Using Node.js with Caché - InterSystems Documentation

next_node()
• callback_function — a function of the form function(error, result){} used to return results
asynchronously (see “Synchronous vs. Asynchronous cache.node Methods”).
Example 1 (Synchronous)
Result:
result = mydata.order({global: "Customer", subscripts: [""]},
{global: "Customer", subscripts: [1], result: "1"}}
Example 2 (Synchronous)
Result:
result = mydata.next({global: "Customer", subscripts: [3]},
{global: "Customer", subscripts: [""], result: ""}}
Example 3 (Asynchronous)
mydata.next(
{global: "Customer", subscripts: [1]},
function(error, result) { // callback code }
);
Result:
{global: "Customer", subscripts: [2], result: "2"}}
Example 4 (Parse at the first level)
key = {global: "Customer", subscripts: [""]};
while ((key = user.next(key)).result != "") {
console.log(JSON.stringify(key, null, '\t'))
}
Result:
{global: "Customer", subscripts: [1], result: "1"}}
{global: "Customer", subscripts: [2], result: "2"}}
{global: "Customer", subscripts: [3], result: "3"}}
If there is no further subscript defined in the sequence then the result property will be returned as empty string
("").
4.12 next_node()
The next_node() method gets the next global node in the collating sequence regardless of the level of subscript.
Synchronous
var result = mydata.next_node(node);
Asynchronous
mydata.next_node(node, callback_function);
Parameters
• node — the global node to be accessed.
Using Node.js with Caché 25