How to use ThinkORM to easily implement database data migration and synchronization
Introduction: During the development process, database data migration and synchronization is a very important task. It ensures data consistency and facilitates team collaboration. In this article, we will introduce how to use ThinkORM, a simple yet powerful ORM framework, to implement database data migration and synchronization.
1. What is data migration and synchronization
Data migration refers to the process of importing a database structure and its data into another database. This is primarily used when migrating from a development environment to a production environment, or from one server to another. The purpose of data migration is to ensure data integrity and consistency.
Data synchronization refers to achieving data consistency between multiple databases. This is mainly used for collaborative development among multiple teams or data synchronization between multiple servers. The purpose of data synchronization is to maintain data consistency and minimize data conflicts.
2. Why choose ThinkORM
3. Install and configure ThinkORM
pip install thinkorm
config.py
file in the project directory, and add the following content to configure the database connection: from thinkorm import Database DB = Database({ 'default': { 'engine': 'mysql', 'host': 'localhost', 'port': 3306, 'user': 'root', 'password': 'password', 'database': 'test' } })
4. Create data migration file
thinkorm make:migration create_users_table
migrations
directory. Migration file of #xxxxxxxx_create_users_table.py.
and
down methods as follows:
def up(db): db.create_table('users', [ db.column('id', 'integer', primary_key=True), db.column('name', 'string', length=50), db.column('email', 'string', length=100), ]) def down(db): db.drop_table('users')
thinkorm migrate
will be created in the database.
thinkorm rollback
table will be deleted.
from thinkorm import Database DB = Database({ 'default': { 'engine': 'mysql', 'host': 'localhost', 'port': 3306, 'user': 'root', 'password': 'password', 'database': 'test' }, 'backup': { 'engine': 'mysql', 'host': 'localhost', 'port': 3306, 'user': 'root', 'password': 'password', 'database': 'backup_test' } })
object in the code to switch the database connection and perform the corresponding operations.
users = DB.table('users').select() # 数据同步 DB.backup.table('users').insert(users) # 数据查询 users = DB.backup.table('users').select()
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