从更新操作的记录接收数据时出现问题（尝试访问 bool 类型值的数组偏移量）

Question

我无法让我的 form_update_manga.php 页面从 form_read_manga.php 页面发送的记录中接收值。

None 字段 return 记录中的任何值，因此无法更新表单。顺便说一句，没有办法在这种形式下做任何事情。我找不到合乎逻辑的解决方案。

form_update_manga.php页面出现的错误如下图所示：

Image here

大多数表单字段出错：尝试访问 bool 类型值的数组偏移量

Manga.php

<?php
    
    require_once '../model/BD.php';
    
    class Manga extends BD {
        
        private $id_manga, $title, $publisher, $volumes, $discount, $value;
        
        public function getId() { return $this->id_manga; }
        public function getTitle() { return $this->title; }
        public function getPublisher() { return $this->publisher; }
        public function getVolumes() { return $this->volumes; }
        public function getDiscount() { return $this->discount; }
        public function getValue() { return $this->value; }
        
        public function setId($id_manga) { $this->id_manga = $id_manga; }
        public function setTitle($title) { $this->title = $title; }
        public function setPublisher($publisher) { $this->publisher = $publisher; }
        public function setVolumes($volumes) { $this->volumes = $volumes; }
        public function setDiscount($discount) { $this->discount = $discount; }
        public function setValue($value) { $this->value = $value; }
    }
?>

MangaDAO.php


    protected $table = 'manga'; 
    
    public function readManga() {
        try {
            $sql = "SELECT * FROM $this->table WHERE id_manga = :id_manga";
            $stm = BD::getInstance()->prepare($sql);
            $stm->bindValue(':id_manga', $this->getId());
            $stm->execute();
            return $stm->fetch(PDO::FETCH_ASSOC);
        } catch (PDOException $e) {
            echo "Error PDO" . $e->getMessage();
            die();
        } catch (Exception $e) {
            echo "Error" . $e->getMessage();
            die();
        } 
    }
    
    public function updateManga() {
        try {
            $sql = "UPDATE $this->table SET title = :title, publisher = :publisher, 
            volumes = :volumes, discount = :discount, value = :value WHERE id_manga = :id_manga";
            $stm = BD::getInstance()->prepare($sql);
            $stm->bindValue(':id_manga', $this->getId());
            $stm->bindValue(':title', $this->getTitle());
            $stm->bindValue(':publisher', $this->getPublisher());
            $stm->bindValue(':volumes', $this->getVolumes());
            $stm->bindValue(':discount', $this->getDiscount());
            $stm->bindValue(':value', $this->getValue());
            return $stm->execute(); 
        } catch (PDOException $e) {
            echo "Error PDO" . $e->getMessage();
            die();
        } catch (Exception $e) {
            echo "Error ". $e->getMessage();
            die();
        } 
}

form_read_manga.php


    <div class="container" style="margin-top: 40px;">
        <h4 class="text-center">Manga list</h4>
        <br>
        <table class="table table-hover">
            <thead>
                <tr>
                    <th>ID</th>
                    <th>Title</th>
                    <th>Publisher</th>
                    <th>Volumes</th>
                    <th>Discount</th>
                    <th>Value collection</th>
                    <th>Register date</th>
                    <th>Actions</th>
                </tr>
            </thead>
                <tbody>
                    <?php
                        require_once "../model/MangaDAO.php";
                        $manga = new MangaDAO();
                        foreach ($manga->readAllMangas() as $value){
                            echo '<tr>';
                                echo '<td>'.$value['id_manga'].'</td>';
                                echo '<td>'.$value['title'].'</td>';
                                echo '<td>'.$value['publisher'].'</td>';
                                echo '<td>'.$value['volumes'].'</td>';
                                echo '<td>'.$value['discount'].'</td>';
                                echo '<td>R$'.$value['value'].'</td>';
                                echo '<td>'.date('d/m/Y H:i:s', strtotime($value['register_date'])).'</td>';
                                echo '<td>';
                                    echo '<a class="btn btn-info" href="/mangas/view/form_update_manga.php?id_manga='.$value['id_manga'].'"role="button" ><i class="fa fa-edit"></i>&nbsp;Update</a>';
                                    echo "&nbsp;";
                                    echo '<a class="btn btn-danger" href="/mangas/controller/delete_manga.php?id_manga='.$value['id_manga'].'"role="button"><i class="fa fa-trash"></i>&nbsp;Delete</a>';
                                echo '</td>';                  
                            echo '</tr>'; 
                        }
                    ?>
                </tbody>
        </table>
    </div>

form_update_manga.php


    <?php
    
        require_once "../model/MangaDAO.php";
    
        $mangaDAO = new MangaDAO();
        
        if (!isset($_GET['id_manga'])) {
            echo '<p><a href="../view/form_read_manga.php"><button>Redo operation</button></a></p>';
            die();
        } else {
            $data = $mangaDAO->readManga($_GET['id_manga']);
        }
            
    ?>
        <div class="container" id="t_container" style="margin-top: 20px;">
            <h4 class="text-center">Update collection</h4>
            <small class="form-text text-muted text-center">All fields are mandatory</small>
            <br>
            <form method="POST" action="/mangas/controller/update_manga.php">
                <div class="form-group">
                  <label>ID:</label>
                  <input type="number" class="form-control" name="id_manga" required value="<?php echo $data['id_manga'] ?>" disabled>
                </div>
                <div class="form-group">
                  <label>Title:</label>
                  <input type="text" class="form-control" name="title" required maxlength="50" value="<?php echo $data['title'] ?>">
                </div>
                <div class="form-group">
                  <label>Publisher:</label>
                  <select class="custom-select" name="publisher" required value="<?php echo $data['publisher'] ?>">
                        <option selected value="">Choose the publisher</option>
                        <option value="Astral Comics" title="Astral Comics">Astral Comics</option>
                        <option value="Clamp" title="Clamp">Clamp</option>
                        <option value="Conrad" title="Conrad">Conrad</option>
                        <option value="Darkside Books" title="Darkside Books">Darkside Books</option>
                        <option value="Devir" title="Devir">Devir</option>
                        <option value="JBC" title="JBC">JBC</option>
                        <option value="NewPop" title="NewPop">NewPop</option>
                        <option value="Nova Sampa" title="Nova Sampa">Nova Sampa</option>
                        <option value="Panini" title="Panini">Panini</option>
                        <option value="Pipoca & Nanquim" title="Pipoca & Nanquim">Pipoca & Nanquim</option>
                        <option value="Veneta" title="Veneta">Veneta</option>
                        <option value="Other" title="Other">Other</option>
                    </select>
                </div>
                <div class="form-group">
                  <label>Volumes amount:</label>
                  <input type="text" class="form-control" name="volumes" required onkeypress="$(this).mask('000', {reverse: true});" value="<?php echo $data['volumes'] ?>">
                </div>
                <div class="form-group">
                  <label>Discount:</label>
                  <input type="text" class="form-control" name="discount" required onkeypress="$(this).mask('000.00', {reverse: true});" value="<?php echo $data['discount'] ?>">
                </div>
                <div class="form-group">
                  <label>Value collection:</label>
                  <input type="text" class="form-control" name="value" required value="<?php echo $data['value'] ?>" onkeypress="$(this).mask('000.00', {reverse: true});">
                </div>
                <button type="submit" name="btn_update" class="btn btn-info btn-lg btn-block"><i class="fa fa-edit"></i>&nbsp;Update</button>
            </form>
        </div>

Answer 1

用 MangaDAO.php

中的代码替换您的代码

protected $table = 'manga'; 

public function readManga($mangaId) {
    try {
        $sql = "SELECT * FROM $this->table WHERE id_manga = :id_manga";
        $stm = BD::getInstance()->prepare($sql);
        $stm->bindValue(':id_manga', $mangaId);
        $stm->execute();
        return $stm->fetch(PDO::FETCH_ASSOC);
    } catch (PDOException $e) {
        echo "Error PDO" . $e->getMessage();
        die();
    } catch (Exception $e) {
        echo "Error" . $e->getMessage();
        die();
    } 
}

Answer 2

您必须将选定的属性设置为特定值，请参考以下代码。

<div class="form-group">
    <label>Publisher:</label>
    <select class="custom-select" name="publisher" required value="<?php echo $data['publisher'] ?>">
        <option value="" <?php if($data['publisher']==''){echo 'selected';} ?>>Choose the publisher</option>
        <option value="Astral Comics" title="Astral Comics" <?php if($data['publisher']=='Astral Comics'){echo 'selected';} ?>>Astral Comics</option>
        <option value="Clamp" title="Clamp" <?php if($data['publisher']=='Clamp'){echo 'selected';} ?>>Clamp</option>
        <option value="Conrad" title="Conrad" <?php if($data['publisher']=='Conrad'){echo 'selected';} ?>>Conrad</option>
        <option value="Darkside Books" title="Darkside Books" <?php if($data['publisher']=='Darkside Books'){echo 'selected';} ?>>Darkside Books</option>
        <option value="Devir" title="Devir" <?php if($data['publisher']=='Devir'){echo 'selected';} ?>>Devir</option>
        <option value="JBC" title="JBC" <?php if($data['publisher']=='JBC'){echo 'selected';} ?>>JBC</option>
        <option value="NewPop" title="NewPop" <?php if($data['publisher']=='NewPop'){echo 'selected';} ?>>NewPop</option>
        <option value="Nova Sampa" title="Nova Sampa" <?php if($data['publisher']=='Nova Sampa'){echo 'selected';} ?>>Nova Sampa</option>
        <option value="Panini" title="Panini" <?php if($data['publisher']=='Panini'){echo 'selected';} ?>>Panini</option>
        <option value="Pipoca & Nanquim" title="Pipoca & Nanquim" <?php if($data['publisher']=='Pipoca & Nanquim'){echo 'selected';} ?>>Pipoca & Nanquim</option>
        <option value="Veneta" title="Veneta" <?php if($data['publisher']=='Veneta'){echo 'selected';} ?>>Veneta</option>
        <option value="Other" title="Other" <?php if($data['publisher']=='Other'){echo 'selected';} ?>>Other</option>
    </select>
</div>

从更新操作的记录接收数据时出现问题（尝试访问 bool 类型值的数组偏移量）

Problems receiving data from a record for update operation (Trying to access array offset on value of type bool)

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