json - How to reformat and transform the output of jq? -


i have json string below:

    [{         "appid": "server1",         "username": "bhavik",         "scaleapp": {             "imagename": "${data}/build-server:1",             "internalpath": "/",             "volumesfrom": [                 "${data}/buildtype-mock:219",                 "${data}/buildtype-se:543-1.0.5-v30.2-ga"             ]         }     },     {         "appid": "server2",         "username": "rajiv",         "scaleapp": {             "imagename": "${data}/build-server:159",             "internalpath": "/",             "volumesfrom": [                 "${data}/buildtype-mock:218",                 "${data}/buildtype-se:540-1.0.5-v30.1-ga",                 "${data}/buildtype-nodejs:42",                 "${data}/buildtype-flogo:682"             ]         }     } ]

i need output below:

{ "imagename" : "build-server:159", "volumesfrom" : [         "buildtype-mock:218",         "buildtype-se:540-1.0.5-v30.1-ga",         "buildtype-nodejs:42",         "buildtype-flogo:682"       ] }

i trying achieve jq. using following command:

jq '.[] | { imagename: .scaleapp.imagename,volumesfrom: .scaleapp.volumesfrom } ' data.json

following output:

{   "imagename": "${data}/build-server:159",   "volumesfrom": [         "${data}/buildtype-mock:218",         "${data}/buildtype-se:540-1.0.5-v30.1-ga",         "${data}/buildtype-nodejs:42",         "${data}/buildtype-flogo:682"       ] }

i not getting proper format want, please me out.

here solution original problem. if following filter in filter.jq

  .scaleapp | {imagename, volumesfrom} | .imagename |= .[8:] | .volumesfrom[] |= .[8:]

and following (original) sample data 

{   "appid": "server1",   "username": "bhavik",   "scaleapp": {     "imagename": "${data}/build-server:159",     "internalpath": "/",     "volumesfrom": [       "${data}/buildtype-mock:218",       "${data}/buildtype-se:540-1.0.5-v30.1-ga",       "${data}/buildtype-nodejs:42",       "${data}/buildtype-flogo:682"     ]   } }

is in data.json command

$ jq -m -f filter.jq data.json

produces

{   "imagename": "build-server:159",   "volumesfrom": [     "buildtype-mock:218",     "buildtype-se:540-1.0.5-v30.1-ga",     "buildtype-nodejs:42",     "buildtype-flogo:682"   ] }

here solution revised problem. assuming following sample data in data.json

[   {     "appid": "server1",     "username": "bhavik",     "scaleapp": {       "imagename": "${data}/build-server:1",       "internalpath": "/",       "volumesfrom": [         "${data}/buildtype-mock:219",         "${data}/buildtype-se:543-1.0.5-v30.2-ga"       ]     }   },   {     "appid": "server2",     "username": "rajiv",     "scaleapp": {       "imagename": "${data}/build-server:159",       "internalpath": "/",       "volumesfrom": [         "${data}/buildtype-mock:218",         "${data}/buildtype-se:540-1.0.5-v30.1-ga",         "${data}/buildtype-nodejs:42",         "${data}/buildtype-flogo:682"       ]     }   } ]

this filter.jq

map(         .scaleapp | {imagename, volumesfrom} | .imagename |= .[8:] | .volumesfrom[] |= .[8:] )

produces

[   {     "imagename": "build-server:1",     "volumesfrom": [       "buildtype-mock:219",       "buildtype-se:543-1.0.5-v30.2-ga"     ]   },   {     "imagename": "build-server:159",     "volumesfrom": [       "buildtype-mock:218",       "buildtype-se:540-1.0.5-v30.1-ga",       "buildtype-nodejs:42",       "buildtype-flogo:682"     ]   } ]

which little more asked filter.jq

map(          select(.appid == "server2") |  .scaleapp | {imagename, volumesfrom} | .imagename |= .[8:] | .volumesfrom[] |= .[8:] )[]

produces only

{   "imagename": "build-server:159",   "volumesfrom": [     "buildtype-mock:218",     "buildtype-se:540-1.0.5-v30.1-ga",     "buildtype-nodejs:42",     "buildtype-flogo:682"   ] }

for .appid == "server2"


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