如何让JavaScript从Django中的views.py识别context_dict对象

我从一位前同事那里接手了一个Django项目，我必须编辑他的代码，在GoogleViz折线图中添加一条线

由于折线图已经存在，我正试图尽可能遵循用于创建它的逻辑（考虑到我以前从未做过类似的事情）。我将新的数据模型添加到

models.py

，成功地迁移了它，并找到了

views.py

中他为折线图和它下面的表设置数据的部分

我试图复制他在

views.py

中所做的操作，然后代码似乎在实际创建图表的JavaScript文件中从中获取。然而，当我使用JavaScript时，它似乎从

views.py

中识别出了他的对象，但根据我在Web控制台日志中看到的内容，它没有识别出我的对象

他在

views.py

中创建的关键对象是

module\u progressjs

。带有新行数据的我的对象称为

tii\u progressjs

。在我看来，调用

context\u dict

是用来将数据从Python传递到JavaScript的，但我复制了这种方法，它似乎不起作用

这是

views.py

代码的核心。与“模块”相关的所有内容都是原始（工作）代码，与“tii”或“交上来”相关的所有内容都是我添加的部分。此代码块中的一些代码可能与表相关，而不是与图表相关，但我还不确定，因此我遵循了所有代码块的逻辑，尽管我将只编辑图表：

try:
    module_attempts = Studentmoduleprogress.objects.values().filter(Person_bnrid = Person_bnrid).annotate(Max('Start_date')).order_by('-Start_date')
    turn_it_in = TII.objects.values().filter(Person_bnr_id = Person_bnrid).annotate(Max('Course_start')).order_by('-Course_start')
    context_dict['turn_it_in'] = turn_it_in
    context_dict['module_attempts'] = module_attempts
    tiiavg = TII.objects.values('COURSE_IDENTIFICATION','Course_start').annotate(wk1_avg=Avg('TurnItIn_W01'), wk2_avg=Avg('TurnItIn_W02'),
                                                                                        wk3_avg=Avg('TurnItIn_W03'),wk4_avg=Avg('TurnItIn_W04'),
                                                                                        wk5_avg=Avg('TurnItIn_W05'),wk6_avg=Avg('TurnItIn_W06'),
                                                                                        wk7_avg=Avg('TurnItIn_W07'),wk8_avg=Avg('TurnItIn_W08'),
                                                                                        wk9_avg=Avg('TurnItIn_W09'),wk10_avg=Avg('TurnItIn_W10'),
                                                                                        wk11_avg=Avg('TurnItIn_W11'),wk12_avg=Avg('TurnItIn_W12'))

    modavg = Studentmoduleprogress.objects.values('Module_code','Start_date').annotate(wk1_avg=Avg('Week_01'), wk2_avg=Avg('Week_02'),
                                                                                        wk3_avg=Avg('Week_03'),wk4_avg=Avg('Week_04'),
                                                                                        wk5_avg=Avg('Week_05'),wk6_avg=Avg('Week_06'),
                                                                                        wk7_avg=Avg('Week_07'),wk8_avg=Avg('Week_08'),
                                                                                        wk9_avg=Avg('Week_09'),wk10_avg=Avg('Week_10'),
                                                                                        wk11_avg=Avg('Week_11'),wk12_avg=Avg('Week_12'))

    #print modavg
    context_dict['tiiavg'] = mark_safe(json.dumps(list(tiiavg), cls = DateTimeEncoder))
    context_dict['modavg'] = mark_safe(json.dumps(list(modavg), cls = DateTimeEncoder))
    module_progress = []
    for module in module_attempts:
        max_week = module['Module_duration_max']
        progress_lst = ['Module_code', module['Module_code'], 'Start_date', module['Start_date'], 'End_date', module['End_date']]
        for wk in range(1, max_week + 1):
            week = 'Week_' + (str(wk) if wk >= 10 else '0' + str(wk))
            progress_lst.append(week)
            progress_lst.append(module[week])
        module_progress.append(progress_lst)

    tii_progress = []
    for module in turn_it_in:
        max_week = module['Module_duration_max']
        progress_lst = ['COURSE_IDENTIFICATION', module['COURSE_IDENTIFICATION'], 'Course_start', module['Course_start'], 'Course_end', module['Course_end']]
        for wk in range(1, max_week + 1):
            week = 'TurnItIn_W' + (str(wk) if wk >= 10 else '0' + str(wk))
            progress_lst.append(week)
            progress_lst.append(module[week])
        tii_progress.append(progress_lst)

