YARD and more specific exceptions for DB
This commit is contained in:
Kyle Banker
parent
f2de52351a
commit
f9ec4eca1d
@ -294,6 +294,8 @@ module Mongo
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# [field name, direction] pairs. Directions should be specified as Mongo::ASCENDING or Mongo::DESCENDING.
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#
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# @param [Boolean] unique if true, this index will enforce a uniqueness constraint.
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#
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# @return [String] the name of the index created.
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def create_index(field_or_spec, unique=false)
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field_h = OrderedHash.new
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if field_or_spec.is_a?(String) || field_or_spec.is_a?(Symbol)
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296
lib/mongo/db.rb
296
lib/mongo/db.rb
@ -55,39 +55,19 @@ module Mongo
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# The logger instance if :logger is passed to initialize.
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attr_reader :logger
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# Instances of DB are normally obtained by calling Mongo#db.
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# Instances of DB are normally obtained by calling Mongo#db.
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#
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# db_name :: The database name
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# @param [String] db_name the database name.
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# @param [Mongo::Connection] connection a connection object pointing to MongoDB. Note
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# that databases are usually instantiated via the Connection class. See the examples below.
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#
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# nodes :: An array of [host, port] pairs. See Connection#new, which offers
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# a more flexible way of defining nodes.
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# @option options [Boolean] strict (False) If true, collections must exist to be accessed and must
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# not exist to be created. See DB#collection and DB#create_collection.
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#
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# options :: A hash of options.
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#
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# Options:
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#
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# :strict :: If true, collections must exist to be accessed and must
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# not exist to be created. See #collection and #create_collection.
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#
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# :pk :: A primary key factory object that must respond to :create_pk,
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# which should take a hash and return a hash which merges the
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# original hash with any primary key fields the factory wishes
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# to inject. (NOTE: if the object already has a primary key,
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# the factory should not inject a new key; this means that the
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# object is being used in a repsert but it already exists.) The
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# idea here is that when ever a record is inserted, the :pk
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# object's +create_pk+ method will be called and the new hash
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# returned will be inserted.
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#
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# :slave_ok :: Only used if +nodes+ contains only one host/port. If
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# false, when connecting to that host/port we check to
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# see if the server is the master. If it is not, an error
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# is thrown.
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#
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# :logger :: Optional Logger instance to which driver usage information
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# will be logged.
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#
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# :auto_reconnect :: DEPRECATED. See http://www.mongodb.org/display/DOCS/Replica+Pairs+in+Ruby
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# @option options [Object, #create_pk(doc)] pk (Mongo::ObjectID) A primary key factory object,
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# which should take a hash and return a hash which merges the original hash with any primary key
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# fields the factory wishes to inject. (NOTE: if the object already has a primary key,
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# the factory should not inject a new key).
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def initialize(db_name, connection, options={})
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@name = validate_db_name(db_name)
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@connection = connection
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@ -95,9 +75,13 @@ module Mongo
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@pk_factory = options[:pk]
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end
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# Returns true if +username+ has +password+ in
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# +SYSTEM_USER_COLLECTION+. +name+ is username, +password+ is
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# plaintext password.
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# Authenticates with the given username and password. Note that mongod
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# must be started with the --auth option for authentication to be enabled.
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#
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# @param [String] username
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# @param [String] password
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#
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# @return [Boolean]
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def authenticate(username, password)
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doc = command(:getnonce => 1)
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raise "error retrieving nonce: #{doc}" unless ok?(doc)
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@ -112,66 +96,84 @@ module Mongo
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end
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# Deauthorizes use for this database for this connection.
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#
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# @raise [MongoDBError] if logging out fails.
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#
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# @return [Boolean]
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def logout
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doc = command(:logout => 1)
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return true if ok?(doc)
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raise "error logging out: #{doc.inspect}"
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raise MongoDBError, "error logging out: #{doc.inspect}"
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end
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# Returns an array of collection names in this database.
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# Get an array of collection names in this database.
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#
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# @return [Array]
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def collection_names
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names = collections_info.collect { |doc| doc['name'] || '' }
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names = names.delete_if {|name| name.index(@name).nil? || name.index('$')}
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names.map {|name| name.sub(@name + '.', '')}
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end
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# Retuns an array of Collection instances, one for each collection in this
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# database.
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# Get an array of Collection instances, one for each collection in this database.
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#
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# @return [Array<Mongo::Collection>]
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def collections
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collection_names.map do |collection_name|
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Collection.new(self, collection_name)
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end
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end
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# Returns a cursor over query result hashes. Each hash contains a
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# 'name' string and optionally an 'options' hash. If +coll_name+ is
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# specified, an array of length 1 is returned.
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# Get info on system namespaces (collections). This method returns
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# a cursor which can be iterated over. For each collection, a hash
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# will be yielded containing a 'name' string and, optionally, an 'options' hash.
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#
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# @param [String] coll_name return info for the specifed collection only.
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#
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# @return [Mongo::Cursor<Hash>]
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def collections_info(coll_name=nil)
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selector = {}
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selector[:name] = full_collection_name(coll_name) if coll_name
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Cursor.new(Collection.new(self, SYSTEM_NAMESPACE_COLLECTION), :selector => selector)
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end
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# Create a collection. If +strict+ is false, will return existing or
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# Create a collection.
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#
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# new collection. If +strict+ is true, will raise an error if
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# collection +name+ already exists.
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#
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# Options is an optional hash:
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# @param [String] name the name of the new collection.
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#
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# :capped :: Boolean. If not specified, capped is +false+.
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# @option options [Boolean] :capped (False) created a capped collection.
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#
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# :size :: If +capped+ is +true+, specifies the maximum number of
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# bytes. If +false+, specifies the initial extent of the
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# collection.
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# @option options [Integer] :size (Nil) If +capped+ is +true+, specifies the maximum number of
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# bytes for the capped collection. If +false+, specifies the number of bytes allocated
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# for the initial extent of the collection.
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#
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# :max :: Max number of records in a capped collection. Optional.
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# @option options [Integer] :max (Nil) If +capped+ is +true+, indicates the maximum number of records
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# in a capped collection.
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#
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# @raise [MongoDBError] raised under two conditions: either we're in +strict+ mode and the collection
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# already exists or collection creation fails on the server.
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#
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# @return [Mongo::Collection]
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def create_collection(name, options={})
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# First check existence
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# Does the collection already exist?
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if collection_names.include?(name)
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if strict?
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raise "Collection #{name} already exists. Currently in strict mode."
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raise MongoDBError, "Collection #{name} already exists. Currently in strict mode."
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else
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return Collection.new(self, name)
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end
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end
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# Create new collection
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# Create a new collection.
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oh = OrderedHash.new
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oh[:create] = name
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doc = command(oh.merge(options || {}))
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ok = doc['ok']
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return Collection.new(self, name, @pk_factory) if ok.kind_of?(Numeric) && (ok.to_i == 1 || ok.to_i == 0)
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raise "Error creating collection: #{doc.inspect}"
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raise MongoDBError, "Error creating collection: #{doc.inspect}"
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end
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# @deprecated all the admin methods are now included in the DB class.
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@ -180,46 +182,59 @@ module Mongo
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Admin.new(self)
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end
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# Return a collection. If +strict+ is false, will return existing or
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# new collection. If +strict+ is true, will raise an error if
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# collection +name+ does not already exists.
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# Get a collection by name.
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#
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# @param [String] name the collection name.
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#
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# @raise [MongoDBError] if collection does not already exist and we're in +strict+ mode.
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def collection(name)
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return Collection.new(self, name, @pk_factory) if !strict? || collection_names.include?(name)
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raise "Collection #{name} doesn't exist. Currently in strict mode."
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raise MongoDBError, "Collection #{name} doesn't exist. Currently in strict mode."
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end
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alias_method :[], :collection
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# Drop collection +name+. Returns +true+ on success or if the
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# collection does not exist, +false+ otherwise.
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# Drop a collection by +name+.
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#
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# @param [String] name
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#
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# @return [Boolean] True on success or if the collection names doesn't exist.
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def drop_collection(name)
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return true unless collection_names.include?(name)
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ok?(command(:drop => name))
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end
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# Returns the error message from the most recently executed database
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# Get the error message from the most recently executed database
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# operation for this connection, or +nil+ if there was no error.
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#
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# @return [String, Nil]
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def error
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doc = command(:getlasterror => 1)
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raise "error retrieving last error: #{doc}" unless ok?(doc)
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raise MongoDBError, "error retrieving last error: #{doc}" unless ok?(doc)
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doc['err']
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end
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# Get status information from the last operation on this connection.
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#
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# @return [Hash] a hash representing the status of the last db op.
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def last_status
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command(:getlasterror => 1)
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end
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# Returns +true+ if an error was caused by the most recently executed
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# Return +true+ if an error was caused by the most recently executed
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# database operation.
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#
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# @return [Boolean]
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def error?
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error != nil
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end
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# Get the most recent error to have occured on this database
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# Get the most recent error to have occured on this database.
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#
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# Only returns errors that have occured since the last call to
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# This command only returns errors that have occured since the last call to
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# DB#reset_error_history - returns +nil+ if there is no such error.
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#
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# @return [String, Nil]
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def previous_error
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error = command(:getpreverror => 1)
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if error["err"]
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@ -233,28 +248,39 @@ module Mongo
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#
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# Calls to DB#previous_error will only return errors that have occurred
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# since the most recent call to this method.
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#
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# @return [Hash]
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def reset_error_history
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command(:reseterror => 1)
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end
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# @deprecated please use Collection#find to create queries.
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#
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# Returns a Cursor over the query results.
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#
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# Note that the query gets sent lazily; the cursor calls
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# #send_query_message when needed. If the caller never requests an
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# Connection#send_message when needed. If the caller never requests an
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# object from the cursor, the query never gets sent.
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def query(collection, query, admin=false)
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Cursor.new(self, collection, query, admin)
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end
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# Dereference a DBRef, getting the document it points to.
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# Dereference a DBRef, returning the document it points to.
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#
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# @param [Mongo::DBRef] dbref
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#
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# @return [Hash] the document indicated by the db reference.
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#
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# @see http://www.mongodb.org/display/DOCS/DB+Ref MongoDB DBRef spec.
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def dereference(dbref)
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collection(dbref.namespace).find_one("_id" => dbref.object_id)
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end
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# Evaluate a JavaScript expression on MongoDB.
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# +code+ should be a string or Code instance containing a JavaScript
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# expression. Additional arguments will be passed to that expression
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# when it is run on the server.
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# Evaluate a JavaScript expression in MongoDB.
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#
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# @param [String, Code] code a JavaScript expression to evaluate server-side.
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# @param [Integer, Hash] args any additional argument to be passed to the +code+ expression when
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# it's run on the server.
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def eval(code, *args)
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if not code.is_a? Code
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code = Code.new(code)
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@ -268,31 +294,46 @@ module Mongo
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raise OperationFailure, "eval failed: #{doc['errmsg']}"
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end
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# Rename collection +from+ to +to+. Meant to be called by
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# Collection#rename.
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# Rename a collection.
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#
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# @param [String] from original collection name.
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# @param [String] to new collection name.
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#
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# @return [True] returns +true+ on success.
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#
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# @raise MongoDBError if there's an error renaming the collection.
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def rename_collection(from, to)
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oh = OrderedHash.new
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oh[:renameCollection] = "#{@name}.#{from}"
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oh[:to] = "#{@name}.#{to}"
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doc = command(oh, true)
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raise "Error renaming collection: #{doc.inspect}" unless ok?(doc)
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ok?(doc) || raise(MongoDBError, "Error renaming collection: #{doc.inspect}")
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end
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# Drop index +name+ from +collection_name+. Normally called from
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# Drop an index from a given collection. Normally called from
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# Collection#drop_index or Collection#drop_indexes.
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def drop_index(collection_name, name)
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#
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# @param [String] collection_name
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# @param [String] index_name
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#
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# @return [True] returns +true+ on success.
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#
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# @raise MongoDBError if there's an error renaming the collection.
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def drop_index(collection_name, index_name)
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oh = OrderedHash.new
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oh[:deleteIndexes] = collection_name
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oh[:index] = name
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oh[:index] = index_name
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doc = command(oh)
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raise "Error with drop_index command: #{doc.inspect}" unless ok?(doc)
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ok?(doc) || raise(MongoDBError, "Error with drop_index command: #{doc.inspect}")
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end
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# Get information on the indexes for the collection +collection_name+.
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# Normally called by Collection#index_information. Returns a hash where
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# the keys are index names (as returned by Collection#create_index and
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# the values are lists of [key, direction] pairs specifying the index
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# (as passed to Collection#create_index).
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# Get information on the indexes for the given collection.
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# Normally called by Collection#index_information.
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#
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# @param [String] collection_name
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#
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# @return [Hash] keys are index names and the values are lists of [key, direction] pairs
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# defining the index.
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def index_information(collection_name)
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sel = {:ns => full_collection_name(collection_name)}
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info = {}
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@ -302,49 +343,48 @@ module Mongo
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info
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end
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# Create a new index on +collection_name+. +field_or_spec+
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# should be either a single field name or a Array of [field name,
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# direction] pairs. Directions should be specified as
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# Mongo::ASCENDING or Mongo::DESCENDING. Normally called
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# by Collection#create_index. If +unique+ is true the index will
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# enforce a uniqueness constraint.
