Question

我正在学习如何集成Python和MongoDB，所以我给自己设置了一个挑战：创建一个小程序来注册足球运动员。

我的程序有两个模块，info_player和info_team。我将以交互方式运行程序（python -i）。第一个模块接收有关玩家和第二个模块的信息，有关团队的信息，以及一些查询和保存在数据库中。

我设计了我的数据库如下，数据库被称为“锦标赛”，集合是“团队”，文档是“玩家”。换句话说，球队和球员之间存在一对多的关系。

我的问题：我是否需要将对象转换为Json（思考to_json方法）？如何保存和查询？

info_player：

class Player:
    def __init__(self, name, age, nationality="brazilian", team):
        """
        initializating Jogador class
        """
        self.personal(name, age, country)
        self.professional(team)

    def personal(self, name, age, nationality, dominancy, height):
        """
        personal data about players
        """
        self.name = name
        self.age = age
        self.nationality = nationality
        self.height = height
        self.dominancy = dominancy  # righty, lefty or ambidextrous

    def profissional(self, position, number, team, primary):
        """ 
        professional data about players
        """
        self.position = position
        self.number = number
        self.team = team
        self.primary = False  # is he a regular member of a team?

    def to_Json():
        pass

info_team：

from pymongo import MongoClient
from info_player import Player


class TeamDB:
    def __init___(self, nome, fundacao, federacao):
        self.name = name
        self.foundationData = foundationData
        self.federation = federation

    def initializeDB():
        client = MongoClient('localhost', 27017)
        global base
        base = client.league

    def toMongo():
        """
        receive a player object and save it 
        """
    def playersByPosition():
        """
        query players by position
        """
    def lineup():
        """
        receive a team and return its starting line-up, players with primary = true
        """

Answer 1

我是否需要将对象转换为Json（想到to_json方法）？

不，你不必。在您保存文档的问题的上下文中，您可以调用.save()这是因为底层MongoEngine将对象转换为BSON，因此您不必显式编写方法将其转换为JSON。 / p>

如果您想了解如何将MongoEngine对象转换为JSON，请参阅MongoEngine: Converting mongoengine objects to JSON #1 。

如何保存和查询？

请参阅插入示例MongoEngine Tutorial: Adding to our tumblelog：

p1 = Player(name='Caio', age=20)
p1.save()

或查询：Retrieving Type Specific Information。

通过Mongoengine集成Python和MongoDB

1 个答案: