Django查询数据库并将数据发送到模板
我还是Django/web开发新手，但有Python和PSQL方面的经验 我有一个psql数据库，其中的一个表具有股票投资组合的id、日期和值。该表的标题为absolutedollarvalue 我想将数据发送到模板，然后使用Highcharts.JS将其绘制成图形。据我所知，我需要设置models.py来查询安装在Django中的数据库，将其转换为JSON，然后将其发送到模板进行绘图 有人能告诉我这是否是获取id、日期和值的正确语法，以及如何将json格式的日期和值发送到模板吗 这是适用的模型零件：Django查询数据库并将数据发送到模板,django,postgresql,django-models,highcharts,django-views,Django,Postgresql,Django Models,Highcharts,Django Views,我还是Django/web开发新手，但有Python和PSQL方面的经验 我有一个psql数据库，其中的一个表具有股票投资组合的id、日期和值。该表的标题为absolutedollarvalue 我想将数据发送到模板，然后使用Highcharts.JS将其绘制成图形。据我所知，我需要设置models.py来查询安装在Django中的数据库，将其转换为JSON，然后将其发送到模板进行绘图 有人能告诉我这是否是获取id、日期和值的正确语法，以及如何将json格式的日期和值发送到模板吗 这是适用的模型
class Absolutedollarvalue(models.Model):
cik = models.CharField(max_length=16)
date = models.DateField()
value = models.DecimalField(max_digits=65535, decimal_places=65535)
class Meta:
managed = False
db_table = 'absolutedollarvalue'
from django.shortcuts import render
from django.http import HttpResponse
from django.db import connection
from toa.models import Absolutedollarvalue as adv
import psycopg2
import json
import datetime
def adv(request):
adv.objects
a = adv(id = '1103804')
return render(request,toa/graphs.html,a)
<html>
<head>
<title> Fund Performance </title>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.2/jquery.min.js"></script>
<script src="http://code.highcharts.com/highcharts.js"></script>
</head>
<body>
<div id="chart_container" style="width:100%; height:400px;"></div>
<script type="text/javascript">
$(document).ready(function() {
var absolutedollarval = {
chart: {
renderTo: 'chart_panel',
type: 'time-series',
},
legend: {enabled: false},
title: {text: 'Daily NAV'},
xAxis: {title:{text:'Date'}},
yAxis: {title: {text: 'dollar value'}}
};
var chartDataUrl = "{% url 'chart_data_json' %}?name = avg_by_day"
+"&days=14";
$.getJSON(chartDataUrl,
function(data){
absolutedollarval.xAxis.categories=
absolutedollarval.series[0].name =
absolutedollarval.series[0].data =
var chart = new Highcharts.Chart(absolutedollarval);
});
});
</script>
</body>
</html>
from django.core import serializers
def adv(request):
adv.objects
a = adv(id = '1103804') #Will fetch all the column
a = adv(id = '1103804').values('columnName') #Will fetch the particular column.
data = serializers.serialize('json', a)
context = Context(data)
return render(request,'toa/graphs.html',context)
render(request, "foo.html", {'jsonKey': jsonValue}) #For passing individual JSON
将JSON格式的值发送到模板：
<html>
<head>
<title> Fund Performance </title>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.2/jquery.min.js"></script>
<script src="http://code.highcharts.com/highcharts.js"></script>
</head>
<body>
<div id="chart_container" style="width:100%; height:400px;"></div>
<script type="text/javascript">
$(document).ready(function() {
var absolutedollarval = {
chart: {
renderTo: 'chart_panel',
type: 'time-series',
},
legend: {enabled: false},
title: {text: 'Daily NAV'},
xAxis: {title:{text:'Date'}},
yAxis: {title: {text: 'dollar value'}}
};
var chartDataUrl = "{% url 'chart_data_json' %}?name = avg_by_day"
+"&days=14";
$.getJSON(chartDataUrl,
function(data){
absolutedollarval.xAxis.categories=
absolutedollarval.series[0].name =
absolutedollarval.series[0].data =
var chart = new Highcharts.Chart(absolutedollarval);
});
});
</script>
</body>
</html>
from django.core import serializers
def adv(request):
adv.objects
a = adv(id = '1103804') #Will fetch all the column
a = adv(id = '1103804').values('columnName') #Will fetch the particular column.
data = serializers.serialize('json', a)
context = Context(data)
return render(request,'toa/graphs.html',context)
render(request, "foo.html", {'jsonKey': jsonValue}) #For passing individual JSON
你的
advadv.objects.filter（cik='1103804'）。values（'Column1'，'Column2'）render（请求，“foo.html”，{jsonKey'：jsonValue}）