = {}
+    for key, allowed_principals in perms_settings.items():
+        resource_name, permission, _ = key.split('_')
+        # Keep the known permissions only.
+        if resource_name not in PERMISSIONS_INHERITANCE_TREE.keys():
+            continue
+        # Keep the permissions of the current user only.
+        if not bool(set(principals) & set(allowed_principals)):
+            continue
+        # ``collection_create_principals`` means ``collection:create`` in bucket.
+        if permission == 'create':
+            permission = '%s:%s' % (resource_name, permission)
+            resource_name = {  # resource parents.
+                'bucket': '',
+                'collection': 'bucket',
+                'group': 'bucket',
+                'record': 'collection'}[resource_name]
+        # Store them in a convenient way.
+        from_settings.setdefault(resource_name, set()).add(permission)
+    return from_settings
+
+
 class PermissionsModel(object):
     id_field = 'id'
     modified_field = 'last_modified'
@@ -41,10 +81,35 @@
         backend = self.request.registry.permission
         perms_by_object_uri = backend.get_accessible_objects(principals)
 
+        # Check settings for every allowed resources.
+        from_settings = allowed_from_settings(self.request.registry.settings, principals)
+
+        # Expand permissions obtained from backend with the object URIs that
+        # correspond to permissions allowed from settings.
+        allowed_resources = {'bucket', 'collection', 'group'} & set(from_settings.keys())
+        if allowed_resources:
+            storage = self.request.registry.storage
+            every_bucket, _ = storage.get_all(parent_id='', collection_id='bucket')
+            for bucket in every_bucket:
+                bucket_uri = '/buckets/{id}'.format(**bucket)
+                for res in allowed_resources:
+                    resource_perms = from_settings[res]
+                    # Bucket is always fetched.
+                    if res == 'bucket':
+                        perms_by_object_uri.setdefault(bucket_uri, []).extend(resource_perms)
+                        continue
+                    # Fetch bucket collections and groups.
+                    # XXX: wrong approach: query in a loop!
+                    every_subobjects, _ = storage.get_all(parent_id=bucket_uri,
+                                                          collection_id=res)
+                    for subobject in every_subobjects:
+                        subobj_uri = bucket_uri + '/{0}s/{1}'.format(res, subobject['id'])
+                        perms_by_object_uri.setdefault(subobj_uri, []).extend(resource_perms)
+
         entries = []
         for object_uri, perms in perms_by_object_uri.items():
             try:
-                # Obtain associated resource from object URI
+                # Obtain associated res from object URI
                 resource_name, matchdict = core_utils.view_lookup(self.request,
                                                                   object_uri)
             except ValueError:

{"golden_diff": "diff --git a/kinto/views/permissions.py b/kinto/views/permissions.py\n--- a/kinto/views/permissions.py\n+++ b/kinto/views/permissions.py\n@@ -1,11 +1,51 @@\n import colander\n from pyramid.security import NO_PERMISSION_REQUIRED, Authenticated\n+from pyramid.settings import aslist\n \n from kinto.authorization import PERMISSIONS_INHERITANCE_TREE\n from kinto.core import utils as core_utils, resource\n from kinto.core.storage.memory import extract_record_set\n \n \n+def allowed_from_settings(settings, principals):\n+    \"\"\"Returns every permissions allowed from settings for the current user.\n+    :param settings dict: app settings\n+    :param principals list: list of principals of current user\n+    :rtype: dict\n+\n+    Result example::\n+\n+        {\n+            \"bucket\": {\"write\", \"collection:create\"},\n+            \"collection\": {\"read\"}\n+        }\n+\n+    XXX: This helper will be useful for Kinto/kinto#894\n+    \"\"\"\n+    perms_settings = {k: aslist(v) for k, v in settings.items()\n+                      if k.endswith('_principals')}\n+    from_settings = {}\n+    for key, allowed_principals in perms_settings.items():\n+        resource_name, permission, _ = key.split('_')\n+        # Keep the known permissions only.\n+        if resource_name not in PERMISSIONS_INHERITANCE_TREE.keys():\n+            continue\n+        # Keep the permissions of the current user only.\n+        if not bool(set(principals) & set(allowed_principals)):\n+            continue\n+        # ``collection_create_principals`` means ``collection:create`` in bucket.\n+        if permission == 'create':\n+            permission = '%s:%s' % (resource_name, permission)\n+            resource_name = {  # resource parents.\n+                'bucket': '',\n+                'collection': 'bucket',\n+                'group': 'bucket',\n+                'record': 'collection'}[resource_name]\n+        # Store them in a convenient way.\n+        from_settings.setdefault(resource_name, set()).add(permission)\n+    return from_settings\n+\n+\n class PermissionsModel(object):\n     id_field = 'id'\n     modified_field = 'last_modified'\n@@ -41,10 +81,35 @@\n         backend = self.request.registry.permission\n         perms_by_object_uri = backend.get_accessible_objects(principals)\n \n+        # Check settings for every allowed resources.\n+        from_settings = allowed_from_settings(self.request.registry.settings, principals)\n+\n+        # Expand permissions obtained from backend with the object URIs that\n+        # correspond to permissions allowed from settings.\n+        allowed_resources = {'bucket', 'collection', 'group'} & set(from_settings.keys())\n+        if allowed_resources:\n+            storage = self.request.registry.storage\n+            every_bucket, _ = storage.get_all(parent_id='', collection_id='bucket')\n+            for bucket in every_bucket:\n+                bucket_uri = '/buckets/{id}'.format(**bucket)\n+                for res in allowed_resources:\n+                    resource_perms = from_settings[res]\n+                    # Bucket is always fetched.\n+                    if res == 'bucket':\n+                        perms_by_object_uri.setdefault(bucket_uri, []).extend(resource_perms)\n+                        continue\n+                    # Fetch bucket collections and groups.\n+                    # XXX: wrong approach: query in a loop!\n+                    every_subobjects, _ = storage.get_all(parent_id=bucket_uri,\n+                                                          collection_id=res)\n+                    for subobject in every_subobjects:\n+                        subobj_uri = bucket_uri + '/{0}s/{1}'.format(res, subobject['id'])\n+                        perms_by_object_uri.setdefault(subobj_uri, []).extend(resource_perms)\n+\n         entries = []\n         for object_uri, perms in perms_by_object_uri.items():\n             try:\n-                # Obtain associated resource from object URI\n+                # Obtain associated res from object URI\n                 resource_name, matchdict = core_utils.view_lookup(self.request,\n                                                                   object_uri)\n             except ValueError:\n", "issue": "Permissions endpoint does not expose perms specified in settings\nEx:\r\n- Set `kinto.bucket_write_principals = system.Authenticated`\r\n- `GET /permissions` should mention every buckets\r\n\r\nRelated #892 #350 \nPermissions endpoint does not expose perms specified in settings\nEx:\r\n- Set `kinto.bucket_write_principals = system.Authenticated`\r\n- `GET /permissions` should mention every buckets\r\n\r\nRelated #892 #350 \n", "before_files": [{"content": "import colander\nfrom pyramid.security import NO_PERMISSION_REQUIRED, Authenticated\n\nfrom kinto.authorization import PERMISSIONS_INHERITANCE_TREE\nfrom kinto.core import utils as core_utils, resource\nfrom kinto.core.storage.memory import extract_record_set\n\n\nclass PermissionsModel(object):\n    id_field = 'id'\n    modified_field = 'last_modified'\n    deleted_field = 'deleted'\n\n    def __init__(self, request):\n        self.request = request\n\n    def get_records(self, filters=None, sorting=None, pagination_rules=None,\n                    limit=None, include_deleted=False, parent_id=None):\n        # Invert the permissions inheritance tree.\n        perms_descending_tree = {}\n        for on_resource, tree in PERMISSIONS_INHERITANCE_TREE.items():\n            for obtained_perm, obtained_from in tree.items():\n                for from_resource, perms in obtained_from.items():\n                    for perm in perms:\n                        perms_descending_tree.setdefault(from_resource, {})\\\n                                             .setdefault(perm, {})\\\n                                             .setdefault(on_resource, set())\\\n                                             .add(obtained_perm)\n\n        # Obtain current principals.\n        principals = self.request.effective_principals\n        if Authenticated in principals:\n            # Since this view does not require any permission (can be used to\n            # obtain public users permissions), we have to add the prefixed\n            # userid among the principals\n            # (see :mod:`kinto.core.authentication`)\n            userid = self.request.prefixed_userid\n            principals.append(userid)\n\n        # Query every possible permission of the current user from backend.\n        backend = self.request.registry.permission\n        perms_by_object_uri = backend.get_accessible_objects(principals)\n\n        entries = []\n        for object_uri, perms in perms_by_object_uri.items():\n            try:\n                # Obtain associated resource from object URI\n                resource_name, matchdict = core_utils.view_lookup(self.request,\n                                                                  object_uri)\n            except ValueError:\n                # Skip permissions entries that are not linked to an object URI\n                continue\n\n            # For consistency with event payloads, prefix id with resource name\n            matchdict[resource_name + '_id'] = matchdict.get('id')\n\n            # Expand implicit permissions using descending tree.\n            permissions = set(perms)\n            for perm in perms:\n                obtained = perms_descending_tree[resource_name][perm]\n                # Related to same resource only and not every sub-objects.\n                # (e.g \"bucket:write\" gives \"bucket:read\" but not \"group:read\")\n                permissions |= obtained[resource_name]\n\n            entry = dict(uri=object_uri,\n                         resource_name=resource_name,\n                         permissions=list(permissions),\n                         **matchdict)\n            entries.append(entry)\n\n        return extract_record_set(entries, filters=filters, sorting=sorting,\n                                  pagination_rules=pagination_rules,\n                                  limit=limit)\n\n\nclass PermissionsSchema(resource.ResourceSchema):\n    uri = colander.SchemaNode(colander.String())\n    resource_name = colander.SchemaNode(colander.String())\n    permissions = colander.Sequence(colander.SchemaNode(colander.String()))\n    bucket_id = colander.SchemaNode(colander.String())\n    collection_id = colander.SchemaNode(colander.String(),\n                                        missing=colander.drop)\n    group_id = colander.SchemaNode(colander.String(),\n                                   missing=colander.drop)\n    record_id = colander.SchemaNode(colander.String(),\n                                    missing=colander.drop)\n\n    class Options:\n        preserve_unknown = False\n\n\n@resource.register(name='permissions',\n                   description='List of user permissions',\n                   collection_path='/permissions',\n                   record_path=None,\n                   collection_methods=('GET',),\n                   permission=NO_PERMISSION_REQUIRED)\nclass Permissions(resource.ShareableResource):\n\n    schema = PermissionsSchema\n\n    def __init__(self, request, context=None):\n        super(Permissions, self).__init__(request, context)\n        self.model = PermissionsModel(request)\n\n    def _extract_sorting(self, limit):\n        # Permissions entries are not stored with timestamp, so do not\n        # force it.\n        result = super(Permissions, self)._extract_sorting(limit)\n        without_last_modified = [s for s in result\n                                 if s.field != self.model.modified_field]\n        return without_last_modified\n\n    def _extract_filters(self, queryparams=None):\n        result = super(Permissions, self)._extract_filters(queryparams)\n        without_last_modified = [s for s in result\n                                 if s.field != self.model.modified_field]\n        return without_last_modified\n", "path": "kinto/views/permissions.py"}], "after_files": [{"content": "import colander\nfrom pyramid.security import NO_PERMISSION_REQUIRED, Authenticated\nfrom pyramid.settings import aslist\n\nfrom kinto.authorization import PERMISSIONS_INHERITANCE_TREE\nfrom kinto.core import utils as core_utils, resource\nfrom kinto.core.storage.memory import extract_record_set\n\n\ndef allowed_from_settings(settings, principals):\n    \"\"\"Returns every permissions allowed from settings for the current user.\n    :param settings dict: app settings\n    :param principals list: list of principals of current user\n    :rtype: dict\n\n    Result example::\n\n        {\n            \"bucket\": {\"write\", \"collection:create\"},\n            \"collection\": {\"read\"}\n        }\n\n    XXX: This helper will be useful for Kinto/kinto#894\n    \"\"\"\n    perms_settings = {k: aslist(v) for k, v in settings.items()\n                      if k.endswith('_principals')}\n    from_settings = {}\n    for key, allowed_principals in perms_settings.items():\n        resource_name, permission, _ = key.split('_')\n        # Keep the known permissions only.\n        if resource_name not in PERMISSIONS_INHERITANCE_TREE.keys():\n            continue\n        # Keep the permissions of the current user only.\n        if not bool(set(principals) & set(allowed_principals)):\n            continue\n        # ``collection_create_principals`` means ``collection:create`` in bucket.\n        if permission == 'create':\n            permission = '%s:%s' % (resource_name, permission)\n            resource_name = {  # resource parents.\n                'bucket': '',\n                'collection': 'bucket',\n                'group': 'bucket',\n                'record': 'collection'}[resource_name]\n        # Store them in a convenient way.\n        from_settings.setdefault(resource_name, set()).add(permission)\n    return from_settings\n\n\nclass PermissionsModel(object):\n    id_field = 'id'\n    modified_field = 'last_modified'\n    deleted_field = 'deleted'\n\n    def __init__(self, request):\n        self.request = request\n\n    def get_records(self, filters=None, sorting=None, pagination_rules=None,\n                    limit=None, include_deleted=False, parent_id=None):\n        # Invert the permissions inheritance tree.\n        perms_descending_tree = {}\n        for on_resource, tree in PERMISSIONS_INHERITANCE_TREE.items():\n            for obtained_perm, obtained_from in tree.items():\n                for from_resource, perms in obtained_from.items():\n                    for perm in perms:\n                        perms_descending_tree.setdefault(from_resource, {})\\\n                                             .setdefault(perm, {})\\\n                                             .setdefault(on_resource, set())\\\n                                             .add(obtained_perm)\n\n        # Obtain current principals.