ListModel Append Data Application is Crash

[A Former User]

Hello, my application quits interestingly when I add data to my list model. Is it because the data is an object list, I wonder if it is null data?

13:30:53: The program has unexpectedly finished.
13:30:53: The process was ended forcefully.

I did some experimentation and came to the following conclusion. If I try a code like the following, it adds it successfully, but I have problems accessing the data.

        for(let i = 0; i < modelData.length; i++) {
            dataModel.append({'event': modelData[i]})
        }

This way my app crashes

        for(let i = 0; i < modelData.length; i++) {
            dataModel.append(modelData[i])
        }

JSON data looks like

[
    {
        "id": "5c9dfa7e99bab859223e8026",
        "name": "Example1",
        "category": {
            "iso": "ESP",
            "name": "Esp"
        },
        "games": [
            {
                "id": "5f4d8f99d458a829dc651e0c",
                "properties": {
                    "host": {
                        "id": "5c9dfc4c99bab85b3776460a",
                        "name": "Host 1",
                        "image": "team/679759d9d930550fb50a5d30ba313fb196d55e3f92770f30dc383352cbf578ba.png"
                    }
                }
            },
                        {
                "id": "5f4d8f99d458a829dc651e0c",
                "properties": {
                    "host": {
                        "id": "5c9dfc4c99bab85b3776460a",
                        "name": "Host 2",
                        "image": "team/679759d9d930550fb50a5d30ba313fb196d55e3f92770f30dc383352cbf578ba.png"
                    }
                }
            }
        ]
    },

    {
        "id": "5c9dfa7e99bab859223e8026",
        "name": "Example2",
        "category": {
            "iso": "ASP",
            "name": "ASP"
        },
        "games": [
            {
                "id": "5f4d8f99d458a829dc651e0c",
                "properties": {
                    "host": {
                        "id": "5c9dfc4c99bab85b3776460a",
                        "name": "Host 1",
                        "image": "team/679759d9d930550fb50a5d30ba313fb196d55e3f92770f30dc383352cbf578ba.png"
                    }
                }
            },
                        {
                "id": "5f4d8f99d458a829dc651e0c",
                "properties": {
                    "host": {
                        "id": "5c9dfc4c99bab85b3776460a",
                        "name": "Host 2",
                        "image": "team/679759d9d930550fb50a5d30ba313fb196d55e3f92770f30dc383352cbf578ba.png"
                    }
                }
            }
        ]
    }
]

[A Former User]

What could be wrong? How can I add my data directly as follows ? In this way, it is necessary to access my data more easily and to use section, otherwise I do not know how to pass data to the section property.

        for(let i = 0; i < modelData.length; i++) {
            dataModel.append(modelData[i])
        }

[jsulm]

@NullByte And what does the stack trace tell you?

[A Former User]

@jsulm

edited

[JonB]

@NullByte
Although I'm not sure whether it will really clarify: get rid of your two screenshots showing the disassembly --- it doesn't help us --- and show just the stack trace, which you currently have going back to level #11 and we need to see going back further all the way into your code.

[A Former User]

@JonB @jsulm Sorry for this. I used console.trace() command for stack trace and got an output like

setFixtureData (qrc:/AllGames.qml:732)
onCompleted (qrc:/AllGames.qml:726)
 (qrc:/goalkolik.js:25)
<Unknown File>: topIndex is null. Adding an object with a null member does not create a role for it.

[JonB]

@NullByte
Well, that's not the stack trace window, which you did show, but only as far as level #11, and I said you ought show the rest of it.

But never mind, maybe that error message you show now is enough for you to correct?

[A Former User]

@JonB In fact, I mentioned in my first post that I had concerns about this issue. I did some work on this, I tried to eliminate the null values, but after a few attempts I found that it was not useful. Maybe I was not a QML newbie. Can you help me? I tried something like this to remove null values

JSON.parse(xhr.responseText.replace(/null/g, '""'))

<Unknown File>: Can't assign to existing role 'videoId' of different type [Number -> String]

[JonB]

@NullByte

• Your "Can't assign ... [Number -> String]" does not look like it would come from that line, more perhaps from trying to parse null or "" as a number somewhere else.

• I'm not sure your xhr.responseText.replace(/null/g, '""') will work. For one thing, Python null is None. You should test? To cover that correctly I would go:

text = xhr.responseText
if text is None:
    text = ""

EDIT Whoops, you are JavaScript, not Python, I don't do QML! :)

I'm still not sure about your replace() on null. What about:

text = xhr.responseText;
if text == null
    text = "";

This should allow for either null or undefined in JS.

[A Former User]

It's work

var tmpData = JSON.parse(xhr.responseText.replace(/null/g, '""'))

if(tmpData[z].games[d].videoId === null || tmpData[z].games[d].videoId === undefined || tmpData[z].games[d].videoId === "") {
    tmpData[z].games[d].videoId = 0
}