Space in Key for Custom JSON Object ?

[Benjamin Habié]

I can't figure out how to declare a key in my custom JSON object with spaces in the name:

> aws ec2 describe-instances --query "Reservations[].Instances[].{Name: Tags[?Key == 'Name'].Value | [0], Id: InstanceId, State: State.Name, 'Public IP': PublicIpAddress, Type: InstanceType}" --output table

Bad value for --query Reservations[].Instances[].{Name: Tags[?Key == 'Name'].Value | [0], Id: InstanceId, State: State.Name, 'Public IP': PublicIpAddress, Type: InstanceType}: Expecting: ['quoted_identifier', 'unquoted_identifier'], got: literal: Parse error at column 103, token "Public IP" (LITERAL), for expression:
"Reservations[].Instances[].{Name: Tags[?Key == 'Name'].Value | [0], Id: InstanceId, State: State.Name, 'Public IP': PublicIpAddress, Type: InstanceType}"

Absolutely nothing to be found online about this, as all threads in search results deal with spaces in keys from the object we're querying from, not the object we're creating.

I have tried with backticks, single quotes, double quotes, escaped single & double quotes, quoted quotes, etc... nothing seems to work.

[Antonio Zaitoun]

Double quotes is the right way to go about this, however this seems like an issue with the AWS cli rather than the JMESPath libraries.

This works just fine:

{ "public ip": @.my.object }

[James Saryerwinnie]

Yep, it's double quotes for keys with spaces in them (anything that doesn't qualify as a unquoted idenfitifer), and for CLI you'll need to make sure you're escaping the quotes in your shell. A quick way to double check the quoting is to prefix the command with echo, which will show you how the value the CLI receives. Note the escaped \" here:

~ $ echo aws ec2 describe-instances --query "Reservations[].Instances[].{Name: Tags[?Key == 'Name'].Value | [0], Id: InstanceId, State: State.Name, \"Public IP\": PublicIpAddress, Type: InstanceType}" --output table

aws ec2 describe-instances --query Reservations[].Instances[].{Name: Tags[?Key == 'Name'].Value | [0], Id: InstanceId, State: State.Name, "Public IP": PublicIpAddress, Type: InstanceType} --output table