Filter by value

To filter for values in jq the select function can be used in combination with contains. The contains(arg) function will return true if the input completely contains the provided argument.

json='[{ "id": "foo" }, { "id": "bar" }, { "id": "baz" }]'

echo $json | jq -c '.[] | select(.id | contains("ba"))'

# {"id":"bar"}
# {"id":"baz"}

Or use == when an exact match is required

json='[{ "id": "foo" }, { "id": "bar" }, { "id": "baz" }]'

echo $json | jq -c '.[] | select(.id == "baz")'

# {"id":"baz"}