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# Create a new index on the given collection.
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# Normally called by Collection#create_index.
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#
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# @param [String] collection_name
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# @param [String, Array] field_or_spec either either a single field name
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# or an array of [field name, direction] pairs. Directions should be specified as
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# Mongo::ASCENDING or Mongo::DESCENDING.
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# @param [Boolean] unique if +true+, the created index will enforce a uniqueness constraint.
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#
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# @return [String] the name of the index created.
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def create_index(collection_name, field_or_spec, unique=false)
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self.collection(collection_name).create_index(field_or_spec, unique)
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end
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# Return +true+ if +doc+ contains an 'ok' field with the value 1.
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# Return +true+ if the supplied +doc+ contains an 'ok' field with the value 1.
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#
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# @param [Hash] doc
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#
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# @return [Boolean]
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def ok?(doc)
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ok = doc['ok']
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ok.kind_of?(Numeric) && ok.to_i == 1
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end
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# DB commands need to be ordered, so selector must be an OrderedHash
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# (or a Hash with only one element). What DB commands really need is
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# that the "command" key be first.
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def command(selector, use_admin_db=false, sock=nil)
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if !selector.kind_of?(OrderedHash)
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if !selector.kind_of?(Hash) || selector.keys.length > 1
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raise "command must be given an OrderedHash when there is more than one key"
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end
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end
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cursor = Cursor.new(Collection.new(self, SYSTEM_COMMAND_COLLECTION), :admin => use_admin_db, :limit => -1, :selector => selector, :socket => sock)
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cursor.next_document
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end
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# Sends a command to the database.
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#
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# :selector (required) :: An OrderedHash, or a standard Hash with just one
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# key, specifying the command to be performed.
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#
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# :admin (optional) :: If true, the command will be executed on the admin
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# collection.
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#
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# :check_response (optional) :: If true, will raise an exception if the
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# command fails.
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# Send a command to the database. Note that a command has a formal definition in MongoDB: it's
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# a kind of overloaded query.
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#
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# Note: DB commands must start with the "command" key. For this reason,
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# any selector containing more than one key must be an OrderedHash.
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#
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# @param [OrderedHash, Hash] selector an OrderedHash, or a standard Hash with just one
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# key, specifying the command to be performed.
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#
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# @param [Boolean] admin If +true+, the command will be executed on the admin
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# collection.
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#
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# @param [Boolean] check_response If +true+, will raise an exception if the
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# command fails.
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#
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# @param [Socket] sock a socket to use. This is mainly for internal use.
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#
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# @return [Hash]
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def command(selector, admin=false, check_response=false, sock=nil)
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raise MongoArgumentError, "command must be given a selector" unless selector.is_a?(Hash) && !selector.empty?
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if selector.class.eql?(Hash) && selector.keys.length > 1
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@ -367,11 +407,18 @@ module Mongo
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command(args[0], args[1])
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end
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# A shortcut returning db plus dot plus collection name.
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#
|
||||
# @param [String] collection_name
|
||||
#
|
||||
# @return [String]
|
||||
def full_collection_name(collection_name)
|
||||
"#{@name}.#{collection_name}"
|
||||
end
|
||||
|
||||
# The primary key factory object (or +nil+).
|
||||
#
|
||||
# @return [Object, Nil]
|
||||
def pk_factory
|
||||
@pk_factory
|
||||
end
|
||||
@ -407,7 +454,9 @@ module Mongo
|
||||
end
|
||||
end
|
||||
|
||||
# Set database profiling level to :off, :slow_only, or :all.
|
||||
# Set this database's profiling level.
|
||||
#
|
||||
# @param [Symbol] level acceptable options are +:off+, +:slow_only+, or +:all+.
|
||||
def profiling_level=(level)
|
||||
oh = OrderedHash.new
|
||||
oh[:profile] = case level
|
||||
@ -421,23 +470,30 @@ module Mongo
|
||||
raise "Error: illegal profiling level value #{level}"
|
||||
end
|
||||
doc = command(oh)
|
||||
raise "Error with profile command: #{doc.inspect}" unless ok?(doc)
|
||||
ok?(doc) || raise(MongoDBError, "Error with profile command: #{doc.inspect}")
