首页 \ 问答 \ 使用嵌套子文档的$ unwind(Using $unwind with nested subdocuments)

使用嵌套子文档的$ unwind(Using $unwind with nested subdocuments)

 我有一个具有以下结构的集合： 
 

{
   {
     node: 'ST20'
     Ds:{
          699:{
                   TotCM: 300
                   Docsis20: 200
                   Docsis30: 100
              }
          705:{
                   TotCM: 250
                   Docsis20: 150
                   Docsis30: 100
              }

        }
   }
   {
     node: 'ST21'
Ds:{
          651:{
                   TotCM: 200
                   Docsis20: 100
                   Docsis30: 100
              }
          699:{
                   TotCM: 100
                   Docsis20: 0
                   Docsis30: 100
              }

        }
   }
}

 

 如您所见，我有一个代表节点的文档。 每个节点都有不同的通道。 我的目标是看看每个频道有多少个有线电视。 从前面开始，我不知道每个节点中的通道。 所以我希望有这样的东西： 
 

{ node: 'ST20', Ds: 699, TotCM: 300, Docsis20: 200, Docsis30:100 }
{ node: 'ST20', Ds: 705, TotCM: 250, Docsis20: 150, Docsis30:100 }
{ node: 'ST21', Ds: 651, TotCM: 200, Docsis20: 100, Docsis30:100 }
{ node: 'ST21', Ds: 699, TotCM: 100, Docsis20: 0,   Docsis30:100 }

 

 我尝试了以下查询： 
 

db.statsNodos.aggregate(
{ $project: {_id:0,Ds:1,node:1}},
{ $unwind: "$Ds"}
).pretty()

 

 但是我得到了原始文件。 而且，正如您所看到的，它们是嵌套文档而不是文档数组。 也许我不必使用$unwind ，还有另一种方法可以解决这个问题。 你能告诉我吗？ 

I have a collection with the following structure:
 

{
   {
     node: 'ST20'
     Ds:{
          699:{
                   TotCM: 300
                   Docsis20: 200
                   Docsis30: 100
              }
          705:{
                   TotCM: 250
                   Docsis20: 150
                   Docsis30: 100
              }

        }
   }
   {
     node: 'ST21'
Ds:{
          651:{
                   TotCM: 200
                   Docsis20: 100
                   Docsis30: 100
              }
          699:{
                   TotCM: 100
                   Docsis20: 0
                   Docsis30: 100
              }

        }
   }
}

 

As you can see, I have a document that represents a node. Each node, has different channels. My objective is see how many cablemodems I have in each channel. From upfront, I don't know the channels that I have in each node. So I would like to have something like this:
 

{ node: 'ST20', Ds: 699, TotCM: 300, Docsis20: 200, Docsis30:100 }
{ node: 'ST20', Ds: 705, TotCM: 250, Docsis20: 150, Docsis30:100 }
{ node: 'ST21', Ds: 651, TotCM: 200, Docsis20: 100, Docsis30:100 }
{ node: 'ST21', Ds: 699, TotCM: 100, Docsis20: 0,   Docsis30:100 }

 

I tried the following query:
 

db.statsNodos.aggregate(
{ $project: {_id:0,Ds:1,node:1}},
{ $unwind: "$Ds"}
).pretty()

 

But I get the original document. And, as you can see, they are nested documents and not an array of documents. Maybe I don't have to use $unwind and there is another way to get this. Can you tell me?

原文：https://stackoverflow.com/questions/46286550
更新时间：2024-04-21 13:04

最满意答案

 这是因为您需要对click事件应用更改。 因此，您可以添加此代码以在每次单击章节时调整视频大小（您可以添加一些延迟以确保获得正确的大小）： 
 

$('ul.nav-tabs a').click(function() {
  setTimeout(function() {
    var vidHeight = $('.video-container').height();
    $('.description').css('height', vidHeight + 'px');
  }, 500);

});

 

 您还可以使用$(document).ready函数，以确保调整大小代码在页面加载时运行良好。 
 

 完整代码： 
 

 

 
 
 
  
$(document).ready(function() {
  setTimeout(function() {
    var vidHeight = $('.video-container').height();
    $('.description').css('height', vidHeight + 'px');
  }, 500);
  $(window).resize(function() {
    var vidHeight = $('.video-container').height();
    $('.description').css('height', vidHeight + 'px');
  });