\n        principals = self.request.effective_principals\n        if Authenticated in principals:\n            # Since this view does not require any permission (can be used to\n            # obtain public users permissions), we have to add the prefixed\n            # userid among the principals\n            # (see :mod:`kinto.core.authentication`)\n            userid = self.request.prefixed_userid\n            principals.append(userid)\n\n        # Query every possible permission of the current user from backend.\n        backend = self.request.registry.permission\n        perms_by_object_uri = backend.get_accessible_objects(principals)\n\n        # Check settings for every allowed resources.\n        from_settings = allowed_from_settings(self.request.registry.settings, principals)\n\n        # Expand permissions obtained from backend with the object URIs that\n        # correspond to permissions allowed from settings.\n        allowed_resources = {'bucket', 'collection', 'group'} & set(from_settings.keys())\n        if allowed_resources:\n            storage = self.request.registry.storage\n            every_bucket, _ = storage.get_all(parent_id='', collection_id='bucket')\n            for bucket in every_bucket:\n                bucket_uri = '/buckets/{id}'.format(**bucket)\n                for res in allowed_resources:\n                    resource_perms = from_settings[res]\n                    # Bucket is always fetched.\n                    if res == 'bucket':\n                        perms_by_object_uri.setdefault(bucket_uri, []).extend(resource_perms)\n                        continue\n                    # Fetch bucket collections and groups.\n                    # XXX: wrong approach: query in a loop!\n                    every_subobjects, _ = storage.get_all(parent_id=bucket_uri,\n                                                          collection_id=res)\n                    for subobject in every_subobjects:\n                        subobj_uri = bucket_uri + '/{0}s/{1}'.format(res, subobject['id'])\n                        perms_by_object_uri.setdefault(subobj_uri, []).extend(resource_perms)\n\n        entries = []\n        for object_uri, perms in perms_by_object_uri.items():\n            try:\n                # Obtain associated res from object URI\n                resource_name, matchdict = core_utils.view_lookup(self.request,\n                                                                  object_uri)\n            except ValueError:\n                # Skip permissions entries that are not linked to an object URI\n                continue\n\n            # For consistency with event payloads, prefix id with resource name\n            matchdict[resource_name + '_id'] = matchdict.get('id')\n\n            # Expand implicit permissions using descending tree.\n            permissions = set(perms)\n            for perm in perms:\n                obtained = perms_descending_tree[resource_name][perm]\n                # Related to same resource only and not every sub-objects.\n                # (e.g \"bucket:write\" gives \"bucket:read\" but not \"group:read\")\n                permissions |= obtained[resource_name]\n\n            entry = dict(uri=object_uri,\n                         resource_name=resource_name,\n                         permissions=list(permissions),\n                         **matchdict)\n            entries.append(entry)\n\n        return extract_record_set(entries, filters=filters, sorting=sorting,\n                                  pagination_rules=pagination_rules,\n                                  limit=limit)\n\n\nclass PermissionsSchema(resource.ResourceSchema):\n    uri = colander.SchemaNode(colander.String())\n    resource_name = colander.SchemaNode(colander.String())\n    permissions = colander.Sequence(colander.SchemaNode(colander.String()))\n    bucket_id = colander.SchemaNode(colander.String())\n    collection_id = colander.SchemaNode(colander.String(),\n                                        missing=colander.drop)\n    group_id = colander.SchemaNode(colander.String(),\n                                   missing=colander.drop)\n    record_id = colander.SchemaNode(colander.String(),\n                                    missing=colander.drop)\n\n    class Options:\n        preserve_unknown = False\n\n\n@resource.register(name='permissions',\n                   description='List of user permissions',\n                   collection_path='/permissions',\n                   record_path=None,\n                   collection_methods=('GET',),\n                   permission=NO_PERMISSION_REQUIRED)\nclass Permissions(resource.ShareableResource):\n\n    schema = PermissionsSchema\n\n    def __init__(self, request, context=None):\n        super(Permissions, self).__init__(request, context)\n        self.model = PermissionsModel(request)\n\n    def _extract_sorting(self, limit):\n        # Permissions entries are not stored with timestamp, so do not\n        # force it.\n        result = super(Permissions, self)._extract_sorting(limit)\n        without_last_modified = [s for s in result\n                                 if s.field != self.model.modified_field]\n        return without_last_modified\n\n    def _extract_filters(self, queryparams=None):\n        result = super(Permissions, self)._extract_filters(queryparams)\n        without_last_modified = [s for s in result\n                                 if s.field != self.model.modified_field]\n        return without_last_modified\n", "path": "kinto/views/permissions.py"}]}