|
||||
end
|
||||
|
||||
# Returns an array containing current profiling information.
|
||||
# Get the current profiling information.
|
||||
#
|
||||
# @return [Array] a list of documents containing profiling information.
|
||||
def profiling_info
|
||||
Cursor.new(Collection.new(self, DB::SYSTEM_PROFILE_COLLECTION), :selector => {}).to_a
|
||||
end
|
||||
|
||||
# Validate a named collection by raising an exception if there is a
|
||||
# problem or returning an interesting hash (see especially the
|
||||
# 'result' string value) if all is well.
|
||||
# Validate a named collection.
|
||||
#
|
||||
# @param [String] name the collection name.
|
||||
#
|
||||
# @return [Hash] validation information.
|
||||
#
|
||||
# @raise [MongoDBError] if the command fails or there's a problem with the validation
|
||||
# data, or if the collection is invalid.
|
||||
def validate_collection(name)
|
||||
doc = command(:validate => name)
|
||||
raise "Error with validate command: #{doc.inspect}" unless ok?(doc)
|
||||
raise MongoDBError, "Error with validate command: #{doc.inspect}" unless ok?(doc)
|
||||
result = doc['result']
|
||||
raise "Error with validation data: #{doc.inspect}" unless result.kind_of?(String)
|
||||
raise "Error: invalid collection #{name}: #{doc.inspect}" if result =~ /\b(exception|corrupt)\b/i
|
||||
raise MongoDBError, "Error with validation data: #{doc.inspect}" unless result.kind_of?(String)
|
||||
raise MongoDBError, "Error: invalid collection #{name}: #{doc.inspect}" if result =~ /\b(exception|corrupt)\b/i
|
||||
doc
|
||||
end
|
||||
|
||||
|
||||
@ -419,6 +419,7 @@ class DBAPITest < Test::Unit::TestCase
|
||||
@@db.collection('does-not-exist')
|
||||
fail "expected exception"
|
||||
rescue => ex
|
||||
assert_equal MongoDBError, ex.class
|
||||
assert_equal "Collection does-not-exist doesn't exist. Currently in strict mode.", ex.to_s
|
||||
ensure
|
||||
@@db.strict = false
|
||||
@ -438,15 +439,11 @@ class DBAPITest < Test::Unit::TestCase
|
||||
end
|
||||
|
||||
# Now the collection exists. This time we should see an exception.
|
||||
begin
|
||||
assert_raise MongoDBError do
|
||||
@@db.create_collection('foobar')
|
||||
fail "expected exception"
|
||||
rescue => ex
|
||||
assert_equal "Collection foobar already exists. Currently in strict mode.", ex.to_s
|
||||
ensure
|
||||
@@db.strict = false
|
||||
@@db.drop_collection('foobar')
|
||||
end
|
||||
@@db.strict = false
|
||||
@@db.drop_collection('foobar')
|
||||
|
||||
# Now we're not in strict mode - should succeed
|
||||
@@db.create_collection('foobar')
|
||||
|
||||
@ -48,6 +48,49 @@ class DBTest < Test::Unit::TestCase
|
||||
@db.command(command, true, true)
|
||||
end
|
||||
end
|
||||
|
||||
should "raise an error if logging out fails" do
|
||||
@db.expects(:command).returns({})
|
||||
assert_raise MongoDBError do
|
||||
@db.logout
|
||||
end
|
||||
end
|
||||
|
||||
should "raise an error if collection creation fails" do
|
||||
@db.expects(:collection_names).returns([])
|
||||
@db.expects(:command).returns({})
|
||||
assert_raise MongoDBError do
|
||||
@db.create_collection("foo")
|
||||
end
|
||||
end
|
||||
|
||||
should "raise an error if getlasterror fails" do
|
||||
@db.expects(:command).returns({})
|
||||
assert_raise MongoDBError do
|
||||
@db.error
|
||||
end
|
||||
end
|
||||
|
||||
should "raise an error if rename fails" do
|
||||
@db.expects(:command).returns({})
|
||||
assert_raise MongoDBError do
|
||||
@db.rename_collection("foo", "bar")
|
||||
end
|
||||
end
|
||||
|
||||
should "raise an error if drop_index fails" do
|
||||
@db.expects(:command).returns({})
|
||||
assert_raise MongoDBError do
|
||||
@db.drop_index("foo", "bar")
|
||||
end
|
||||
end
|
||||
|
||||
should "raise an error if set_profiling_level fails" do
|
||||
@db.expects(:command).returns({})
|
||||
assert_raise MongoDBError do
|
||||
@db.profiling_level = :slow_only
|
||||
end
|
||||
end
|
||||
end
|
||||
end
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user