Creating a single json from a combined json list - mule

Question

I am getting multiple json files in a for loop and each json in each loop are in a format :
{
"myproperties": {
"http.port": "8088",
"http.base": "/abc",
"http.path": "test"
},
"information": [{
"abc": {
"key1": "ghghghghgh"
},
"efg": {
"key1": "value1"
}
}]
}
and
{
"myproperties": {
"http.port": "6789",
"db.base": "tat",
"db.path": "ghghghg"
},
"information": [{
"efg": {
"key1": "ghghghghgh"
},
"ijk": {
"key1": "value1"
}
}]
}
and so on ……….
I manage to combine all the json in a list out side the for loop and the combine json list looks like:
[{
"myproperties": {
"http.port": "8088",
"http.base": "/abc",
"http.path": "test"
},
"information": [{
"abc": {
"key1": "ghghghghgh"
},
"efg": {
"key1": "value1"
}
}]
},
{
"myproperties": {
"http.port": "6789",
"db.base": "tat",
"db.path": "ghghghg"
},
"information": [{
"efg": {
"key1": "ghghghghgh"
},
"ijk": {
"key1": "value1"
}
}]
}]
Now I want to make **single** json output out of this combine json something in a following format:
{
"myproperties": {
"http.port": "6789",
"db.base": "tat",
"db.path": "ghghghg",
"http.base": "/abc",
"http.path": "test"
},
"information": [{
"efg": {
"key1": "ghghghghgh"
},
"ijk": {
"key1": "value1"
}
},
{
"abc": {
"key1": "ghghghghgh"
},
"efg": {
"key1": "value1"
}
}
]
}
please note in the myproperties section only unique and distinct node is there.
I am not sure how to begin this with dataweave… any pointer will be appreciated,
I tried the following :
%dw 1.0
%output application/json skipNullOn="everywhere",encoding="UTF-8"
---
payload map {
myproperties: $.myproperties,
information: $.information
}
But not working
Thanks

Answer 1

Try mapObject for combining properties and flatten for changing information array to single array like
%dw 1.0
%output application/json
---
{
myproperties : payload.myproperties mapObject $ ,
information : (flatten payload.information)
}
HTH
Update:-
For distinct properties you have to get distinct properties first and then map all distinct properties. But you may loose duplicate properties. refer below
%dw 1.0
%output application/json
%var distinctProperties =((payload.myproperties mapObject $) pluck $$) distinctBy $
%var aggregatedPropertiesMap = (payload.myproperties mapObject $)
---
{
myproperties : {( distinctProperties map { // interate over distinct properties
($) : aggregatedPropertiesMap[$] // map property as key and fetch its value from aggregatedPropertiesMap
})} ,
information : (flatten payload.information)
}