groups

API endpoint base: https://pirca.arvadosapi.com/arvados/v1/groups

Object type: j7d0g

Example UUID: zzzzz-j7d0g-0123456789abcde

Resource

Groups provides a way to apply the same permissions to a set of Arvados objects. See permission model for details.

Each Group has, in addition to the Common resource fields:

Attribute	Type	Description	Example
name	string
group_class	string	Type of group. project and filter indicate that the group should be displayed by Workbench and arv-mount as a project for organizing and naming objects. role is used as part of the permission system.	"filter" "project" "role"
description	text	Free text description of the group. Allows HTML formatting.
properties	hash	User-defined metadata, may be used in queries using subproperty filters
can_write	boolean	True if the current user has write permission on this group.
can_manage	boolean	True if the current user has manage permission on this group.
trash_at	datetime	If trash_at is non-null and in the past, this group and all objects directly or indirectly owned by the group will be hidden from API calls. May be untrashed as long as delete_at is in the future.
delete_at	datetime	If delete_at is non-null and in the past, the group and all objects directly or indirectly owned by the group may be permanently deleted.
is_trashed	datetime	True if trash_at is in the past, false if not.
frozen_by_uuid	string	For a frozen project, indicates the user who froze the project; null in all other cases. When a project is frozen, no further changes can be made to the project or its contents, even by admins. Attempting to add new items or modify, rename, move, trash, or delete the project or its contents, including any subprojects, will return an error.

Group types and states

Project groups

Groups with group_class: project are used to organize objects and subprojects through ownership. When trashed or deleted, all items owned by the project (including subprojects, collections, or container requests) as well as permissions (permission links) granted to the project are also trashed or deleted.

Role groups

Groups with group_class: role are used to grant permissions to users (or other groups) through permission links. Role groups can confer “can_manage” permission but cannot directly own objects. When trashed and deleted group membership and permission grants (expressed as permission links) are deleted as well.

Filter groups

Groups with group_class: filter groups are virtual groups; they can not own other objects, but instead their contents (as returned by the contents API method) are defined by a query. Filter groups have a special properties field named filters, which must be an array of filter conditions. See list method filters for details on the syntax of valid filters, but keep in mind that the attributes must include the object type (collections, container_requests, groups, workflows), separated with a dot from the field to be filtered on.

Filters are applied with an implied and between them, but each filter only applies to the object type specified. The results are subject to the usual access controls – they are a subset of all objects the user can see. Here is an example:

 "properties":{
  "filters":[
   [
    "groups.name",
    "like",
    "Public%"
   ]
  ]
 },

This filter group will return all groups (projects) that have a name starting with the word Public and are visible to the user issuing the query. Because groups can contain many types of object, it will also return all objects of other types that the user can see.

The ‘is_a’ filter operator is of particular interest to limit the filter group ‘content’ to the desired object(s). When the ‘is_a’ operator is used, the attribute must be ‘uuid’. The operand may be a string or an array which means objects of either type will match the filter. This example will return all groups (projects) that have a name starting with the word Public, as well as all collections that are in the project with uuid zzzzz-j7d0g-0123456789abcde.

 "properties":{
  "filters":[
   [
    "groups.name",
    "like",
    "Public%"
   ],
   [
    "collections.owner_uuid",
    "=",
    "zzzzz-j7d0g-0123456789abcde"
   ],
   [
    "uuid",
    "is_a",
    [
     "arvados#group",
     "arvados#collection"
    ]
   ]
  ]
 },
 

Trashed or deleting a filter group causes the group itself to be hidden or deleted, but has no effect on the items returned in “contents”, i.e. the database objects in “contents” are not hidden or deleted and may be accessed by other means.

Trashing groups

Groups can be trashed by updating the record and setting the trash_at field, or with the delete method. The delete method sets trash_at to “now”.

The value of trash_at can be set to a time in the future as a feature to automatically expire groups.

When trash_at is set, delete_at will also be set. Normally delete_at = trash_at + Collections.DefaultTrashLifetime for projects and filter groups, and delete_at = trash_at for role groups. When the trash_at time is past but delete_at is in the future, the trashed group is invisible to most API calls unless the include_trash parameter is true. All objects directly or indirectly owned by the group (including subprojects, collections, or container requests) are considered trashed as well. Groups in the trashed state can be untrashed so long as delete_at has not past.

Once delete_at is past, the group will be deleted permanently and can no longer be untrashed. Different group types have different behavior when deleted, described above.

Note: like other groups, “role” groups may have trash_at set to date in the future, however roles groups are required to have delete_at = trash_at, so the trash time and delete time expire at the same time. This means once trash_at expires the role group is deleted immediately. Role groups with trash_at set can only be untrashed before they expire.

Frozen projects

A user with manage permission can set the frozen_by_uuid attribute of a project group to their own user UUID. Once this is done, no further changes can be made to the project or its contents, including subprojects.

The frozen_by_uuid attribute can be cleared by an admin user. It can also be cleared by a user with manage permission, unless the API.UnfreezeProjectRequiresAdmin configuration setting is active.

