我有一个Node网络应用,最近开始为数据整合ChartJS库,以下是我在一个EJS模板页面的脚本标签中嵌套的内容。
<script>
let playerStatChart = new Chart(myChart, {
type: 'bar',
data: {
labels: ['Freshman', 'Sophomore', 'Junior', 'Senior'],
datasets: [{
label: 'Points',
// Works
data: [1,2,3,4],
// Does not work and appears blank
// One of these data lines is commented out, so there isn't a redundancy
data: pointAvg,
backgroundColor: 'rgb(149,16,16, 0.4)',
borderWidth: 1,
borderColor: '#000',
hoverBorderWidth: 3,
hoverBorderColor: '#000'
}]
},
options: {
title: {
display: true,
text: "Points: <%= player.name %>",
fontSize: 25
},
scales: {
yAxes: [{
ticks: {
beginAtZero: true
}
}]
}
}
});
</script>
我试图动态地填充数据中的值。资料 是数据集的,而不是包含[1, 2, 3, 4]的预定义数组。 正如你所看到的,我已经通过注入EJS值来动态填充图表的标题作为播放器名称。 这是我正在使用的一个 "球员 "对象的例子。
author: { id: 5e939f988ced3e0428c8b521, username: 'test' },
comments: [
{
author: [Object],
_id: 5eb31d2ea285dbf1f3eb6d80,
text: 'Threesus forever.',
createdAt: 2020-05-06T20:25:18.332Z,
__v: 0
}
],
_id: 5e94ac2d81fa5428b0323fc1,
name: 'Naz Mitrou-Long',
image: 'https://alchetron.com/cdn/naz-long-b96e0ac4-b460-4dd7-ab76-de54cccbd62-resize-750.jpeg',
position: 'Guard',
description: 'Threesus of Nazareth',
__v: 6,
weight: 218,
dob: 1993-08-03T05:00:00.000Z,
hometown: 'Mississauga, ON',
country: 'Canada',
height_feet: 6,
height_inches: 4,
season: [
{
year: '2012-2013',
grade: 'Freshman',
gp: 18,
gs: 0,
mpg: 6.9,
fg: 0.348,
tp: 0.278,
ft: 1,
rpg: 0.8,
apg: 1,
spg: 0.3,
bpg: 0,
ppg: 1.4
},
{
year: '2013-2014',
grade: 'Sophomore',
gp: 36,
gs: 7,
mpg: 20.3,
fg: 0.432,
tp: 0.4,
ft: 0.643,
rpg: 1.6,
apg: 1.1,
spg: 0.2,
bpg: 0.1,
ppg: 7.1
},
{
year: '2014-2015',
grade: 'Junior',
gp: 34,
gs: 33,
mpg: 27.5,
fg: 0.449,
tp: 0.391,
ft: 0.755,
rpg: 2.9,
apg: 2,
spg: 0.8,
bpg: 0.1,
ppg: 10.1
},
{
year: '2015-2016',
grade: 'R. Senior',
gp: 8,
gs: 8,
mpg: 31.6,
fg: 0.425,
tp: 0.291,
ft: 0.6,
rpg: 2.9,
apg: 1.9,
spg: 0.6,
bpg: 0.3,
ppg: 12
},
{
year: '2016-2017',
grade: 'Senior',
gp: 35,
gs: 35,
mpg: 33.3,
fg: 0.473,
tp: 0.384,
ft: 0.795,
rpg: 4.6,
apg: 2.7,
spg: 1.2,
bpg: 0,
ppg: 15.1
}
]
我如何才能循环浏览每个球员的 "赛季 "值 并动态填充图表数据,就像图表标题一样。 下面是我一直在玩的一个例子,也在上图所示代码前面的脚本标签中。
let player = "<%= player %>"
let pointAvg = []
player.season.forEach(function(season){
pointAvg.push(season.ppg)
})
然而,当我使用这段代码并将数据值设置为: pointAvg
图表显示空白,没有数值。 我在这里遗漏了什么?
映射你的对象赛季数组并返回pgp属性。通过使用map,你可以避免使用额外的pointAvg数组。
const input = {
_id: '5e94 ac2d81fa5428b0323fc1',
name: 'Naz Mitrou-Long',
image: 'https://alchetron.com/cdn/naz-long-b96e0ac4-b460-4dd7-ab76-de54cccbd62-resize-750.jpeg',
position: 'Guard',
description: 'Threesus of Nazareth',
__v: 6,
weight: 218,
hometown: 'Mississauga, ON',
country: 'Canada',
height_feet: 6,
height_inches: 4,
season: [{
year: '2012-2013',
grade: 'Freshman',
gp: 18,
gs: 0,
mpg: 6.9,
fg: 0.348,
tp: 0.278,
ft: 1,
rpg: 0.8,
apg: 1,
spg: 0.3,
bpg: 0,
ppg: 1.4
},
{
year: '2013-2014',
grade: 'Sophomore',
gp: 36,
gs: 7,
mpg: 20.3,
fg: 0.432,
tp: 0.4,
ft: 0.643,
rpg: 1.6,
apg: 1.1,
spg: 0.2,
bpg: 0.1,
ppg: 7.1
},
{
year: '2014-2015',
grade: 'Junior',
gp: 34,
gs: 33,
mpg: 27.5,
fg: 0.449,
tp: 0.391,
ft: 0.755,
rpg: 2.9,
apg: 2,
spg: 0.8,
bpg: 0.1,
ppg: 10.1
},
{
year: '2015-2016',
grade: 'R. Senior',
gp: 8,
gs: 8,
mpg: 31.6,
fg: 0.425,
tp: 0.291,
ft: 0.6,
rpg: 2.9,
apg: 1.9,
spg: 0.6,
bpg: 0.3,
ppg: 12
},
{
year: '2016-2017',
grade: 'Senior',
gp: 35,
gs: 35,
mpg: 33.3,
fg: 0.473,
tp: 0.384,
ft: 0.795,
rpg: 4.6,
apg: 2.7,
spg: 1.2,
bpg: 0,
ppg: 15.1
}
]
}
const result = input.season.map(({
ppg
}) => ppg);
console.log(result)