我想我做了一个乱七八糟的JQuery和我的Rails练习,我打算从'form_tag'获取两个参数,然后在我的控制器中在视图中的''中渲染计算结果,我在“网络”视图(Chrome开发人员工具)中看到了结果,但是没有任何内容呈现。下面是相关的代码: 路线:Rails 5没有呈现JQuery结果
get '/calculator', to: 'users#bmi_calc'
users_controller.rb:
def bmi_calc
bmi_table = {
"Very severely underweight" => { from: 0.0, to: 15.0 },
"Severely underweight" => { from: 15.1, to: 16.0 },
"Underweight" => { from: 16.1, to: 18.5 },
"Normal (healthy weight)" => { from: 18.51, to: 25.0 },
"Overweight" => { from: 25.1, to: 30.0 },
"Obese class I (moderately obese)" => { from: 30.1, to: 35.0 },
"Obese class II (severely obese)" => { from: 35.1, to: 40.0 },
"Obese class III (very severely obese)" => { from: 40.1, to: 60.0 },
"Pure fat factor" => { from: 60.1, to: 100.0}
}
weight = params[:mass].to_f
height = params[:height].to_f
if weight > 0 && height > 0
resultado = ''
@bmi = weight/height ** 2
bmi_table.each do |advice, range|
if (@bmi > range[:from]) && (@bmi < range[:to])
resultado = advice
end
end
respond_to do |format|
format.json { render json: {resultado: resultado} }
end
else
redirect_to current_user
end
end
users.js.erb:
$(document).ready(function(){
$("#calculator-img").click(function(){
$.getJSON('/calculator', function(data) {
var res = data.resultado;
$("#bmi-result").html(res);
});
});
});
用户/ show.html.erb:
<div class="row">
<aside class="col-md-4">
<section class="user_info">
<h1><%= @user.name %></h1>
</section>
<section class="bmi_form">
<%= render 'bmi_form' %>
</section>
<div id="bmi-result">
</div>
</aside>
<div class="col-md-6">
<section class="mid_section">
<p>Some text</p>
<h2>BMI standard table</h2>
<%= image_tag "BMItable.png", alt: "BMI stardard table" %>
</section>
</div>
</div>
_bmi_form.html.erb:
<%= form_tag calculator_path, method: "get", remote: true, class: "navbar-left" do %>
<%= label_tag :mass, "Your mass (weight) in Kg" %>
<%= number_field_tag :mass, params[:mass], step: 0.01, class: "form-control" %>
<%= label_tag :height, "Your height in meters" %>
<%= number_field_tag :height, params[:height], step: 0.01, class: "form-control" %>
<%= image_submit_tag("BMI.gif", id: "calculator-img") %>
<% end %>
最后,这是我在Chrome开发者工具得到:
普莱舍帮助我理解我在做什么错。感谢 (这是我要解决的挑战:https://gist.github.com/JonaMX/d29a754ae625664b0cf7 在我提供的结束,但我不得不呈现一个新的页面,结果...不漂亮的话)
首先检查您的JavaScript是否运行。设置一个'console.log(“Something”);'或'alert(“Something”)''。你已经将表单设置为'remote:true',这意味着ajax请求也可以通过按* submit *来完成,而不仅仅是* onclick *事件。这在请求头中也是可见的。如果'Accept = application/json'比它通过你的JSON请求完成。如果Rails使用'remote:true'事件处理它,我相信它正在请求'Accept = application/javascript',但不要引用我的话。 –