如何在 Vue 中渲染图表数据集?
How to Render Chart Datasets in Vue?
我目前正在制作一个报告页面,目前正在努力如何将数据集呈现到我的条形图。我在向图表显示静态数据时没有问题,但是当我使用 axios 时它不起作用。我阅读了有关使用观察者和安装的解决方案。但是如果我的 BarChart 在另一个组件中,我不知道如何应用它。
这是我的条形图代码:
import { Bar } from "vue-chartjs";
export default {
name: "BarChart",
extends: Bar,
data() {
return {};
},
props: {
label: {
type: Array,
},
chartData: {
type: Array,
},
options: {
type: Object,
},
},
mounted() {
const dates = this.chartData.map((d) => d.date);
const totalCheckIn = this.chartData.map((d) => d.totalCheckIn);
const totalCheckOut = this.chartData.map((d) => d.totalCheckout);
this.renderChart(
{
labels: dates,
datasets: [
{
label: this.label[0],
data: totalCheckIn,
},
{
label: this.label[1],
data: totalCheckOut,
},
],
},
this.options
);
},
};
在我的报告组件中,我是这样使用它的:
<BarChart
v-bind:chartData="checkIn"
v-bind:options="checkInOptions"
v-bind:label="checkInLabel"
></BarChart>
import BarChart from "../components/BarChart";
export default {
name: "Reports",
components: { BarChart },
data() {
return {
checkInOptions: {
responsive: true,
maintainAspectRatio: false,
},
checkIn: [
{ date: "1", totalCheckIn: "2", totalCheckout: "2" },
{ date: "2", totalCheckIn: "1", totalCheckout: "2" },
],
checkInLabel: ["Check In", "CheckOut"],
}
},
beforeMount() {
axios
.get('http://localhost:3000/monthly-checkin/'+this.month+'/'+this.year+'')
.then((res) => {
this.checkIn = res.data.monthly;
console.log(this.checkIn)
})
.catch((err) => {
console.log(err.response.data.message);
});
}
}
请帮忙
在您的 BarChart
组件中使用 watch
,如下所示:
watch:{
chartData:function(newVal,OldVal){
//assign chart data
},
},
之后您需要执行可以更新条形图数据的方法。下面是完整的片段。
import { Bar } from "vue-chartjs";
export default {
name: "BarChart",
extends: Bar,
data() {
return {};
},
props: {
label: {
type: Array,
},
chartData: {
type: Array,
},
options: {
type: Object,
},
},
watch: {
chartData: function (newVal, OldVal) {
this.updateChart()
},
},
mounted() {
this.updateChart()
},
methods: {
updateChart() {
const dates = this.chartData.map((d) => d.date);
const totalCheckIn = this.chartData.map((d) => d.totalCheckIn);
const totalCheckOut = this.chartData.map((d) => d.totalCheckout);
this.renderChart(
{
labels: dates,
datasets: [
{
label: this.label[0],
data: totalCheckIn,
},
{
label: this.label[1],
data: totalCheckOut,
},
],
},
this.options
);
}
}
};
我目前正在制作一个报告页面,目前正在努力如何将数据集呈现到我的条形图。我在向图表显示静态数据时没有问题,但是当我使用 axios 时它不起作用。我阅读了有关使用观察者和安装的解决方案。但是如果我的 BarChart 在另一个组件中,我不知道如何应用它。
这是我的条形图代码:
import { Bar } from "vue-chartjs";
export default {
name: "BarChart",
extends: Bar,
data() {
return {};
},
props: {
label: {
type: Array,
},
chartData: {
type: Array,
},
options: {
type: Object,
},
},
mounted() {
const dates = this.chartData.map((d) => d.date);
const totalCheckIn = this.chartData.map((d) => d.totalCheckIn);
const totalCheckOut = this.chartData.map((d) => d.totalCheckout);
this.renderChart(
{
labels: dates,
datasets: [
{
label: this.label[0],
data: totalCheckIn,
},
{
label: this.label[1],
data: totalCheckOut,
},
],
},
this.options
);
},
};
在我的报告组件中,我是这样使用它的:
<BarChart
v-bind:chartData="checkIn"
v-bind:options="checkInOptions"
v-bind:label="checkInLabel"
></BarChart>
import BarChart from "../components/BarChart";
export default {
name: "Reports",
components: { BarChart },
data() {
return {
checkInOptions: {
responsive: true,
maintainAspectRatio: false,
},
checkIn: [
{ date: "1", totalCheckIn: "2", totalCheckout: "2" },
{ date: "2", totalCheckIn: "1", totalCheckout: "2" },
],
checkInLabel: ["Check In", "CheckOut"],
}
},
beforeMount() {
axios
.get('http://localhost:3000/monthly-checkin/'+this.month+'/'+this.year+'')
.then((res) => {
this.checkIn = res.data.monthly;
console.log(this.checkIn)
})
.catch((err) => {
console.log(err.response.data.message);
});
}
}
请帮忙
在您的 BarChart
组件中使用 watch
,如下所示:
watch:{
chartData:function(newVal,OldVal){
//assign chart data
},
},
之后您需要执行可以更新条形图数据的方法。下面是完整的片段。
import { Bar } from "vue-chartjs";
export default {
name: "BarChart",
extends: Bar,
data() {
return {};
},
props: {
label: {
type: Array,
},
chartData: {
type: Array,
},
options: {
type: Object,
},
},
watch: {
chartData: function (newVal, OldVal) {
this.updateChart()
},
},
mounted() {
this.updateChart()
},
methods: {
updateChart() {
const dates = this.chartData.map((d) => d.date);
const totalCheckIn = this.chartData.map((d) => d.totalCheckIn);
const totalCheckOut = this.chartData.map((d) => d.totalCheckout);
this.renderChart(
{
labels: dates,
datasets: [
{
label: this.label[0],
data: totalCheckIn,
},
{
label: this.label[1],
data: totalCheckOut,
},
],
},
this.options
);
}
}
};