Edge Methods

This page lists all built-in edge methods that can be accessed by edge aliases using the dot (.) operator.

getAttr()

Syntax

e.getAttr( attrName, attrType )

Description

Returns the value of an attribute of the edge.

Return type

The data type of the attribute itself.

Parameters

Parameter Description Data type

attrName

The name of an attribute. This can be a query parameter, constant string, or global string variable.

Base types: STRING, INT, UINT, DATETIME, DOUBLE, FLOAT, BOOL

Container types follow the format CONTAINER<TYPE>, where CONTAINER can be LIST or SET and TYPE can be INT, DATETIME, DOUBLE, or STRING.

Type conversion is supported between numerical values and between LIST and SET types. For example, an edge with an attribute of type LIST<INT> can be retrieved as SET<DOUBLE>.

attrType

The type of the attribute

STRING

Example

If we have the following edge:

{
      "e_type": "User_Video",
      "directed": false,
      "from_id": "0",
      "from_type": "VidUser",
      "to_id": "2",
      "to_type": "Video",
      "attributes": {
        "rating": 5.2,
        "date_time": 0
}

Assume the alias of the edge is e:

e.getAttr("rating", "DOUBLE") -> 5.2

isDirected()

Syntax

e.isDirected()

Description

Returns a boolean value indicating whether the edge is directed or undirected.

Return type

BOOL

Parameters

None.

setAttr()

Syntax

e.setAttr( attrName, attrNewValue )

Description

Sets an attribute of an edge to a new value.

Type conversion is not allowed for setAttr(). The input variable types must match the types in the attribute.

Return type

No return value.

Parameters

Parameter Description Data type

attrName

The name of the attribute. This can be a query parameter, constant string, or global string variable.

STRING

attrNewValue

The new value of the attribute

The type of the attribute.

Example

CREATE QUERY setAttrExample(STRING attr){
    Current = {v_type.*}
    S = SELECT s
            FROM Current:s -(e_type:e) -> v_type:t
            WHERE t.attribute1 == "example_value"
            ACCUM e.setAttr(attr, TRUE); (1)
}
1 Selected edges will have their specified attribute set to TRUE.