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Connecting to multiple mongodb instances from django

I use mongoengine with Django, and as part of my project, I need to connect to two instances of MongoDB while serving a single request. It works fine if I use:

connect("mdb1")
#do stuff with mdb1
...
connect("mdb2")
#do stuff with mdb2

but I wonder if this is the right thing to do.

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3 answers

Multiple database support was added in MongoEngine 0.6

Demo using register_connection.

alias_lists = ['users-books-db', 'user-db', 'book-db'] # list of aliases
dbs = ['author-book-pairs', 'users', 'books'] # list of databases
for alias, db in zip(alias_lists, dbs):
    register_connection(alias, db)

class User(Document):
    name = StringField()
    meta = {"db_alias": "user-db"}

class Book(Document):
    name = StringField()
    meta = {"db_alias": "book-db"}

class AuthorBooks(Document):
    author = ReferenceField(User)
    book = ReferenceField(Book)
    meta = {"db_alias": "users-books-db"}
+11
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@Ricardo , (, : http://mongoengine-odm.readthedocs.org/en/latest/guide/connecting.html#context-managers). User, users-db, archive-user-db

from mongoengine.context_managers import switch_db

class User(Document):
     name = StringField()

     meta = {"db_alias": "user-db"}

with switch_db(User, 'archive-user-db') as User:
     User(name="Ross").save()  # Saves the 'archive-user-db'
+2

I think s no a proper way to do this. The example of Matt turns obrigatory use an connection by Document type. If i want to use one document with many connections the example dont fits.

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