Perform the Advanced GET operation where Eventing interacts with the Data Service.
The advancedGetOp function:
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Performs the Advanced GET operation
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Requires Eventing Storage (or a metadata collection) and a source collection
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Requires a binding of type
bucket alias -
Operates on any mutation where
doc.type === "test_adv_get"
For more information about the Advanced Self-Recursion Parameter, see Advanced GET Operation.
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advancedGetOp
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Input data
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Output data
// Configure the settings for the advancedGetOp function as follows:
//
// Version 7.1+
// "Function Scope"
// *.* (or try bulk.data if non-privileged)
// Version 7.0+
// "Listen to Location"
// bulk.data.source
// "Eventing Storage"
// rr100.eventing.metadata
// Binding(s)
// 1. "binding type", "alias name...", "bucket.scope.collection", "Access"
// "bucket alias", "src_col", "bulk.data.source", "read and write"
//
// Version 6.6.1
// "Source Bucket"
// source
// "MetaData Bucket"
// metadata
// Binding(s)
// 1. "binding type", "alias name...", "bucket", "Access"
// "bucket alias", "src_col", "source", "read and write"
function OnUpdate(doc, meta) {
// filter out non-intersting documents
if (!doc.type || doc.type !== "test_adv_get") return;
log('input doc ', doc);
log('input meta', meta);
// let's read the same item and then try to read a non existent item
var meta_ary = [{"id":"test_adv_get::1"}, {"id":"not_present::1"}];
for (var i = 0; i < meta_ary.length; i++) {
var result = couchbase.get(src_col,meta_ary[i]);
if (result.success) {
log('success adv. get: result',result);
} else {
log('failure adv. get: id',meta_ary[i].id,'result',result);
}
}
}INPUT: KEY test_adv_get::1
{
"id": 1,
"type": "test_adv_get"
}2021-01-07T07:57:24.706-08:00 [INFO] "input doc "
{
"id": 1,
"type": "test_adv_get"
}
2021-01-07T07:57:24.706-08:00 [INFO] "input meta"
{
"cas": "1610034762747412480",
"id": "test_adv_get::1",
"expiration": 0,
"flags": 33554438,
"vb": 324,
"seq": 1
}
2021-01-07T07:57:24.707-08:00 [INFO] "success adv. get: result"
{
"doc": {
"id": 1,
"type": "test_adv_get"
},
"meta": {
"id": "test_adv_get::1",
"cas": "1610034762747412480",
"data_type": "json"
},
"success": true
}
2021-01-07T07:57:24.707-08:00 [INFO] "failure adv. get: id" "not_present::1" "result"
{
"error": {
"code": 272,
"name": "LCB_KEY_ENOENT",
"desc": "The document key does not exist on the server",
"key_not_found": true
},
"success": false
}