我有一个编辑现有帖子的编辑表单页面。我想在这个页面上放一个预览链接。我想要的是；当我单击预览链接时，它必须；
- 获取表单元素的当前值并将它们写入我的 Post_Preview 模型。
- 然后，ajax 函数必须重定向到我在视图和 URL 中定义的 *show_preview* 页面。
- 并且必须在 show_preview 页面 (preview.html) 中呈现它。（表单的当前值）
这就是它必须的工作方式。这是我的代码：
和我的编辑表单页面：
<form method="post" action="">
{% csrf_token %}
<input type="hidden" id="post_owner" value="{{ post.owner }}"/></td>
<input type="hidden" id="post_id" value="{{ post.id }}"> </td>
{{ form.title }}
{{ form.body }}
<a href="#" id="preview">Preview</a>
<input type="submit" value="Save" style="cursor: pointer;"/>
</form>
ajax功能：
$(function(){
$('#preview').click(function() {
var title = $('#id_title').val();
var body = $('#id_body').val();
var owner = $('#post_owner').val(); //hidden value at form page
var id = $('#post_id').val(); //hidden value at form page
var ajaxOptions = {
type:'post',
url : '/admin/post/save_preview/', //save_preview's url
data : {
'title' : title,
'body' : body,
'owner' : owner,
'id' : id
},
success: function(){
window.open("/blog/"+owner+"/preview/"+id); //show_preview's url
},
error: function(){
alert('There is an Error'); //this is what i see when click preview link.
}
};
$.ajax(ajaxOptions);
});
});
我的 save_preview 视图：
def save_preview(request):
title = request.POST['title']
body = request.POST['body']
owner = request.POST['owner']
post_id = request.POST['id']
try:
preview = Post_Preview(id=post_id, title=title, body=body, owner=owner)
preview.save()
except:
pass
return HttpResponse(200)
我的 show_preview 视图：
def show_preview(request,post_id,username):
preview = Post_Preview.objects.get(id=post_id)
return render_to_response('preview.html',{'post': preview}, context_instance=RequestContext(request))
我的相关网址行：
url(r'^admin/post/save_preview/', view='save_preview' ,name='save_preview'),
url(r'^blog/(?P<username>[-\w]+)/preview/(?P<post_id>\d+)', view='show_preview', name='show_preview'),
当我在编辑表单页面单击预览链接时：它显示“有错误”错误；这是在 ajax 函数中定义的。
谢谢你！
编辑：在 js 文件中我的 ajax 函数之前有更多代码（与 django-ajax 关系有关）：
function getCookie(name) {
var cookieValue = null;
if (document.cookie && document.cookie != '') {
var cookies = document.cookie.split(';');
for (var i = 0; i < cookies.length; i++) {
var cookie = jQuery.trim(cookies[i]);
// Does this cookie string begin with the name we want?
if (cookie.substring(0, name.length + 1) == (name + '=')) {
cookieValue = decodeURIComponent(cookie.substring(name.length + 1));
break;
}
}
}
return cookieValue;
}
var csrftoken = getCookie('csrftoken');
function csrfSafeMethod(method) {
// these HTTP methods do not require CSRF protection
return (/^(GET|HEAD|OPTIONS|TRACE)$/.test(method));
}
function sameOrigin(url) {
// test that a given url is a same-origin URL
// url could be relative or scheme relative or absolute
var host = document.location.host; // host + port
var protocol = document.location.protocol;
var sr_origin = '//' + host;
var origin = protocol + sr_origin;
// Allow absolute or scheme relative URLs to same origin
return (url == origin || url.slice(0, origin.length + 1) == origin + '/') ||
(url == sr_origin || url.slice(0, sr_origin.length + 1) == sr_origin + '/') ||
// or any other URL that isn't scheme relative or absolute i.e relative.
!(/^(\/\/|http:|https:).*/.test(url));
}
$.ajaxSetup({
beforeSend: function(xhr, settings) {
if (!csrfSafeMethod(settings.type) && sameOrigin(settings.url)) {
// Send the token to same-origin, relative URLs only.
// Send the token only if the method warrants CSRF protection
// Using the CSRFToken value acquired earlier
xhr.setRequestHeader("X-CSRFToken", csrftoken);
}
}
});
编辑 2：当我为 save_preview 添加 try/except 块时；我没有抛出弹出错误页面。它重定向到 save_preview 页面并抛出错误：
Post_Preview matching query does not exist.
156. preview = Post_Preview.objects.get(id=post_id)