  $('ul.nav-tabs a').click(function() {
    setTimeout(function() {
      var vidHeight = $('.video-container').height();
      $('.description').css('height', vidHeight + 'px');
    }, 500);

  });
});
 
  
/* Tools */

.no-padding {
  padding: 0!important;
}

.slow-effect {
  transition: all .2s ease-in-out;
  -webkit-transition: all .2s ease-in-out;
}


/* ======================================================================================= */


/* Layout ================================================================================ */

.space {
  height: 50px;
}

.container-fluid {
  padding: 0 4%;
}


/* Global Styles ========================================================================= */


/* Form Elements */


/*start places*/

body {
  height: 2000px;
}

.main-container {
  border: 2px solid #000;
  overflow: hidden;
}

.description {
  background-color: #898989;
  padding: 16px 30px;
  overflow: auto;
}

.description ul {
  margin: 0;
  padding: 0;
}

.description ul li a {
  background-color: #898989;
  color: #fff;
  padding-bottom: 18px;
  margin-bottom: 18px;
  position: relative;
  border: none;
}

.nav-tabs>li>a:hover {
  border: none;
  border-bottom: 2px solid #fff;
  background-color: #fff;
  color: #555555;
}

.description ul li a>h2 {
  font-weight: 700;
  font-size: 35px;
  margin: 0;
}

.description ul li a>p {
  font-size: 18px;
  line-height: 30px;
  margin-top: 5px;
  margin-bottom: 0;
}

.video-container {
  position: relative;
}

.video-container .tools {
  position: absolute;
  width: 100%;
  height: 40px;
  background-color: #a4a4a4;
  left: 0;
  bottom: 0;
  z-index: 999;
}

.video-container:hover .tools {
  visibility: hidden;
}

#style-1::-webkit-scrollbar {
  background-color: #898989;
}

#style-1::-webkit-scrollbar-thumb {
  border-radius: 10px;
  -webkit-box-shadow: inset 0 0 6px rgba(0, 0, 0, .3);
  background-color: #adadad
}

#style-1::-webkit-scrollbar {
  width: 20px;
}

@media(min-width: 992px) {
  .description {
    border-left: 2px solid #000;
  }
  .description ul li a {
    border-bottom: 2px solid #fff;
  }
}

@media(max-width: 991px) {
  .description {
    border-left: 2px solid #000;
    white-space: nowrap;
    padding: 0;
    height: auto!important;
  }
  .description ul li a {
    display: inline-block;
    width: 34%;
    padding: 14px;
    text-align: left;
    overflow: hidden;
    min-height: 252px;
    white-space: normal;
    vertical-align: text-top;
    margin-bottom: 0;
  }
  .description ul li:after {
    content: "";
    display: inline-block;
    width: 2px;
    height: 170px;
    position: absolute;
    right: 6px;
    top: 20px;
    background-color: #fff;
  }
  .description ul li:last-child:after {
    content: "";
    display: none;
  }
  .description ul li a>h2 {
    font-size: 22px;
  }
  .description ul li a>p {
    font-size: 14px;
    line-height: 23px;
  }
}

@media screen and (min-width: 220px) and (max-width: 550px) {
  .description ul li a {
    padding: 8px;
    min-height: 200px;
  }
  .description ul li a h2 {
    font-size: 14px;
  }
  .description ul li a p {
    font-size: 10px;
    line-height: 16px;
  }
}
 
