Parsing multiple json values in linux jq [duplicate] - json

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Closed 5 years ago.
I have json string like this:
jstring='[{"userQuery":"select name from abc;","user":"abc"},{"userQuery":"select name from xyz;","user":"xyz"},{"userQuery":"select name from ppp;","user":"ppp"}]'
I wrote a simple for loop using jq to extract values but not getting the desired result.
for i in `echo $jstring | jq '.[] | [.user, .userQuery]'`; do echo ${i}; done
With the help of this line : echo $jstring | jq '.[] | [.user, .userQuery]'. I am able to extract below info:
[ "abc", "select name from abc;"][ "xyz", "select name from xyz;"][ "ppp", "select name from ppp;"]
Now, I want two variable "user" & "query" for each array and store that info.
Eg: For [ "abc", "select name from abc;"] -- user: abc, query: "select name from abc" and store them.
I am not sure how to iterate over json using jq and get individual values and store them.

Answer 1

I assume you mean you want to store them as shell variables. With bash you can write:
while read -r user query; do
echo "user->$user"
echo "query->$query"
done < <( jq -r '.[] | "\(.user) \(.userQuery)"' <<< "$jstring" )
user->abc
query->select name from abc;
user->xyz
query->select name from xyz;
user->ppp
query->select name from ppp;
The secret sauce is in the formulation of the string inside jq that refers to the object properties with \(.user)
I'm assuming that the user name does not contain spaces. Otherwise we have to use a different separator in that string, and use IFS with the shell read command.

Answer 2

jq + bash solution:
#!/bin/bash
jstring='[{"userQuery":"select name from abc;","user":"abc"},{"userQuery":"select name from xyz;","user":"xyz"},{"userQuery":"select name from ppp;","user":"ppp"}]'
while IFS=$'\t' read -r user query; do
msg="User: ${user} is running : ${query}"
mail -s "User query" "youremail#gmail.com" <<< "$msg"
done < <(jq '.[] | [.user,.userQuery] | #tsv' <<< "$jstring")