Updating a Label

Function

In the current version, this API can only add properties to the end of existing labels, but cannot delete existing properties or update the property sequence.

URI

POST /ges/v1.0/{project_id}/graphs/{graph_name}/schema?label={labelName}

**Table 1** URI parameters
Parameter	Mandatory	Type	Description
project_id	Yes	String	Project ID. For details about how to obtain the project ID, see Obtaining a Project ID.
graph_name	Yes	String	Graph name
label_name	Yes	String	Label name

Request Parameters

**Table 2** Request body parameters
Parameter	Mandatory	Type	Description
type	No	String	Label type, indicating that the label is used for vertices or edges. The options are as follows: vertex: indicates that the label is used for vertices. edge: indicates that the label is used for edges. all: indicates that the label is used for vertices and edges. The default value is all.
properties	Yes	Object	Property array to be appended. Table 3 describes the parameters in an array.

**Table 3** properties parameter description
Parameter	Mandatory	Type	Description
property	No	Object	Label properties. For details about the parameters, see Table 4.

**Table 4** **property** parameters
Parameter	Mandatory	Type	Description
name	Yes	String	Property name A property name can contain a maximum of 256 characters. A property name cannot contain <, >, &, ASCCI 14,15 and 30. The property under a label must be unique.
cardinality	Yes	String	Composite type of a property. Currently, only single is supported.
dataType	Yes	String	Data type of a property. For details, see the metadata types in Specification Description.

Response Parameters

**Table 5** Response body parameters
Parameter	Type	Description
errorMessage	String	System prompt. If execution succeeds, this parameter may be left blank. If execution fails, this parameter is used to display the error message.
errorCode	String	System prompt. If execution succeeds, this parameter may be left blank. If execution fails, this parameter is used to display the error code.
result	String	Request result. If the request is successful, the value is success. If the request fails, the value is failed.

Example Request

Update a label. The label name is book. The label has one property to update.

POST /ges/v1.0/{project_id}/graphs/{graph_name}/schema?label={labelName}
{
  "type": "vertex",
  "properties": [
    {
      "property": {
        "name": "Title",
        "cardinality": "single",
        "dataType": "string"
      }
    },
    {
      "property": {
        "name": "Version",
        "cardinality": "single",
        "dataType": "string"
      }
    }
  ]
}

SERVER_URL: Address for accessing a graph. For details about its value, see Using Service Plane APIs.

Example Response

Status code: 200

Example response for a successful request

Http Status Code: 200
{
 "result": "success"
}

Status code: 400

Example response for a failed request

Http Status Code: 400
 {
  "errorMessage": "label already exists",
  "errorCode": "GES.8801"
 }

Status Codes

Return Value	Description
400 Bad Request	Request error.
401 Unauthorized	Authorization failed.
403 Forbidden	No operation permissions.
404 Not Found	No resources found.
500 Internal Server Error	Internal server error.
503 Service Unavailable	Service unavailable.