【Python数据库】MongoDB

文章目录

• • @[toc]
  • • 数据插入
    • 数据查询
    • 数据更新
    • 数据删除

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系列专栏：Python数据库

学习指南：Python学习指南

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数据插入

from pymongo import MongoClient


def insert_data():
    mongo_client = MongoClient(host='localhost', port=27017)
    collection = mongo_client['python_database']['book_info']

    try:
        collection.insert_many([{'id': 1, 'name': '射雕英雄传', 'pub_date': '1980-5-1', 'read_count': 12,
                                 'comment_count': 34, 'is_delete': 0},
                                {'id': 2, 'name': '天龙八部', 'pub_date': '1986-7-24', 'read_count': 36,
                                 'comment_count': 40, 'is_delete': 0},
                                {'id': 3, 'name': '笑傲江湖', 'pub_date': '1995-12-24', 'read_count': 20,
                                 'comment_count': 80, 'is_delete': 0},
                                {'id': 4, 'name': '雪山飞狐', 'pub_date': '1987-11-11', 'read_count': 58,
                                 'comment_count': 24, 'is_delete': 0}])
    except Exception as e:
        print(f'数据插入失败: {e}')
    else:
        print('数据插入成功...')


if __name__ == '__main__':
    insert_data()
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• mongo_client = MongoClient(host='localhost', port=27017)用于连接数据库

  • host用于指定数据库IP地址，localhost表示本地
  • port用于指定数据库端口

• collection = mongo_client['python_database']['book_info']用于指定数据库和数据集合

  • 'python_database'是指定的数据库
  • 'book_info'是指定的数据集合

• collection.insert_many()用于插入多条数据

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数据查询

from pymongo import MongoClient


def query_data():
    mongo_client = MongoClient(host='localhost', port=27017)
    collection = mongo_client['python_database']['book_info']

    result = collection.find_one({'name': '射雕英雄传'})
    if result:
        print(result)
    else:
        print('数据不存在...')


if __name__ == '__main__':
    query_data()
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数据更新

from pymongo import MongoClient


def update_data():
    mongo_client = MongoClient(host='localhost', port=27017)
    collection = mongo_client['python_database']['book_info']

    collection.update_one({'name': '射雕英雄传'}, {'$set': {'is_delete': 1}})

    result = collection.find_one({'name': '射雕英雄传'})
    if result:
        print(result)
    else:
        print('数据不存在...')


if __name__ == '__main__':
    update_data()
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数据删除

from pymongo import MongoClient


def delete_data():
    mongo_client = MongoClient(host='localhost', port=27017)
    collection = mongo_client['python_database']['book_info']

    collection.delete_one({'name': '射雕英雄传'})

    result = collection.find()
    if result:
        for item in result:
            print(item)
    else:
        print('数据不存在...')


if __name__ == '__main__':
    delete_data()
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