如何在flask中使用多個Mongodb

Question

我有兩個 mysql 數據庫，一個是本地主機，另一個現在在服務器中，我將使用 Flask 在 python 中為該應用程序創建簡單的應用程序，我想連接兩個 mysql 數據庫（本地和服務器）。

任何人請建議如何將多個數據庫連接到燒瓶中。

app = Flask(__name__)
client = MongoClient()
client = MongoClient('localhost', 27017)
db = client.sampleDB1

如果可能，示例代碼。

謝謝

Answer 1

我也遇到了同樣的問題，終於弄明白了。

而不是使用

client = MongoClient()
client = MongoClient('localhost', 27017)
db = client.sampleDB1

刪除所有這些並嘗試以下操作：

mongo1 = PyMongo(app, uri = 'mongodb://localhost:27017/Database1')
mongo2 = PyMongo(app, uri = 'mongodb://localhost:27017/Database2')

然后，當你想調用一個特定的數據庫時，你可以使用：

@app.route('/routenamedb1', methods=['GET'])
def get_data_from_Database1():

Database1 = mongo1.db.CollectionName ##Notice I use mongo1,
#If I wanted to access database2 I would use mongo2

#Walk through the Database for DC to
for s in Database1.find():
#Modifying code
return data

Answer 2

#This technique can be used to connect to multiple databases or database servers:
app = Flask(__name__)

# connect to MongoDB with the defaults
mongo1 = PyMongo(app)

# connect to another MongoDB database on the same host
app.config['MONGO2_DBNAME'] = 'dbname_two'
mongo2 = PyMongo(app, config_prefix='MONGO2')

# connect to another MongoDB server altogether
app.config['MONGO3_HOST'] = 'another.host.example.com'
app.config['MONGO3_PORT'] = 27017
app.config['MONGO3_DBNAME'] = 'dbname_three'
mongo3 = PyMongo(app, config_prefix='MONGO3')

Answer 3

創建 model.py 並在其中創建 2 個數據庫的單獨實例，然后在 app.py 中：

app = Flask(__name__)
app.config['MODEL'] = model.my1st_database()
app.config['MODEL2'] = model.my2nd_database()

對我有用:)