Question

首先我有：

 public function getAllUserTasks($user_id) {
        $stmt = $this->conn->prepare("SELECT t.* FROM tasks t, user_tasks ut WHERE t.id = ut.task_id AND ut.user_id = ?");
        $stmt->bind_param("i", $user_id);
        $stmt->execute();
        $stmt->bind_result();
        $tasks = $stmt->get_result();
        $stmt->close();
        return $tasks;
    }

并且此函数与get_result()有问题所以现在我用BIND和FETCH编写函数get_result：

public function getAllUserTasks($user_id) {
        $stmt = $this->conn->prepare("SELECT t.* FROM tasks t, user_tasks ut WHERE t.id = ut.task_id AND ut.user_id = ?");
        $stmt->bind_param("i", $user_id);
        $stmt->execute();
        $tasks = array();
            $stmt->bind_result($id, $task, $status, $created_at);

            $stmt->fetch();
            $tasks["id"] = $id;
            $tasks["task"] = $task;
            $tasks["status"] = $status;
            $tasks["created_at"] = $created_at;
            $stmt->close();
            return $tasks;
    }

但是在其他文件index.php上我现在得到：Fatal error: Call to a member function fetch_assoc() on a non-object in /home/agroagro/public_html/agroMobile/v1/index.php on line 155 

所以有一个代码：

$app->get('/tasks', 'authenticate', function() {
            global $user_id;
            $response = array();
            $db = new DbHandler();

            // fetching all user tasks
            $result = $db->getAllUserTasks($user_id);

            $response["error"] = false;
            $response["tasks"] = array();

            // looping through result and preparing tasks array
            while ($task = $result->fetch_assoc()) {    <--HERE IS LINE 155 and ERROR
                $tmp = array();
                $tmp["id"] = $task["id"];
                $tmp["task"] = $task["task"];
                $tmp["status"] = $task["status"];
                $tmp["createdAt"] = $task["created_at"];
                array_push($response["tasks"], $tmp);
            }

            echoRespnse(200, $response);
        });

我试着整天解决这个问题并且不工作......有人能告诉我这里到底出现了什么问题吗？

此代码有什么问题？

Answer 1

像这样（未经测试的代码）：

public function getAllUserTasks($user_id) {
    $stmt = $this->conn->prepare("SELECT t.* FROM tasks t, user_tasks ut WHERE t.id = ut.task_id AND ut.user_id = ?");
    $stmt->execute(array($user_id));

    return $stmt->fetchAll(PDO::FETCH_ASSOC);
}

$app->get('/tasks', 'authenticate', function() {
    global $user_id;
    $response = array();
    $db = new DbHandler();

    $response["error"] = false;
    $response["tasks"] = $db->getAllUserTasks($user_id);

        echoRespnse(200, $response);
    });

Php - 调用成员函数fetch_assoc（）

1 个答案: