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2074 :: json problem

• DarkBlue (orginal) [2016-02-27T05:04:31+01:00] view original

  import json,strfmt
  
  let jz:JsonNode =  parseJson("""{"lat":37.7898,"status":"success","countryCode":"US","city":"San Francisco","country":"United States"}""")
  echo jz
  echo jz.len
  echo jz.getFields()
  for x in jz.getFields():
       echo "{:<15} : {}".fmt($x.key,$x.val)
  
  Run

  This fails with

  qq13.nim(8, 8) template/generic instantiation from here
  lib/system.nim(2301, 19) Error: undeclared field: 'data'
  Run

  on latest dev:

  Nim Compiler Version 0.13.1 (2016-02-27) [Linux: amd64]
  Copyright (c) 2006-2016 by Andreas Rumpf
  
  git hash: 6d2fd0c9f17016ee9ae5f8c337445ff958cba2f0
  active boot switches: -d:release
  Run

  What did I do wrong ?

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• RPG (orginal) [2016-02-27T07:13:24+01:00] view original

  Works with 0.13. Likely because of this: https://github.com/nim-lang/Nim/pull/3810

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• DarkBlue (orginal) [2016-02-27T07:37:45+01:00] view original

  Thank you for the tip.

  Yes it must have to do with this pull.

  If I use mpairs instead of getFields:

  import json,strfmt
  
  var jz:JsonNode =  parseJson("""{"lat":37.7898,"status":"success","countryCode":"US","city":"San Francisco","country":"United States"}""")
  
  echo jz
  echo jz.len
  
  echo()
  
  for x in mpairs(jz): echo x
  
  echo()
  
  for x in jz.mpairs(): echo "{:<15} : {}".fmt($x.key,$x.val)
  
  Run

  then it compiles again.

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• def (orginal) [2016-02-27T14:19:43+01:00] view original

  That happens because getFields now returns a Table and $ from tables is not imported, works like this:

  import json, strfmt, tables
  
  let jz:JsonNode =  parseJson("""{"lat":37.7898,"status":"success","countryCode":"US","city":"San Francisco","country":"United States"}""")
  echo jz
  echo jz.len
  echo jz.getFields()
  for key, val in jz.getFields():
       echo "{:<15} : {}".fmt($key,$val)
  Run

  We should probably look into re-exporting useful procs like that.

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