Traversing a json to remove nulls fields using jq - json

Question

I have a JSON as follows but need a way to remove nulls before putting it into elasticsearch. Looking for a simple jq command to remove nulls that i can incorporate into my bash script unless there's a way to do this in elasticsearch
{
"master_no": {
"master_no": 100000000,
"barcode": "E00000000",
"external_key": null,
"umid": null
},
"cust_id": {
"other_cust_id": null,
"cust_reference": null,
"external_key": null,
"list_id": null,
"cust_id": null
},
"customer_name": null,
"master_desc": "test Custom Patch - test",
"barcode": "E00000000",
"container_master_no": null,
"master_status": "I",
"length": "0:00",
"format_no": {
"format_desc": null,
"external_key": null,
"format_no": null
},
"lib_master_audio": [
{
"master_no": 10000000,
"audio_channel_no": {
"audio_channel_no": 10,
"audio_channel": "1",
"external_key": null
}
},
{
"master_no": 100000000,
"audio_channel_no": {
"audio_channel_no": 10,
"audio_channel": "2",
"external_key": null
}
}
]
}
Thanks

Answer 1

This GitHub issue on remove null key and values from JSON can help you, in short, some handful of command might help you like, mentioned in this link :
del(.[][] | nulls)
Please note there are several methods of doing this, please check which one works for you.
As pointed out in comments by #oguz, Please use https://github.com/stedolan/jq/issues/104#issuecomment-289637207 which work with the latest version.