python16_day20【Django_继续抽屉项目】

一、djangoAdmin和表结构

　　1.项目名称

　　　　python manage startapp web　　　　# 前端页面

　　　　python manage startapp repository   # 只是数据库

　　　　python manage startapp backend      # 后台管理

　　2.repository/models.py

from django.db import models

# Create your models here.

class UserInfo(models.Model):
    nid = models.AutoField(primary_key=True)
    username = models.CharField(max_length=32, unique=True)
    password = models.CharField(max_length=32)
    email = models.CharField(max_length=32, unique=True)
    ctime = models.DateTimeField()

    class Meta:
        verbose_name_plural = '用户表'    # 在django中显示表名称

    def __str__(self):
        return self.username
        # 显示字段对象名称

class NewsType(models.Model):
    nid = models.AutoField(primary_key=True)
    caption = models.CharField(max_length=32)

    class Meta:
        verbose_name_plural = "新闻类型"

    def __str__(self):
        return self.caption

class News(models.Model):
    nid = models.AutoField(primary_key=True)
    user_info = models.ForeignKey('UserInfo')
    news_type = models.ForeignKey('NewsType')
    title = models.CharField(max_length=32, db_index=True)
    url = models.CharField(max_length=128, null=True, blank=True)
    content = models.CharField(max_length=50)
    favor_count = models.IntegerField(default=0)
    comment_count = models.IntegerField(default=0)
    ctime = models.DateTimeField()
    img = models.CharField(max_length=32, default="/static/images/1.jpg")

    class Meta:
        verbose_name_plural = '新闻'

    def __str__(self):
        return self.title

class Favor(models.Model):
    nid = models.AutoField(primary_key=True)
    user_info = models.ForeignKey('UserInfo')
    news = models.ForeignKey('News')
    ctime = models.DateTimeField()

    def __str__(self):
        return "{0}<{1}>".format(self.news.title, self.user_info.username)

    class Meta:
        verbose_name_plural = '点赞记录'
        unique_together = (
            ("user_info", "news"),
        )

class Comment(models.Model):
    nid = models.AutoField(primary_key=True)
    user_info = models.ForeignKey('UserInfo')
    news = models.ForeignKey('News')
    ctime = models.DateTimeField()
    device = models.CharField(max_length=16, null=True, blank=True)
    content = models.CharField(max_length=150)
    reply_id = models.ForeignKey('Comment', related_name='b', null=True, blank=True)

    class Meta:
        verbose_name_plural = '评论表'

　　3.repository/admin.py

 from django.contrib import admin
 from repository.models import *

 # Register your models here.
 admin.site.register(UserInfo)
 admin.site.register(Comment)
 admin.site.register(Favor)
 admin.site.register(News)
 admin.site.register(NewsType)

　　4. python manage.py createsuperuser

　　5. settings.py 注册项目　　

 INSTALLED_APPS = [
     'django.contrib.admin',
     'django.contrib.auth',
     'django.contrib.contenttypes',
     'django.contrib.sessions',
     'django.contrib.messages',
     'django.contrib.staticfiles',
     'repository',
 ]

　　6.python manage.py makemigrations

　　　python manage.py migrate

　　7.http://127.0.0.1:8000/admin

　　8.备注：

　　　　允许为空：null=True,blank=True(djangoAdmin需要)

二、点赞

　　1.templates/index.html

<script src="/static/jquery.js"></script>
    <script>
        function doFavor(ths,nid) {

            if ($('#tl').attr('login') == "true"){
                $.ajax({
                url: '/do-favor/',
                type: "GET",
                data: {nid: nid},
                dataType: 'JSON',
                success:function (arg) {
                    if(arg.status == 1){
                        // -1
                        var favorCount = $(ths).find('.favor-count').text();
                        favorCount = parseInt(favorCount);
                        favorCount = favorCount -1;
                        $(ths).find('.favor-count').text(favorCount);
                        ZMM(ths,"-1");

                    }else if(arg.status == 2){
                        // +1
                        var favorCount = $(ths).find('.favor-count').text();
                        favorCount = parseInt(favorCount);
                        favorCount = favorCount + 1;
                        $(ths).find('.favor-count').text(favorCount);
                        ZMM(ths,"+1");

                    }else{
                        location.href = '/login/';
                    }
                }
            })
            }else{
                location.href = '/login/';
            }
        }

        function ZMM(ths,txt) {
            var fontSize = 5;
            var left = 5;
            var top = 5;
            var opacity = 1;

            var tag = document.createElement('span');
            tag.innerHTML = txt;
            tag.style.position = "absolute";
            tag.style.fontSize = fontSize + 'px';
            tag.style.left = left+ 'px';
            tag.style.top = top+ 'px';
            tag.style.opacity = opacity;
            $(ths).append(tag);

            var obj = setInterval(function () {
                fontSize = fontSize + 5;
                left = left + 5;
                top = top - 5;
                opacity = opacity - 0.1;
                tag.style.fontSize = fontSize + 'px';
                tag.style.left = left+ 'px';
                tag.style.top = top+ 'px';
                tag.style.opacity = opacity;
                if(left > 60){
                    clearInterval(obj);
                    tag.remove();
                }
            },100);
        }
    </script>

　　2.web/views.py

 def do_favor(request):
     """
     1. 获取新闻ID
     2. 当前登录的用户ID
     3. 在favor表中插入数据
     4. 新闻表中的favor_count + 1
     :param request:
     :return:
     """
     ret = {'status': 0, 'error': ''}
     if request.session.get('is_login'):
         news_id = request.GET.get('nid')
         current_user_id = request.session['user_info']['user_id']
         ct = models.Favor.objects.filter(user_info_id=current_user_id,news_id=news_id).count()
         if ct:
             models.Favor.objects.filter(user_info_id=current_user_id, news_id=news_id).delete()
             news_obj = models.News.objects.filter(nid=news_id).first()
             temp = news_obj.favor_count - 1
             models.News.objects.filter(nid=news_id).update(favor_count=temp)
             ret['status'] = 1
         else:
             models.Favor.objects.create(user_info_id=current_user_id,news_id=news_id)
             news_obj = models.News.objects.filter(nid=news_id).first()
             temp = news_obj.favor_count + 1
             models.News.objects.filter(nid=news_id).update(favor_count=temp)
             ret['status'] = 2
     return HttpResponse(json.dumps(ret))

三、评论区

　　注意：1张表自关联，使用了replay_id,通过python字典，列表数据类型的引用特性处理。需要使用迭代方式处理，最后返回给前端。其实后端不应该处理标签，应该放在前端处理。

　　1.web/views.py

 def comment(request):
     # 模拟数据
     # comment_list = [
     #     {'id': 1, 'news_id': 1, 'user_id': 10, 'content': "写的什么玩意呀", 'reply_id': None},
     #     {'id': 2, 'news_id': 1, 'user_id': 11, 'content': "还真不是玩意 ", 'reply_id': 1},
     #     {'id': 3, 'news_id': 1, 'user_id': 12, 'content': "写的真好 ", 'reply_id': 1},
     #     {'id': 4, 'news_id': 1, 'user_id': 11, 'content': "写的真好 ", 'reply_id': 3},
     #     {'id': 5, 'news_id': 1, 'user_id': 19, 'content': "balabala ", 'reply_id': None},
     #     {'id': 6, 'news_id': 1, 'user_id': 11, 'content': "你可以趣事了 ", 'reply_id': 2},
     #     {'id': 7, 'news_id': 1, 'user_id': 11, 'content': "号的", 'reply_id': 6},
     # ]
     comment_list = []

     new_nid = request.GET.get('nid')
     obj = News.objects.filter(nid=new_nid)[0]
     for row in obj.comment_set.values():
         comment_list.append(row)

     # 一.变成字典,id为K, 字典为V
     comment_dict = {}
     for row in comment_list:
         row['child'] = []  # 增加空字段
         comment_dict[row['nid']] = row  # ID做为K,行数据做V

     # 二.找到replay_id后,加到后面的child, python数据类型,除了int,str其它都是引用.
     for row in comment_list:
         if row['reply_id_id']:
             replay_id = row['reply_id_id']
             comment_dict[replay_id]['child'].append(row)

     # 三.这样回复链就做好了.
     commen_reuslt = {}
     for k, v in comment_dict.items():
         if v['reply_id_id'] == None:
             commen_reuslt[k] = v

     commen_reuslt = create_html(commen_reuslt)
     return HttpResponse(json.dumps(commen_reuslt, ensure_ascii=False))

 def create_child_node(child_comment):
     prev = """
         <div class="comment1">
             <div class="content1">
         """
     for child in child_comment:
         tpl = '<div class="item">%s</div>'
         content = tpl % child['content']
         prev = prev + content
         if child['child']:
             # 有子评论
             node = create_child_node(child['child'])
             prev = prev + node

     end = """
             </div>
         </div>
         """
     return prev + end

 def create_html(comment_result):
     prev = """
     <div class="comment1">
         <div class="content1">
     """

     for k,v in comment_result.items():
         tpl = '<div class="item">%s</div>'
         content = tpl %v['content']
         prev = prev + content
         if v['child']:
             # 有子评论
             node = create_child_node(v['child'])
             prev = prev + node

     end = """
         </div>
     </div>
     """
     return prev + end

　　2.templates/index.html

             <div id="comment_area_{{item.nid}}" class="comment-box-area hide" >
                                     <div class="pinglun arrow"></div>
                                     <a class="pinglun close-comt" title="关闭" href="javascript:void(0);"></a>
                                     <div class="corner comment-box clearfix" >
                                         <div class="loading-ico loading-ico-top"  style="margin-left:230px;">加载中，请稍候...</div>
                                         <div class="comment-box-top " >
                                             <div class="tip-1">最热评论(<span>{{item.8}}</span>)</div>
                                             <div class="tip-2">
                                                 <a href="#" target="_blank">
                                                     <em class="pinglun em1"></em>
                                                     <span>去评论页面</span>
                                                 </a>
                                             </div>
                                         </div>
                                         <ul id="comment_list_{{item.nid}}" class="filetree comment-list-top-2 treeview ">

                                         </ul>

 function ToggleCommentArea(nid){
         var $comment_area = $("#comment_area_" + nid);
         if($comment_area.hasClass('hide')){
             $comment_area.removeClass('hide');
             var $comment_list = $("#comment_list_" + nid);
             $.ajax({
                 url: '/comment/',
                 type: 'GET',
                 data: {nid: nid},
                 dataType:"JSON",
                 success: function(arg){
                     $comment_list.empty();
                     $comment_list.append(arg);
                     var $loading = $comment_area.find('.comment-box').children().first();
                     $loading.addClass('hide');
                     $loading.siblings().removeClass('hide');
                 }
             })
         }else{
             $comment_area.addClass('hide');
         }
     }

四、kingeditor

http://www.cnblogs.com/wupeiqi/articles/6307554.html