Merge two arrays and overwrite values | Dataweave - arrays

Question

I have situation to merge global array with another custom array or if the name is the same use custom values.
Global:
{
"connections": [
{
"name": "Test SFTP",
"type": "SFTP",
"user": "sftpuser",
"password": "password",
"server": "127.0.0.1",
"port": 22,
},
{
"name": "Test FTP",
"type": "FTP",
"user": "ftpuser",
"password": "password",
"server": "127.0.0.1",
"port": 21,
}
]
}
Custom:
{
"connections": [
{
"name": "Test SFTP",
"user": "sftpuser1",
"password": "password1",
"server": "127.0.0.2",
},
{
"name": "Test FTPS",
"type": "FTPS",
"user": "ftpsuser",
"password": "password",
"server": "127.0.0.1",
"port": 990,
}
]
}
Expected:
{
"connections": [
{
"name": "Test SFTP",
"type": "SFTP",
"user": "sftpuser1",
"password": "password1",
"server": "127.0.0.2",
"port": 22,
},
{
"name": "Test FTP",
"type": "FTP",
"user": "ftpuser",
"password": "password",
"server": "127.0.0.1",
"port": 21,
},
{
"name": "Test FTPS",
"type": "FTPS",
"user": "ftpsuser",
"password": "password",
"server": "127.0.0.1",
"port": 990,
}
]
}
Global will always have all fields but custom can have name + just one field to override global.
Later on I will validate if the json is ok but for now i just need to merge and overwrite.
Thanks,
Ivan

Answer 1

Below script will help you.
%dw 2.0
output application/json
import mergeWith from dw::core::Objects
import * from dw::core::Arrays
var global = {
"connections": [
{
"name": "Test SFTP",
"type": "SFTP",
"user": "sftpuser",
"password": "password",
"server": "127.0.0.1",
"port": 22,
},
{
"name": "Test FTP",
"type": "FTP",
"user": "ftpuser",
"password": "password",
"server": "127.0.0.1",
"port": 21,
}
]
}
var custom = {
"connections": [
{
"name": "Test SFTP",
"user": "sftpuser1",
"password": "password1",
"server": "127.0.0.2",
},
{
"name": "Test FTPS",
"type": "FTPS",
"user": "ftpsuser",
"password": "password",
"server": "127.0.0.1",
"port": 990,
}
]
}
---
outerJoin(global.connections, custom.connections, (g) -> g.name, (c) -> c.name) map ($.l mergeWith $.r )