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[英]How to render partial js in views or access instance variables/methods initialized in controller action in js.erb file which is in app/asset
[英]Why does my Controller not pass instance variables for js.erb file?
我正在为来自Rails控制器的实例变量提供的html页面构建一个图表。 我收到的问题是控制器中设置的rails实例变量没有传递到我的相应js.erb文件中。 我尚未确定原因。 有人可以帮助您找出问题所在吗? 下面是代码:
控制者
class VulnerabilitiesController < ApplicationController
helper ProjectsHelper
before_action :set_project_or_fail
before_action :set_best_project_security_set
before_action :set_releases
before_action :set_vulnerabilities
def index
@release_versions = @releases.map { |r| r.version }
end
private
def set_project_or_fail
project_id = params[:project_id] || params[:id]
@project = Project.by_vanity_url_or_id(project_id).take
raise ParamRecordNotFound unless @project
end
def set_best_project_security_set
@best_project_security_set = @project.best_project_security_set
end
def set_releases
@releases = @best_project_security_set.releases.limit(10)
end
def set_vulnerabilities
@vulnerabilities = @best_project_security_set.vulnerabilities
end
end
这是html文件:
vulnerabilities / index.html.haml
<div id="container" style="min-width: 310px; height: 400px; margin: 0 auto"></div>
这是vulnerabilities.js.erb文件的一部分:
$(function () {
$('#container').highcharts({
chart: {
type: 'column'
},
title: {
text: 'Vulnerabilities per Version',
align: 'left',
style: {
color: '#336699',
fontSize: 16
}
},
legend: {
align: 'left',
itemWidth: 127
},
xAxis: {
categories: <%- @release_versions %>
},
...........code.........
@release_versions
每次@release_versions
返回nil。 我努力了
categories: <%- @release_versions %>
categories: [<%- @release_versions %>]
categories: [<%= @release_versions %>]
categories: <%= @release_versions %>
这些变化都没有奏效。 可能是什么问题呢?
要利用Rails控制器填充JS模板所需的数据,您需要直接从JS(或视图模板)中调用控制器动作。
// in a view template or UJS call
<script>
// make an AJAX request to the '/vulnerabilities' URL
$.ajax(...);
</script>
// VulnerabilitiesController#index action is called; index.js.erb template is rendered
// in vulnerabilities/index.js.erb
// here the instance variables from the controller action are defined
$('#container').highcharts({
// ...
xAxis: {
categories: <%- @release_versions %>
},
// ...
};
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