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pbandjay
pbandjay

Reputation: 3

jq: change multiple values within a select object

I have an array of JSON objects, and I am trying change the name and version on the object of a given @type, with the following input

[
 {
    "name": "oldname",
    "version": "oldversion",
    "@type": "Project"
 },
 {
    "name": "bomname",
    "version": "bomversion",
    "@type": "BOM"
 },
 {
    "name": "componentname",
    "version": "componentversion",
    "@type": "Component"
 }
]

I found many examples for changing a single value, and I can successfully do this by chaining multiple select statements together. 

$ cat original.json | jq '[ .[] | (select(.["@type"] == "Project") | .name ) = "newname" | (select(.["@type"] == "Project") | .version ) = "newversion ] ' > renamed.json

But I was hoping I could condense this so I only have perform the select once to change both values.

Upvotes: 0

Views: 2117

Answers (2)

Jeff Mercado
Jeff Mercado

Reputation: 134881

Merge an object with the new values.

map(select(.["@type"] == "Project") * {name: "newname", version: "newversion"} // .)

Upvotes: 1

peak
peak

Reputation: 116750

Using your approach:

[ .[]
  | if .["@type"] == "Project" 
    then .name = "newname" | .version  = "newversion" 
    else . end ]

or if you want to use select, you could write:

map( (select(.["@type"] == "Project") | .name = "newname" | .version  = "newversion" ) // .)

or more exotically:

(.[] | select(["@type"] == "Project"))
|= (.name = "newname" | .version  = "newversion" )

Upvotes: 2

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