#-*-coding:utf-8-*- #__author__ = "logan.xu" import sqlalchemy from sqlalchemy import create_engine,func from sqlalchemy.ext.declarative import declarative_base from sqlalchemy import Column,Integer,String,ForeignKey,DATE from sqlalchemy.orm import sessionmaker,relationship engine=create_engine("mysql+pymysql://root:12345678@localhost/news",encoding='utf-8',echo=True) Base=declarative_base() class Student(Base): __tablename__='student' id=Column(Integer,primary_key=True) name=Column(String(32),nullable=False) register_date=Column(DATE,nullable=False) def __repr__(self): return "<%s name:%s>" % (self.id,self.name) class StudyRecord(Base): __tablename__ = 'study_record' id = Column(Integer, primary_key=True) day = Column(Integer,nullable=False) status = Column(String(32),nullable=False) stu_id = Column(Integer,ForeignKey("student.id")) def __repr__(self): return "<%s name:%s>" % (self.id,self.day) #---------------1.创建表-----------------#
Base.metadata.create_all(engine)
#---------------------------------------# Session_class = sessionmaker(bind=engine) Session = Session_class() #---------------2.写入数据-----------------# s1=Student(name='Alex',register_date="2019-01-09") s2=Student(name='Jack',register_date="2019-01-09") s3=Student(name='Rain',register_date="2019-01-10") s4=Student(name='Eric',register_date="2019-01-11") s5=Student(name='John',register_date="2019-01-12") # study_obj1=StudyRecord(day=1,status="Yes",stu_id=1) study_obj2=StudyRecord(day=2,status="NO",stu_id=1) study_obj3=StudyRecord(day=3,status="Yes",stu_id=1) study_obj4=StudyRecord(day=1,status="NO",stu_id=2) study_obj5=StudyRecord(day=1,status="NO",stu_id=2) # ## 写入数据 并调用 study_record字段插入数据 为 Student数据
Session.add_all([s1,s2,s3,s4,s5,study_obj1,study_obj2,study_obj3,study_obj4,study_obj5]) #---------------------------------------# # 执行事务 Session.commit()
/Users/drizzle/PycharmProjects/2018-12-03/venv/bin/python /Users/drizzle/PycharmProjects/2018-12-03/orm_fk.py 2019-01-08 18:08:40,496 INFO sqlalchemy.engine.base.Engine SHOW VARIABLES LIKE 'sql_mode' 2019-01-08 18:08:40,496 INFO sqlalchemy.engine.base.Engine {} 2019-01-08 18:08:40,498 INFO sqlalchemy.engine.base.Engine SHOW VARIABLES LIKE 'lower_case_table_names' 2019-01-08 18:08:40,498 INFO sqlalchemy.engine.base.Engine {} 2019-01-08 18:08:40,500 INFO sqlalchemy.engine.base.Engine SELECT DATABASE() 2019-01-08 18:08:40,500 INFO sqlalchemy.engine.base.Engine {} 2019-01-08 18:08:40,501 INFO sqlalchemy.engine.base.Engine show collation where `Charset` = 'utf8mb4' and `Collation` = 'utf8mb4_bin' 2019-01-08 18:08:40,501 INFO sqlalchemy.engine.base.Engine {} 2019-01-08 18:08:40,504 INFO sqlalchemy.engine.base.Engine SELECT CAST('test plain returns' AS CHAR(60)) AS anon_1 2019-01-08 18:08:40,504 INFO sqlalchemy.engine.base.Engine {} 2019-01-08 18:08:40,504 INFO sqlalchemy.engine.base.Engine SELECT CAST('test unicode returns' AS CHAR(60)) AS anon_1 2019-01-08 18:08:40,504 INFO sqlalchemy.engine.base.Engine {} 2019-01-08 18:08:40,505 INFO sqlalchemy.engine.base.Engine SELECT CAST('test collated returns' AS
CHAR CHARACTER SET utf8mb4) COLLATE utf8mb4_bin AS anon_1 2019-01-08 18:08:40,505 INFO sqlalchemy.engine.base.Engine {} 2019-01-08 18:08:40,506 INFO sqlalchemy.engine.base.Engine DESCRIBE `student` 2019-01-08 18:08:40,506 INFO sqlalchemy.engine.base.Engine {} 2019-01-08 18:08:40,507 INFO sqlalchemy.engine.base.Engine DESCRIBE `study_record` 2019-01-08 18:08:40,507 INFO sqlalchemy.engine.base.Engine {} 2019-01-08 18:08:40,511 INFO sqlalchemy.engine.base.Engine BEGIN (implicit) 2019-01-08 18:08:40,512 INFO sqlalchemy.engine.base.Engine INSERT INTO student (name, register_date) VALUES (%(name)s, %(register_date)s) 2019-01-08 18:08:40,512 INFO sqlalchemy.engine.base.Engine {'name': 'Alex', 'register_date': '2019-01-09'} 2019-01-08 18:08:40,513 INFO sqlalchemy.engine.base.Engine INSERT INTO student (name, register_date) VALUES (%(name)s, %(register_date)s) 2019-01-08 18:08:40,513 INFO sqlalchemy.engine.base.Engine {'name': 'Jack', 'register_date': '2019-01-09'} 2019-01-08 18:08:40,513 INFO sqlalchemy.engine.base.Engine INSERT INTO student (name, register_date) VALUES (%(name)s, %(register_date)s) 2019-01-08 18:08:40,514 INFO sqlalchemy.engine.base.Engine {'name': 'Rain', 'register_date': '2019-01-10'} 2019-01-08 18:08:40,514 INFO sqlalchemy.engine.base.Engine INSERT INTO student (name, register_date) VALUES (%(name)s, %(register_date)s) 2019-01-08 18:08:40,514 INFO sqlalchemy.engine.base.Engine {'name': 'Eric', 'register_date': '2019-01-11'} 2019-01-08 18:08:40,515 INFO sqlalchemy.engine.base.Engine INSERT INTO student (name, register_date) VALUES (%(name)s, %(register_date)s) 2019-01-08 18:08:40,515 INFO