Question

我有一个django模型实例的列表，但是，其中一些可能是重复的，如何获取所有实例都不同的列表？

这不是查询集，而是列表，例如：

instances = [instance1, instance2, ...]

我可以对实例做些什么来保证所有实例都是唯一的？

Answer 1

如果要使用对象的固有相等性，可以使用集转换：

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs"     Inherits="_Default" %>

<!doctype html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head2" runat="server">
<title>Foundation | Welcome</title>
<link rel="stylesheet" href="css/foundation.css" />
<link rel="stylesheet" href="css/motion-ui.css" />
<link rel="stylesheet" href="css/style.css" />
<link href="script/motion-ui-starter/css/animate.css" rel="stylesheet" />


<link href="script/motion-ui-starter/css/motion-ui.css" rel="stylesheet" />

<link href="script/motion-ui-starter/css/foundation.css" rel="stylesheet" />
<link href="script/motion-ui-starter/css/style.css" rel="stylesheet" />
<script src="script/motion-ui-starter/js/vendor/modernizr.js"></script>

<style>
    .animated {
        animation-duration: 2s;
        animation-delay: 0s;
        animation-iteration-count: 1;
    }

    .flash {
        animation-delay: 3s;
    }

    .auto-style1 {
        width: 100%;
        border: 2px solid #000066;
        background-color: #cccccc;
    }

    .auto-style4 {
        width: 513px;
        height: 44px;
    }

    .auto-style7 {
        height: 52px;
        text-align: center;
        color: #FFFFFF;
    }

    .auto-style9 {
        height: 44px;
        width: 1403px;
    }

    .auto-style10 {
        height: 53px;
    }
</style>
<script src="script/motion-ui-starter/js/script.js"></script>
<script src="script/motion-ui-starter/js/foundation.min.js"></script>
<script src="script/motion-ui-starter/js/vendor/jquery.js"></script>
<script src="script/motion-ui-starter/js/vendor/motion-ui.js"></script>

<script src="script/motion-ui-starter/css/Java.min.js"></script>
<script>
    $('#div').ready(function () {
        $('#div').addClass('animated bounceInLeft');

    });

    $('#TextBox1').on('click', function () {
        $('#TextBox1').addClass('animated shake');

    });
</script>
</head>
<body>

<form id="form1" runat="server">
    <div style="position: absolute; top: 63px; left: 2px; width: 280px; height: 203px; bottom: 513px;" id="div">
        <table class="auto-style1">
            <tr>
                <td class="auto-style7" colspan="2"><strong>Login Here</strong></td>
            </tr>
            <tr>
                <td class="auto-style4">User ID</td>
                <td class="auto-style9">
                    <asp:TextBox ID="TextBox1" runat="server" Height="43px" Style="margin-left: 15px" Width="194px" CssClass="animated flash"></asp:TextBox>
                </td>
            </tr>
            <tr>
                <td class="auto-style4">Password</td>
                <td class="auto-style9">
                    <asp:TextBox ID="TextBox2" runat="server" Height="44px" Style="margin-left: 14px" Width="196px" CssClass="animated flash"></asp:TextBox>
                </td>
            </tr>
            <tr>
                <td class="auto-style10" colspan="2">
                    <asp:Button ID="Button2" runat="server" Height="36px" Text="LOGIN" Width="94px" />
                    &nbsp;</td>
            </tr>
        </table>
    </div>
</form>
</body>
</html>

如果你想根据一个属性（比如instances = list(set(instances))）使它们成为唯一的，那么使用字典理解是一种方法：

name

Answer 2

您可以使用Django ORM的.distinct()方法返回不同的模型对象。

Django：如何使模型实例列表不同？

2 个答案: