我正在嘗試構建一個簡單的社交媒體網站,其中人們可以發佈帖子並對帖子發表評論(有點像Facebook)。爲了獲取帖子和評論,我創建了兩個簡單的PHP腳本,以json格式獲得結果。然後我在jquery中創建了兩個函數,分別爲getPosts()
和getComments()
以ajax的結果。成功時,這些函數clone()
我爲已返回的每個帖子/評論對象創建的html框架。JQuery函數沒有在文檔加載時執行
這裏是我的HTML框架: -
<div class="KK-posts_feed">
<div class="KK-post_frame" style="display:none;"> //This is the div that I clone() for postings
<div class="KK-post_info_header">
<a class="KK-post_username"></a>
</div>
</div>
<div class="KK-post_text"></div>
<div class="KK-post_comment_thread" data-PID="">
<div class="KK-post_comment_box"> //This is the div that I clone for comments
<div class="KK-post_comment_user_info">
<a class="KK-post_comment_username"></a>
</div>
<div class="KK-post_comment_text"></div>
</div>
</div>
</div>
</div>
這是getPosts()
方法輸出的職位: -
function getPosts(){ //This function gets the posts and clones the html for each post
$.ajax({
type : 'GET',
url : 'fetchposts.php',
dataType: 'json',
error : function(){
$('.dash_results_bar').html('<p class="KK-post_load_error">' + "Sorry, couldn't load posts at the moment. This maybe because we are facing downtime or because the databases are being updated." + ' <a href="#" class="KK-post_load_retry">Retry</a>' + "</p>");
},
success : function(data)
{
var posts = data.posts;
if(posts.length)
{
$('.KK-post_frame:first').css("display", "block");
$(posts).each(function(index, value){
$('.KK-post_frame:first')
.clone(true)
.attr('id', (value.post_id))
.find('.KK-post_username').html(value.user_fullname)
.end()
.find('.KK-post_text').html(value.post_text)
.end()
.find('.KK-post_comment_thread').attr('data-PID', value.post_id)
.end()
.appendTo('.KK-posts_feed');
});
$('.KK-post_frame:first').css("display", "none");
}
}
});
}
這是getComments()
方法輸出下的每個崗位的評論: -
function getComments(){
$('.KK-post_comment_thread').each(function(){ // I run this method for each comment thread div inside each of my posts div
var pid = $(this).attr('data-PID'); // PID is the 'post id' that I use, to identify each comment thread div separately.
var self = this;
$.ajax({
type : 'POST',
url : 'fetchcomments.php',
data : 'pid='+pid, // I send the post id to the php script which returns the comments for the particular post in the form of json objects
error : function(){
$(self).html('<p class="KK-post_comment_load_error">' + "Sorry, couldn't load comments at the moment." + ' <a class="KK-post_comment_load_retry" href="#">Retry</a>' + "</p>");
},
success : function(data){
var comments = data.comments;
if(comments.length)
{
$('.KK-post_comment_box:first').css('display', 'block');
$(comments).each(function(index, value){
$('.KK-post_comment_box:first')
.clone(true)
.attr('id', value.comment_id)
.find('.KK-post_comment_username').html(value.user_fullname)
.end()
.find('.KK-post_comment_text').html(value.comment_text)
.end()
.appendTo(self);
});
$('.KK-post_comment_box:first').css('display', 'none');
}
}
});
});
}
這是我如何執行上述兩個功能: -
$('document').ready(function(){
$.when(getPosts()).done(function(){
getComments();
});
});
雖然getPosts()
方法執行完美並輸出該訊息,該方法getComments()
要麼不執行或不顯示出任何效果。我無法確定地說,因爲每次刷新頁面時,我只會收到帖子,而不是評論。我也檢查了我的控制檯,但沒有發現腳本的任何錯誤。當我通過點擊事件處理程序(如$('button').click(function(){ getComments(); });
)執行它時,getComments()
方法運行得非常好。因此,我知道我的兩個方法工作正常,只是我無法在頁面加載時一個接一個地執行它們。有人能幫助我解決這個奇怪的問題嗎?
感謝@Pointy,我想通了這個問題,現在它解決了。我現在意識到我發送了一個未定義的參數給$。當我只需要將'return'語句添加到'getPosts()'腳本,現在我的腳本就像魅力一樣工作。再次感謝@Pointy! – 2014-10-16 14:58:51