一百二十七：CMS系统之添加轮播图前后台逻辑

后台逻辑

模型

from exts import db
from datetime import datetime
 
class BannerModel(db.Model):
    __tablename__ = 'banner'
    id = db.Column(db.Integer, primary_key=True, autoincrement=True)
    name = db.Column(db.String(255), nullable=False, comment='banner名')
    image_url = db.Column(db.String(255), nullable=False, comment='banner图片链接地址')
    link_url = db.Column(db.String(255), nullable=False, comment='点击banner跳转链接地址')
    priority = db.Column(db.Integer, default=0, comment='优先级')
    create_time = db.Column(db.DateTime, default=datetime.now)

manager管理

python manager.py db migrate
python manager.py db upgrade

form

class AddBannerForm(BaseForm):
    name = StringField(validators=[InputRequired(message='请输入轮播图名称')])
    image_url = StringField(validators=[InputRequired(message='请输入轮播图图片链接')])
    link_url = StringField(validators=[InputRequired(message='请输入轮播图跳转链接')])
    priority = IntegerField(validators=[InputRequired(message='请输入轮播图优先级')])

视图

@bp.route('/banners/')
@login_required
@permission_required(CMSPersmission.POSTER)
def banners():
    banners = BannerModel.query.all()
    return render_template('cms/cms_banners.html', banners=banners)
 
@bp.route('/abanners/', methods=['POST'])
@login_required
@permission_required(CMSPersmission.POSTER)
def abanners():
    """ 添加banner图 """
    form = AddBannerForm(request.form)
    if form.validate():
        name = form.name.data
        image_url = form.image_url.data
        link_url = form.link_url.data
        priority = form.priority.data
        banner = BannerModel(name=name, image_url=image_url, link_url=link_url, priority=priority)
        db.session.add(banner)
        db.session.commit()
        return restful.success()
    else:
        return restful.params_error(form.get_error())

模板中渲染轮播图信息

<tbody>
    {% for banner in banners %}
        <tr>
            <td>{{ banner.name }}</td>
            <td><a href="{{ banner.image_url }}" target="_blank">{{ banner.image_url }}</a></td>
            <td><a href="{{ banner.link_url }}" target="_blank">{{ banner.link_url }}</a></td>
            <td>{{ banner.priority }}</td>
            <td>{{ banner.create_time }}</td>
            <td>
                <button class="btn btn-default btn-xs">编辑</button>
                <button class="btn btn-danger btn-xs">删除</button>
            </td>
        </tr>
    {% endfor %}
</tbody>

因为后面会有很多地方用到top-box，所以把top-box的css放到base里面

js

$(function () {
   $('#save-banner-btn').click(function (event) {
       event.preventDefault();
       var dialog = $('#banner-dialog');
       var nameInput = $('input[name="name"]');
       var imageInput = $('input[name="image_url"]');
       var linkInput = $('input[name="link_url"]');
       var priorityInput = $('input[name="priority"]');
 
       var name = nameInput.val();
       var image_url = imageInput.val();
       var link_url = linkInput.val();
       var priority = priorityInput.val();
 
       if(!name || !image_url || !link_url || !priority ){
           xtalert.alertInfoToast('请输入完整数据');
           return;
       }
       ajax.post({
           'url': '/cms/abanners/',
           'data': {
               'name': name,
               'image_url': image_url,
               'link_url': link_url,
               'priority': priority
           },
           'success': function (data) {
               dialog.modal('hide');  // 隐藏模态框
               if(data['code'] == 200){
                   // 重新加载当前页面
                   window.location.reload();
               }else{
                   xtalert.alertInfo(data['message']);
               }
           },
           'fail': function (error) {
                xtalert.alertNetworkError();
           }
 
       });
   });
});

模板中引用js

操作