sqlalchemy.engine.base.Engine {'name': 'John', 'register_date': '2019-01-12'} 2019-01-08 18:08:40,516 INFO sqlalchemy.engine.base.Engine INSERT INTO study_record (day, status, stu_id) VALUES (%(day)s, %(status)s, %(stu_id)s) 2019-01-08 18:08:40,516 INFO sqlalchemy.engine.base.Engine {'day': 1, 'status': 'Yes', 'stu_id': 1} 2019-01-08 18:08:40,517 INFO sqlalchemy.engine.base.Engine INSERT INTO study_record (day, status, stu_id) VALUES (%(day)s, %(status)s, %(stu_id)s) 2019-01-08 18:08:40,517 INFO sqlalchemy.engine.base.Engine {'day': 2, 'status': 'NO', 'stu_id': 1} 2019-01-08 18:08:40,517 INFO sqlalchemy.engine.base.Engine INSERT INTO study_record (day, status, stu_id) VALUES (%(day)s, %(status)s, %(stu_id)s) 2019-01-08 18:08:40,517 INFO sqlalchemy.engine.base.Engine {'day': 3, 'status': 'Yes', 'stu_id': 1} 2019-01-08 18:08:40,518 INFO sqlalchemy.engine.base.Engine INSERT INTO study_record (day, status, stu_id) VALUES (%(day)s, %(status)s, %(stu_id)s) 2019-01-08 18:08:40,518 INFO sqlalchemy.engine.base.Engine {'day': 1, 'status': 'NO', 'stu_id': 2} 2019-01-08 18:08:40,518 INFO sqlalchemy.engine.base.Engine INSERT INTO study_record (day, status, stu_id) VALUES (%(day)s, %(status)s, %(stu_id)s) 2019-01-08 18:08:40,518 INFO sqlalchemy.engine.base.Engine {'day': 1, 'status': 'NO', 'stu_id': 2} 2019-01-08 18:08:40,519 INFO sqlalchemy.engine.base.Engine COMMIT Process finished with exit code 0
mysql> show tables; +----------------+ | Tables_in_news | +----------------+ | address | | customer | | student | | study_record | | user | +----------------+ 5 rows in set (0.01 sec) mysql> desc student; +---------------+-------------+------+-----+---------+----------------+ | Field | Type | Null | Key | Default | Extra | +---------------+-------------+------+-----+---------+----------------+ | id | int(11) | NO | PRI | NULL | auto_increment | | name | varchar(32) | NO | | NULL | | | register_date | date | NO | | NULL | | +---------------+-------------+------+-----+---------+----------------+ 3 rows in set (0.00 sec) mysql> desc study_record; +--------+-------------+------+-----+---------+----------------+ | Field | Type | Null | Key | Default | Extra | +--------+-------------+------+-----+---------+----------------+ | id | int(11) | NO | PRI | NULL | auto_increment | | day | int(11) | NO | | NULL | | | status | varchar(32) | NO | | NULL | | | stu_id | int(11) | YES | MUL | NULL | | +--------+-------------+------+-----+---------+----------------+ 4 rows in set (0.00 sec) mysql> select * from student; Empty set (0.00 sec) mysql> select * from stuy_record; ERROR 1146 (42S02): Table 'news.stuy_record' doesn't exist mysql> mysql> select * from study_record; Empty set (0.00 sec) mysql> show tables; +----------------+ | Tables_in_news | +----------------+ | address | | customer | | student | | study_record | | user | +----------------+ 5 rows in set (0.00 sec) mysql> show create table student; +---------+-------------------------------------------------------------+ | Table | Create Table | +---------+-------------------------------------------------------------+ | student | CREATE TABLE `student` ( `id` int(11) NOT NULL AUTO_INCREMENT, `name` varchar(32) NOT NULL, `register_date` date NOT NULL, PRIMARY KEY (`id`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci | +---------+-------------------------------------------------------------+ 1 row in set (0.00 sec) mysql> show create table study_record; +--------------+-------------------------------------------------------------------------+ | Table | Create Table | +--------------+-------------------------------------------------------------------------+ | study_record | CREATE TABLE `study_record` ( `id` int(11) NOT NULL AUTO_INCREMENT, `day` int(11) NOT NULL, `status` varchar(32) NOT NULL, `stu_id` int(11) DEFAULT NULL, PRIMARY KEY (`id`), KEY `stu_id` (`stu_id`), CONSTRAINT `study_record_ibfk_1` FOREIGN KEY (`stu_id`) REFERENCES `student` (`id`) ) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci | +--------------+------------------------------------------------------------------------+ 1 row in set (0.00 sec) mysql> select * from study_record; +----+-----+--------+--------+ | id | day | status | stu_id | +----+-----+--------+--------+ | 2 | 1 | Yes | 1 | | 3 | 2 | NO | 1 | | 4 | 3 | Yes | 1 | | 5 | 1 | NO | 2 | | 6 | 1 | NO | 2 | +----+-----+--------+--------+ 5 rows in set (0.00 sec) mysql> select * from student; +----+------+---------------+ | id | name | register_date | +----+------+---------------+ | 1 | Alex | 2019-01-09 | | 2 | Jack | 2019-01-09 | | 3 | Rain | 2019-01-10 | | 4 | Eric | 2019-01-11 | | 5 | John | 2019-01-12 | +----+------+---------------+ 5 rows in set (0.00 sec) mysql>