一个MySQL注解操作方式
Project description
AQuery 一个注解方式操作数据库的便捷库
安装
pip install AQuery
1、IQuery负责数据查询操作
不同的操作仅代表不同类型的返回值,参数都是一样 也更加语义化
操作 | 装饰器方式 | data参数 | 返回值
===========================================================
query_insert | insert | dict | lastrowid {int}
query_insert_many | insert_many | list[dict] | rowcount {int}
query_select | select | dict | fetchall {list[dict]}
query_select_one | select_one | dict | fetchone {dict}
query_update | update | dict | rowcount {int}
query_delete | delete | dict | rowcount {int}
2、关键字使用
#{key} 变量参数 预编译为 %(key)s
${key} 原样替换 ${key} -> value, 如果携带的data中不存在,会尝试从 class_object 参数中获取
@{key} 自动参数 已实现特殊参数:fields,values, data
({key}) 列表参数 ({key}) -> (1, 2, 3)
参考 https://www.bbsmax.com/A/n2d9P9gY5D/
4、kwargs 参数
class_object 传递一个类对象,用于从类中获取原样数据
ignore_errors 执行SQL 时忽略的异常
5、函数方式查询
当使用query_* 查询是,第一个参数sql,第二个参数data是dict类型
6、装饰器方式查询
当使用装饰器方式时,sql通过装饰器传递,而data通过被装饰的函数返回值传递,
如果函数没有返回值,则取被装饰函数的第一个参数,或取全部关键字参数
应用场景:
1、如果函数传入一个dict 或list,不需要携带额外参数,可以简写
@query.select("insert into student(name, age) values (#{name}, #{age})")
def insert(data):
pass
insert({'name': "Tom", 'age': 23})
2、如果需要有原样替换的字符串,需要data 返回
@query.select("insert into student ${field} values ${value}")
def insert(data):
data.update({
'field': '(name, age)',
'value': '(#{name}, #{age})'
})
return data
insert({'name': "Tom", 'age': 23})
Demo
# -*- coding: utf-8 -*-
import mysql
from aquery.query import Query
class MysqlQuery(Query):
DATABASE_CONFIG = {
"database": "data",
"user": "root",
"password": "aBc@123456",
"host": "127.0.0.1",
"port": 3306,
"autocommit": True,
"pool_name": "mypool", # 使用连接池
"pool_size": 1,
}
# 忽略的异常
IGNORE_ERRORS = (
mysql.connector.errors.IntegrityError,
)
# mysql-connector-python 连接操作mysql
# http://www.zhangdongshengtech.com/article-detials/269
# 装饰器方式使用
# 函数参数默认为data, 数据类型是一个dict,或者是None
# 当使用insert_many时 也可以是一个list
@MysqlQuery.select("select * from student where name=#{name}")
def get_student_by_name(name):
pass
# print(get_student_by_name(name="Tom"))
# 可以自定义函数参数,不过需要返回一个dict 类型的数据,传递给sql 执行器
@MysqlQuery.select("select * from student where id=#{uid}")
def get_student_by_id(uid):
pass
# print(get_student_by_id(uid=12))
# 可以自定义函数参数,不过需要返回一个dict 类型的数据,传递给sql 执行器
@MysqlQuery.select("select * from student where id in ({uids})")
def get_student_by_ids(uids):
pass
# print(get_student_by_ids(uids=[13, 23, 33]))
@MysqlQuery.insert("insert into student @{fields} values @{values}")
def insert_student(data):
pass
# data = {"name": "Tom", 'age': 23}
# print(insert_student(data))
@MysqlQuery.update("update student set @{data} where id = #{uid}")
def update_student(uid, name):
pass
# print(update_student(uid=12, name=12))
@MysqlQuery.delete("delete from student where id = #{uid}")
def delete_student(uid):
pass
# print(delete_student(uid=12))
if __name__ == '__main__':
sql = "select * from student limit 10"
# print(MysqlQuery.query(sql))
sql2 = "INSERT INTO student @{fields} VALUES @{values}"
MysqlQuery.query_insert_many(sql2, [{"name": "Tom", "age": 12}, {"name": "Tom", "age": 12}])
# -*- coding: utf-8 -*-
from demo.query_demo import MysqlQuery
from aquery.query_model import IQueryModel
class BaseQueryModel(IQueryModel):
query = MysqlQuery
class StudentModel(BaseQueryModel):
table = "student"
select_fields = "name, age"
@classmethod
@MysqlQuery.select('select ${select_fields} from ${table} where name = #{name}')
def select_by_name(cls, name):
pass
if __name__ == '__main__':
pass
# print(StudentModel.insert_many([{"name": "Tom", "age": 12}]))
# print(StudentModel.insert({"name": "Tom", "age": 12}))
# print(StudentModel.select_by_id(27))
# print(StudentModel.delete_by_id(27))
# print(StudentModel.select_by_ids([27, 25]))
# print(StudentModel.update_by_id(27, {'id': 26, "name": "--T'om", "age": 13}))
print(StudentModel.select_by_name(name='Jack'))
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