Python 如何统计和显示数据库表条目Django
我正在使用chartsjs生成图表。 我已将图表标签设置为: Index.pyPython 如何统计和显示数据库表条目Django,python,django,Python,Django,我正在使用chartsjs生成图表。 我已将图表标签设置为: Index.py labels: [ {% for number in the_numbers_from_Floating %} "week " + {{ number.pk }}, {% endfor %} ], def index(request): the_numbers_from_Floating = Floating.objects.all() return render(
labels: [
{% for number in the_numbers_from_Floating %}
"week " + {{ number.pk }},
{% endfor %}
],
def index(request):
the_numbers_from_Floating = Floating.objects.all()
return render(request, "index.html", {
'the_numbers_from_Floating': the_numbers_from_Floating,
})
视图.py
labels: [
{% for number in the_numbers_from_Floating %}
"week " + {{ number.pk }},
{% endfor %}
],
def index(request):
the_numbers_from_Floating = Floating.objects.all()
return render(request, "index.html", {
'the_numbers_from_Floating': the_numbers_from_Floating,
})
我的问题是,我正在将标签设置为数据库表的pk
。如果删除条目并添加新条目,则pk
值升高。因此,我扔掉了下面图片中的标签。要解决这个问题,我应该设置它,以便迭代到表的count()
。但是我怎么能做到呢
您可以使用范围定义标签索引:
def index(request):
the_numbers_from_Floating = Floating.objects.all()
return render(request, "index.html", {
'the_numbers_from_Floating': the_numbers_from_Floating,
'label_indexes': range(1, the_numbers_from_Floating.count()+1)
})
然后在模板中:
labels: [
{% for index in label_indexes %}
"week " + {{ index }},
{% endfor %}
],
谢谢,这帮了大忙。