IF I have json that looks like
{
"items": [
{
"name": "issue1",
"spec": {
"config": {
"setting1": abc,
"setting2": {
"name": "xyz"
}
},
"files": {
"name": "cde",
"path": "/home"
},
"program": {
"name": "apache"
}
}
}
]
}
and I want to have iteration at .items[0].spec where the key config,files,program's contents can be shown.. something like
config:
{
"setting1": abc,
"setting2": {
"name": "xyz"
}
}
files:
{
"name": "cde",
"path": "/home"
}
program:
{
"name": "apache"
}
and there might be things more or less than config/files/programs for each items.
I know that I can get the list of keys by jq -r '.items[0].spec| to_entries[].key' but not sure about formating the output and getting the contents of .items[].spec.xxxxx like above.
I also got very close by jq -r '{test: .items[0].spec | with_entries(select(.value != null)) }' but I want to seperate each item per key
Also this got me even closer! but how do you get the json syntax of the object to display uncompressed?
jq -r '.items[].spec | keys[] as $k | "\($k):\n \(.[$k])"'
The "," operator is the magic ingredient you seem to be looking for:
.items[].spec | keys[] as $k | $k, .[$k]
Related
I want to transform JSON data using jq filter
Json data:
{
"main": [
{
"firstKey": "ABCD",
"id": "12345",
"data": [
{
"name": "first_id",
"value": "first_id_value"
},
{
"name": "second_id",
"value": "second_id_value"
},
{
"name": "third_id",
"value": "third_id_value"
}
]
}
]
}
Expected OUTPUT:
{
"firstKey": "ABCD",
"id": "12345",
"data.name.first_id": "first_id_value",
"data.name.second_id": "second_id_value",
"data.name.third_id": "third_id_value"
}
After many trials and errors, I was near to expected output using following filter expression
[.main[]|{"firstKey", "id"},foreach .data[] as $item (0; "data.name.\($item.name)" as $a|$item.value as $b| {($a): $b})][]
Used foreach as objects under "data" are dynamic. the number of objects can differ.
The output for the above expression is:
{
"firstKey": "ABCD",
"id": "12345"
}
{
"data.name.first_id": "first_id_value"
}
{
"data.name.second_id": "second_id_value"
}
{
"data.name.third_id": "third_id_value"
}
But I want the objects of data to be under the same braces as 'firstKey' and 'id'.
LINK to JqPlay
Any suggestions will be helpful.
Since your structure is so rigid, you can cheat and use the built-in from_entries, which takes a list of {key, value} pairs and constructs an object:
.main[] |
{firstKey, id} +
(.data | map({key: "data.name.\(.name)", value}) |
from_entries)
I am trying to get key#value pairs of JSON file below using jq
{
"STUFF_RELATED1": "STUFF_RELATED1",
"STUFF_RELATED2": "STUFF_RELATED2",
"THINGS": {
"THING_2": {
"details": {
"stuff_branch": "user/dev"
},
"repository": "path/to/repo",
"branch": "master",
"revision": "dsfkes4s34jlis4jsj4lis4sli3"
},
"THING_1": {
"details": {
"stuff_branch": "master"
},
"repository": "path/to/repo",
"branch": "master",
"revision": "dsfkes4s34jlis4jsj4lis4sli3"
}
},
"STUFF": {
"revision": "4u324i324iy32g",
"branch": "master"
}
}
The key#value pair should look like this:
THING_1#dsfkes4s34jlis4jsj4lis4sli3
Currently I have tried this on my own:
jq -r ' .THINGS | keys[] as $k | "($k)#(.[$k].revision)" ' things.json
But it does not give the resul that I really want.:( Thanks in advance!
You need to escape ( :
jq -r ' .THINGS | keys[] as $k | "\($k)#\(.[$k].revision)" ' things.json
I have two JSON files a.json and b.json. The contents in a.json file is a JSON object and inside b.json its an array.I want to add/update status field in each mappings in a.json by retrieving the value from b.json file.
a.json:
{
"title": 25886,
"data": {
"request": {
"c": 46369,
"t1": 1562050127.376641
},
},
"rs": {
"mappings": {
"12345": {
"id": "12345",
"name": "test",
"customer_id": "11228",
},
"45678": {
"id": "45678",
"name": "abc",
"customer_id": "11206",
}
}
}}
b.json:
[
{
"status": "pending",
"extra": {
"name": "test"
},
"enabled": true,
"id": "12345"
},
{
"status": "not_started",
"extra": {
"name": "abc"
},
"enabled": true,
"id": "45678"
}
]
Below is my expected output:
{
"title": 25886,
"data": {
"request": {
"c": 46369,
"t1": 1562050127.376641
},
},
"rs": {
"mappings": {
"12345": {
"id": "12345",
"name": "test",
"customer_id": "11228",
"status":"pending"
},
"45678": {
"id": "45678",
"name": "abc",
"customer_id": "11206",
"status":"not_started"
}
}
}}
In this expected JSON file we have status field whose value is retrieved from b.json file based on a matching id value. How to do this using jq ?
