JQ output not correctly assinging to variable

Question

Below jq query output comes correctly.

ROUTE_ID= jq -r '.[][]? | select(.pattern? == "*test.com/testcards/email/*").id' route.json

route.json file contains a json output.

But echo "this is route $ROUTE_ID" or echo "this is route $ROUTE_ID does not return value for $ROUTE_ID"

your code is not valid. You probably mean `route_id=$(jq ... )`. You can use shellcheck.net to debug your script — Aserre, May 16 '22 at 15:20
@Aserre Acually the code is valid. Shellcheck emits a warning, but it's valid. — Andreas Louv, May 16 '22 at 15:34

score 1 · Accepted Answer · edited May 16 '22 at 15:37

What you are currently doing is setting the environment variable ROUTE_ID to nothing for the execution of jq, eg:

MY_ENV=abc command

Will set the environment variable "MY_ENV" to "abc" for the execution of command.

What you want to do is store the output of your command a variable, for this you'll need to use command substitutions:

my_var=$(command)

In your case:

route_id=$(jq -r '.[][]? | select(.pattern? == "test.com/testcards/email/").id' route.json)

Nitpicking; use lowercase variable names when possible, as UPPER_CASE are "reserved" for exported environment variables.

1 Answers1