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MySQL chained operation of Python development

Project description

前言

Python开发的mysql链式操作,ABuilder告别繁琐的模型定义,节省开发时间,几乎没有任何要求,导入直接使用。与常规模型不同ABuilder不需要预先定义表字段、字段类型、字段长度等繁琐的设置,当然那样做有它的优点这里就不说了~,各具所长取舍看个人。ABuilder支持入直接使用,简单、快速、便捷

快速开始

  • 安装 a-sqlbuilder
pip3 install a-sqlbuilder
  • 设置数据配置文件(参照数据库配置文件说明)
  • 开始使用
from ABuilder.ABuilder import ABuilder

model = ABuilder()
data = model.table('tar_user').field("username,id").where({"username": ["like", "%M-萌%"]}).limit(0, 1).query()

使用文档

第三方库要求

  • pymysql
  • logging

数据库配置文件

我们需要开发者在项目更目录中加入database.py 数据库配置文件

确保from database import database能获取到数据库配置项

配置文件实例:

class Config(object):
    pass

class Proconfig(Config):
    pass


class Devconfig(Config):
    debug = True
    DATABASE_URI = 'mysql+pymysql://root:root@127.0.0.1:3306/target'
    data_host = '127.0.0.1' 
    data_pass = 'root'
    data_user = 'root'
    database = 'target'
    data_port = 3306
    charset = 'utf8mb4'


database = Devconfig

支持函数

目前项目只支持一些简单用法具体如下

  • table 查询表
  • where where条件
  • where_or 设置or条件
  • field 查询字段
  • limit 查询条数
  • group 分组
  • order 排序
  • join 连表查询
  • first 查询单条
  • query 查询多条
  • pluck 查询单个字段
  • insert 插入
  • update 修改
  • delete 删除
  • select 执行原生查询
  • commit 事物提交
  • rollback 事物回滚
  • get_last_sql 获取执行sql
  • get_insert_id 获取插入id

table

设置查询表

from ABuilder.ABuilder import ABuilder
data = ABuilder().table('user').limit(0,1).query()
print(data)

where

设置where条件

from Amo.ABuilder import ABuilder
ABuilder().table('user').where({"id":["=",3]}).first()

多个where条件

ABuilder().table('user').where({"id":['<=',10],"sex":["=","男"]}).query()
# 或则多个where拼接
ABuilder().table('user').where({"id":['<=',10]}).where({"sex":["=","男"]}).query()

比较符号支持 =,<>,<,>,<=,>=,in,like

where_or

设置or条件 where_or使用方法与where大同小异

from Amo.ABuilder import ABuilder
ABuilder().table('user').where_or({"id":["=",3]}).query()

比较符号支持 =,<>,<,>,<=,>=,in,like

field

设置查询字段

ABuilder().table("user").field("user_id,sex,user_name").query()
# 举例count使用
ABuilder().table("user").field("count(*) as count").query()

不设置field默认查询全部字段 *,查询字段使用,隔开,支持count(),sum()

注意:不支持类似DATE_FORMAT(NOW(),'%m-%d-%Y')这类带有%的函数

limit

查询数

ABuilder().table("user").limit(0,10).query()

limit 第一个参数为开始查询位置,第二个参数为获取多少条

group

分组

# 按照性别分组
ABuilder().table("user").field("count(*) as count").group('sex').query()

# 多个分组使用
ABuilder().table("user").field("count(*) as count").group('sex').group('age').query()
# sql为:select count(*) as count from user group by sex,age

order

排序

ABuilder().table("user").order("user_id","desc").query()

# 多个排序值
ABuilder().table("user").order("user_id","desc").order("sex",'asc').query()
# sql为:select * from tar_user order by user_id desc,sex asc

order by先后顺序:遵循从左到右

join

连表查

ABuilder().table('user as u').field('u.id,b.name').join('book b', 'u.id=b.user_id','INNER').where({"u.id": ['=', 1]}).query()

