### 定义钩子函数，定义全局用户 ``` from .views import bp import config from flask import session,g from .models import FrontUser @bp.before_request def before_request(): if config.FRONT_USER_ID in session: user_id = session.get(config.FRONT_USER_ID) user = FrontUser.query.get(user_id) if user: g.front_user = user ``` ### 判断用户是否登录 ``` {% if g.front_user %} <li class="dropdown"> <a href="#" class="dropdown-toggle" type="button" id="dropdownMenu1" data-toggle="dropdown" aria-haspopup="true" aria-expanded="true"> {{ g.front_user.username }} <span class="caret"></span> </a> <ul class="dropdown-menu" aria-labelledby="dropdownMenu1"> <li><a href="#">个人中心</a></li> <li><a href="#">设置</a></li> <li><a href="#">注销</a></li> </ul> </li> {% else %} <li><a href="{{ url_for("front.signin") }}">登陆</a></li> <li><a href="{{ url_for("front.signup") }}">注册</a></li> {% endif %} ``` ### ajax发送post请求传递数据 ``` $(function () { var ue = UE.getEditor("editor",{ 'serverUrl':'/ueditor/upload/', }); $("#submit-btn").click(function (event) { event.preventDefault(); var titleInput = $('input[name="title"]'); var boardSelect = $("select[name='board_id']"); var title = titleInput.val(); var board_id = boardSelect.val(); console.log(board_id) var content = ue.getContent(); if( !title || ! board_id || !content){ zlalert.alertInfo("请输入相应内容！"); return ; } zlajax.post({ 'url':'/apost/', 'data':{ 'title':title, 'content':content, 'board_id':board_id, }, 'success':function (data) { if(data['code'] == 200){ zlalert.alertConfirm({ 'msg':"帖子发表成功", 'cancelText':'回到首页', 'confirmText':'再发一篇帖子', 'cancelCallback':function () { window.location = '/'; }, 'confirmCallback':function () { titleInput.val(""); ue.setContent(""); } }); }else{ zlalert.alertNetworkError(); } } }); }); }); ```