For the purposes of this problem, b.json essentially defines a dictionary, so for simplicity, efficiency and perhaps elegance,
it make sense to start by using the builtin function INDEX to create the relevant dictionary:
INDEX( $b[] | {id, status}; .id )
This assumes an invocation of jq along the lines of:
jq --argfile b b.json -f update.jq a.json
(Yes, I know --argfile has been deprecated. Feel free to choose another way to set $b to the contents of b.json.)
Now, to perform the update, it will be simplest to use the "update" operator, |=, in conjunction with map_values. (Feel free to check the jq manual :-)
Putting everything together:
INDEX( $b[] | {id, status}; .id ) as $dict
| .rs.mappings |= map_values( .status = $dict[.id].status )
In case, I have an original json look like the following:
{
"taskDefinition": {
"containerDefinitions": [
{
"name": "web",
"image": "my-image",
"environment": [
{
"name": "DB_HOST",
"value": "localhost"
},
{
"name": "DB_USERNAME",
"value": "user"
}
]
}
]
}
}
And I would like to inplace modify the value for the matched key like so:
jq '.taskDefinition.containerDefinitions[0].environment[] | select(.name=="DB_USERNAME") | .value="new"' json
I got the output
{
"name": "DB_USERNAME",
"value": "new"
}
But I want more like in-place modify or the whole json from the original with new value modified, like this:
{
"taskDefinition": {
"containerDefinitions": [
{
"name": "web",
"image": "my-image",
"environment": [
{
"name": "DB_HOST",
"value": "localhost"
},
{
"name": "DB_USERNAME",
"value": "new"
}
]
}
]
}
}
Is it possible to do with jq or any known workaround?
Thank you.
Updated
For anyone looking for editing multi-values,
here is the approach I use
JQ=""
for e in DB_HOST=rds DB_USERNAME=xxx; do
k=${e%=*}
v=${e##*=}
JQ+="(.taskDefinition.containerDefinitions[0].environment[] | select(.name==\"$k\") | .value) |= \"$v\" | "
done
jq '${JQ%??}' json
I think there should be more concise way, but this seems working fine.
It is enough to assign to the path, if you are using |=, e.g.
jq '
(.taskDefinition.containerDefinitions[0].environment[] |
select(.name=="DB_USERNAME") | .value) |= "new"
' infile.json
Output:
{
"taskDefinition": {
"containerDefinitions": [
{
"name": "web",
"image": "my-image",
"environment": [
{
"name": "DB_HOST",
"value": "localhost"
},
{
"name": "DB_USERNAME",
"value": "new"
}
]
}
]
}
}
Here is a select-free solution using |=:
.taskDefinition.containerDefinitions[0].environment |=
map(if .name=="DB_USERNAME" then .value = "new"
else . end)
Avoiding select within the expression on the LHS of |= makes the solution more robust w.r.t. the version of jq being used.
You might like to consider this alternative to using |=:
walk( if type=="object" and .name=="DB_USERNAME"
then .value="new" else . end)
Hi I have the below JSON file with nested object:
{
"Maps": {
"Campus": [
{
"name": "nus",
"Building": [
{
"name": "sde1",
"Floor": [
{
"name": "floor1"
},
{
"name": "floor2"
}
]
},
{
"name": "sde2"
}
]
},
{
"name": "ntu",
"Building": [
{
"name": "ece1",
"Floor": [
{
"name": "floor1"
},
{
"name": "floor2"
}
]
},
{
"name": "ece2"
}
]
}
]
}
}
I want to use jq to parse the above JSON file and get the below format:
nus>sde1>floor1
nus>sde1>floor2
ntu>ece1>floor1
ntu>ece1>floor2
basically I have to concatenate the Campus Name with Building Name and Floor name and put a < symbol in between.
If the nested object field Floor is not exist, ignore the parse and continue the next child object.
How to achieve that? thanks.
You can use the following jq command:
jq '.Maps.Campus[]|"\(.name)>\(.Building[]|"\(.name)>\(.Floor[]?.name)")"' file.json
jq is smart enough to print the combinations of .name and .Building[].name since .Building is an array. The same action get's applied to .Building[].name and Floor[]?.name. ? because floor is not always set.
Here is a solution which uses jq variables
.Maps.Campus[]
| .name as $campus
| .Building[]
| .name as $bldg
| .Floor[]?
| .name as $floor
| "\($campus)>\($bldg)>\($floor)"