详解python Todo清单实战

Todo清单

需要实现的功能有添加任务、删除任务、编辑任务，操作要关联数据库。

任务需要绑定用户，部门。用户需要绑定部门。

{#自己编写一个基类模板#}
{% extends 'bootstrap/base.html' %}

{% block styles %}
{{ super() }}
  <link rel="stylesheet" href="../static/css/main.css" rel="external nofollow" >
{% endblock %}
{% block navbar %}
<nav class="navbar navbar-default">
  <div class="container-fluid">
    <!-- Brand and toggle get grouped for better mobile display -->
    <div class="navbar-header">
      <button type="button" class="navbar-toggle collapsed" data-toggle="collapse"
          data-target="#bs-example-navbar-collapse-1" aria-expanded="false">
        <span class="sr-only">Toggle navigation</span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
      </button>
      <a class="navbar-brand" href="index.html" rel="external nofollow" ></a>
    </div>

    <!-- Collect the nav links, forms, and other content for toggling -->
    <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
      <ul class="nav navbar-nav">
        <li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >首页<span class="sr-only">(current)</span></a></li>
        <li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >新闻</a></li>
        <li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >国际</a></li>
        <li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >国内</a></li>
        <li><a href="/sysinfo/" rel="external nofollow" >系统信息</a></li>
        <li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >登陆用户</a></li>
      </ul>
      <ul class="nav navbar-nav navbar-right">

        {% if 'user' in session %}
        <li><a href="login.html" rel="external nofollow" ><span class="glyphicon glyphicon-user"></span>
             {{ session.user }}</a></li>
        <li><a href="/logout/" rel="external nofollow" ><span class="glyphicon glyphicon-log-in"></span>
             注销 </a></li>

        {% else %}

        <li><a href="/login/" rel="external nofollow" ><span class="glyphicon glyphicon-log-in"></span>
            登陆</a></li>
        {% endif %}

        <li><a href="/register/" rel="external nofollow" ><span class="glyphicon glyphicon-log-out"></span>
            注册</a></li>
      </ul>
    </div><!-- /.navbar-collapse -->
  </div><!-- /.container-fluid -->
</nav>
{% endblock %}

{% block content %}
{#定义属于自己的block#}
  {% block newcontent %}

  {% endblock %}

  {% block footer %}
<div class="footer" style="margin: 0 auto">

    宇宙大魔王

</div>
{% endblock %}
{% endblock %}

{#列表清单#}
{% extends 'base.html' %}

{% block newcontent %}
  <div class="row">
    <div class="col-md-6 col-md-offset-3">
      /*添加任务*/
      <form class="form-horizontal" action="/todo/add/" method="post">
        <div class="form-group">
          {# 添加框          #}
          <div class="col-sm-9">
            <input type="text" class="form-control" placeholder="请添加任务" required="required"
                name="todo_name">
          </div>
          {#  选择框       #}
          <div class="col-sm-2">
            <select class="form-control" name="part">
              {% for part in parts %}
                <option value="{{ part.id }}">{{ part.name }}</option>
              {% endfor %}
            </select>
          </div>

          {#  添加的按钮       #}
          <div class="col-sm-1">
            <input type="submit" class="btn btn-success" value="添加任务">
          </div>
        </div>

      </form>

      /*任务显示*/
      <h1>添加任务</h1>
      <table class="table table-bordered">
        <tr>
          <td>任务内容</td>
          <td>创建时间</td>
          <td>状态</td>
          <td>所属部门</td>
          <td>操作</td>
        </tr>
        {% for todo in todos %}
          <tr>
            <td>{{ todo.name }}</td>
            <td>{{ todo.add_time }}</td>
            {#    #}
            <td>
              {% if todo.status %}
                 <a href="/todo/undo/{{ todo.id }}/" rel="external nofollow" class="btn btn-sm btn-success" role="button"><span
              class="glyphicon glyphicon-remove"></span> 已完成</a>

              {% else %}
                <a href="/todo/done/{{ todo.id }}/" rel="external nofollow" class="btn btn-sm btn-warning" role="button"><span
              class="glyphicon glyphicon-remove"></span> 未完成</a>