    #print module_progress
    context_dict['tii_progress'] = tii_progress
    context_dict['module_progress'] = module_progress
    context_dict['module_progressjs'] = mark_safe(json.dumps(module_progress, cls = DateTimeEncoder))
    context_dict['tii_progressjs'] = mark_safe(json.dumps(tii_progress, cls = DateTimeEncoder))

JS如下所示。为了简洁起见，我删掉了前95%的内容，但如果您想查看完整的脚本，请查看编辑历史：

   // Module Progress
    google.charts.setOnLoadCallback(drawModProgress);

    $(window).resize(function(){
        //google.charts.setOnLoadCallback(drawModProgress);
        drawModProgress();
    });


    function drawModProgress() {

        var data = new google.visualization.DataTable();
        var selOption  = $("#mcode option:selected").val();
        var dateOption  = $("#sdate option:selected").val();
        var modset = {};
        var selModule = [];
        var selTII= [];
        var wks = [];
        var posts = [];
        var yTicks = [];
        var l=0, m=0;    
        var tii = [];


        for(i=0; i < module_progressjs.length; i++)
        {
            if(module_progressjs[i][1] == selOption)
            //if (modset.Module_code == selOption && modset.Start_date == dateOption)
            {

                selModule[0]= module_progressjs[i];
                //console.log(selModule[0]);

           }        
        }
       //console.log(tii_progressjs[1]);
       //console.log(tii_progressjs);
        /*for(ii=0; ii < tii_progressjs.length; ii++)
        {
            if(tii_progressjs[ii][1] == selOption)
            {

                selTII[0]= tii_progressjs[ii];
           }        
        }*/

更新：我开始认为缺少的链接是HTML。这听起来像是JS中的

document.getelementbyid

语句从HTMLDOM中提取信息，我没有向HTML添加任何内容

更新2:看看HTML模板末尾的这一点，我打赌我应该编辑以下内容：

<script type="text/javascript"> 
var studtests = {{ studtests | safe }};
var studobjs =  {{ studobjs | safe }};
//var modulesjs =  {{ modulesjs | safe }};
var studsumryjs = {{ studsumryjs | safe }};
var module_progressjs = {{ module_progressjs | safe }};
var modavg = {{ modavg | safe }};
</script>

<script src = "{%static 'js/student.js' %}" type="text/javascript"> 
</script>
{% endblock %} 

var studtests={{studtests | safe}}；
var studobjs={{studobjs|safe}；
//var modulesjs={{modulesjs|safe}；
var studsumryjs={{studsumryjs|safe}；
var module_progressjs={{module_progressjs|safe}；
var modavg={{modavg|safe}；
{%endblock%}

答案似乎不是直接从

views.py

到JS，而是从

views.py

到HTML模板，然后在调用脚本时将数据传递给JS

具体而言，我必须更改HTML中的以下代码块：

<script type="text/javascript"> 
var studtests = {{ studtests | safe }};
var studobjs =  {{ studobjs | safe }};
var studsumryjs = {{ studsumryjs | safe }};
var module_progressjs = {{ module_progressjs | safe }};
var modavg = {{ modavg | safe }};
</script>

<script src = "{%static 'js/student.js' %}" type="text/javascript"> 
</script>

var studtests={{studtests | safe}}；
var studobjs={{studobjs|safe}；
var studsumryjs={{studsumryjs|safe}；
var module_progressjs={{module_progressjs|safe}；
var modavg={{modavg|safe}；

到

var studtests={{studtests | safe}}；
var studobjs={{studobjs|safe}；
var studsumryjs={{studsumryjs|safe}；
var module_progressjs={{module_progressjs|safe}；
var modavg={{modavg|safe}；
var tiiavg={{tiiavg|safe}；
var tii_progressjs={{tii_progressjs|safe}；

然后，我能够对JS进行必要的更改，以便在图表中包含我想要的额外行

<script type="text/javascript"> 
var studtests = {{ studtests | safe }};
var studobjs =  {{ studobjs | safe }};
var studsumryjs = {{ studsumryjs | safe }};
var module_progressjs = {{ module_progressjs | safe }};
var modavg = {{ modavg | safe }};
</script>

<script src = "{%static 'js/student.js' %}" type="text/javascript"> 
</script>

<script type="text/javascript"> 
var studtests = {{ studtests | safe }};
var studobjs =  {{ studobjs | safe }};
var studsumryjs = {{ studsumryjs | safe }};
var module_progressjs = {{ module_progressjs | safe }};
var modavg = {{ modavg | safe }};
var tiiavg = {{ tiiavg | safe }};
var tii_progressjs = {{tii_progressjs | safe}};
</script>

<script src = "{%static 'js/student.js' %}" type="text/javascript"> 
</script>