0

JSONデータを段落に表示しようとしていますが、異なる日付で取得されたデータの間に仕切りがあります。

function getAllLogs(emId) {
    $.getJSON('datafile.json', function(data) {
        $("#" + emId).html("All logs:<br>");
        var firstDateDisplayed = false;
        $.each(data, function(index, value) {
            //Only displays dates once, then all log sheets for that date
            if (firstDateDisplayed === false ||
                data[index-1].log_sheet.time !== value.log_sheet.time) {

                $("#" + emId).append("<br>----------------<br>");
                //Formats and appends date to a paragraph
                getLogDate(emId, index);
                firstDateDisplayed = true;
            }

            //Formats and appends time to a paragraph
            getLogTime(emId, index);
            //Formats and appends all data to a paragraph
            getLogData(emId, index);
        });
    });
}

私が欲しいもの：

All logs:
----------------
Date 1
Time 1
Data 1
Time 2
Data 2
Time 3
Data 3
----------------
Date 2
Time 4
Data 4
Time 5
Data 5

私が得るもの：

----------------

----------------        
Date 1
Time 1
Data 1
Time 2
Data 2
Time 3
Data 3
Date 2
Time 4
Data 4
Time 5
Data 5

JSONデータの例：

[
    {
        "log_sheet": {
            "data":"4",
            "date":"2012-07-27T00:00:00-06:00",
            "time":"2000-01-01T02:15:00Z",
            "more_data":"7"
        }
    },
    {    
        "log_sheet": {
            "data":"8,
            "date":"2012-07-27T00:00:00-06:00",
            "time":"2000-01-01T07:30:00Z",
            "more_data":"3"
        }
    }
]

これを修正するにはどうすればよいですか？日付は正しく表示されますが、仕切りが表示されないのはなぜですか？

getLogTime関数：

//Gets, formats and displays the time for the current log sheet in the 
//header of a collapsible menu or paragraph
function getLogTime(emId, logNum) {
    //Accesses the JSON file
$.getJSON('datafile.json', function(data) {
    //Takes only the part of the string that corresponds to time
    var time = data[logNum].log_sheet.measured_at_time.substring(11,16);
    //Formats time to 12 hour clock according to the hour
    switch (time.substring(0, 2))
        {
    case "00":
        //Changes 00 to 12 and adds am
        time = time.replace(/00/, "12") + " am";
        break;
    case "01":
    case "02":
    case "03":
    case "04":
    case "05":
    case "06":
    case "07":
    case "08":
    case "09":
        //Removes extra 0 and adds am
        time = time.replace(/0/, "") + " am";
        break;
    case "10":
    case "11":
        //Adds am
        time += " am";
        break;
    case "12":
        //Adds pm
        time += " pm";
        break;
    case "13":
        //Replaces 13 with 1 and adds pm
        time = time.replace(/13/, "1") + " pm"
    case "14":
        //Replaces 14 with 2 and adds pm
        time = time.replace(/14/, "2") + " pm";
        break;
    case "15":
        //Replaces 15 with 3 and adds pm
        time = time.replace(/15/, "3") + " pm";
        break;
    case "16":
        //Replaces 16 with 4 and adds pm
        time = time.replace(/16/, "4") + " pm";
        break;
    case "17":
        //Replaces 17 with 5 and adds pm
        time = time.replace(/17/, "5") + " pm";
        break;
    case "18":
        //Replaces 18 with 6 and adds pm
        time = time.replace(/18/, "6") + " pm";
        break;
    case "19":
        //Replaces 19 with 7 and adds pm
        time = time.replace(/19/, "7") + " pm";
        break;
    case "20":
        //Replaces 20 with 8 and adds pm
        time = time.replace(/20/, "8") + " pm";
        break;
    case "21":
        //Replaces 21 with 9 and adds pm
        time = time.replace(/21/, "9") + " pm";
        break;
    case "22":
        //Replaces 22 with 10 and adds pm
        time = time.replace(/22/, "10") + " pm";
        break;
    case "23":
        //Replaces 23 with 11 and adds pm
        time = time.replace(/23/, "11") + " pm";
        break;
    }
    //Uses only a portion of the string to accommodate possible future
    //numbers
    if (emId.substring(0,4) === "time") {
        //Sets text in header to time
    $("#" + emId + " .ui-btn-text").html(time);
    } else {
        //For displaying all of the logs
    $("#" + emId).append(time + "<br>");
    }
});
}
4

3 に答える 3

1

問題は、でより多くのデータを取得するときに、非同期$.getJSON()のAJAXを使用していることです。つまり、スクリプトは呼び出しが終了するのを待つのではなく、実行を続行します。サーバーからデータを取得する際に遅延が発生しますが、仕切りはすぐに印刷されるため、データは常に仕切りの後に印刷されます。

簡単な修正方法は、メインループ内のデータ用にコンテナーを予約して、AJAX呼び出しがいつ終了するかが問題にならないようにすることです。

function getAllLogs(emId) {
    $.getJSON('datafile.json', function(data) {

        var $emId = $( '#' + emId );  // cache the main container

        $("#" + emId).html("All logs:<br>");
        var firstDateDisplayed = false;
        $.each(data, function(index, value) {
            //Only displays dates once, then all log sheets for that date
            if (firstDateDisplayed === false ||
                data[index-1].log_sheet.time !== value.log_sheet.time) {

