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 |
|---|---|---|
|
The name of the attribute. |
|
|
The type of the attribute |
|
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") -> 5.2isDirected()
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.
Return type
No return value.
Parameters
| Parameter | Description | Data type |
|---|---|---|
|
The name of the attribute. This argument must be a query parameter. |
|
|
The new value of the attribute |
The type of the attribute. |
Example
CREATE QUERY setAttrExample(STRING attr){ (1)
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); (2)
}| 1 | The first argument of e.setAttr must be a query parameter.
Therefore, in this example we are passing a string value in the query parameter attr.
The string value should be the name of the attribute you want to call the function with. |
| 2 | Selected edges will have their specified attribute set to TRUE. |