Querying Graph Metadata Details

Function

This API is used to query graph metadata details.

URI

GET /ges/v1.0/{project_id}/graphs/{graph_name}/schema

**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

Response Parameters

**Table 2** 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.
data	Object	Query results. This parameter is left blank when the request fails.

**Table 3** data parameter description
Parameter	Type	Description
schema	List	Definition of each label and their associated property fields

**Table 4** schema parameter description
Parameter	Type	Description
label	String	label name
properties	Object	Property array. For details, see properties parameter description.
type	String	Label type, indicating that the label is used for vertices or edges.

**Table 5** properties parameter description
Parameter	Type	Description
name	String	Property name A property name can contain a maximum of 256 characters. A property name cannot contain <, >, &, ASCII 14, 15, or 30. The property under a label must be unique.
cardinality	String	Composite type of a property. Currently, only single is supported.
dataType	String	Data type of a property. For details, see the metadata types in Specification Description.

Example Request

Query metadata details of a graph.

GET http://{SERVER_URL}/ges/v1.0/{project_id}/graphs/{graph_name}/schema

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
{
    "data": {
        "schema": [
            {
                "label": "__DEFAULT__",
                "type": "all"
            },
            {
                "label": "friends",
                "type": "vertex"
            },
            {
                "label": "movie",
                "type": "vertex",
                "properties": [
                    {
                        "name": "ChineseTitle",
                        "type": "string",
                        "cardinality": "single"
                    },
                    {
                        "name": "Year",
                        "type": "int",
                        "cardinality": "single"
                    }
                ]
            },
            {
                "label": "user",
                "type": "vertex",
                "properties": [
                    {
                        "name": "Name",
                        "type": "string",
                        "cardinality": "single"
                    },
{
                        "name": "Occupation",
                        "type": "string",
                        "cardinality": "single"
                    },
                    {
                        "name": "Zip-code",
                        "type": "char array",
                        "cardinality": "single
"
                    }
                ]
            },
            {
                "label": "rate",
                "type": "edge",
                "properties": [
                    {
                        "name": "Score",
                        "type": "int",
                        "cardinality": "single"
                    },
                    {
                        "name": "Datetime",
                        "type": "date",
                        "cardinality": "single"
                    }
                ]
            }
        ]
    }
}

Status code: 400

Example response for a failed request

Http Status Code: 400
{
  "errorMessage": "graph [demo] is not found",
  "errorCode": "GES.8003"
}

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.