json - jq - add new field with updating whole file -

i have json file constructed in simmilar way:

[ { "_id":"1234", "org":"org1", "int":     {"url":"http://url.com.uk:1234"}}, { "_id":"4321", "org":"org2", "int":     {"url":"http://url.com.us:4321"}}, ... ] 

now im "jumping" 1 entry , checking if under url application working properly. after check want add/update field "status". can't update whole file, im getting:

$ jq --arg mod "good" '.[0].int + {stat: $mod}' tmp.json {   "url": "http://url.com.uk:1234",   "stat": "good" } 

how can jq command new updated whole file, not part of it?

if put data in data.json , changes want make each record separate arg.json argument file like

{     "1234": { "int": { "stat": "good" } },     "4321": { "int": { "stat": "bad", "xxx": "yyy" } } } 

and run jq as

$ jq -m --argfile arg arg.json 'map(. + $arg[._id])' data.json 

then output updated data, e.g.

[   {     "_id": "1234",     "org": "org1",     "int": {       "stat": "good"     }   },   {     "_id": "4321",     "org": "org2",     "int": {       "stat": "bad",       "xxx": "yyy"     }   } ] 

note + replaces keys. if want merge keys can use * e.g.

$ jq -m --argfile arg arg.json 'map(. * $arg[._id])' data.json  

which generates

[   {     "_id": "1234",     "org": "org1",     "int": {       "url": "http://url.com.uk:1234",       "stat": "good"     }   },   {     "_id": "4321",     "org": "org2",     "int": {       "url": "http://url.com.us:4321",       "stat": "bad",       "xxx": "yyy"     }   } ] 

if want update data in place use sponge described in answer manipulate json jq e.g.

$ jq -m --argfile arg arg.json 'map(. * $arg[._id])' data.json | sponge data.json 

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