Using Node.js with Caché - InterSystems Documentation

Reference for cache.node Methods
}
global: "Customer",
subscripts: [1],
data: "Chris Munt",
defined: 1
If there is no further node defined in the sequence then the defined property will be set to zero.
4.16 retrieve()
• The retrieve(node, "list") method will return a list of subscript values that are defined directly beneath a
given level in the global.
• The retrieve(node, "array") method will return a list of subscript values together with their associated data
values that are defined beneath a given level in the global. The method is recursive and will retrieve all global nodes
defined beneath a chosen level.
The result will be expressed as an array of global nodes, with each global node expressed as a single JSON object.
• The retrieve(node, "object") method will retrieve a structured data object defined beneath a given level in
a global. This method provides a structured alternative to an array of global nodes.
The result will be expressed as a single JSON object.
Synchronous
Asynchronous
Parameters
var result = mydata.retrieve(node, type);
mydata.retrieve(node, type, callback_function);
• node — the global node to be accessed.
• type — a literal string specifying the type of data to be accessed. Options are:
– "list"
– "array"
– "object"
• callback_function — a function of the form function(error, result){} used to return results
asynchronously (see “Synchronous vs. Asynchronous cache.node Methods”).
Example 1 (type = “list”): Retrieve a list of customer numbers
mydata.retrieve(
{global: "Customer"},
"list",
function(error, result) { // callback code }
);
Result:
Three Customer records:
[1, 2, 3]
30 Using Node.js with Caché