layout: default
navsection: api
navmenu: Concepts
-title: REST methods
+title: Common resource methods
...
+{% comment %}
+Copyright (C) The Arvados Authors. All rights reserved.
-h1. REST Methods
+SPDX-License-Identifier: CC-BY-SA-3.0
+{% endcomment %}
-(using Group as an example)
+The following methods are available for most resources. Some resources may limit who can perform certain operations. Consult documentation for individual resource types for details.
-h2(#index). Index, list, search
+The methods are relative to the base URI, e.g., @/arvados/v1/resource_type@. For arguments specifying a *Location* of @path@, the value of the argument is incorporated into the path portion of the URI. For example, a @uuid@ of @aaaaa-bbbbb-ccccccccccccccc@ in a path position yields a URI of @/arvados/v1/resource_type/aaaaa-bbbbb-ccccccccccccccc@.
-<pre>
-GET https://{{ site.arvados_api_host }}/arvados/v1/groups?where[owner_uuid]=xyzzy-tpzed-a4lcehql0dv2u25
-
-POST https://{{ site.arvados_api_host }}/arvados/v1/groups
-_method=GET
-where[owner_uuid]=xyzzy-tpzed-a4lcehql0dv2u25
-</pre>
+Arguments specifying a *Location* of @query@ are incorporated into the query portion of the URI or request body. For example, @/arvados/v1/resource_type?resource_type={}@.
-→ Group resource list
+h2. create
+
+The @create@ method creates a new object of the specified type. Note that:
+
+* Only the listed attributes (and "standard metadata":resources.html) are set
+* Unset attributes will get default values
+* The attributes of a given resource type are fixed (you cannot introduce new toplevel attributes)
+
+This method corresponds to the HTTP request @POST /arvados/v1/resource_type@. A successful create call returns a copy of the new object.
+
+Arguments:
table(table table-bordered table-condensed).
-|*Parameter name*|*Value*|*Description*|
-|max_results|integer|Maximum number of resources to return|
-|page_token|string||
-|where{}|list|Attribute values to search for|
+|_. Argument |_. Type |_. Description |_. Location |
+|{resource_type}|object|Name is the singular form of the resource type, e.g., for the "collections" resource, this argument is "collection"|query||
-h2. Create
+h2. delete
-<pre>
-POST https://{{ site.arvados_api_host }}/arvados/v1/groups
-group={"name":"fresh new group"}
-</pre>
+The @delete@ method deletes an object of the specified type. It corresponds to the HTTP request @DELETE /arvados/v1/resource_type/uuid@. A successful delete call returns a copy of the deleted object.
-→ Group resource
+Arguments:
-h2. Delete
+table(table table-bordered table-condensed).
+|_. Argument |_. Type |_. Description |_. Location |
+{background:#ccffcc}.|uuid|string|The UUID of the object in question.|path|
-<pre>
-DELETE https://{{ site.arvados_api_host }}/arvados/v1/groups/xyzzy-ldvyl-vyydjeplwaa6emg
-</pre>
+h2. get
-→ Group resource
+The @get@ method gets a single object with the specified @uuid@. It corresponds to the HTTP request @GET /arvados/v1/resource_type/uuid@.
-h2. Show
+Arguments:
-<pre>
-GET https://{{ site.arvados_api_host }}/arvados/v1/groups/xyzzy-ldvyl-vyydjeplwaa6emg
-</pre>
+table(table table-bordered table-condensed).
+|_. Argument |_. Type |_. Description |_. Location |
+{background:#ccffcc}.|uuid|string|The UUID of the object in question.|path|
-→ Group resource
+h2(#index). list
-h2. Update
+The @list@ method requests an list of resources of that type. It corresponds to the HTTP request @GET /arvados/v1/resource_type@. All resources support "list" method unless otherwise noted.
-<pre>
-PUT https://{{ site.arvados_api_host }}/arvados/v1/groups/xyzzy-ldvyl-vyydjeplwaa6emg
-group={"uuid":"xyzzy-ldvyl-vyydjeplwaa6emg", "name":"Important group"}
-</pre>
+Arguments:
-→ Group resource
+table(table table-bordered table-condensed).
