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    Unsolved Json-string inside a qml function possible?

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    • S
      Sam009 last edited by

      Hello,
      I will create a Json-string inside a qml function.
      but then I get the error Expected token `,' How i can fix this.
      I define the JsonString outside as a property var jsonString then inside the function i set the content to this variable.
      function add(){
      .......................
      ................
      jsonString = '{"Theoryname": ""+ rythmusname +"", "URL1": ""+ url1 +"", "URL2":"" + url2 +"","URL3": ""+ url3}';
      Component.onCompleted: {
      var JsonObject= JSON.parse(jsonString);
      //retrieve values from JSON again
      var aString = JsonObject.Theoryname;
      var bString = JsonObject.URL1;
      var cString = JsonObject.URL2;
      var dString = JsonObject.URL3;
      console.log(aString);
      console.log(bString);
      console.log(cString);
      console.log(dString);
      }
      }
      Is this correct, and can this work?

      JKSH 1 Reply Last reply Reply Quote 0
      • S
        Sam009 last edited by

        Also if i make the Component.onCompleted: {...} outside the function and the var jsonString inside the function to set the content.
        came the error ---> JSON.parse: Parse error .
        How I can fix this, if it is better to set the Component.onCompleted: {...} out
        The error came between
        var JsonObject= JSON.parse(jsonString);
        //retrieve values from JSON again
        var aString = JsonObject.Theoryname;
        Component.onCompleted: {

        				var JsonObject= JSON.parse(jsonString);
        				//retrieve values from JSON again
        				var aString = JsonObject.Theoryname;
        				var bString = JsonObject.URL1;
        				var cString = JsonObject.URL2;
        				var dString = JsonObject.URL3;
        
        				console.log(aString);
        				console.log(bString);
        				console.log(cString);
        				console.log(dString);
                                          }
        
        1 Reply Last reply Reply Quote 0
        • JKSH
          JKSH Moderators @Sam009 last edited by

          @Sam009 said in Json-string inside a qml function possible?:

          can this work?

          Yes. If you try a simpler string, it will work:

          jsonString = '{"key": "value"}'
          var JsonObject = JSON.parse(jsonString);

          '{"Theoryname": ""+ rythmusname +"", "URL1": ""+ url1 +"", "URL2":"" + url2 +"","URL3": ""+ url3}'

          This is not a valid JSON string. To see why, call console.log(jsonString)

          Qt Doc Search for browsers: forum.qt.io/topic/35616/web-browser-extension-for-improved-doc-searches

          S 1 Reply Last reply Reply Quote 1
          • S
            Sam009 @JKSH last edited by

            Hi @JKSH
            I made console.log(jsonString) and i get this string {"Theoryname": ""+ rythmusname +"", "URL1": ""+ url1 +"", "URL2":"" + url2 +"","URL3": ""+ url3}

            Then i have to make jsonString = {"Theoryname": " th1", "URL1": "url1", "URL2": " url2 " ,"URL3": "url3"} , Then it works if i make it define it directly and not with values.

            But i can define the jsonString inside the function and the var JsonObject = JSON.parse(jsonString); is outside the function? (in another fucntion)

            Thx i will try this.

            JKSH 1 Reply Last reply Reply Quote 0
            • JKSH
              JKSH Moderators @Sam009 last edited by

              @Sam009 said in Json-string inside a qml function possible?:

              But i can define the jsonString inside the function and the var JsonObject = JSON.parse(jsonString); is outside the function? (in another fucntion)

              Yes you can.

              Thx i will try this.

              You're welcome. Good luck!

              Qt Doc Search for browsers: forum.qt.io/topic/35616/web-browser-extension-for-improved-doc-searches

              S 1 Reply Last reply Reply Quote 1
              • S
                Sam009 @JKSH last edited by

                @JKSH

                Yes this works, thx.

                A smal question: How to define a Jason string array in qml. and also how to call it later. For example the first elment with his content?
                Give it in qml a for loop , for the Jason string array?

                JKSH 1 Reply Last reply Reply Quote 0
                • JKSH
                  JKSH Moderators @Sam009 last edited by

                  @Sam009 said in Json-string inside a qml function possible?:

                  A smal question: How to define a Jason string array in qml. and also how to call it later. For example the first elment with his content?
                  Give it in qml a for loop , for the Jason string array?

                  Hi, I'm don't quite understand your question. Can you show an example of what you want?

