Codeigniter 分頁不顯示查詢結果的第一行

Question

正如您在下面看到的，我正在查詢數據庫以獲取問題列表。

我的 model 返回問題計數（ count_questions() ）以及問題本身（ get_questions($args) ），然后分頁。

    $limit  = '10';
    $count  = $this->forum_model->count_questions();
    $offset    = $this->uri->segment(3, 0);

    $this->load->library('pagination');

    $config['base_url']         = base_url() . 'forum/all/';
    $config['total_rows']       = $count;
    $config['per_page']         = $limit;
    $config['full_tag_open']    = '<div class="pagination">';
    $config['full_tag_close']   = '</div>';
    $config['uri_segment']          = 3;

    $this->pagination->initialize($config);

    $data['q']          = $this->forum_model->get_questions(NULL, $limit, $offset);

    $data['pag_links']  = $this->pagination->create_links();

我看到的奇怪行為是count_questions()返回“25”（這是正確的）。

但是分頁 output 顯示 24 個問題，跳過了我數據庫中的第一行/問題。

起初我以為這可能是因為偏移量錯誤，但在第一頁它被設置為 0。

如果我不使用分頁，我的 controller 會將所有 25 個問題輸出到我的視圖中。 所以似乎我正在對分頁限制/偏移量做一些事情，這可能是罪魁禍首。

任何想法這里可能有什么問題？

感謝您的幫助。

Model (get_questions)

function get_questions($forum_qa_id = NULL, $limit = NULL, $offset = NULL)
{
    ($forum_qa_id === NULL) ? ($forum_qa_id = "'%'") : ($forum_qa_id = $forum_qa_id);
    ($limit       === NULL) ? ($limit = 1) : ($limit = $limit);
    ($offset      === NULL) ? ($offset = 0) : ($offset = $offset);

    $query = $this->db->query("
    SELECT forum_qa.*,
           user_profiles.*,
           c.*,
           n.pid,
           v.*,
           Ifnull(n.ans_count, 0) AS ans_count
    FROM   forum_qa
           JOIN user_profiles
             ON user_id = forum_qa_author_id
           LEFT JOIN (SELECT *
                      FROM   votes) AS v
             ON forum_qa_id = v.forum_qa_id_fk
           LEFT JOIN (SELECT forum_cm_id,
                             forum_cm_author_id,
                             forum_qa_id_fk,
                             forum_cm_text,
                             forum_cm_timestamp,
                             forum_cm_flag,
                             first_name  AS forum_cm_first_name,
                             last_name   AS forum_cm_last_name,
                             facebook_id AS forum_cm_fb_id,
                             picture     AS forum_cm_picture,
                             moderator   AS forum_cm_moderator
                      FROM   forum_cm
                             JOIN user_profiles
                               ON user_id = forum_cm_author_id) AS c
             ON forum_qa_id = c.forum_qa_id_fk
           LEFT JOIN (SELECT forum_qa_parent_id AS pid,
                             COUNT(*)           AS ans_count
                      FROM   forum_qa
                      WHERE  forum_qa_parent_id IS NOT NULL
                      GROUP  BY forum_qa_parent_id) AS n
             ON forum_qa_id = n.pid
    WHERE  forum_qa_id LIKE $forum_qa_id
           AND forum_qa_parent_id IS NULL
    ORDER  BY forum_qa_timestamp DESC
    LIMIT  $limit
    OFFSET $offset;     
    ");

Model (count_questions)

function count_questions()
{
    $query = $this->db->query("
    SELECT  *
    FROM    forum_qa
    WHERE   forum_qa_type = 1;
    ");

    return $query->num_rows;
}

Answer 1

return $query->num_rows; 應該return $query->num_rows(); .

另外，嘗試將LIMIT $limit OFFSET $offset更改為LIMIT $offset,$limit 。

Answer 2

問題是，當默認頁面執行時，它從第一行而不是零開始記錄，這就是第一行丟失的原因。 我應用了以下代碼來解決這個問題

$page = ($this->uri->segment(3))? $this->uri->segment(3): 0;

請根據您的要求編輯段 URL

Answer 3

$this->uri->segment(3, 0);

默認情況下，如果段不存在，function 返回 FALSE（布爾值）。 所以我覺得不對？？

($offset      === NULL) ? ($offset = 0) : ($offset = $offset);