  
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<div class="container-fluid">
  <div class="row">
    <div class="space"></div>
    <div id="exTab2" class="col-xs-12 no-padding main-container">
      <div class="col-md-9 no-padding video-container tab-content">
        <div id="1" class="tabs-container tab-pane fade in active">
          <!-- Item-1 -->
          <div class="tools slow-effect"></div><video controls="" width="100%"><source src="https://www.w3schools.com/html/mov_bbb.mp4" type="video/mp4"> <source src="test.ogg" type="video/ogg"> Your browser does not support HTML5 video.</video>
        </div>
        <div id="2" class="tabs-container tab-pane fade">
          <!-- Item-2 -->
          <div class="tools slow-effect"></div><video controls="" width="100%"><source src="https://www.w3schools.com/html/movie.mp4" type="video/mp4"> <source src="mov_bbb.ogg" type="video/ogg"> Your browser does not support HTML5 video.</video>
        </div>
        <div id="3" class="tabs-container tab-pane fade">
          <!-- Item-3 -->
          <div class="tools slow-effect"></div><video controls="" width="100%"><source src="movie.mp4" type="video/mp4"> <source src="movie.ogg" type="video/ogg"> Your browser does not support HTML5 video.</video>
        </div>
        <div id="4" class="tabs-container tab-pane fade">
          <!-- Item-4 -->
          <div class="tools slow-effect"></div><video controls="" width="100%"><source src="test.WEBM" type="video/mp4"> <source src="test.ogg" type="video/ogg"> Your browser does not support HTML5 video.</video>
        </div>
      </div>
      <!-- Item-2 -->
      <div class="col-md-3 description" id="style-1">
        <ul class="nav nav-tabs">
          <li class="active">
            <a data-toggle="tab" href="#1">
              <h2>Chapter 1</h2>
              <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. A non velit, illo vel neque sunt doloremque incidunt.</p>
            </a>
          </li>
          <li>
            <a data-toggle="tab" href="#2">
              <h2>Chapter 2</h2>
              <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. A non velit, illo vel neque sunt, rerum doloremque incidunt laudantium aliquid itaque cum error nobis.</p>
            </a>
          </li>
          <li>
            <a data-toggle="tab" href="#3">
              <h2>Chapter 3</h2>
              <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. A non velit.</p>
            </a>
          </li>
          <li>
            <a data-toggle="tab" href="#4">
              <h2>Chapter 4</h2>
              <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. A non velit, illo vel neque sunt, rerum doloremque incidunt laudantium aliquid itaque.</p>
            </a>
          </li>
        </ul>
      </div>
    </div>
  </div>
</div>
 
 
 

 


It's because you need to apply the change on the click event. So you may add this code to resize the video each time you click on a chapter (you may add some delay to be sure you get the correct size) :
 

$('ul.nav-tabs a').click(function() {
  setTimeout(function() {
    var vidHeight = $('.video-container').height();
    $('.description').css('height', vidHeight + 'px');
  }, 500);

});

 

You may also use $(document).ready function in order to be sure the resize code works well at page load.
 

Full code :
 

 

 
 
 
  
$(document).ready(function() {
  setTimeout(function() {
    var vidHeight = $('.video-container').height();
    $('.description').css('height', vidHeight + 'px');
  }, 500);
  $(window).resize(function() {
    var vidHeight = $('.video-container').height();
    $('.description').css('height', vidHeight + 'px');
  });

  $('ul.nav-tabs a').click(function() {
    setTimeout(function() {
      var vidHeight = $('.video-container').height();
      $('.description').css('height', vidHeight + 'px');
    }, 500);

  });
});
 
  
/* Tools */

.no-padding {
  padding: 0!important;
}

.slow-effect {
  transition: all .2s ease-in-out;
  -webkit-transition: all .2s ease-in-out;
}


/* ======================================================================================= */


/* Layout ================================================================================ */

.space {
  height: 50px;
}

.container-fluid {
  padding: 0 4%;
}


/* Global Styles ========================================================================= */


/* Form Elements */


/*start places*/

body {
  height: 2000px;
}

.main-container {
  border: 2px solid #000;
  overflow: hidden;
}

.description {
  background-color: #898989;
  padding: 16px 30px;
  overflow: auto;
}

.description ul {
  margin: 0;
  padding: 0;
}

.description ul li a {
  background-color: #898989;
  color: #fff;
  padding-bottom: 18px;
  margin-bottom: 18px;
  position: relative;
  border: none;
}

.nav-tabs>li>a:hover {
  border: none;
  border-bottom: 2px solid #fff;
  background-color: #fff;
  color: #555555;
}

.description ul li a>h2 {
  font-weight: 700;
  font-size: 35px;
  margin: 0;
}

.description ul li a>p {
  font-size: 18px;
  line-height: 30px;
  margin-top: 5px;
  margin-bottom: 0;
}

.video-container {
  position: relative;
}

.video-container .tools {
  position: absolute;
  width: 100%;
  height: 40px;
  background-color: #a4a4a4;
  left: 0;
  bottom: 0;
  z-index: 999;
}

