测开之路一百四十五：SQLAlchemy与后台模板整合之新增、查询、删除

 

 

实现在页面上点击展示页就展示内容，点击新增页就触发新增功能

 

项目结构

 

admin.__init__

from flask import Blueprint

admin = Blueprint('admin', __name__)  # 声明蓝图

# 把蓝图下的视图导进来注册到蓝图
from admin.views import *

admin.add_url_rule('/emp-list/', view_func=EmployeelListView.as_view('emp_list'))  # 展示接口
admin.add_url_rule('/emp-del//', view_func=EmployeelDeleteView.as_view('emp_del'))  # 删除接口
admin.add_url_rule('/emp-create/', view_func=EmployeeCreateView.as_view('creat_emp'))  # 新增接口

 

admin.view

# 视图层
from datetime import datetime
from flask.views import MethodView
from flask import render_template, redirect, url_for, request

from personal.models import db, Employee, Department


class EmployeelListView(MethodView):
    """ 展示员工信息 """

    def get(self):
        employees = db.session.query(Employee).limit(10)  # 取10条
        return render_template('admin/emp-list.html', employees=employees)


class EmployeelDeleteView(MethodView):
    """ 删除员工 """

    def get(self, id=None):
        if id:
            emp = db.session.query(Employee).get(id)  # get，只能根据主键查
            if emp:
                db.session.delete(emp)
                db.session.commit()
        return redirect(url_for('admin.emp_list'))


class EmployeeCreateView(MethodView):
    """ 创建员工 """

    def get(self):
        """ get请求的时候为展示信息 """
        departments = db.session.query(Department).all()
        return render_template('admin/emp-detail.html', departments=departments)

    def post(self):
        """ post请求时为新增信息 """
        emp = Employee(
            name=request.form.get('name'),
            gender=request.form.get('gender', '男'),
            job=request.form.get('job'),
            birthdate=datetime.strptime(request.form.get('birthdate'), '%Y-%m-%d'),
            idcard=request.form.get('id_card'),
            address=request.form.get('address'),
            salary=float(request.form.get('salary'))
        )
        emp.department_id = int(request.form.get('department_id'))
        db.session.add(emp)
        db.session.commit()
        return redirect(url_for('.emp_list'))

personal.__init__

 

from flask import Blueprint

# 声明蓝图
employee = Blueprint('employee', __name__)

from personal.views import *

# 把视图注册到蓝图里面
employee.add_url_rule('/list/', view_func=EmployeeListView.as_view('emp_list'))

 

personal.models

 

from datetime import datetime
from main import db


class Department(db.Model):
    """ 部门 """
    __tablename__ = 'department'
    # primary_key=True：主键, autoincrement=True：自动递增
    id = db.Column(db.Integer, primary_key=True, autoincrement=True)
    name = db.Column(db.String(50), unique=True)

    def __init__(self, name):
        self.name = name

    def __repr__(self):
        return f'部门{self.id}，{self.name}'


class Employee(db.Model):
    """ 员工 """
    __tablename__ = 'employee'
    # primary_key=True：主键, autoincrement=True：自动递增
    id = db.Column(db.Integer, primary_key=True, autoincrement=True)
    name = db.Column(db.String(50))
    gender = db.Column(db.String)
    job = db.Column(db.String)
    birthdate = db.Column(db.Date)
    idcard = db.Column(db.String)
    address = db.Column(db.String)
    salary = db.Column(db.Float)
    release_time = db.Column(db.DateTime)

    # 外键： db.Column(db.Integer, db.ForeignKey(表名))
    department_id = db.Column(db.Integer, db.ForeignKey('department.id'))  # 声明是外键，为department表的id字段

