Error in json.loads

[Константин Комков]

JS

console.log('data={'+fo.slice(0,-1)+'],'+fac.slice(0,-1)+'],'+dir.slice(0,-1)+'],'+cg_id.slice(0,-1)+'],'+comp_group.slice(0,-1)+'],'+bud.slice(0,-1)+']}');

I get that json string:

JSON string (from console.log(); in google chrome)

data={"fo":["очная","очная","очная"],"fac":["Мелиорации, водного хозяйства и строительства имени А.Н.Костякова","Мелиорации, водного хозяйства и строительства имени А.Н.Костякова","Механики и энергетики имени В.П.Горячкина"],"dir":["Строительство","Гидромелиорация","Агроинженерия"],"cg_id":["6","32","29"],"comp_group":["Строительство","Гидромелиорация","Агроинженерия. Тех. системы в агробизнесе; Тех. сервис в АПК; Машины и оборудование для хран. и перераб. с.-х. продукции"],"bud":["Да","Да","Да"]}

If I do it:

jQuery.ajax({

                type: "POST",

                url: "{{=URL('useCalc','sess')}}",

                data: 'data={'+fo.slice(0,-1)+'],'+fac.slice(0,-1)+'],'+dir.slice(0,-1)+'],'+cg_id.slice(0,-1)+'],'+comp_group.slice(0,-1)+'],'+bud.slice(0,-1)+']}',

                cache: false

            });

Controller:

import json

        a = json.loads(request.vars.data)

I have error:

Ticket ID

91.210.96.2.2019-06-20.09-46-31.de5115b4-e6fb-4b0f-92dd-22ce59c495da

<class 'json.decoder.JSONDecodeError'> Unterminated string starting at: line 1 column 440 (char 439)

Версия

web2py™	Version 2.18.5-stable+timestamp.2019.04.08.04.22.03
Python	Python 3.7.3: C:\Python\python.exe (prefix: C:\Python)

Traceback

1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16.

Traceback (most recent call last): File ".\gluon\restricted.py", line 219, in restricted exec(ccode, environment) File "C:\inetpub\wwwroot\applications\application\controllers/useCalc.py", line 663, in <module> File ".\gluon\globals.py", line 421, in <lambda> self._caller = lambda f: f() File "C:\inetpub\wwwroot\applications\application\controllers/useCalc.py", line 642, in sess a = json.loads(request.vars.data) File "C:\Python\lib\json\__init__.py", line 348, in loads return _default_decoder.decode(s) File "C:\Python\lib\json\decoder.py", line 337, in decode obj, end = self.raw_decode(s, idx=_w(s, 0).end()) File "C:\Python\lib\json\decoder.py", line 353, in raw_decode obj, end = self.scan_once(s, idx) json.decoder.JSONDecodeError: Unterminated string starting at: line 1 column 440 (char 439)

Error snapshot 

JSONDecodeError(Unterminated string starting at: line 1 column 440 (char 439))

inspect attributes

Frames

• File C:\inetpub\wwwroot\gluon\restricted.py in restricted at line 219 код аргументы переменные

• File C:\inetpub\wwwroot\applications\application\controllers\useCalc.py in <module> at line 663 код аргументы переменные

• File C:\inetpub\wwwroot\gluon\globals.py in <lambda> at line 421 код аргументы переменные

• File C:\inetpub\wwwroot\applications\application\controllers\useCalc.py in sess at line 642 код аргументы переменные

• File C:\Python\lib\json\__init__.py in loads at line 348 код аргументы переменные

• File C:\Python\lib\json\decoder.py in decode at line 337 код аргументы переменные

• File C:\Python\lib\json\decoder.py in raw_decode at line 353 код аргументы переменные

  Function argument list

  (self=<json.decoder.JSONDecoder object>, s='{"fo":["очная","очная","очная"],"fac":["Мелиорац...ексов","Агроинженерия. Тех. системы в агробизнесе', idx=0)

  Code listing

  347.
  348.
  349.
  350.
  351.
  352.
  353.
  354.
  355.
  356.
  
          This can be used to decode a JSON document from a string that may
          have extraneous data at the end.
  
          """
          try:
              obj, end = self.scan_once(s, idx)
          except StopIteration as err:
              raise JSONDecodeError("Expecting value", s, err.value) from None
          return obj, end

  Variables

  obj	undefined
  end	undefined
  self	<json.decoder.JSONDecoder object>
  self.scan_once	<_json.Scanner object>
  s	'{"fo":["очная","очная","очная"],"fac":["Мелиорац...ексов","Агроинженерия. Тех. системы в агробизнесе'
  idx	0

[Val K]

Try data:{data: JSON.stringify(your_js_object_to_send)}

[Константин Комков]

If i do like that:

var myStrJson = JSON.stringify('{'+fo.slice(0,-1)+'],'+fac.slice(0,-1)+'],'+dir.slice(0,-1)+'],'+cg_id.slice(0,-1)+'],'+comp_group.slice(0,-1)+'],'+bud.slice(0,-1)+']}');

jQuery.ajax({

               type: "POST",

               url: "{{=URL('useCalc','sess')}}",

               data: {data: myStrJson},

               cache: false

           });

I have error in controller:

import json
        a = json.loads(request.vars.data)

        cgCount = len(a.get('fac'))

AttributeError('str' object has no attribute 'get')

Variavles

a	:	'{"fo":["очная","очная","очная"],"fac":["Мех...йство и водопользование"],"bud":["Да","Да","Да"]}'
json	:	<module 'json' from 'C:\\Python\\lib\\json\\__init__.py'>

I think you take me good advice about js object, but now it is python string, not dict.

[Константин Комков]

P.S. Val K, If I do like that in controller and in js as you told all work. Thank you! But I don't understant why I need use json.loads twice...

import json

        a = json.loads(request.vars.data)

        a = json.loads(a)

[Val K]

You should pass object to JSON.stringify not string, I mean fill the object with required data and then convert it to string by JSON.stringify, don't build json strings by your hand