.video-container:hover .tools {
  visibility: hidden;
}

#style-1::-webkit-scrollbar {
  background-color: #898989;
}

#style-1::-webkit-scrollbar-thumb {
  border-radius: 10px;
  -webkit-box-shadow: inset 0 0 6px rgba(0, 0, 0, .3);
  background-color: #adadad
}

#style-1::-webkit-scrollbar {
  width: 20px;
}

@media(min-width: 992px) {
  .description {
    border-left: 2px solid #000;
  }
  .description ul li a {
    border-bottom: 2px solid #fff;
  }
}

@media(max-width: 991px) {
  .description {
    border-left: 2px solid #000;
    white-space: nowrap;
    padding: 0;
    height: auto!important;
  }
  .description ul li a {
    display: inline-block;
    width: 34%;
    padding: 14px;
    text-align: left;
    overflow: hidden;
    min-height: 252px;
    white-space: normal;
    vertical-align: text-top;
    margin-bottom: 0;
  }
  .description ul li:after {
    content: "";
    display: inline-block;
    width: 2px;
    height: 170px;
    position: absolute;
    right: 6px;
    top: 20px;
    background-color: #fff;
  }
  .description ul li:last-child:after {
    content: "";
    display: none;
  }
  .description ul li a>h2 {
    font-size: 22px;
  }
  .description ul li a>p {
    font-size: 14px;
    line-height: 23px;
  }
}

@media screen and (min-width: 220px) and (max-width: 550px) {
  .description ul li a {
    padding: 8px;
    min-height: 200px;
  }
  .description ul li a h2 {
    font-size: 14px;
  }
  .description ul li a p {
    font-size: 10px;
    line-height: 16px;
  }
}
 
  
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<div class="container-fluid">
  <div class="row">
    <div class="space"></div>
    <div id="exTab2" class="col-xs-12 no-padding main-container">
      <div class="col-md-9 no-padding video-container tab-content">
        <div id="1" class="tabs-container tab-pane fade in active">
          <!-- Item-1 -->
          <div class="tools slow-effect"></div><video controls="" width="100%"><source src="https://www.w3schools.com/html/mov_bbb.mp4" type="video/mp4"> <source src="test.ogg" type="video/ogg"> Your browser does not support HTML5 video.</video>
        </div>
        <div id="2" class="tabs-container tab-pane fade">
          <!-- Item-2 -->
          <div class="tools slow-effect"></div><video controls="" width="100%"><source src="https://www.w3schools.com/html/movie.mp4" type="video/mp4"> <source src="mov_bbb.ogg" type="video/ogg"> Your browser does not support HTML5 video.</video>
        </div>
        <div id="3" class="tabs-container tab-pane fade">
          <!-- Item-3 -->
          <div class="tools slow-effect"></div><video controls="" width="100%"><source src="movie.mp4" type="video/mp4"> <source src="movie.ogg" type="video/ogg"> Your browser does not support HTML5 video.</video>
        </div>
        <div id="4" class="tabs-container tab-pane fade">
          <!-- Item-4 -->
          <div class="tools slow-effect"></div><video controls="" width="100%"><source src="test.WEBM" type="video/mp4"> <source src="test.ogg" type="video/ogg"> Your browser does not support HTML5 video.</video>
        </div>
      </div>
      <!-- Item-2 -->
      <div class="col-md-3 description" id="style-1">
        <ul class="nav nav-tabs">
          <li class="active">
            <a data-toggle="tab" href="#1">
              <h2>Chapter 1</h2>
              <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. A non velit, illo vel neque sunt doloremque incidunt.</p>
            </a>
          </li>
          <li>
            <a data-toggle="tab" href="#2">
              <h2>Chapter 2</h2>
              <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. A non velit, illo vel neque sunt, rerum doloremque incidunt laudantium aliquid itaque cum error nobis.</p>
            </a>
          </li>
          <li>
            <a data-toggle="tab" href="#3">
              <h2>Chapter 3</h2>
              <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. A non velit.</p>
            </a>
          </li>
          <li>
            <a data-toggle="tab" href="#4">
              <h2>Chapter 4</h2>
              <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. A non velit, illo vel neque sunt, rerum doloremque incidunt laudantium aliquid itaque.</p>
            </a>
          </li>
        </ul>
      </div>
    </div>
  </div>
</div>

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