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[Gary] Editing due to minor disconnects of a newbie - might as well make improvements before I'm too tainted by familiarity. Any suggestions for a GFM previewer?

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Gary Murakami 2012-04-02 17:25:01 -04:00
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@ -9,8 +9,11 @@ As always, the [latest source for the Ruby driver](http://github.com/mongodb/mon
## Installation
The mongo-ruby-driver gem is served through Rubygems.org. To install, make sure you have the latest version of rubygems.
gem update --system
Next, install the mongo rubygem:
gem install mongo
The required `bson` gem will be installed automatically.
@ -32,27 +35,33 @@ All of the code here assumes that you have already executed the following Ruby c
#### Making a Connection
An `Mongo::Connection` instance represents a connection to MongoDB. You use a Connection instance to obtain an Mongo:DB instance, which represents a named database. The database doesn't have to exist - if it doesn't, MongoDB will create it for you.
An `Mongo::Connection` instance represents a connection to MongoDB. You can optionally specify the MongoDB server address and port when connecting. The following example shows three ways to connect to the local machine:
You can optionally specify the MongoDB server address and port when connecting. The following example shows three ways to connect to the database "mydb" on the local machine:
db = Mongo::Connection.new.db("mydb")
db = Mongo::Connection.new("localhost").db("mydb")
db = Mongo::Connection.new("localhost", 27017).db("mydb")
At this point, the `db` object will be a connection to a MongoDB server for the specified database. Each DB instance uses a separate socket connection to the server.
If you're trying to connect to a replica set, see [Replica Sets in Ruby](http://www.mongodb.org/display/DOCS/Replica+Sets+in+Ruby).
connection = Mongo::Connection.new # (optional host/port args)
connection = Mongo::Connection.new("localhost")
connection = Mongo::Connection.new("localhost", 27017)
#### Listing All Databases
connection = Mongo::Connection.new # (optional host/port args)
connection.database_names.each { |name| puts name }
connection.database_info.each { |info| puts info.inspect}
#### Dropping a Database
connection.drop_database('database_name')
#### Using a Database
You use a Connection instance to obtain an Mongo:DB instance, which represents a named database. The database doesn't have to exist - if it doesn't, MongoDB will create it for you. The following examples use the database "mydb":
db = connection.db("mydb")
db = Mongo::Connection.new.db("mydb")
At this point, the `db` object will be a connection to a MongoDB server for the specified database. Each DB instance uses a separate socket connection to the server.
If you're trying to connect to a replica set, see [Replica Sets in Ruby](http://www.mongodb.org/display/DOCS/Replica+Sets+in+Ruby).
#### Authentication
MongoDB can be run in a secure mode where access to databases is controlled through name and password authentication. When run in this mode, any client application must provide a name and password before doing any operations. In the Ruby driver, you simply do the following with the connected mongo object:
auth = db.authenticate(my_user_name, my_password)
@ -75,8 +84,11 @@ as the output.
#### Getting a Collection
You can get a collection to use using the `collection` method:
coll = db.collection("testCollection")
This is aliased to the \[\] method:
coll = db["testCollection"]
Once you have this collection object, you can now do things like insert data, query for data, etc.