node.js - 显示图库图像时无法读取每个 null 属性

Question

这是我的 Product 方法，用于在主页上显示与其类别相关的所有产品

//GET Products DEtails
router.get('/:category/:product',function(req,res){

  var galleryImages=null;

  models.Product.findOne({
    where:{slug:req.params.product}
  })
  .then(function(product){
    var galleryDir='public/product_images/' + product.id + '/gallery';
    fs.readdir(galleryDir,function(files){
      galleryImages=files;

      res.render('product',{
        title:product.title,
        p:product,
        galleryImages:galleryImages,


      })
    })
  })

});

这是我的 Product.ejs 文件，用于显示 P.Images 在上面工作但 forEach 循环不起作用无法读取属性 forEach of Null 我的图库图像的路径是正确的

<% include layouts/header  %>

<div class="row">
    <h1 class="page-header"><%= p.title %></h1>
    <div class="col-xs-12 col-md-5">
        <img class="spi" src="/product_images/<%= p.id %>/<%= p.images %>" alt="">
        <br>
    </div>
    <div class="col-xs-12 col-md-7">
        <p><%= p.desc %></p>
        <p>$<%= parseFloat(p.price).toFixed(2) %></p>  
        <p><a href="/cart/add/<%= p.slug %>">Add To Cart</a></p>      
    </div>


    <div class="col-xs-12">
        <ul class="gallery">
            <% galleryImages.forEach(function(images){ %>
            <% if (images != "thumbs") { %>
            <li>
                <!--<a data-fancybox="gallery" href="/product_images/<%= p.id %>/gallery/<%= images %>"> -->
                    <img src="/product_images/<%= p.id %>/gallery/thumbs/<%= images %>" alt="">
                </a>
            </li>
            <% } %>
            <% }); %>
        </ul>
    </div>
</div>
<!-- 
- will gave Content Where as = will gave Html <P>tag in the Browser</P>  -->
<% include layouts/footer  %>

Answer 1

这是我尝试后的 products.js 。有效

/*
 * GET product details by category
 */
router.get('/:category/:product', function (req,res){

    Product.findOne({slug: req.params.product}, function (err, product) {
    if(!product) { //if product not exist in db
        return res.status(404).send('Product not found');
    }else{
        var galleryDir = 'public/product_images/' + product._id + '/gallery';

           fs.readdir(galleryDir, function (err, files) {
               if (err) {
                   console.log(err);
               } else {
                   galleryImages = files;

                   res.render('product', {
                       title: product.title,
                       p: product,
                       galleryImages: galleryImages
                   });
               }
           }); 
    }
    });
});