邮递员：未捕获的 PDOException：SQLSTATE [HY000]：一般错误：1366 不正确的整数值：''

Question

我正在 youtube 上的 TraversyMedia 频道从零开始编写 PHP REST API，其中 Postman 用于检查一切是否正常工作。

代码所在的仓库是here

在 Postman 中，我收到以下错误，但不知道如何解决。

注意：试图获取非对象的属性“标题” /var/www/html/php_rest_myblog/api/post/create.php 在第 21 行

注意：试图获取非对象的属性“body” /var/www/html/php_rest_myblog/api/post/create.php 在第 22 行

注意：试图获取非对象的属性“作者” /var/www/html/php_rest_myblog/api/post/create.php 第 23 行

注意：试图获取非对象的属性“category_id” /var/www/html/php_rest_myblog/api/post/create.php 在第 24 行

致命错误：未捕获的 PDOException：SQLSTATE[HY000]：一般错误： 1366 不正确的整数值：在第 1 行的列 'category_id' 中 /var/www/html/php_rest_myblog/models/Post.php:91 堆栈跟踪：#0 /var/www/html/php_rest_myblog/models/Post.php(91)： PDOStatement->execute() #1 /var/www/html/php_rest_myblog/api/post/create.php(27): Post->create()

2 {main} 在第 91 行的 /var/www/html/php_rest_myblog/models/Post.php 中抛出

post.php 的代码如下：

 <?php 
  class Post {
    // DB stuff
    private $conn;
    private $table = 'posts';

    // Post Properties
    public $id;
    public $category_id;
    public $category_name;
    public $title;
    public $body;
    public $author;
    public $created_at;

    // Constructor with DB
    public function __construct($db) {
      $this->conn = $db;
    }

    // Get Posts
    public function read() {
      // Create query
      $query = 'SELECT c.name as category_name, p.id, p.category_id, p.title, p.body, p.author, p.created_at
                                FROM ' . $this->table . ' p
                                LEFT JOIN
                                  categories c ON p.category_id = c.id
                                ORDER BY
                                  p.created_at DESC';

      // Prepare statement
      $stmt = $this->conn->prepare($query);

      // Execute query
      $stmt->execute();

      return $stmt;
    }

    // Get Single Post
    public function read_single() {
          // Create query
          $query = 'SELECT c.name as category_name, p.id, p.category_id, p.title, p.body, p.author, p.created_at
                                    FROM ' . $this->table . ' p
                                    LEFT JOIN
                                      categories c ON p.category_id = c.id
                                    WHERE
                                      p.id = ?
                                    LIMIT 0,1';

          // Prepare statement
          $stmt = $this->conn->prepare($query);

          // Bind ID
          $stmt->bindParam(1, $this->id);

          // Execute query
          $stmt->execute();

          $row = $stmt->fetch(PDO::FETCH_ASSOC);

          // Set properties
          $this->title = $row['title'];
          $this->body = $row['body'];
          $this->author = $row['author'];
          $this->category_id = $row['category_id'];
          $this->category_name = $row['category_name'];
    }

    // Create Post
    public function create() {
          // Create query
          $query = 'INSERT INTO ' . $this->table . ' SET title = :title, body = :body, author = :author, category_id = :category_id';

          // Prepare statement
          $stmt = $this->conn->prepare($query);

          // Clean data
          $this->title = htmlspecialchars(strip_tags($this->title));
          $this->body = htmlspecialchars(strip_tags($this->body));
          $this->author = htmlspecialchars(strip_tags($this->author));
          $this->category_id = htmlspecialchars(strip_tags($this->category_id));

          // Bind data
          $stmt->bindParam(':title', $this->title);
          $stmt->bindParam(':body', $this->body);
          $stmt->bindParam(':author', $this->author);
          $stmt->bindParam(':category_id', $this->category_id);

          // Execute query
          if($stmt->execute()) {
            return true;
      }

      // Print error if something goes wrong
      printf("Error: %s.\n", $stmt->error);

      return false;
    }

    // Update Post
    public function update() {
          // Create query
          $query = 'UPDATE ' . $this->table . '
                                SET title = :title, body = :body, author = :author, category_id = :category_id
                                WHERE id = :id';

          // Prepare statement
          $stmt = $this->conn->prepare($query);

          // Clean data
          $this->title = htmlspecialchars(strip_tags($this->title));
          $this->body = htmlspecialchars(strip_tags($this->body));
          $this->author = htmlspecialchars(strip_tags($this->author));
          $this->category_id = htmlspecialchars(strip_tags($this->category_id));
          $this->id = htmlspecialchars(strip_tags($this->id));

          // Bind data
          $stmt->bindParam(':title', $this->title);
          $stmt->bindParam(':body', $this->body);
          $stmt->bindParam(':author', $this->author);
          $stmt->bindParam(':category_id', $this->category_id);
          $stmt->bindParam(':id', $this->id);

          // Execute query
          if($stmt->execute()) {
            return true;
          }

          // Print error if something goes wrong
          printf("Error: %s.\n", $stmt->error);

          return false;
    }

    // Delete Post
    public function delete() {
          // Create query
          $query = 'DELETE FROM ' . $this->table . ' WHERE id = :id';

          // Prepare statement
          $stmt = $this->conn->prepare($query);

          // Clean data
          $this->id = htmlspecialchars(strip_tags($this->id));

          // Bind data
          $stmt->bindParam(':id', $this->id);

          // Execute query
          if($stmt->execute()) {
            return true;
          }

          // Print error if something goes wrong
          printf("Error: %s.\n", $stmt->error);

          return false;
    }

  }

create.php 中的代码如下：

    <?php 
  // Headers
  header('Access-Control-Allow-Origin: *');
  header('Content-Type: application/json');
  header('Access-Control-Allow-Methods: POST');
  header('Access-Control-Allow-Headers: Access-Control-Allow-Headers,Content-Type,Access-Control-Allow-Methods, Authorization, X-Requested-With');

  include_once '../../config/Database.php';
  include_once '../../models/Post.php';

  // Instantiate DB & connect
  $database = new Database();
  $db = $database->connect();

  // Instantiate blog post object
  $post = new Post($db);

  // Get raw posted data
  $data = json_decode(file_get_contents("php://input"));

  $post->title = $data->title;
  $post->body = $data->body;
  $post->author = $data->author;
  $post->category_id = $data->category_id;

  // Create post
  if($post->create()) {
    echo json_encode(
      array('message' => 'Post Created')
    );
  } else {
    echo json_encode(
      array('message' => 'Post Not Created')
    );
  }

Answer 1

默认情况下，bindValue() 采用字符串数据类型。如果要使用 INT 值，则需要在调用中指定它

$stmt->bindParam(':category_id', $this->category_id, PDO::PARAM_INT);