测开之路一百五十三：ajax之load、get、ajax在项目中的体现

时间：2019-09-22 02:00:28 阅读：116 评论：0 收藏：0 [点我收藏+]

在查询的时候是使用ajax进行请求的

目录结构

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personal.models

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from datetime import datetime
from flask_sqlalchemy import SQLAlchemy

db = SQLAlchemy()


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=None, gender=None, job=None, birthdate=None, idcard=None, address=None, salary=None,
                 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()

html

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <script src="https://cdn.bootcss.com/jquery/2.2.4/jquery.min.js"></script>
    <title>ajax员工查询</title>
</head>
<body>
<h1>ajax员工查询</h1>
名称：<input type="text" id="name">
<p>
    <button id="btnLoad">Load查询员工</button>
    <button id="btnGet">GET查询员工</button>
    <button id="btnAjax">ajax查询员工</button>
</p>
<div id="emp-list"></div>
</body>
</html>
<script>
    $(document).ready(function () {

        // load方法
        $(‘#btnLoad‘).click(function () {
            var name = $(‘#name‘).val();  // 获取查询条件
            $(‘#emp-list‘).load(‘/employee/?name=‘ + name);  // 把查询条件和地址拼接起来
        });

        // get方法
        $(‘#btnGet‘).click(function () {
            var name = $(‘#name‘).val();  // 获取查询条件
            $.get(
                ‘/employee/‘,
                {‘name‘: name},
                function (response) {
                    $(‘#emp-list‘).html(response);  // 把返回的html加到id为emp-list的标签下
                }
            );
        });

        // ajax方法
        $(‘#btnAjax‘).click(function () {
            $.ajax({
                url: ‘/employee/‘,
                data: {‘name‘: $(‘#name‘).val()},
                method: ‘GET‘,
                success: function (response) {
                    $(‘#emp-list‘).html(response);  // 把返回的html加到id为emp-list的标签下
                }
            });
        });
    });
</script>

main.py

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from flask import Flask, render_template, request
from flask_sqlalchemy import SQLAlchemy
from personal.models import Employee

app = Flask(__name__, static_url_path=‘‘)
db = SQLAlchemy(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


@app.route(‘/employee/‘)
def employee_query():
    """ 这里图省事，就根据前端出过来的值，进行查询，并把查询出来的结果拼接成表格返回到前端 """
    name = request.args.get(‘name‘, ‘‘)
    table_header = """
    <table border="1">
        <tr>
            <th>ID</th>
            <th>姓名</th>
            <th>地址</th>
            <th>工资</th>
        </tr>
    """
    emps = Employee.query.filter(Employee.name.contains(name)).all()
    rows = ""
    for emp in emps:
        rows += f"""<tr><td>{emp.id}</td><td>{emp.name}</td><td>{emp.address}</td><td>{emp.salary}</td></tr>"""
    table_footer = "</table>"
    return table_header + rows + table_footer


@app.route(‘/ajax_query/‘)
def ajax_query():
    return render_template(‘emp-query.html‘)