              {% endif %}

            </td>
            <td>{{ todo.depart.name }}</td>
            <td>
{#              <a href="/todo/delete/{{ todo.id }}/" rel="external nofollow" rel="external nofollow" role="button">删除</a>#}
{#              <a href="/todo/delete/{{ todo.id }}/" rel="external nofollow" rel="external nofollow" class="btn btn-primary btn-lg active" role="button">删除</a>#}
                <a href="/todo/delete/{{ todo.id }}/" rel="external nofollow" class="btn btn-danger" role="button"><span
              class="glyphicon glyphicon-remove"></span> 删除</a>
            </td>
          </tr>

        {% endfor %}

      </table>
    </div>
  </div>

{% endblock %}

# 数据库操作文件 todo_models.py
from datetime import datetime
import pymysql
from flask import Flask
from flask_sqlalchemy import SQLAlchemy
from flask_bootstrap import Bootstrap
app = Flask(__name__)
app.config['SQLALCHEMY_DATABASE_URI'] = 'mysql+pymysql://root:sheen@localhost/todo'
app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = True
db = SQLAlchemy(app)
bootstrap = Bootstrap(app)

class User(db.Model):
  id = db.Column(db.INTEGER,autoincrement=True,primary_key=True)
  name = db.Column(db.String(30),unique=True)
  pwd = db.Column(db.String(30))
  add_time = db.Column(db.DateTime, default=datetime.now())
  phone = db.Column(db.String(11))
  email = db.Column(db.String(18),unique=True)
  info = db.Column(db.TEXT)
  department_id = db.Column(db.INTEGER,db.ForeignKey('department.id'))  #部门id与其他表关联
  todo_id = db.relationship('Todo',backref = 'user')
  def __repr__(self):
    return '<User:%s>' %(self.name)
class Department(db.Model):
  id = db.Column(db.INTEGER,autoincrement=True,primary_key=True)
  name = db.Column(db.String(30),unique=True)
  users = db.relationship('User',backref = 'depart')
  todos = db.relationship('Todo',backref = 'depart')
  def __repr__(self):
    return '<Depart:%s>' %(self.name)

class Todo(db.Model):
  id = db.Column(db.INTEGER,autoincrement=True,primary_key=True)
  name = db.Column(db.String(30))
  add_time = db.Column(db.DateTime, default=datetime.now())
  status = db.Column(db.Boolean, default=False)
  department_id = db.Column(db.INTEGER,db.ForeignKey('department.id'))  #部门id与其他表关联
  user_id = db.Column(db.INTEGER,db.ForeignKey('user.id'))
  def __repr__(self):
    return '<Todo:%s>' % (self.name)
if __name__ == '__main__':
  db.drop_all()
  db.create_all()
  parts = ['人事部','Python开发部','Java开发部']
  partObj = [Department(name=part) for part in parts]
  db.session.add_all(partObj)
  db.session.commit()

  user_1 = User(name='sheen',pwd='123',department_id=2)
  db.session.add(user_1)
  db.session.commit()

# 试图函数程序 todo_views.py
from flask import render_template, url_for, request, redirect
from todo_models import app,Todo,Department,db

@app.route('/')
def index():
  return render_template('base.html')

@app.route('/login/')
def login():
  return render_template('todo_login.html')
@app.route('/list/')
def todo_list():
  todos = Todo.query.all()
  parts = Department.query.all()
  return render_template('todo_list.html',todos=todos,parts=parts)
@app.route('/todo/add/',methods=['POST'])
def add():
  name = request.form['todo_name']  #在todo_list.html文件中表单定义的添加任务input属性name="todo_name"。
  part = request.form['part']
  todo = Todo(name=name,department_id=part,user_id=1)
  db.session.add(todo)
  db.session.commit()
  print('ok')
  return redirect(url_for('todo_list'))
@app.route('/todo/undo/<int:id>/')
def undo(id):
  todo = Todo.query.filter_by(id=id).first()
  todo.status = False
  db.session.commit()
  return redirect(url_for('todo_list'))

@app.route('/todo/done/<int:id>/')
def done(id):
  todo = Todo.query.filter_by(id=id).first()
  todo.status = True
  db.session.commit()
  return redirect(url_for('todo_list'))

@app.route('/todo/delete/<int:id>/')
def todo_del(id):
  todo = Todo.query.filter_by(id=id).first()
  db.session.delete(todo)
  db.session.commit()
  return redirect(url_for('todo_list'))

# 主程序 run.py
from flask import Flask
from todo_models import app
from todo_views import *

if __name__ == '__main__':
  app.run()

list 页面最初显示图

当添加任务后，页面显示如下

当鼠标点击任务状态时，会发生改变

当点击删除按钮时，任务从数据库中删除，也不在页面中显示

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