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app.py
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app.py
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from datetime import datetime
from flask import Flask, render_template, redirect, flash, url_for
from flask_sqlalchemy import SQLAlchemy
from forms import NewsForm
app = Flask(__name__)
app.config['SQLALCHEMY_DATABASE_URI'] = 'mysql://root:123456@localhost:3306/newsystem?charset=utf8'
app.config["SECRET_KEY"] = "12345678"
db = SQLAlchemy(app)
# 新闻类型
class News(db.Model):
__tablename__ = 'news'
id = db.Column(db.Integer, primary_key=True)
title = db.Column(db.String(200), nullable=False)
content = db.Column(db.String(2000), nullable=False)
types = db.Column(db.String(10), nullable=False)
image = db.Column(db.String(1300), )
author = db.Column(db.String(20), )
view_count = db.Column(db.Integer)
created_at = db.Column(db.DateTime)
is_valid = db.Column(db.Boolean)
def __repr__(self):
return '<News %r>' % self.title
@app.route('/index/')
def index():
# 新闻首页
news_list = News.query.all()
# print(news_list)
return render_template('index.html', news_list=news_list)
@app.route('/')
def index_html():
# 新闻首页
news_list = News.query.all()
return redirect('/')
@app.route('/cat/<name>/')
def category(name):
# 查询新闻类别
news_list = News.query.filter(News.types == name)
return render_template('category.html', name=name, news_list=news_list)
@app.route('/detail/<int:pk>/')
def detail(pk):
# 查询新闻的详细信息
obj = News.query.get(pk)
return render_template('detail.html', obj=obj)
# 数据后端
@app.route('/admin/')
@app.route('/admin/<int:page>/')
def admin(page=None):
'''后台新闻列表'''
if page is None:
page = 1
news_list = News.query.filter_by(is_valid=True).paginate(page=page, per_page=10)
return render_template('admin/index.html', news_list=news_list)
@app.route('/admin/update/<int:pk>/', methods=['GET', 'POST'])
def admin_update(pk):
'''后台新闻列表'''
new_obj = News.query.get(pk)
if not new_obj:
return redirect(url_for('admin'))
form = NewsForm(obj=new_obj)
if form.validate_on_submit():
new_obj.title = form.title.data
new_obj.content = form.content.data
new_obj.types = form.types.data
new_obj.author = form.author.data
new_obj.created_at = datetime.now()
# 保存数据
db.session.add(new_obj)
db.session.commit()
# 文字提示flash消息闪现
flash('修改成功')
return redirect('/admin/')
return render_template('admin/update.html', new_obj=new_obj, form=form)
@app.route('/admin/add/')
def admin_add():
'''跳转到后台新闻列表'''
form = NewsForm()
return render_template('admin/add.html', form=form)
@app.route('/admin/do_add/', methods=['POST'])
def admin_do_add():
''' 新增新闻信息 '''
form = NewsForm()
if form.validate_on_submit():
# 获取数据
new_obj = News(
title=form.title.data,
content=form.content.data,
types=form.types.data,
image=form.image.data,
author=form.author.data,
created_at=datetime.now(),
view_count=0,
is_valid=True
)
# 保存数据
db.session.add(new_obj)
db.session.commit()
# 文字提示flash消息闪现
flash('添加成功')
return redirect('/admin/')
@app.route('/admin/delete/<int:pk>/', methods=['GET', 'POST'])
def admin_delete(pk):
''' 删除新闻信息 '''
new_obj = News.query.get(pk)
if not new_obj:
return redirect('/404/')
db.session.delete(new_obj)
db.session.commit()
return redirect('/admin/')
if __name__ == '__main__':
app.run(debug=True)