3
我是Drupal新用戶& PHP。 我有一個類似的問題this unanswered question，我自己找不到一個。Drupal 7 - 如何使用AJAX更改多個下拉菜單？
我需要3依賴下拉菜單，其中用戶需要選擇：
- 一號通講師。
- 第二 - 他的相關課程之一。
- 第3個 - 課程章節。
（該數據從數據庫中提取）
作爲個人，他們工作的罰款（當我選擇講師的課程列表中得到更新，當我選擇一門課程的章節得到更新），但是當我選擇講師，章節列表將不會更新以反映課程下拉的變化。
這是我寫到目前爲止代碼：
function test_form($form, &$form_state)
{
$form = array();
$lect_options = drupal_map_assoc(get_lecturer_dropdown_options());
$selected_lect = isset($form_state['values']['lect']) ? $form_state['values']['lect'] : key($lect_options);
$form['lect'] = array(
'#type' => 'select',
'#title' => t('Lecturer Name:'),
'#default_value' => $selected_lect,
'#options' => $lect_options,
'#ajax' => array(
'callback' => 'ajax_dependent_crs_dropdown_callback',
'wrapper' => 'dropdown-course-replace',
),
);
$course_options = drupal_map_assoc(_ajax_get_crse_dropdown_options($selected_lect));
$selected_course = isset($form_state['values']['course']) ? $form_state['values']['course'] : key($course_options);
$form['course'] = array(
'#type' => 'select',
'#title' => t('Courses:'),
'#prefix' => '<div id="dropdown-course-replace">',
'#suffix' => '</div>',
'#options' => $course_options,
'#default_value' => $selected_course,
'#ajax' => array(
'callback' => 'ajax_dependent_chap_dropdown_callback',
'event' => 'change',
'wrapper' => 'dropdown-chap-replace',
),
);
$form['chapter'] = array(
'#type' => 'select',
'#title' => t('Chapter:'),
'#prefix' => '<div id="dropdown-chap-replace">',
'#suffix' => '</div>',
'#options' => _ajax_get_chap_dropdown_options($selected_course),
);
return $form;
}
function ajax_dependent_crs_dropdown_callback($form, $form_state) {
return $form['course'];
}
function ajax_dependent_chap_dropdown_callback($form, $form_state) {
return $form['chapter'];
}
function get_lecturer_dropdown_options()
{
$lect_array = array();
$lect_result = db_query("SELECT Vod_Lectuerers.LecturerID, Vod_Lectuerers.LecFirsName, Vod_Lectuerers.LecLastName FROM Vod_Lectuerers ORDER BY Vod_Lectuerers.LecturerID");
foreach ($lect_result as $lect_key=>$lect_row)//Get each lecturer data from the query result
{
$lect_array[] = $lect_row->lecturerid . '# ' . $lect_row->lecfirsname . ' ' . $lect_row->leclastname;
}
return $lect_array;
}
function _ajax_get_crse_dropdown_options($key)
{
if ($key!='')
{
$course_data = array();
$lect_id = substr($key, 0, 4);//cut the ID for the key recived by function
$crs_result = db_query("SELECT Vod_Course.CourseID, Vod_Course.CourseName FROM Vod_Course WHERE Vod_Course.LecturerID='$lect_id' ORDER BY Vod_Course.CourseID", array($lect_id));
foreach ($crs_result as $crs_key=>$crs_row)//Get each course data from the query result
{
$course_data[] = $crs_row->courseid . '# ' . $crs_row->coursename;
}
return $course_data;
}
else
{
return array();
}
}
function _ajax_get_chap_dropdown_options($key)
{
if ($key!='')
{
$chapter_data = array();
$course_id = substr($key, 0, 1);//cut the ID
$cptr_result = db_query("SELECT Vod_Chapters.ChapterID, Vod_Chapters.ChapterDescription FROM Vod_Chapters WHERE Vod_Chapters.CourseID='$course_id' ORDER BY Vod_Chapters.ChapterID", array($course_id));
foreach ($cptr_result as $cptr_key=>$cptr_row)//Get each chapter data from the query result
{
$chapter_data[] = $cptr_row->chapterid . '# ' . $cptr_row->chapterdescription;
}
return $chapter_data;
}
else
{
return array();
}
}
任何幫助將非常感激。