                $emId.append("<br>----------------<br>");

                // create a container for the date and have getLogDate() fill it later
                $emId.append( '<div id="'+emId+'Date'+index+'"></div>' );
                getLogDate(emId+'Date'+index, index);

                firstDateDisplayed = true;
            }

            // do the same to the rest of the functions as we did above for getLogDate()
            $emId.append( '<div id="'+emId+'Time'+index+'"></div>' );
            $emId.append( '<div id="'+emId+'Data'+index+'"></div>' );
            getLogTime(emId+'Time'+index, index);
            getLogData(emId+'Data'+index, index);
        });
    });
}
于 2012-08-08T07:35:42.423 に答える
1

だから基本的にあなたがしたいのは、新しい日付の出現があるときに----を入力することですか？

var json = [
{
    "log_sheet": {
        "data":"4",
        "date":"2012-07-27T00:00:00-06:00",
        "time":"2000-01-01T02:15:00Z",
        "more_data":"7"
    }
},
{
    "log_sheet": {
        "data":"4",
        "date":"2012-07-27T00:00:00-06:00",
        "time":"2000-01-01T02:15:00Z",
        "more_data":"7"
    }
},
{
    "log_sheet": {
        "data":"4",
        "date":"2012-07-27T00:00:00-06:00",
        "time":"2000-01-01T02:15:00Z",
        "more_data":"7"
    }
},
{
    "log_sheet": {
        "data":"4",
        "date":"2012-07-27T00:00:00-06:00",
        "time":"2000-01-01T02:17:00Z",
        "more_data":"7"
    }
}
];


console.log("All logs:");
$.each(json, function(index, value) {
  if(index == 0 || (index > 0 && json[index-1].log_sheet.time !== value.log_sheet.time))
  {
   console.log("-----------");
  }
  console.log("Date " + index + ": " + value.log_sheet.date);
  console.log("Time " + index + ": " + value.log_sheet.time);
  console.log("Data " + index + ": " + value.log_sheet.data);
});

結果：

All logs:
-----------
Date 0: 2012-07-27T00:00:00-06:00
Time 0: 2000-01-01T02:15:00Z
Data 0: 4
Date 1: 2012-07-27T00:00:00-06:00
Time 1: 2000-01-01T02:15:00Z
Data 1: 4
Date 2: 2012-07-27T00:00:00-06:00
Time 2: 2000-01-01T02:15:00Z
Data 2: 4
-----------
Date 3: 2012-07-27T00:00:00-06:00
Time 3: 2000-01-01T02:17:00Z
Data 3: 4

したがって、書き直された関数は次のようになります。

function getAllLogs(emId) {
    $.getJSON('datafile.json', function(data) {
        var $output = $("#" + emId);
        $output.html("All logs:<br>");
        $.each(data, function(index, value) {
            //Only displays dates once, then all log sheets for that date
            if(index == 0 || (index > 0 && json[index-1].log_sheet.time !== value.log_sheet.time))
            {
                $output.append("<br>----------------<br>");
                //Formats and appends date to a paragraph
                //getLogDate(emId, index);
                $output.append("Date " + index + ": " + value.log_sheet.time +"<br/>");
            }
            //Formats and appends time to a paragraph
            //getLogTime(emId, index);
            $output.append("Time " + index + ": " + value.log_sheet.time +"<br/>");
            //Formats and appends all data to a paragraph
            //getLogData(emId, index);
            $output.append("Data " + index + ": " + value.log_sheet.data +"<br/>");
        });
    });
}
于 2012-08-07T19:26:00.823 に答える
0

私があなたの投稿から収集できることから、あなたは本質的にログをそれらのプロパティごとにグループ化dataしtimeていdateます。それがキャストの場合は、次のようなものを試すことができます。

function getAllLogs(elementId)
{
    $.getJSON('datafile.json', function(data)
    {
        var logElement = $('#' + elementId).append('All logs:<br />');

        var lastLogDateDisplayed = null;
        $.each(data, function(index, value)
        {
            // check if we've reached another date
            if (lastLogDateDisplayed != value.log_sheet.date)
            {
                // update the last shown date, and select its html
                lastLogDateDisplayed = value.log_sheet.date;
                logElement.append('----------------<br />');
                    .append(getLogDate(value));
            }

            // select the time and data as html strings
            logElement.append(getLogTime(value))
                .append(getLogData(value));
        });
    });
}

There's a few improvements here worth noting explicitliy. Firstly we're only selecting the elementId element once. This improves performance on our selectors from a previous hit rate of 1 + 4n down to 1. Additionally, as a result of this, the getLogDate, getLogTime and getLogData are not accepting the value (i.e. the current log item), and are returning either a dom, or jQuery object to append to the log element itself.

It's a few alterations, but it's cleaner, and hopefully will help solve your problem.

于 2012-08-07T19:41:12.887 に答える