    # db.relationship('Department', backref=db.backref('employee', lazy='dynamic'))
    # db.relationship(主键类名, backref=引用属性名, lazy='dynamic'))
    # lazy：延迟查询：dynamic：动态、select、subquery、joined
    department = db.relationship('Department', backref=db.backref('employee', lazy='dynamic'))  # 类与表的关系

    def __init__(self, name, gender, job, birthdate, idcard, address, salary, release_time=None):
        self.name = name
        self.gender = gender
        self.job = job
        self.birthdate = birthdate
        self.idcard = idcard
        self.address = address
        self.salary = salary
        self.release_time = release_time if release_time else datetime.now()

    def __repr__(self):
        return f'员工：{self.id} {self.name} {self.salary} {self.address}'


if __name__ == '__main__':
    db.create_all()

personal.view

 

from flask import render_template
from flask.views import MethodView
from main import db
from .models import Employee


class EmployeeListView(MethodView):
    """ 返回前10条数据 """

    def get(self):
        employees = db.session.query(Employee).all()[:10]
        return render_template('admin/emp-list.html', employees=employees)

base.html

 

 

信息明细

 

{% extends 'admin/base.html' %}


{% block stylesheet %}

{% endblock %}


{% block page_head %}
    

        
人事列表
        

            

                
首页
                
人事管理
                
人事列表
            
        
    
{% endblock %}


{% block main_content %}
    


        

            

                

                    

                        新增员工
                    
                    

                        

                            

                                姓名
                                

                                    
                                
                            
                            

                                部门
                                

                                    
                                        {% for department in departments %}
                                            {{ department.name }}
                                        {% endfor %}
                                    
                                
                            
                            

                                性别
                                

                                    
                                        男
                                    女
                                
                            
                            

                                职位
                                

                                    
                                
                            
                            

                                生日
                                

                                                                               placeholder="">
                                
                            
                            

                                身份证号
                                

                                    
                                
                            
                            

                                地址
                                

                                    
                                
                            
                            

                                工资
                                

                                    
                                
                            

                            

                                

                                    提交
                                    
                                    返回列表
                                
                            
                        
                    
                
            
        
    
{% endblock %}


{% block script %}

{% endblock %}

员工展示列表

 

{% extends 'admin/base.html' %}


{% block stylesheet %}

{% endblock %}


{% block page_head %}
    

        
人事列表
        

            

                
首页
                
人事管理
                
人事列表
            
        
    
{% endblock %}


{% block main_content %}
    

        

            

                

                    

                        员工列表
                    
                    











                        {% for emp in employees %}








                        {% endfor %}

                        
                        
                            
编号
                            
姓名
                            
性别
                            
生日
                            
地址
                            
操作
                        
                        
                        
                            
                                
{{ emp.id }}
                                
{{ emp.name }}
                                
{{ emp.gender }}
                                
{{ emp.birthdate }}
                                
{{ emp.address }}
                                

                                    
                                    
                                                                                class="fa fa-trash-o ">
                                
                            
                        
                    
                
            
        
    
{% endblock %}


{% block script %}

{% endblock %}

主入口

 

from flask import Flask, render_template
from flask_sqlalchemy import SQLAlchemy

app = Flask(__name__, static_url_path='')  # 初始化app,
app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///./db/test.db'  # 声明数据库类型和地址
app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = True  # 跟踪改变
app.config['SQLALCHEMY_ECHO'] = True  # 打印对应的sql，此操作用sql是怎么样的

db = SQLAlchemy(app)  # 创建数据库核心对象并把数据库和app关联起来

# 由于视图需要导入db，所以需要在db产生后再导入蓝图
from personal import employee as blueprint_employee
from admin import admin as blueprint_admin

app.register_blueprint(blueprint_employee, url_prefix='/emp')
app.register_blueprint(blueprint_admin, url_prefix='/admin')


@app.route('/')
def index():
    return render_template('admin/emp-list.html')


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

数据库情况

 

 

列表页

 

新增页

 

新增成功，自动跳转到列表页

 

数据库也存在此数据

 

删除

 

 

 

 

手动插入一些数据