flask - 将javascript变量传递到jinja2中的宏中

Question

我尝试在$.get()失败时显示简单的错误消息

$.get('{{ url_for(c) }}', function(data) {
  $('#{{ chart_id }}').highcharts(data);
}).fail(function(resp) {
  {# I am not sure why this is not working as intended #}
  {% set error_html = error(resp, c)|replace('\n', '\\\n') %}
  $('#{{ chart_id }}').html('{{ error_html }}');
});

但是，似乎无法访问我的 resp对象，它是一个javascript变量。如何将其传递给宏，就像字典一样？

Answer 1

问题是Jinja在页面加载之前运行：

{# what Jinja sees #}
text ... {{ url_for(c) }} ... text ...
  text ... {{ chart_id }} ... text ...
... text ...
  {# I am not sure why this is not working as intended #}
  {% set error_html = error(resp, c)|replace('\n', '\\\n') %}
  ... text ... {{ chart_id }} ... text ... {{ error_html }} ... text ...
  {# What on earth is `resp`? #}

您实际上并不想在模板级别上编写它，而是采取响应并在JavaScript中使用它：

.fail(function(resp) {
  var displayError = calculateDisplayErrorFromResponse(resp);
  $('#{{ chart_id }}').html(displayError);
});