Question

出于某种原因，在Django管理员中，它不会让我订购/排序（降序）我的价格字段（使用 list_display ）。

可以对其他元素进行排序，但不能对pk外部的元素进行排序。

如何实现

Models.py -------

<?php
  include("connect.php");
  require_once 'Mobile_Detect.php';
  $detect = new Mobile_Detect;
  ini_set('session.cookie_lifetime',900);
  ini_set('session.gc_maxlifetime',900);
  session_start();
  if(isset($_POST['searchbtn'])) {
    $_SESSION['searchterm']=$_POST['searchterm'];
    if(($_SESSION['searchterm'])!="") { header("location:index.php"); }
    else { echo "<script> alert('Please enter something to search for') </script>"; }
  }
?>
<html>
  <head>
    <title>1KaraokeDJ.com Search</title>
    <link rel="stylesheet" href="style.css" />
  </head>
  <body>
    <div class="container">
      <form method="post">
        <p><code>
          <img src="top1.jpg" /><br>
          <?php if ($detect->isMobile()) { echo("Mobile Device Detected"); } else { echo("Desktop Browser Detected"); } ?>
        </code></p>
        <p>
          <?php if(isset($_SESSION['searchterm'])) { ?>
            <input name="searchterm" type="search" value="<?php echo $_SESSION['searchterm'];?>" class="search" />
          <?php } else { ?>
            <input name="searchterm" type="search" placeholder="Enter Search Terms Here"  class="search" />
          <?php } ?>
        </p>
        <p>
          <input name="searchbtn" type="submit" id="searchbtn" class="searchbutton" value="Artist Search"  />
          <input name="searchbtn" type="submit" id="searchbtn" class="searchbutton" value="Title Search"  />
          <input name="searchbtn" type="submit" id="searchbtn" class="searchbutton" value="Disc ID Search"  />
        </p>
        <hr style="width:100%">
        <?php if(isset($_SESSION['searchterm'])) {
          if(($_SESSION['searchterm']!="")) {
            $searchterm=strtoupper($_SESSION['searchterm']);

            print_r($_POST);

            switch ($_POST['searchbtn']) {
              case 'Artist Search':
                $searchresults=$db->query("select * from 1KaraokeDJ where Artist like '%$searchterm%' limit 100");
                break;
              case 'Title Search':
                $searchresults=$db->query("select * from 1KaraokeDJ where Title like '%$searchterm%' limit 100");
                break;
              case 'Disc ID Search':
                $searchresults=$db->query("select * from 1KaraokeDJ where Disc like '%$searchterm%' limit 100");
                break;
            }

            if(mysqli_num_rows($searchresults) > 0) {
              while($descri=mysqli_fetch_object($searchresults)) { ?>
        <div class="reslt">
          <h3 id="results">
            <?php
              echo str_ireplace($searchterm, '<span class="highlight">'.$searchterm."</span>", $descri->Artist);
              echo " - ";
              echo str_ireplace($searchterm, '<span class="highlight">'.$searchterm."</span>", $descri->Title);
            ?>
          </h3>
          <p class="Description">
            <?php
              echo str_ireplace($searchterm, '<span class="highlight">'.$searchterm."</span>", $descri->Brand);
              echo " - ";
              echo str_ireplace($searchterm, '<span class="highlight">'.$searchterm."</span>", $descri->Disc);
              echo " - ";
              echo $descri->Track;
            ?>
          <p>
          <hr>
        </div>
        <?php } ?>
        <div class="reslt">
          <h3 id="results"><?php echo mysqli_num_rows($searchresults) ?> Results</h3>
          <?php if(mysqli_num_rows($searchresults) >= 100) { ?>
            <p class="Description highlight">Showing Up To 100 Results<br>Try Refining Your Search</p><hr> 
          <?php } ?>
        </div>
        <?php   } else { ?>
        <div class="reslt">
          <h3 id="results">Nothing Found!</h3>
          <p class="Description highlight">Try Changing Your Search Terms<p><hr>
        </div>
        <?php } } } ?>
      </form>
      <code>This site is in testing... Things may change anytime<br>and many things may not work for a while!</code>
    </div>
  </body>
</html>

Admin.py --------

class Product(models.Model):
    name = models.CharField ("Name", max_length=400)
    link = models.URLField("Link", max_length=900)

class Variation(models.Model):
    product = models.ForeignKey(Product, blank=False, null=False)
    variation = models.CharField (max_length=80, blank=True, null=True)
    def __str__(self):
        return self.variation

class Price(models.Model):
    price = models.DecimalField("Price", decimal_places=2, max_digits=10)
    variation = models.ForeignKey(Variation, blank=False, null=False)
    updated = models.DateTimeField(auto_now=True)

Answer 1

您无法尝试使用订购属性将admin_order_field添加到管理员的价格字段中，如下所示：

class ProductAdmin(admin.ModelAdmin):
    list_display = ('name',  'price',)
    ordering = ('variation__price',)

    def price(self, obj):
        try:
            price = Price.objects.filter(variation__product=obj)[0].price
        except (ValueError, IndexError):
            None
    else:
        return '${0}'.format(price)
    price.admin_order_field = 'variation__price'

列表显示无法排序/订购（非pk）

1 个答案: