Question

在项目中，我正在努力。用户可以在网站的不同部分上传图片。他们可以在他们发布的帖子中上传图片，也可以上传图片以展示他们的宠物（已经有个人资料页面）。所以我想出了一张图像表，如下所示：

TABLE `images` (
 `image_id` INT(11) unsigned NOT NULL AUTO_INCREMENT,
 `user_id` INT(11) unsigned NOT NULL COMMENT 'FOREIGN KEY referencing the user_id of the user, who uploaded the images',
 `image_name` VARCHAR(64) NOT NULL,
 `dog_pet_id` INT(11) NULL COMMENT 'FOREIGN KEY referencing the pet's, who this image belongs to',
 `post_id` INT(11) NULL COMMENT 'FOREIGN KEY referencing the post's, who this image belongs to',
 PRIMARY KEY (`image_id`),
 FOREIGN KEY (`user_id`) REFERENCES users(user_id) ON DELETE CASCADE ON UPDATE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;

因此，如果user_id = 1的用户将拥有dog_pet_id = 2的宠物并且他将为此宠物上传图片，则输出将如下所示：

+------------------------------------------------------------+
| | image_id | user_id | image_name | dog_pet_id | post_id | |
| |        1 |       1 |     bla    |       2    |       0 | |
+------------------------------------------------------------+

如果他要在帖子中上传图片，则dog_pet_id将为0，而post_id将具有帖子的ID等等。
所有这些都按预期工作。 我的问题是显示这些图片！

我尝试解决问题（在MVC结构中（没有CMS或框架））：

我想显示那些user_id等于用户的user_id且dog_pet_id等于pet的id的图像。我无法解决的问题是如何将宠物的dog_pet_id从视图中移植到模型。
通常我使用表单提交或某种链接来做这样的事情，我可以用它来发送id，但这是我第一次不能这样做。

因此，我的想法是通过$ _SESSION超级全局发送它，但是，这总是在我的foreach循环中被覆盖。因此，如果每个用户有多个宠物，则只会显示最后一只宠物的图像。

模型

    /**
     * Display the pet images, which have been uploaded by the user
     */
    public static function displayPetImages()
    {
        $database = DatabaseFactory::getFactory()->getConnection();

        $query = $database->prepare("SELECT * FROM images WHERE user_id = :user_id AND dog_pet_id = :dog_pet_id");

        $query->execute(array(':user_id' => $_SESSION['user_id'], ':dog_pet_id' => $_SESSION['dog_pet_id']));

        return $query->fetchAll();
    }

控制器

    /**
     * Show user's PRIVATE profile
     */
    public function showProfile()
    {
        'pets' => PetModel::getPet(), // get's the pet's information from the database
        'petImages' => PetModel::displayPetImages() // is the function shown above
        ));
    }

视图

foreach ($this->pets as $pet) {
    foreach ($this->petImages as $petImage) { ?>
          $_SESSION['dog_pet_id'] = $pet->dog_pet_id; <----- This is always overwritten!
          <img src="<?= /path/to/the/image/ . $pet->dog_pet_id . '/' . $petImage->image_name . '.jpg' ?>" />
     }
    echo "<form action='" . Config::get('URL') . 'pet/uploadPetImages_action/' . $pet->dog_pet_id . "' method='post' enctype='multipart/form-data'>";
    echo "<input type='file' name='images[]' multiple required />";
    echo "<input type='hidden' name='MAX_FILE_SIZE' value='5242880' />";
    echo "<input type='submit' value='Upload Images' />";
    echo "</form>
    }

我甚至不确定，如果我想要实现的目标是什么，或者甚至可能有更好的方法来做到这一点。
无论如何，我会非常感谢任何帮助！

的更新

模型

    /**
     * Display the pet images, which have been uploaded by the user
     */
    public static function displayPetImages($dog_pet_id)
    {
        $database = DatabaseFactory::getFactory()->getConnection();

        $query = $database->prepare("SELECT image_name FROM images WHERE user_id = :user_id AND dog_pet_id = :dog_pet_id");

        $query->execute(array(':user_id' => Session::get('user_id'), ':dog_pet_id' => $dog_pet_id));

        return $query->fetchAll();
    }

控制器

        /**
         * Show user's PRIVATE profile
         */
        public function showProfile()
        {
            'pets' => PetModel::getPet(), // get's the pet's information from the database
            'petImages' => PetModel::displayPetImages() // is the function shown above
            ));
        }

视图

foreach ($this->pets as $pet) { ?>          
        <?php foreach ($this->petImages as $petImage) { ?>
            <img src="<?= Config::get('URL') . Config::get('PATH_IMAGES_PUBLIC') . Session::get('user_id') . '/' . 'pets/' . $pet->dog_pet_id . '/' . displayPetImages($pet->dog_pet_id) . '.jpg' ?>" />;
        }
     }

输出

警告：缺少PetModel :: displayPetImages（）的参数1 注意：未定义的变量：dog_pet_id

Answer 1

/**
 * Display the pet images, which have been uploaded by the user
 */
public static function displayPetImages($dog_pet_id)
{
    $database = DatabaseFactory::getFactory()->getConnection();

    $query = $database->prepare("SELECT * FROM images WHERE user_id = :user_id AND dog_pet_id = :dog_pet_id");

    $query->execute(array(':user_id' => $_SESSION['user_id'], ':dog_pet_id' => $dog_pet_id));

// return only image name

}

将pet id传递给函数并在查询中使用它。

也改变功能的输出。它应该只返回图像名称。

并在视图中直接调用此函数

foreach ($this->pets as $pet) {
foreach ($this->petImages as $petImage) { ?>
      //$_SESSION['dog_pet_id'] = $pet->dog_pet_id; <----- This is always overwritten!
      <img src="<?= /path/to/the/image/ . $pet->dog_pet_id . '/' . displayPetImages($pet->dog_pet_id)  ?>" />
 }

}

Answer 2

由于您指定的原因，该会话事项无法正常工作：当您的视图运行该循环时，它会覆盖该变量。

我为每只宠物提供单独的HTML表单，以及单独的上传按钮;

<?php foreach ($this->pets as $pet) { ?>
    <form action="/wherever" method="POST">
        <input type="hidden" name="pet_id" value="<?= $pet->pet_id ?>" />
        <?php foreach ($this->petImages as $petImage) { ?>
            <img src="<?= /path/to/the/image/.$pet->dog_pet_id.'/'.$petImage->image_name.'.jpg' ?>" />
        <?php } ?>
        <input type="submit" value="Save" />
    </form>
<?php } ?>

然后，根据他们点击的保存按钮，它将有一个不同的pet_id值供您比较。

Answer 3

在提交所有宠物ID的数组时，它看起来应该对你有用。

foreach( $this->pets as $pet ):
    echo "<form action='" . Config::get('URL') . 'pet/uploadPetImages_action/' . $pet->dog_pet_id . "' method='post' enctype='multipart/form-data'>";
    ?>
    <?php foreach( $this->petImages as $petImage ): ?>
        <input type="hidden" name="pets[<?php echo $pet->dog_pet_id; ?>]" value="pets[<?php echo $pet->dog_pet_id; ?>]" />
        <img src="<?php echo '/path/to/the/image/' . $pet->dog_pet_id . '/' . $petImage->image_name . '.jpg'; ?>" />
    <?php endforeach; ?>
    echo "<input type='file' name='images[]' multiple required />";
    echo "<input type='hidden' name='MAX_FILE_SIZE' value='5242880' />";
    echo "<input type='submit' value='Upload Images' />";
    echo "</form>";
<?php endforeach; ?>

在foreach循环中设置会话值

3 个答案: