Django实现删除课程方法——Ajax

一删除基本流程

1 单击删除

2 弹出确认框

3 单击确认

4 提交数据

5 返回结果并跳转/刷新页面

二重写视图类

# 引入ListView
from django.views.generic import TemplateView, ListView, DeleteView
from django.core.urlresolvers import reverse_lazy
from django.views.generic.edit import CreateView
from django.shortcuts import redirect
import json
from django.http import HttpResponse

from .forms import CreateCourseForm
from .models import Course

from braces.views import LoginRequiredMixin

class AboutView(TemplateView):
    template_name = "course/about.html"

# 继承ListView
class CourseListView(ListView):
    # 被类所使用的数据模型，能够得到数据表中的所有记录
    model = Course
    # 传入模板的变量名称
    context_object_name = "courses"
    # 模板文件
    template_name = 'course/course_list.html'

class UserMixin:
    def get_queryset(self):
        qs = super(UserMixin, self).get_queryset()
        return qs.filter(user=self.request.user)

# 增加一个继承类LoginRequiredMixin，用于判断是否登录
class UserCourseMixin(UserMixin, LoginRequiredMixin):
    model = Course
    # 声明用户登录URL
    login_url = "/account/login/"


class ManageCourseListView(UserCourseMixin, ListView):
    context_object_name = "courses"
    template_name = 'course/manage/manage_course_list.html'

# 当用户以GET方式请求时，即在页面显示表单，CreateView就是完成这个作用的类
# 只要继承它，就不需要写get()方法了。
class CreateCourseView(UserCourseMixin, CreateView):
    # 声明在表单中显示的字段
    fields = ['title', 'overview']
    template_name = 'course/manage/create_course.html'

    def post(self, request, *args, **kargs):
        form = CreateCourseForm(data=request.POST)
        if form.is_valid():
            new_course = form.save(commit=False)
            new_course.user = self.request.user
            new_course.save()
            # 当表单内容被保存后，将页面转向指定位置
            return redirect("course:manage_course")
        # 当表单数据检测不通过时，让用户重新填写
        return self.render_to_response({"form":form})

# 继承了DeleteView类后，后续代码就不需要重复删除动作了
# 只需要声明确认删除模板template_name和删除完成之后的界面success_url
class DeleteCourseView(UserCourseMixin, DeleteView):
    template_name = 'course/manage/delete_course_confirm.html'
    success_url = reverse_lazy("course:manage_course")

    
    def dispatch(self, *args, **kwargs):
        resp = super(DeleteCourseView, self).dispatch(*args, **kwargs)
        # 如果是Ajax方法提交过来的数据，就直接反馈HttpResponse对象给前端
        if self.request.is_ajax():
            response_data = {"result": "ok"}
            return HttpResponse(json.dumps(response_data), content_type="application/json")
        else:
            return resp

三重写前端模板

{% extends "article/base.html" %}
{% load staticfiles %}
{% block title %}管理课程{% endblock %}

{% block content %}
<div>
    <div class='text-right'><a href="{% url 'course:create_course' %}"><button type="button" class="btn btn-primary">添加课程</button></a></div>
    <table class="table table-hover" style="margin-top:10px">
        <tr>
            <td>序号</td>
            <td>课程标题</td>
            <td>发布日期</td>
            <td>操作</td>
        </tr>
        {% for course in courses %}
        <tr id={{ forloop.counter }}>
            <td>{{ forloop.counter }}</td>
            <td>{{ course.title }}</a></td>
            <td>{{ course.created|date:"Y-m-d" }}</td>
            <td>
                <a name="edit" href="#"><span class="glyphicon glyphicon-pencil"></span></a>
                <a class="delete" nane="delete" href="{% url 'course:delete_course' course.id %}" ><span class="glyphicon glyphicon-trash" style="margin-left:20px;"></span></a>
                <a href="#"><span class="glyphicon glyphicon-search" style="margin-left:20px;"></span></a>
            </td>
        </tr>
        {% endfor %}
    </table>
</div>
<script type="text/javascript" src='{% static "js/jquery.js" %}'></script>
<script type="text/javascript">
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;
}
$(document).ready(function() {
    var csrftoken = getCookie('csrftoken');
    function csrfSafeMethod(method) {
        return (/^(GET|HEAD|OPTIONS|TRACE)$/.test(method));
    }
    $.ajaxSetup({
        crossDomain: false, // obviates need for sameOrigin test
        beforeSend: function(xhr, settings) {
            if (!csrfSafeMethod(settings.type)) {
                xhr.setRequestHeader("X-CSRFToken", csrftoken);
            }
        }
    });
    var onDelete = function(){
        alert("确实要删除吗?");
        $.post(this.href, function(data) {
            // 前端得到反馈结果，就完成了删除和页面刷新
            if (data.result == "ok"){
              window.location.reload();
            } else {
                alert("出现了一些问题");
            }
        }).fail(function() {
            alert("error");
        });
        return false;
    }
    $(".delete").click(onDelete);
})
</script>
{% endblock %}

四测试效果

Django实现删除课程方法——Ajax

猜你喜欢