%dw 2.0
var dropThese = [
{"type" : "secondary", "space" : "rgb"},
{"type" : "primary", "space" : "cmyk"}
]
output application/json
---
payload filter (not (dropThese contains {"type": $."type", "space": $."space"}))
Remove Objects Containing Specified Key-Value Pairs
This DataWeave example removes all objects that contain a set of key-value pairs from an array of objects. Before you begin, note that 2.x versions of DataWeave are used by Mule 4 apps. For DataWeave in Mule 3 apps, refer to DataWeave version 1.2 examples. For other DataWeave versions, you can use the version selector in the DataWeave table of contents.
This example uses the following functions:
-
filter
iterates over the objects within the input array to return an array with the objects that returntrue
as the result of an expression. Each object in the input array contains a set of key-value pairs. The expression uses thecontains
function and thenot
operator. -
contains
identifies the key-value pairs specified in thedropThese
variable. This variable is an array of objects containing the key-value pairs to remove.not
negates the result of thecontains
function to makefilter
remove the key-value pairs identified indropThese
from the final output. (Withoutnot
, the result is an array of objects containing only the undesired key-value pairs.)
[
{"sequence": "1", "color": "red", "type": "primary", "space": "rgb"},
{"sequence": "2", "color": "green", "type": "primary", "space": "rgb"},
{"sequence": "3", "color": "blue", "type": "primary", "space": "rgb"},
{"sequence": "4", "color": "yellow", "type": "secondary", "space": "rgb"},
{"sequence": "5", "color": "magenta", "type": "secondary", "space": "rgb"},
{"sequence": "6", "color": "cyan", "type": "secondary", "space": "rgb"},
{"sequence": "7", "color": "cyan", "type": "primary", "space": "cmyk"},
{"sequence": "8", "color": "magenta", "type": "primary", "space": "cmyk"},
{"sequence": "9", "color": "yellow", "type": "primary", "space": "cmyk"},
{"sequence": "10", "color": "red", "type": "secondary", "space": "cmyk"},
{"sequence": "11", "color": "green", "type": "secondary", "space": "cmyk"},
{"sequence": "12", "color": "blue", "type": "secondary", "space": "cmyk"}
]
[
{
"sequence": "1",
"color": "red",
"type": "primary",
"space": "rgb"
},
{
"sequence": "2",
"color": "green",
"type": "primary",
"space": "rgb"
},
{
"sequence": "3",
"color": "blue",
"type": "primary",
"space": "rgb"
},
{
"sequence": "10",
"color": "red",
"type": "secondary",
"space": "cmyk"
},
{
"sequence": "11",
"color": "green",
"type": "secondary",
"space": "cmyk"
},
{
"sequence": "12",
"color": "blue",
"type": "secondary",
"space": "cmyk"
}
]