+|_. Argument |_. Type |_. Description |_. Location |
+|limit |integer|Maximum number of resources to return. If not provided, server will provide a default limit. Server may also impose a maximum number of records that can be returned in a single request.|query|
+|offset |integer|Skip the first 'offset' number of resources that would be returned under the given filter conditions.|query|
+|filters |array |"Conditions for selecting resources to return.":#filters|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.
+Example: @["head_uuid asc","modified_at desc"]@
+Default: @["created_at desc"]@|query|
+|select |array |Set of attributes to include in the response.
+Example: @["head_uuid","tail_uuid"]@
+Default: all available attributes. As a special case, collections do not return "manifest_text" unless explicitly selected.|query|
+|distinct|boolean|@true@: (default) do not return duplicate objects
+@false@: permitted to return duplicates|query|
+|count|string|@"exact"@ (default): Include an @items_available@ response field giving the number of distinct matching items that can be retrieved (irrespective of @limit@ and @offset@ arguments).
+@"none"@: Omit the @items_available@ response field. This option will produce a faster response.|query|
+
+h3(#filters). Available list method filters
+
+The value of the @filters@ parameter is an array of conditions. The @list@ method returns only the resources that satisfy all of the given conditions. In other words, the conjunction @AND@ is implicit.
+
+Each condition is expressed as an array with three elements: @[attribute, operator, operand]@.
-<pre>
-PUT https://{{ site.arvados_api_host }}/arvados/v1/groups/xyzzy-ldvyl-vyydjeplwaa6emg
-group[uuid]=xyzzy-ldvyl-vyydjeplwaa6emg
-group[name]=Important group
-</pre>
+table(table table-bordered table-condensed).
+|_. Index|_. Element|_. Type|_. Description|_. Examples|
+|0|attribute|string|Name of the attribute to compare (or "any" to return resources with any matching attribute)|@script_version@, @head_uuid@, @any@|
+|1|operator|string|Comparison operator|@>@, @>=@, @like@, @not in@|
+|2|operand|string, array, or null|Value to compare with the resource attribute|@"d00220fb%"@, @"1234"@, @["foo","bar"]@, @nil@|
-→ Group resource
+The following operators are available.
-More appropriate (but not yet implemented):
+table(table table-bordered table-condensed).
+|_. Operator|_. Operand type|_. Example|
+|@<@, @<=@, @>=@, @>@, @like@, @ilike@|string|@["script_version","like","d00220fb%"]@|
+|@=@, @!=@|string or null|@["tail_uuid","=","xyzzy-j7d0g-fffffffffffffff"]@
+@["tail_uuid","!=",null]@|
+|@in@, @not in@|array of strings|@["script_version","in",["master","d00220fb38d4b85ca8fc28a8151702a2b9d1dec5"]]@|
+|@is_a@|string|@["head_uuid","is_a","arvados#pipelineInstance"]@|
+
+h3. Results of list method
-<pre>
-PATCH https://{{ site.arvados_api_host }}/arvados/v1/groups/xyzzy-ldvyl-vyydjeplwaa6emg
-group={"uuid":"xyzzy-ldvyl-vyydjeplwaa6emg", "name":"Important group"}
-</pre>
+A successful call to list will return the following object.
+
+table(table table-bordered table-condensed).
+|_. Attribute |_. Type |_. Description |
+|kind|string|type of objects returned|
+|offset|integer|query offset in effect|
+|limit|integer|query limit in effect|
+|items|array|actual query payload, an array of resource objects|
+|items_available|integer|total items available matching query|
-→ Group resource
+h2. update
+
+The @update@ method updates fields on the object with the specified @uuid@. It corresponds to the HTTP request @PUT /arvados/v1/resource_type/uuid@. Note that only the listed attributes (and "standard metadata":resources.html) are updated, unset attributes will retain their previous values, and the attributes of a given resource type are fixed (you cannot introduce new toplevel attributes). Also note that updates replace the value of the attribute, so if an attribute has an object value, the entire object is replaced. A successful update call returns the updated copy of the object.
+
+table(table table-bordered table-condensed).
+|_. Argument |_. Type |_. Description |_. Location |
+{background:#ccffcc}.|uuid|string|The UUID of the resource in question.|path||
+|{resource_type}|object||query||
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