Get Tree

This API request returns a tree of entities built on specified graph type relations.

Request

GET {TenantURL}/{entity object URI}/_tree

Table 1. Parameters
Parameter	Name	Required	Details
Headers	`Authorization`	Yes	This parameter provides information about the authentication access token using the format, `Bearer <accessToken>` (For more information see Authentication API.
Query	`graphTypeURIs`	Yes	Comma-separated list of graph types URIs for graphs to be traversed. For more information, see Configuring Graph Types.
	`select`	No	Comma-separated list of properties from the object structure that should be returned in a response. Allows you to return a partial object. This parameter can be used to include the following fields: entity label (using the `label` keyword) entity secondaryLabel (using the `secondaryLabel` keyword) entity attributes (prefixing `entities` before the `attributes` keyword) Note: The `select` parameter supports all attributes. The following query returns data for all fields: `select=label,secondaryLabel,entities.attributes` Note: Data is also returned for all fields if the `select` parameter is not used in the request.
	`options`	No	This is a comma-separated list of different options, which affect on entity's JSON content in a response. Available options: `sendHidden`- disabled by default, entity's JSON will contain hidden attributes if this option is enabled. `ovOnly`- return only attribute values that have `ov=true` flag. `nonOvOnly`- return only attribute values that have `ov=false` flag. If you have a nested or reference attribute value where `ov=true`, but sub-attributes where `ov=false`, then these sub attributes will not appear in the response. `reverseRelations` - return hierarchy with reversed directions of all relations. This means relations' start objects will be treated as end objects and vice versa.

Response

This request will return the tree (built on specified graph type relations) that contains:

1. Initial entity (specified by the {id} parameter).

2. The entity's parent.

3. All the parent's children.

4. The parent's parent (with all its children) and so on... Till the last parent in the tree.

Also, each node will contain the number of child elements inside it.

The format of the result (success response) is the following:

{
	"success": "true",
	"root": {
		"entity": "entity content, including label/secondaryLabel, attributes",
		"total": 50,
		"children": [{
				"entity": "entity content, including label/secondaryLabel, attributes",
				"relation": "relation content which connects the entity with its parent",
				"parent": "URI of parent entity",
				"total": 0
			},
			{
				"entity": "entity content, including label/secondaryLabel, attributes",
				"relation": "relation content which connects the entity with its parent",
				"parent": "URI of parent entity",
				"total": 5,
				"children": [
					...
				]
			},
			....
		]
	}
}

In the case of an entity that has several parents, the parent attribute of the response is an array of URIs, and the relation attribute is an array of relations.

Note: Reltio recommends that you do not use the _tree request in scripts for the following reasons:

_tree request always reads several graph levels for tree definition and consumes many platform resources. These requests fetch large volumes of data and can cause slowness in the process.
The response could take a long time (up to several minutes) for large hierarchies.

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Get Tree

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