Trying to flatten a JSON file to CSV in UNIX but getting an error message. Any help here to get the contents copied to CSV will be appreciated:
Command:
cat Filename.json | jq --raw-output '._data.data[] | [.Date, .Object, .ID, .Name ] | #csv' > /home/Filename.csv
Error:
jq: error: Cannot iterate over null
cat Filename.json | sed 1d | sed 's/},/}/' | jq --raw-output '. | [.Date, .Object, .ID, .Name ] | #csv'
Related
It seems that jq's "select", when used with variables, only works for text strings, but not for numbers.
How do I use jq so that I can select no matter if the value is a number or not?
$ cat test.json
[
{
"id": "some-text",
"output": "jq select works!"
},
{
"id": 123,
"output": "jq select doesn't work :("
}
]
Let's try to select "output" where "id" is "some-text" - it works:
$ ID="some-text"
$ cat test.json | jq -r --arg ID "$ID" '.[] | select(.id==$ID) | .output'
jq select works!
$
Let's try to select "output" where "id" is "123" - it doesn't work:
$ ID="123"
$ cat test.json | jq -r --arg ID "$ID" '.[] | select(.id==$ID) | .output'
$
Interestingly, "select" does work if I don't pass the variable via --arg:
$ cat test.json | jq -r '.[] | select(.id==123) | .output'
jq select doesn't work :(
What am I doing wrong?
You can use --argjson instead off -arg to let JQ handle it as a number:
➜ ID="123"
➜ cat test.json | jq -r --argjson ID "$ID" '.[] | select(.id==$ID) | .output'
jq select doesn't work :(
➜
You could also use tostring to convert the ID to a string so you can keep the existing format;
➜ ID="123"
➜ cat test.json | jq -r --arg ID "$ID" '.[] | select(.id|tostring==$ID) | .output'
jq select doesn't work :(
➜
➜ ID="some-text"
➜ cat test.json | jq -r --arg ID "$ID" '.[] | select(.id|tostring==$ID) | .output'
jq select works!
➜
How can I combine this with jq? Both work independently but I can't make them work together:
jq '.objects[].addresses[] | .id, .ipValue.ipStr, .hostName'
jq '.objects[] | .id, .name'
This does not work:
jq '.objects[] | .id, .name, .addresses[] | .id, .ipValue.ipStr, .hostName'
In other words, print the .id., .name, and iterate over addresses array and print .id, .ipValue.ipStr and .hostName??
You were close, pipe operator has a higher precedence than comma operator.
.objects[] | .id, .name, (.adresses[] | .id, .ipValue.ipStr, .hostName)
It looks like you're looking for something along the lines of:
jq -r '.objects[]
| [.id, .name] + (.addresses[] | [.id, .ipValue.ipStr, .hostName])
| #csv'
I have an aws query that I want to filter in jq.
I want to filter all the imageTags that don't end with "latest"
So far I did this but it filters things containing "latest" while I want to filter things not containing "latest" (or not ending with "latest")
aws ecr describe-images --repository-name <repo> --output json | jq '.[]' | jq '.[]' | jq "select ((.imagePushedAt < 14893094695) and (.imageTags[] | contains(\"latest\")))"
Thanks
You can use not to reverse the logic
(.imageTags[] | contains(\"latest\") | not)
Also, I'd imagine you can simplify your pipeline into a single jq call.
All you have to do is | not within your jq
A useful example, in particular for mac brew users:
List all bottled formulae
by querying the JSON and parsing the output
brew info --json=v1 --installed | jq -r 'map(
select(.installed[].poured_from_bottle)|.name) | unique | .[]' | tr '\n' ' '
List all non-bottled formulae
by querying the JSON and parsing the output and using | not
brew info --json=v1 --installed | jq -r 'map(
select(.installed[].poured_from_bottle | not) | .name) | unique | .[]'
In this case contains() doesn't work properly, is better use the not of index() function
select(.imageTags | index("latest") | not)
This .[] | .[] can be shorten to .[][] e.g.,
$ jq --null-input '[[1,2],[3,4]] | .[] | .[]'
1
2
3
4
$ jq --null-input '[[1,2],[3,4]] | .[][]'
1
2
3
4
To check whether a string does not contain another string, you can combine contains and not e.g.,
$ jq --null-input '"foobar" | contains("foo") | not'
false
$ jq --null-input '"barbaz" | contains("foo") | not'
true
You can do something similar with an array of strings with either any or all e.g.,
$ jq --null-input '["foobar","barbaz"] | any(.[]; contains("foo"))'
true
$ jq --null-input '["foobar","barbaz"] | any(.[]; contains("qux"))'
false
$ jq --null-input '["foobar","barbaz"] | all(.[]; contains("ba"))'
true
$ jq --null-input '["foobar","barbaz"] | all(.[]; contains("qux"))'
false
Say you had file.json:
[ [["foo", "foo"],["foo", "bat"]]
, [["foo", "bar"],["foo", "bat"]]
, [["foo", "baz"],["foo", "bat"]]
]
And you only want to keep the nested arrays that don't have any strings with "ba":
$ jq --compact-output '.[][] | select(all(.[]; contains("bat") | not))' file.json
["foo","foo"]
["foo","bar"]
["foo","baz"]
I need to get some values from a json file with JQ. I need to get a csv (Time, Data.key, Lat, Lng, Qline)
Input:
{
"Time":"14:16:23",
"Data":{
"101043":{
"Lat":49,
"Lng":15,
"Qline":420
},
"101044":{
"Lat":48,
"Lng":15,
"Qline":421
}
}
}
Example output of csv:
"14:16:23", 101043, 49, 15, 420
"14:16:23", 101044, 48, 15, 421
Thanks a lot.
I tried only to:
cat test.json | jq '.Data[] |[ .Lat, .Lng, .Qline ] | #csv'
Try this:
{ Time } + (.Data | to_entries[] | { key: .key | tonumber } + .value)
| [ .Time, .key, .Lat, .Lng, .Qline ]
| #csv
Make sure you get the raw output by using the -r switch.
Here's another solution that doesn't involve the +'s.
{Time, Data: (.Data | to_entries)[]}
| [.Time, (.Data.key | tonumber), .Data.value.Lat, .Data.value.Lng, .Data.value.Qline]
| #csv
Here is another solution. If data.json contains the sample data then
jq -M -r '(.Data|keys[]) as $k | {Time,k:$k}+.Data[$k] | [.[]] | #csv' data.json
will produce
"14:16:23","101043",49,15,420
"14:16:23","101044",48,15,421
I have this command that is working..
cat ~/Desktop/results.json | jq '.[] | .environmentStatuses[].deploymentResult | select(.key.entityKey.key=="39583746-39747586") | .lifeCycleState '
I want to pass the entity key as variable , tried the below ones ,but none seems to work-
enkey="39583746-39747586"
cat ~/Desktop/results.json | jq '.[] | .environmentStatuses[].deploymentResult | select(.key.entityKey.key=="""${enkey}""") | .lifeCycleState '
cat ~/Desktop/results.json | jq '.[] | .environmentStatuses[].deploymentResult | select(.key.entityKey.key=="${enkey}") | .lifeCycleState '
When trying to use extra parameters in your filters, use the --arg option to pass them in. Don't rely on the shell to insert it into your filter string, keep that separate.
jq --arg key "$enkey" '.[] |
.environmentStatuses[].deploymentResult |
select(.key.entityKey.key == $key) |
.lifeCycleState' ~/Desktop/results.json
This worked for me :
jq '.[] | .environmentStatuses[].deploymentResult |
select(.key.entityKey.key == "'$key'") |
.lifeCycleState' ~/Desktop/results.json
--arg does not works as expected ...