前端使用flask render_template制作highchart [英] using flask render_template to make a highchart on the front end

问题描述

我有一个简单的python方法，它将生成一个highcharts json

I have a simple python method which will generate a highcharts json

@app.route('/make/a/chart')
def make_chart():
  data = get_data()
  c = Counter
  for each in data:
    c['AGE'] += 1

  highchart_json = {
    'chart': {
      'type': 'column'
    }
    'title': {
      'text': 'arranged by age'
    }
    'x-axis': {
      'categories': [x for x in c]
    }
    'series': {
      'name': 'Groups By Age',
      'data': [c[x] for x in c]
    }
  }
  return render_template('some_template.html', json=highchart_json)

是否可以使用模板渲染它，或者是通过将其json化并将其发送到前端将其变成高图的唯一真正方法?

is it possible to have it render with a template, or is the only real way to turn it into a highchart by jsonifying it and sendng it to the front end?

推荐答案

可以将 JSON 作为 Javascript 结构放入模板中:

You can put JSON into a template as a Javascript structure:

<script type="text/javascript">
    var chart_data = {{ highchart_json|tojson|safe }};
</script>

然后你可以在你的 JS 代码中使用这个客户端.毕竟，JSON 是 JavaScript 的一个子集，或者至少是 Python json 模块生成的 JSON.

and you can then use this client-side in your JS code. JSON is a subset of JavaScript, after all, or at least the JSON produced by the Python json module is.

这使用 Flask tojson 过滤器，生成HTML 安全 JSON 值；使用 JSON uxxxx 转义码为您转义任何 HTML 元字符.

This uses the Flask tojson filter, which produces HTML safe JSON values; any HTML-metacharacters are escaped for you using JSON uxxxx escape codes.

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