Using Node.js with Caché - InterSystems Documentation

Advanced Data Access with retrieve() and update()
3.5.2 Using update()
The update() method allows an application to save a group of global nodes by passing information saved in a single JSON
object. The nodes can represent either an array or an object:
• Save a list of global nodes (update("array"))
• Save a structured data object (update("object"))
3.5.2.1 Save a list of global nodes (update("array"))
This method performs the opposite task to that performed by the retrieve method. In other words the update method takes
an array of global nodes, each expressed as a single JSON object and writes them back to the Caché database.
Example 1: Create or update a record for a customer
mydata.update(
[
{
global: "Customer",
subscripts: [1],
data: "Chris Munt"
}
{
global: "Customer",
subscripts: [1, "Address", 1],
data: "London"
}
{
global: "Customer",
subscripts: [1, "Address", 2],
data: "UK"
}
{
global: "Customer",
subscripts: [1, "DateOfRegistration"],
data: "1 May 2010"
}
],
"array",
function(error, result) { // callback code }
);
Result:
Operation successful if no error reported.
3.5.2.2 Save a structured data object (update("object"))
This method performs the opposite task to that performed by the retrieve method. In other words it writes the contents of
a structured JSON object back to the Caché database.
Example 1: Create or update a record for a customer
mydata.update(
node: {
global: "Customer",
subscripts: [1]
},
Object: {
Name: "Chris Munt",
DateOfRegistration: "1 May 2010",
Address: {"1": "London", "2": "UK"}
},
"object",
function(error, result) { // callback code }
);
Result:
Using Node.js with Caché 15