The optional API.FreezeProjectRequiresDescription and API.FreezeProjectRequiresProperties configuration settings can be used to prevent users from freezing projects that have empty description and/or empty properties entries.

Methods

See Common resource methods for more information about create, delete, get, list, and update.

Required arguments are displayed in green.

contents

Retrieve a list of items owned by the group or user. Use “recursive” to list objects within subprojects as well.

Arguments:

Argument	Type	Description	Location	Example
uuid	string	The UUID of the group or user to enumerate. If this is a user UUID, this method returns the contents of that user’s home project.	path
limit	integer (default 100)	Maximum number of items to return.	query
order	array	Attributes to use as sort keys to determine the order resources are returned, each optionally followed by asc or desc to indicate ascending or descending order. Sort within a resource type by prefixing the attribute with the resource name and a period.	query	["collections.modified_at desc"]
filters	array	Conditions for filtering items.	query	[["uuid", "is_a", "arvados#job"]]
recursive	boolean (default false)	Include items owned by subprojects.	query	true
exclude_home_project	boolean (default false)	Only return items which are visible to the user but not accessible within the user’s home project. Use this to get a list of items that are shared with the user. Uses the logic described under the “shared” endpoint.	query	true
include	array	Look up objects referenced by the indicated fields and include them in the response. Only “owner_uuid” and “container_uuid” are supported. If “owner_uuid” is given, the parent project or user will be returned. If “container_uuid” is given and container requests are returned in the response, the corresponding container records will also be returned. These referenced objects will be returned in the “included” field of the response. For compatibility, a string "owner_uuid" is accepted as equivalent to ["owner_uuid"].	query	"owner_uuid" ["owner_uuid","container_uuid"]
include_trash	boolean (default false)	Include trashed objects.	query	true
include_old_versions	boolean (default false)	Include past versions of the collections being listed.	query	true
select	array	Attributes of each object to return in the response. Specify an unqualified name like uuid to select that attribute on all object types, or a qualified name like collections.name to select that attribute on objects of the specified type. By default, all available attributes are returned, except on collections, where manifest_text is not returned and cannot be selected due to an implementation limitation. This limitation may be removed in the future.	query	["uuid", "collections.name"]

Notes:

Because adding access tokens to manifests can be computationally expensive, the manifest_text field is not included in listed collections. If you need it, request a list of collections with the filter ["owner_uuid", "=", GROUP_UUID], and "manifest_text" listed in the select parameter.

Use filters with the attribute format <item type>.<field name> to filter items of a specific type. For example: ["container_requests.state", "=", "Final"] to filter container_requests where state is Final. All other types of items owned by this group will be unimpacted by this filter and will still be included.

When called with “include=owner_uuid”, the included field of the response is populated with users, projects, or other groups that own the objects returned in items. This can be used to fetch an object and its parent with a single API call.

When called with “include=container_uuid”, the included field of the response is populated with the container associated with each container request in the response.

create

Create a new Group.

Arguments:

Argument	Type	Description	Location	Example
group	object		query
async	boolean (default false)	Defer the permissions graph update by a configured number of seconds. (By default, async_permissions_update_interval is 20 seconds). On success, the response is 202 (Accepted).	query	true

delete

Put a Group in the trash. See Trashing groups for details.

Arguments:

Argument	Type	Description	Location	Example
uuid	string	The UUID of the Group in question.	path

get

Gets a Group’s metadata by UUID.

Arguments:

Argument	Type	Description	Location	Example
uuid	string	The UUID of the Group in question.	path

list

List groups.

See common resource list method.

show

show groups

Arguments:

Argument	Type	Description	Location	Example
uuid	string		path

update

Update attributes of an existing Group.

Arguments:

Argument	Type	Description	Location	Example
uuid	string	The UUID of the Group in question.	path
group	object		query
async	boolean (default false)	Defer the permissions graph update by a configured number of seconds. (By default, async_permissions_update_interval is 20 seconds). On success, the response is 202 (Accepted).	query	true

untrash

Remove a Group from the trash. Only valid when delete_at is in the future. This sets the trash_at and delete_at fields to null.

Arguments:

Argument	Type	Description	Location	Example
uuid	string	The UUID of the Group to untrash.	path
ensure_unique_name	boolean (default false)	Rename project uniquely if untrashing it would fail with a unique name conflict.	query

shared

This endpoint returns the toplevel set of groups to which access is granted through a chain of one or more permission links rather than through direct ownership by the current user account. This is useful for clients which wish to browse the list of projects the user has permission to read which are not part of the “home” project tree. Similar behavior is also available with the exclude_home_project option of the “contents” endpoint.

Specifically, the logic is:

select groups that are readable by current user AND
    (the owner_uuid is a user (but not the current user) OR
     the owner_uuid is not readable by the current user OR
     the owner_uuid is a group but group_class is not a project)

Argument	Type	Description	Location	Example
include	string	If provided with the value “owner_uuid”, this will return owner objects in the included field of the response.	query

Notes:

When called with “include=owner_uuid”, the included field of the response is populated with users and non-project groups that own the objects returned in items.

In addition to the “include” parameter this endpoint also supports the same parameters as the list method.

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