class BSON::DbPointer

Injects behaviour for encoding and decoding DBPointer values to and from raw bytes as specified by the BSON spec.

@see bsonspec.org/#/specification

Constants

BSON_TYPE

A DBPointer is type 0x0C in the BSON spec.

Attributes

id[R]

Return the DbPointer’s id.

@return [ BSON::ObjectId ] The id of the DbPointer instance

ref[R]

Return the collection name.

@return [ String ] The database collection name.

Public Class Methods

from_bson(buffer, **options) click to toggle source

Deserialize a DBPointer from BSON.

@param [ ByteBuffer ] buffer The byte buffer. @param [ Hash ] options

@option options [ nil | :bson ] :mode Decoding mode to use.

@return [ BSON::DbPointer ] The decoded DBPointer.

@see bsonspec.org/#/specification

# File lib/bson/db_pointer.rb, line 97
def self.from_bson(buffer, **options)
  ref = buffer.get_string
  id = if options.empty?
    ObjectId.from_bson(buffer)
  else
    ObjectId.from_bson(buffer, **options)
  end
  new(ref, id)
end
new(ref, id) click to toggle source

Create a new DBPointer object.

@param [ String ] ref The database collection name. @param [ BSON::ObjectId ] id The DBPointer id.

# File lib/bson/db_pointer.rb, line 33
def initialize(ref, id)
  @ref = ref
  @id = id
end

Public Instance Methods

==(other) click to toggle source

Determine if this DBPointer object is equal to another object.

@param [ Object ] other The object to compare against.

@return [ true | false ] If the objects are equal

# File lib/bson/db_pointer.rb, line 53
def ==(other)
  return false unless other.is_a?(DbPointer)
  ref == other.ref && id == other.id
end
as_extended_json(**_options) click to toggle source

Converts this object to a representation directly serializable to Extended JSON (github.com/mongodb/specifications/blob/master/source/extended-json.rst).

@return [ Hash ] The extended json representation.

# File lib/bson/db_pointer.rb, line 72
def as_extended_json(**_options)
  { '$dbPointer' => { "$ref" => ref, '$id' => id.as_extended_json } }
end
as_json(*_args) click to toggle source

Return a representation of the object for use in application-level JSON serialization. Since BSON::DbPointer is used exclusively in BSON-related contexts, this method returns the canonical Extended JSON representation.

@return [ Hash ] The extended json representation.

# File lib/bson/db_pointer.rb, line 64
def as_json(*_args)
  as_extended_json
end
to_bson(buffer = ByteBuffer.new) click to toggle source

Encode the DBPointer.

@return [ BSON::ByteBuffer ] The buffer with the encoded object.

@see bsonspec.org/#/specification

# File lib/bson/db_pointer.rb, line 81
def to_bson(buffer = ByteBuffer.new)
  buffer.put_string(ref)
  id.to_bson(buffer)
  buffer
end