Jump to content

Welcome to Smart Home Forum by FIBARO

Dear Guest,

 

as you can notice parts of Smart Home Forum by FIBARO is not available for you. You have to register in order to view all content and post in our community. Don't worry! Registration is a simple free process that requires minimal information for you to sign up. Become a part of of Smart Home Forum by FIBARO by creating an account.

 

As a member you can:

  •     Start new topics and reply to others
  •     Follow topics and users to get email updates
  •     Get your own profile page and make new friends
  •     Send personal messages
  •     ... and learn a lot about our system!

 

Regards,

Smart Home Forum by FIBARO Team


  • 0

How to reference embedded attribute using Json.decode


UriT

Question

Newbie scripting question. Thanks to all the posts here I have learnt a lot in the last few weeks ... so thank you for all your knowledge and insights and generosity for sharing.

 

I am adapting Yamaha MusicCast QA.

 

I have worked out how to query the Yamaha depending on what it is playing eg Tuner or Spotify etc.

 

My query as per below code 

  local queryinfo = "/YamahaExtendedControl/v1/tuner/getPlayInfo"
              urlinfo = url .. "" .. queryinfo
              self.httpClient:request(urlinfo, 
                { 
                  options={method = "GET"
                  },
                  success = function (response)
                    if (response.status >= 200 and response.status < 300then
                      jS = json.decode(response.data)               
                      self:debug(response.data)

 

Returns the following response

 {"response_code":0,"band":"fm","auto_scan":false,"fm":{"preset":4,"freq":106500,"tuned":true,"audio_mode":"mono"}}

 

I have learnt to reference the band I can simply do something like

 band = (js.band)

 

The question is .. how do I extract the "freq" value?

 

if I do freq = (js.freq) I get "nil"

 

How do you parse the values embedded within a secondary {} ?

Link to comment
Share on other sites

3 answers to this question

Recommended Posts

  • 0
  • Inquirer
  • Yes that is the one I am adapting .. Sorry I didn't quite understand

     

    Did you mean..

     

    freq = response.data["freq"

    self:debug(freq) 

     

    But still get nil

     
    I had tried just 
    freq = data["freq"

     

    but got

     

    main.lua:215: attempt to index a nil value (global 'data')

    Link to comment
    Share on other sites

    • 0

    OMG. OK

     

    Please login or register to see this attachment.

     

     

    local raw =  '{"response_code":0,"band":"fm","auto_scan":false,"fm":{"preset":4,"freq":106500,"tuned":true,"audio_mode":"mono"}}';
    local xlat = json.decode(raw)
    print(xlat["fm"]["freq"])
     
    Link to comment
    Share on other sites

    Join the conversation

    You can post now and register later. If you have an account, sign in now to post with your account.

    Guest
    Answer this question...

    ×   Pasted as rich text.   Paste as plain text instead

      Only 75 emoji are allowed.

    ×   Your link has been automatically embedded.   Display as a link instead

    ×   Your previous content has been restored.   Clear editor

    ×   You cannot paste images directly. Upload or insert images from URL.

    ×
    ×
    • Create New...