Question

我正在尝试保存Authors模型，但它两次保存到数据库中。 views.py

 <!DOCTYPE html>
    <html lang="en">
    <head>
    <meta charset="UTF-8">
    <title>PHP Live MySQL Database Search</title>
    <style type="text/css">
        body{
            font-family: Arail, sans-serif;
        }
        .search-box{
            width: 300px;
            position: relative;
            display: inline-block;
            font-size: 14px;
        }
        .search-box input[type="text"]{
            height: 32px;
            padding: 5px 10px;
            border: 1px solid #CCCCCC;
            font-size: 14px;
        }
        .result{
            position: absolute;        
            z-index: 999;
            top: 100%;
            left: 0;
        }
        .search-box input[type="text"], .result{
            width: 100%;
            box-sizing: border-box;
        }
        .result p{
            margin: 0;
            padding: 7px 10px;
            border: 1px solid #CCCCCC;
            border-top: none;
            cursor: pointer;
        }
        .result p:hover{
            background: #f2f2f2;
        }
    </style>
    <script src="https://code.jquery.com/jquery-1.12.4.min.js"></script>
    <script type="text/javascript">
    var fields = 1;
    function add_fields() {
        fields++;
        var objTo = document.querySelector('.search-box')
        var divtest = document.createElement("div");
        divtest.innerHTML = '<input type="text" autocomplete="off" placeholder="Étel keresése"/><div class="result"></div>';

        objTo.appendChild(divtest)
    }
    $(document).ready(function(){
        $('.search-box input[type="text"]').on("keyup input", function(){
            var inputVal = $(this).val();
            var resultDropdown = $(this).siblings(".result");
            if(inputVal.length){
                $.get("backend-search.php", {term: inputVal}).done(function(data){
                    resultDropdown.html(data);
                });
            } else{
                resultDropdown.empty();
            }
        });

        $(document).on("click", ".result p", function(){
            $(this).parents(".search-box").find('input[type="text"]').val($(this).text());
            $(this).parent(".result").empty();
        });
    });
    </script>
    </head>
    <body>
        <form action="order-food.php" action="post">
            <input type="button" onclick="add_fields();" value="Hozzáad">
            <br>
            <div class="search-box">
                <input type="text" autocomplete="off" placeholder="Étel keresése" />
                <div class="result"></div>
            </div>
            <br>
            <input type="submit" value="Rendelés felvétele">
        </form>
    </body>
    </html>

我认为问题出在m_missing_authors吧？

models.py

<?php
$link = mysqli_connect("localhost", "root", "", "etterem");

if($link === false){
    die("Nem sikerült a csatlakozás: " . mysqli_connect_error());
}

if(isset($_REQUEST["term"])){
    $sql = "SELECT * FROM foods WHERE food_name LIKE ?";

    if($stmt = mysqli_prepare($link, $sql)){
        mysqli_stmt_bind_param($stmt, "s", $param_term);

        $param_term = $_REQUEST["term"] . '%';

        if(mysqli_stmt_execute($stmt)){
            $result = mysqli_stmt_get_result($stmt);

            if(mysqli_num_rows($result) > 0){
                while($row = mysqli_fetch_array($result, MYSQLI_ASSOC)){
                    echo "<p>" . $row["food_name"] . "</p>";
                }
            } else{
                echo "<p>Nincs találat</p>";
            }
        } else{
            echo "Nem sikerült a lehívás: $sql. " . mysqli_error($link);
        }
    }

    mysqli_stmt_close($stmt);
}

mysqli_close($link);
?>

数据库是sqllite3 Django版本是2.2.1

Answer 1

bulk_create方法在执行查询后自动保存结果。

将代码更改为此：

if missing_authors:
    Authors.objects.bulk_create(missing_authors)


''' remove these lines
    for m in missing_authors:
        m.save()

#not sure what this line is doing exactly, but it might be causing your problem
book.authors.add(*existing_authors, *missing_authors)
'''

更新

如果您可以为author_name列设置unique=True，请尝试以下操作：

class Authors(models.Model):
    author_name = models.CharField(max_length=200, unique=True)

Authors.objects.bulk_create(missing_authors, ignore_conflicts=True)
for m in missing_authors:
    m.save()

book.authors.add(*existing_authors, *missing_authors)

Django模型保存两次

1 个答案:

更新