mule filter logic processing in dataweave - mule

Question

I have a Json payload i.e.
{
"Numbers": [
0
],
"title": "string",
"Ids": [
0, 1, 2
],
"group": 0
}
and I am hitting a http call to get collection of records for all customers present in DB i.e.
{
"details": [{
"detailId": 0,
"Id": 0,
"name": "string",
"place": "string",
"country": "string",
"bloodgroup": "string",
"area": "string"
},
{
"detailId": 0,
"Id": 1,
"name": "string",
"place": "string",
"country": "string",
"bloodgroup": "string",
"area": "string"
}
]
}
Now I want to filter and extract the data for those Ids for which I am getting in Request payload in Ids field and match them in collection response payload.
ID field is common in Request payload and in Response payload
Please help me on this.

Answer 1

Let's assume you're storing the first payload in a variable called flowVars.ids. You want to use the contains method, which works returns true if the value you're checking is contained in the array, otherwise it returns false. Here's a couple examples:
// Returns true
[1,2,3,4,5] contains 5
// Returns false
[1,2,3,4,5] contains "Hello"
So you could structure your filter like this (assuming Mule 3.x and DataWeave 1.0):
%dw 1.0
%output application/java
%var ids = flowVars.ids.Ids
---
payload.details filter (ids contains $.Id)