                  Qt Doc Search for browsers: forum.qt.io/topic/35616/web-browser-extension-for-improved-doc-searches

                  S 1 Reply Last reply Reply Quote 0
                  • S
                    Sam009 @JKSH last edited by

                    @JKSH
                    I will create a json array and there i will save multipe elements. And this elments i will call later to get the content of the first element, or the second. But if i do this (code) i get the error JSON.parse: Parse error. How i can fix this and also is it possiblel to create a array in that way?

                    function add(){
                    .......................
                    ................

                    switch (listrythmus.rh1) {
                    case 1: settings.jsonString[settings.jsonid] = '{"Rythmusname": "1", "URL1": "url1", "URL2":"url2","URL3": "url3"}'; break;
                    case 2: settings.jsonString[settings.jsonid] = '{"Rythmusname": "2 string", "URL1": "url1", "URL2":"url2","URL3": "url3"}'; break;
                    case 3: settings.jsonString[settings.jsonid] = '{"Rythmusname": "3", "URL1": "url1", "URL2":"url2","URL3": "url3"}'; break;
                    case 4: settings.jsonString[settings.jsonid] = '{"Rythmusname": "4", "URL1": "url1", "URL2":"url2","URL3": "url3"}'; break;
                    case 5: settings.jsonString[settings.jsonid] = '{"Rythmusname": "5", "URL1": "url1", "URL2":"url2","URL3": "url3"}'; break;
                    case 6: settings.jsonString[settings.jsonid] = '{"Rythmusname": "6", "URL1": "url1", "URL2":"url2","URL3": "url3"}'; break;
                    default: pluginDialog.close(); break;
                    }
                    jsonStringfunctheory()
                    console.log(settings.jsonString)

                    }
                    function jsonStringfunc{
                    Component.onCompleted; {
                    var JsonObject= JSON.parse(settings.jsonString);
                    //Error JSON.parse: Parse error
                    for(var i=0;i<settings.jsonid;i++){

                    				//retrieve values from JSON again
                    				var aString = JsonObject.Rythmusname[settings.jsonid];
                    				var bString = JsonObject.URL1[settings.jsonid];
                    				var cString = JsonObject.URL2[settings.jsonid];
                    				var dString = JsonObject.URL3[settings.jsonid];
                    
                                                        /*var aString = settings.jsonString.Rythmusname[settings.jsonid];
                    				var bString = settings.jsonString.URL1[settings.jsonid];
                    				var cString = settings.jsonString.URL2[settings.jsonid];
                    				var dString = settings.jsonString.URL3[settings.jsonid];*/
                    
                    				console.log(aString)
                    				console.log(bString)
                    				console.log(cString)
                    				console.log(dString)                                    }
                                                      }	
                                                     settings.jsonid ++
                                                    update(Dialog)
                                                    }
                    

                    jsonid is a extern variable store in the settings. it is the index.

                    JKSH 1 Reply Last reply Reply Quote 0
                    • JKSH
                      JKSH Moderators @Sam009 last edited by

                      @Sam009 said in Json-string inside a qml function possible?:

                      settings.jsonString[settings.jsonid] = '{"Rythmusname": "1", "URL1": "url1", "URL2":"url2","URL3": "url3"}';
                      

                      Well, even though you named your variable jsonString, you did not create a string. You created an array.

                      You cannot pass an array into JSON.parse(); you can only pass a string.

                      Make sure you understand this:

                      // v1 is an array
                      var v1 = [];
                      v1[0] = 42;
                      v1[1] = "Hello";
                      
                      // v2 is a string
                      var v2 = '[42, "Hello"]';
                      
                      // v3 is an array that is has the same value as v1
                      var v3 = JSON.parse(v2);
                      

                      Anyway, let's step back first: Why do you want to create JSON strings? Why not just use plain JavaScript objects and JavaScript arrays?

                      Qt Doc Search for browsers: forum.qt.io/topic/35616/web-browser-extension-for-improved-doc-searches

                      S 1 Reply Last reply Reply Quote 0
                      • S
                        Sam009 @JKSH last edited by Sam009

                        @JKSH
                        The idea is to create many elements with tag like URL1: "...." and this has different links etc..Also the name of the tag can by change and the number of tags this since I will make one element with "Rythmusname": "1", "URL1": "url1", "URL2":"url2","URL3": "url3" and a second "Typename": "1", "notename": "1", "URL1": "url1", "URL2":"url2","URL3": "url3". And I don´t know how to store this. So was the idea to create a Jason array/string that has all this and I will make a set of object that I can call later into an outer function. But I can only make one time the JSON. parse () and so a second so a second element get not store. (that was the idea to make an array and so it was "easier" to call a set/object with JsonObject.URL1 [id of the set]) But this don´t work give it a better solution?
                        {
                        "id": 1,
                        "Typename": "1"
                        "notename": "2"
                        "URL1": "url1",
                        "URL2":"url2",
                        "URL3": "url3"
                        },
                        {
                        "id": 2,
                        "Rythmusname": "Rythmusname"
                        "Url1": "1"
                        "Url2": "2"
                        "Url3": "3"
                        },
                        {
                        "id": 3,
                        Rythmusname": "Rythmusname"
                        "Url1": "1"
                        "Url2": "2"
                        "Url3": "3"
                        }
                        Or is it better to create more Json to store the different content, so that I have one for Rythmusname and Typename/notename. Into the settings I make the property very jsonString: [] them into the function I call it. But this is wrong since JSON. parse (v2) will create an Array of string (v2), if I understand the example with v3. Then I change jsonString: [] to jsonString. But then I can´t store more as one object/set.
                        How I can make that it store more elements that I can call later by here Id?I hope it is understandable, and I'm sorry for the many questions.

                        JKSH 1 Reply Last reply Reply Quote 0
                        • JKSH
                          JKSH Moderators @Sam009 last edited by JKSH

                          You don't need JSON strings for this.

                          @Sam009 said in Json-string inside a qml function possible?:

                          {
                          "id": 1,
                          "Typename": "1"
                          "notename": "2"
                          "URL1": "url1",
                          "URL2":"url2",
                          "URL3": "url3"
                          },
                          {
                          "id": 2,
                          "Rythmusname": "Rythmusname"
                          "Url1": "1"
                          "Url2": "2"
                          "Url3": "3"
                          }

                          var obj1 = {};
                          obj1["id"] = 1; // NOTE: This is the same as ` obj1.id = 1`
                          obj1["Typename"] = "1";
                          obj1["notename"] = "2";
                          obj1["URL1"] = "url1";
                          obj1["URL2"] = "url2";
                          obj1["URL3"] = "url3";
                          
                          var obj2 = {};
                          obj2["id"] = 2;
                          obj2["Rythmusname"] = "Rythmusname";
                          obj2["Url1"] = "1";
                          obj2["Url2"] = "2";
                          obj2["Url3"] = "3";
                          
                          console.log(obj1.Typename)
                          console.log(obj2.Rhythmusname)
                          

                          Qt Doc Search for browsers: forum.qt.io/topic/35616/web-browser-extension-for-improved-doc-searches

                          S 1 Reply Last reply Reply Quote 1
                          • S
                            Sam009 @JKSH last edited by Sam009

                            @JKSH
                            Ok and how I can it dynamically so that it can create more as 1 from the same. Since the idea is to create a X of number of them and save this. And later call them individually. (without to create multiple obj1... or jsaonstring)
                            If a I create a 2 theory then the previous information is not overwritten.
                            I've done it with Json-string, but I can only do one time "var JsonObject = JSON.parse (settings.jsonString);" , and if i set a 2 element (2 theorie) is no longer saved.
                            How do I can create more than one element of theorie and save it?

                            JKSH 1 Reply Last reply Reply Quote 0
                            • JKSH
                              JKSH Moderators @Sam009 last edited by

                              @Sam009 said in Json-string inside a qml function possible?:

                              Ok and how I can it dynamically so that it can create more as 1 from the same. Since the idea is to create a X of number of them and save this. And later call them individually. (without to create multiple obj1... or jsaonstring)
                              If a I create a 2 theory then the previous information is not overwritten.
                              I've done it with Json-string, but I can only do one time "var JsonObject = JSON.parse (settings.jsonString);" , and if i set a 2 element (2 theorie) is no longer saved.
                              How do I can create more than one element of theorie and save it?

                              I'm sorry, I don't understand your description.

                              Here's a way to dynamically create Objects and put them into Arrays. I hope it helps:

                              Code

                              var array = [];
                              for (var i = 0; i < 3; ++i)
                              {
                                  var obj = {};
                                  obj["id"] = i;
                                  obj["url"] = "url" + i;
                              
                                  array.push(obj);
                              }
                              
                              console.log(array)
                              

                              Output

                              [ { id: 0, url: 'url0' },
                                { id: 1, url: 'url1' },
                                { id: 2, url: 'url2' } ]
                              

                              Qt Doc Search for browsers: forum.qt.io/topic/35616/web-browser-extension-for-improved-doc-searches

                              S 1 Reply Last reply Reply Quote 1
                              • zixuan
                                zixuan last edited by

                                Based on the answer of JKSH, it is not a valid string so you need to log this.

                                zixuan (talk)

                                1 Reply Last reply Reply Quote 0
                                • S
                                  Sam009 @JKSH last edited by Sam009

                                  @JKSH
                                  ---- First create an Object, then parse into a Json.------------------

                                  if i make a object like :
                                  objRhytmus["id"] = 12; objRhytmus["Rythmusname"] = "th1"; objRhytmus["URL1"] = "Link"; objRhytmus["URL2"] = "Link"; objRhytmus["URL3"] = "Link";

                                  Then var json2 = JSON.stringify(objRhytmus); this object is now a Json-string and how i can call the emelent "id" with objRhytmus["id"]
                                  Then i make a JSON.parse(json2) . to get a Json-string, but is this still like this:
                                  [
                                  {
                                  "id": 1,
                                  "Typename": "1"
                                  "notename": "2"
                                  "URL1": "url1",
                                  "URL2":"url2",
                                  "URL3": "url3"
                                  },
                                  {
                                  "id": 2,
                                  "Rythmusname": "Rythmusname"
                                  "Url1": "1"
                                  "Url2": "2"
                                  "Url3": "3"
                                  },
                                  {
                                  "id": 3,
                                  Rythmusname": "Rythmusname"
                                  "Url1": "1"
                                  "Url2": "2"
                                  "Url3": "3"
                                  }
                                  ]

                                  And if i call the id of one set then i can get the whole set with this id, or is it now a string?
                                  But can I make this multiple time so that the previously element is still there and not override. Or how i can do that i have more as one set of this object/set?

                                  JKSH 1 Reply Last reply Reply Quote 0
                                  • JKSH
                                    JKSH Moderators @Sam009 last edited by

                                    @Sam009 said in Json-string inside a qml function possible?:

                                    This is the first part of your code:

                                    if i make a object like :
                                    objRhytmus["id"] = 12; objRhytmus["Rythmusname"] = "th1"; objRhytmus["URL1"] = "Link"; objRhytmus["URL2"] = "Link"; objRhytmus["URL3"] = "Link";

                                    This is the 2nd part of your code:

                                    Then var json2 = JSON.stringify(objRhytmus); this object is now a Json-string and how i can call the emelent "id" with objRhytmus["id"]
                                    Then i make a JSON.parse(json2) . to get a Json-string, but is this still like this:
                                    [
                                    {
                                    "id": 1,
                                    "Typename": "1"
                                    "notename": "2"
                                    "URL1": "url1",
                                    "URL2":"url2",
                                    "URL3": "url3"
                                    },
                                    {
                                    "id": 2,
                                    "Rythmusname": "Rythmusname"
                                    "Url1": "1"
                                    "Url2": "2"
                                    "Url3": "3"
                                    },
                                    {
                                    "id": 3,
                                    Rythmusname": "Rythmusname"
                                    "Url1": "1"
                                    "Url2": "2"
                                    "Url3": "3"
                                    }
                                    ]

                                    Can you please update your example? Make the first part match the second part. Otherwise, it is difficult for me to understand what you want.

                                    Qt Doc Search for browsers: forum.qt.io/topic/35616/web-browser-extension-for-improved-doc-searches

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                                    • S
                                      Sam009 @JKSH last edited by

                                      @JKSH
                                      Hi, I'm sorry for the late answer. Thanks for your help, I find out a solution. And for the moment it works :) I made an "object array" obj [n] = {"id": Val, "url": "url"}And n is the value of the id., and it is the set number.
                                      And if I will set a new element to this val I take the val of id and put the new element (the with different element names.) on it. obj[n] = { "id" : val, "url2": "url"}. so at the object with the id = x get a new value.
                                      And I use jsonstring = JSON. stringify (obj); to make a json object of all object[].

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