Question

我正在尝试从数据库中预先填充字段。我有一个html页面，并且有一个表格，我将在该表格上单击链接，该链接将使用从数据库填充的值来呈现html表单。

但是问题是：我无法预填充HTML表单字段。以下是我的代码，我无法获取输出。

表中的html代码

<td>{{ info.university_code }}</td>
         <td>{{ info.avg_grescore }}</td>
         <td>{{ info.avg_english_score }}</td>
         <td>{{ info.avg_undergradcgpa }} CGPA</td>
         <td>{{ info.avg_workex_months }} Months</td>
         <td>{{ info.avg_research_skills }}%</td>
         <td>{{ info.avg_acceptancepercentage }}</td>
          <td><a href="{% url 'editSummary' univ_code=info.university_code  %}"

Views.py（这里存在我所有的逻辑，这不起作用并给我一个错误）

def editSummary(request,univ_code):

    if request.method == "POST":
        form = UniversitySummaryForm(request.POST or None, instance =   
        uiversity)
        if form.is_valid():
            form.save()
            return redirect('/AdminHome')

        else:
            form = UniversityInfoForm()

            form.fields["university_code"].queryset =UniversityNames.objects.filter(university_code=request.university_code)

    template_vars = RequestContext(request, {
        "form": form,
        "university_code": request.university_code
    })
    return render_to_response(
        "PredictiveAcceptance/AdminUniversitySummary.html",
        template_vars)

Models.py（用于数据库字段）

class UniversitySummaries(models.Model):
    university_code = models.ForeignKey('UniversityNames',
        models.DO_NOTHING, db_column='university_code', primary_key=True)
    avg_grescore = models.IntegerField()
    avg_english_score = models.IntegerField()
    avg_undergradcgpa = models.IntegerField()
    avg_workex_months = models.IntegerField()
    avg_research_skills = models.IntegerField()
    avg_acceptancepercentage = models.IntegerField()
    created_on = models.DateTimeField(auto_now_add = True)

Forms.py文件

class UniversitySummaryForm(forms.ModelForm):

    class Meta:
        model = UniversitySummaries
        fields = ('university_code', 'avg_grescore',
            'avg_english_score', 'avg_undergradcgpa', 'avg_workex_months',
            'avg_research_skills', 'avg_acceptancepercentage')

urls.py

urlpatterns = [
    url(r'^AdminHome/$', AdminSiteViews.home, name='home'),
    url(r'^AdminListOfUniversity/$', AdminSiteViews.list, name='list'),
    url(r'^AdminUniversitySummary/$', AdminSiteViews.summary, name='summary'),
    url(r'^editSummary/<univ_code>/$', AdminSiteViews.editSummary, name='editSummary'),
]

enter image description here

Answer 1

该错误与表单本身无关。而是，模板包含带有解析程序调用的URL标记，这将失败。解析器无法为此标签创建URL：

<a href="{% url 'editSummary' univ_code=info.university_code  %}"

您在这里使用外键的对象表示作为univ_code的值，但是info.university_code是UniversityNames类型的对象的字符串表示。

university_code = models.ForeignKey('UniversityNames',
    models.DO_NOTHING, db_column='university_code', primary_key=True)

您尚未发布模型，但我想url标签应如下所示：

<a href="{% url 'editSummary' univ_code=info.university_code.university_code  %}"

从代码中的这一行推导出来的：

UniversityNames.objects.filter(university_code=request.university_code)

Answer 2

模板中没有称为info的内容，因此不能将info.university_code用作url标签的参数。

您可以只做{% url 'editSummary' univ_code=university_code %}来解决它，但是模板的其余部分仍然会损坏。

NoReverseMatch用于呈现表单

2 个答案: