我正在开发一个带有烧瓶服务器和前端vue.js的vizualisation应用程序。
关于这个主题的类似问题寻找一种方法使vue.js和flask变量语法不会像显示here那样进入冲突。
在我的情况下,我想知道是否有任何方法直接使用Flask render_template方法发送变量vue.js变量data.d。
var app = new Vue({
el: '#app',
data: {
'd': {{Flask-variable}}
},
})
这是代码
烧瓶
import os
import flask
import json
from flask import Flask, render_template, request, redirect, url_for
from script_python import kernel as K
def App():
# Initialize the Flask application
app = Flask(__name__)
app.config.from_object('marianaViz.config.ConfigClass')
#return index.html on load
@app.route('/')
def index():
d = [{'x':1, 'y':0, 'z': 1},{'x':1, 'y':0, 'z': 2}]
return flask.render_template("histogram.html",d= flask.jsonify(**K.JSONResponse(data = d,error=False,message='')))
return app
JS
var app = new Vue({
el: '#app',
data: {
'd':{{ d.data|tojson|safe}},
},
created:function(){
this.drawHistogram(d),
},
methods:{
// Called when the Visualization API is loaded.
drawHistogram: function(){
var data = null;
var graph = null;
var self = this;
// Create and populate a data table.
console.log(d);
data = self.d;
//data = [{x:1, y:0, z: 1},{x:1, y:0, z: 2},{x:2, y:0, z: 3},{x:3, y:0, z: 2},{x:4, y:0, z: 1},{x:5, y:0, z: 1},{x:6, y:0, z: 2},{x:7, y:0, z: 3},{x:8, y:0, z: 2},{x:9, y:0, z: 1},{x:10, y:0, z: 1},{x:11, y:0, z: 2},{x:12, y:0, z: 3},{x:13, y:0, z: 2},{x:14, y:0, z: 1},{x:15, y:0, z: 1},{x:16, y:0, z: 2},{x:17, y:0, z: 3},{x:18, y:0, z: 2},{x:19, y:0, z: 1}];
// create some nice looking data with sin/cos
/*
function custom(x, y) {
return (-Math.sin(x/Math.PI) * Math.cos(y/Math.PI) * 10 + 10);
}
var steps = 4; // number of datapoints will be steps*steps
var axisMax = 15;
var axisStep = axisMax / steps;
for (var x = 0; x <= axisMax; x+=axisStep) {
for (var y = 0; y <= axisMax; y+=axisStep) {
var z = custom(x,y);
data.push({x:x, y:0, z: z});
}
console.log(data);
}
*/
// specify options
var options = {
width: '300px',
height: '300px',
style: 'bar',
xBarWidth: 0.5,
yBarWidth: 0.5,
showPerspective: true,
showGrid: true,
showShadow: false,
"showYAxis":false,
"xLabel":'',
"zLabel":'',
cameraPosition: {
horizontal: 0*3.14,
vertical: 0*3.14,
distance: 1.8
},
legendLabel: '',
keepAspectRatio: true,
verticalRatio: 0.5,
"backgroundColor":'black',
"showLegend": true,
"xCenter":'50%',
};
var camera = graph ? graph.getCameraPosition() : null;
// create our graph
var container = document.getElementById('histogram');
graph = new vis.Graph3d(container, data, options);
if (camera) graph.setCameraPosition(camera); // restore camera position
}
}
})
HTML
<!doctype html>
<html>
<head>
<!--Vuejs-->
<script type="text/javascript" src="{{url_for ('static',filename='js/vue.js')}}"></script>
<!--css-->
<link href="{{url_for ('static',filename='css/disp.css')}}" rel="stylesheet" type="text/css"/>
<!--Vis visualisation lib-->
<link href="https://cdnjs.cloudflare.com/ajax/libs/vis/4.19.1/vis.min.css" rel="stylesheet" type="text/css"/>
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/vis/4.19.1/vis.min.js"></script>
<!--<script type="text/javascript" src="/front/lala_web/vis.js"></script>-->
</head>
<body>
<div id="app">
<h2>Histogram:</h2>
<div id="histogram"></div>
</div>
</body >
<!--display.js-->
<script type="text/javascript" src="{{url_for ('static',filename='js/histogram.js')}}"></script>
</html>
答案 0 :(得分:1)
您有许多选项,我将向您展示4适用于简单数据类型(int,字符串等),并且需要更多努力,您还可以使它们适用于更复杂的数据类型(数组,对象等)
只需在脚本标记中分配变量
<script type="text/JavaScript">
#some var from flask
var d_var = "{{somevalue}}"
</script>
然后在你的vue脚本中,你可以做到
var vm = new Vue({
el: '#demo',
data: {
d: d_var
...
其余步骤涉及将变量分配给DOM元素的属性(例如隐藏输入)
在主vue dom元素中创建一个隐藏输入,其值设置为flask变量
<input name="d_elem" type="hidden" value="{{somevalue}}" id="d_elem" />
然后在您的vue脚本中,您现在可以
var d_var = $("#d_elem").val();
var vm = new Vue({
el: '#demo',
data: {
d: d_var
...
如果你遭受JS库疲劳,只需像以前一样创建隐藏的输入,但这次你做
var d_var = document.getElementById("d_elem").value;
var vm = new Vue({
el: '#demo',
data: {
d: d_var
...
使用ref属性
创建隐藏输入<input name="d_elem" type="hidden" value="{{somevalue}}" ref="d_elem" />
在像
这样的vue实例中访问它var d_var = this.$refs.d_elem.value ;
答案 1 :(得分:0)
我认为你可以做点什么
'd':{{ flask_variable|tojson|safe }}
粗糙你的变量需要是json serializeable
您可能必须将json重新解析为js
JSON.parse('{{ flask_variable|tojson|safe }}')
(至少类似的东西),它必须是一个可以转换为json的对象(即python类可能不会工作......字符串和数字应该)