[英]jquery ui's“selectable” - need to call codeigniter model function
(原始問題)我使用jquery ui的可選腳本來控制我的webapp中的特定活動關鍵字。 在此處查看: www.rickymason.net/letschat/main/home以供參考
我對javascript的經驗很少,我想弄清楚如何在我的主模型中啟動一個函數。
根據答案更新功能:
我已更新我的代碼以支持新的JSON / AJAX格式。 這需要我創建一個活動/非活動會話過濾器,以便用戶可以正常添加過濾器,並始終使用AJAX來更新線程列表。 這對我來說更有意義。
這是我目前的代碼,但仍然無效。 我試圖在用戶單擊可選類別(通過Jquery UI)時這樣做,與選擇關聯的divID通過AJAX傳遞並返回更新div id =“board”的threadlist數組。
這是我當前的Controller設置:
public function home($page = 'home')
{
$data['user_id'] = $this->tank_auth->get_user_id();
$data['username'] = $this->tank_auth->get_username();
$data['threads'] = $this->thread_model->session_load();
$data['title'] = ucfirst($page); // Capitalize the first letter
$data['page'] = $page;
$this->load->view('templates/head', $data);
$this->load->view('templates/nav', $data);
$this->load->view('main/newthread', $data);
$this->load->view('main/addfilter', $data);
$this->load->view('main/checkbox', $data);
$this->load->view('main/displayfilter',$data);
$this->load->view('main/board', $data);
$this->load->view('templates/footer');
}
public function updatefilters($filters)
{
$filterarray = split("|", $filters);
$this->thread_model->create_session_filter($filterarray);
$threadarray = $this->thread_model->get_threads();
$data['json'] = '{"content":' + $threadarray + '}';
$this->load->view('json_view', $data); // See step 4!!!
}
這是我目前的型號代碼:
public function get_threads()
{
$filter = $this->session->userdata('filter');
$num_tags = count($filter);
if ($num_tags > 0 && $num_tags <= 8) {
$sql_select = "SELECT DISTINCT t.* ";
$sql_from = " FROM ";
$sql_where = " WHERE ";
$sql_joins = "";
$sql_order = "ORDER BY t.timestamp DESC";
for ($i=0;$i<$num_tags;++$i) {
if ($i==0) {
$sql_from .= " filter AS f ";
$sql_where .= " f.tag LIKE '%" . $filter[0] . "%'";
$sql_joins .= " INNER JOIN filter_thread AS ft ON ft.filter_id = f.filter_id
INNER JOIN thread AS t ON ft.thread_id = t.thread_id";
}
else {
$sql_where .= " OR f.tag LIKE '%" . $filter[$i] . "%'";
}
}
} else {
break;
}
$sql = $sql_select . $sql_from . $sql_joins . $sql_where . $sql_order;
$query = $this->db->query($sql);
$thread = $query->result_array();
return json_encode($thread); //I am aware this is not correct
}
public function create_session_filter($filterstring)
{
$filterarray[] = $filterstring;
$filter['filter'] = $filterarray;
if ($this->session->userdata('filter') == TRUE) {
$sessionfilter = $this->session->userdata('filter');
$new = array_merge($sessionfilter, $filter['filter']);
$this->session->unset_userdata('filter');
$filter['filter'] = $new;
$this->session->set_userdata($filter);
} else {
if (!$filterstring) {} else {
$this->session->set_userdata($filter);
}
}
}
public function create_session_inactive_filter($filterstring)
{
$filterarray[] = $filterstring;
$filter['inactivefilter'] = $filterarray;
if ($this->session->userdata('inactivefilter') == TRUE) {
$sessionfilter = $this->session->userdata('inactivefilter');
$new = array_merge($sessionfilter, $filter['inactivefilter']);
$this->session->unset_userdata('inactivefilter');
$filter['inactivefilter'] = $new;
$this->session->set_userdata($filter);
} else {
if (!$filterstring) {} else {
$this->session->set_userdata($filter);
}
}
}
這是我當前的查看代碼:
應用/主/ json_view.php
<?php
header("Content-Type: application/json");
echo $json;
?>
aplication /主/ bdisplayfilter.php
<script>
$(function() {
$( "#selectable" ).selectable({
selected: updateFilters,
unselected: updateFilters
});
function updateFilters(ev, ui){
alert ("hello");
// get the selected filters
var $selected = $('#selectable').children('.ui-selected');
// create a string that has each filter separated by a pipe ("|")
var filters = $selected.map(function(){return this.id;}).get().join("|");
$.ajax({
url: '/main/updateFilters', //see step 2
data: { filters: filters },
success: function(data){
// data is whatever json you decide to return from the server.
// An easy way to do things is have data look like this:
// { content: "<div>All my new threads that I want to show up</div>" }
// then, you can replace some element on the page with the new content
// For example, say your container has an id of threadContainer:
$('#select').replaceWith(data.content);
}
}); }
});
</script>
<ol id="selectable">
<li class="ui-state-default" id="everything">Everything!</li>
<li class="ui-state-default" id="entertainment">Entertainment</li>
<li class="ui-state-default" id="sci/tech">Sci/Tech</li>
<li class="ui-state-default" id="news">News</li>
<?php
if ($this->session->userdata('inactivefilter') == true) {
$inactivefilter = $this->session->userdata('inactivefilter');
foreach ($inactivefilter as $new)
{
echo "<li class='ui-state-default' id='custom'>$new</li>";
}
}
?>
</ol>
<?php
if ($this->session->userdata('inactivefilter') == true) {
echo "<form action='".base_url()."main/clear_filter'><input type='submit' value=clear></form>";
} ?>
編輯:我已經更新了ajax調用的url和數據部分,並添加了一個額外的步驟來啟用查詢字符串參數。
1)進行AJAX調用
您將需要對選定和未選擇的呼叫進行相同的呼叫,因為您可以擁有多個過濾器,並且您需要相應地更新這兩個事件。 所以,我將定義一個兩個事件都可以調用的公共函數。
$(function() {
$( "#selectable" ).selectable({
selected: updateFilters,
unselected: updateFilters
});
function updatefilters(ev, ui){
// get the selected filters
var $selected = $('#selectable').children('.ui-selected');
// create a string that has each filter separated by a pipe ("|")
var filters = $selected.map(function(){return this.id;}).get().join("|");
$.ajax({
url: '/index.php',
data: { c: main, m: updateFilters, filters: filters },
success: function(data){
// data is whatever json you decide to return from the server.
// An easy way to do things is have data look like this:
// { content: "<div>All my new threads that I want to show up</div>" }
// then, you can replace some element on the page with the new content
// For example, say your container has an id of threadContainer:
$('#threadContainer').replaceWith(data.content);
}
});
}
});
2)在application / config.php中啟用查詢字符串參數
本文底部的“啟用查詢字符串”一節介紹了如何執行此操作: http : //codeigniter.com/user_guide/general/urls.html
3)創建將接收過濾器的操作
請注意,我正在使用一個名為Page的控制器(它將存在於/application/controllers/page.php中)。 此操作(updateFilters)可以存在於您想要的任何控制器中。
class Page extends CI_Controller {
function __construct()
{
parent::__construct();
}
function index()
{
}
function updateFilters($filters)
{
$filterarray = split("|", $filters);
create_session_filter($filterarray);
$articlesHTML = getThreadList($filterarray); // See step 4!!!
$data['json'] = '{"content":' + $articlesHTML + '}';
$this->load->view('json_view', $data); // See step 5!!!
}
/* I've updated this slightly to accept an array */
public function create_session_filter($filterarray)
{
$filter['filter'] = $filterarray;
//... the rest of your stuff you already had
}
}
4)實現getThreadList方法
如果你已經為此設置了一些東西,我認為你沒有提到過。 這將基本上采用一組過濾器,然后基於此呈現線程列表。
5)創建json_view(如果還沒有)
這將設置內容類型,以便瀏覽器知道內容是json。
在/application/views/json_view.php中:
<?php
header("Content-Type: application/json");
echo $json;
?>
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