# sql为:select u.id,b.name from user as u INNER JOIN book b on u.id=b.user_id where u.id = 1

join三个参数说明

  • 表名
  • 列表条件 支持 and,or
  • join类型:INNER,LEFT,RIGHT,FULL 默认INNER

支持多个连表,拼接多个join即可。例如:table('table as t').join('table1 t1','t1.user_id=t.id').join('table2 t2','t1.id=t2.book_id')

first

查询单条记录

find = ABuilder().table('user').where({"id":["=",3]}).first()
print(find)

query

查询多条记录

data = ABuilder().table('user').where({"id":["in",(1,2,3,4)]}).query()
print(data)

pluck

查询单个字段

user_id = ABuilder().table('user').where({"username":["=",'张三']}).pluck('id')
print(user_id)

insert

插入数据

model = ABuilder()
state = model.table("user").insert({"username":"张三","sex":'男',"age":18})
if state:
    print("添加成功!自增id:%" % model.get_insert_id)
else:
    print("添加失败")

update

修改记录

state = ABuilder().table("user").where({"username":["=","张三"]}).update({"age":25})
if state:
    print('修改成功')
else:
    print('修改失败')

delete

删除记录

state = ABuilder().table("user").where({"username":["=","张三"]}).delete()
if state:
    print('删除成功')
else:
    print('删除失败')

select

执行原生sql

model = ABuilder()
# 第一种方式
model.select("SELECT username,id FROM user where id=%s", [1])
# 第二种方式
model.select("SELECT username,id FROM user where id=1")

commit,rollback

事物操作

model = ABuilder()
state = model.table("user").insert({"username":"张三","sex":'男',"age":18})
if state:
    state = model.table("book").insert({"book_name":'书本昵称',"user_id":model.get_insert_id})
if state:
    # 成功则提交事物
    model.commit()
else:
    # 失败则回滚事物
    model.rollback()

操作事物注意事项:请勿实例多个ABuilder否则一部分事物在回滚操作时回滚失败

def fun1():
    model = ABuilder()
    state = model.table("user").insert({"username":"张三","sex":'男',"age":18})
    if state:
        state = fun2()

    if state:
        model.commit()
    else:
        model.rollback()

def fun2():
    model = ABuilder()
    return  model.table("book").insert({"book_name":'书本昵称',"user_id":model.get_insert_id})

fun1()

这样如果fun2()返回失败的是失败状态回滚的只是fun1()执行的sql却无法回滚fun2()执行的sql,正确做法如下:

def fun1():
    model = ABuilder()
    state = model.table("user").insert({"username":"张三","sex":'男',"age":18})
    if state:
        state = fun2(model)

    if state:
        model.commit()
    else:
        model.rollback()

def fun2(model):
    return  model.table("book").insert({"book_name":'书本昵称',"user_id":model.get_insert_id})

fun1()

get_last_sql

获取最后一条执行sql

 model = ABuilder()
 find = model.table('user').where({"id":["=",3]}).first()
 print(model.get_last_sql)

获取sql注意事项:输出的sql对于字符串没有加上引号,导致拷贝到数据库管理工具里无法执行,处理办法:给予字符串加上单引号或双引号即可,后面维护会优化(抱歉)

get_insert_id

获取插入自增id

model = ABuilder()
model.table("user").insert({"username":"张三","sex":'男',"age":18})
print(model.get_insert_id)

class继承方式使用示例

from ABuilder.ABuilder import ABuilder
class UserModel(ABuilder):

    def __init__(self):
        self.table_name = 'user'

    def user_info(self,user_id):
        info = self.table(self.table_name).field("user_id,user_name").where({"user_id":user_id}).first()
        print(self.get_last_sql)
        return info

    def login(self):
        pass

userInfo = UserModel().user_info(user_id=1)
print(userInfo)

案例项目

目标记账+

'目标记账+'

记账+。记账与目标结合,随时随地记录每一笔交易,人情来往,多人记账,每日记账实时统计与目标距离,即时了解资金概况资金流向

感谢

项目初期是非常第一个简单版本,如有问题,写法不规范的欢迎反馈,千言万语,你懂的,我就不说了

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