require 'delegate'
module CouchRest
class Document < Response
include CouchRest::Mixins::Attachments
# def self.inherited(subklass)
# subklass.send(:extlib_inheritable_accessor, :database)
# end
extlib_inheritable_accessor :database
attr_accessor :database
# override the CouchRest::Model-wide default_database
# This is not a thread safe operation, do not change the model
# database at runtime.
def self.use_database(db)
self.database = db
end
def id
self['_id']
end
def rev
self['_rev']
end
# returns true if the document has never been saved
def new_document?
!rev
end
# Saves the document to the db using create or update. Also runs the :save
# callbacks. Sets the <tt>_id</tt> and <tt>_rev</tt> fields based on
# CouchDB's response.
# If <tt>bulk</tt> is <tt>true</tt> (defaults to false) the document is cached for bulk save.
def save(bulk = false)
raise ArgumentError, "doc.database required for saving" unless database
result = database.save_doc self, bulk
result['ok']
end
# Deletes the document from the database. Runs the :delete callbacks.
# Removes the <tt>_id</tt> and <tt>_rev</tt> fields, preparing the
# document to be saved to a new <tt>_id</tt>.
# If <tt>bulk</tt> is <tt>true</tt> (defaults to false) the document won't
# actually be deleted from the db until bulk save.
def destroy(bulk = false)
raise ArgumentError, "doc.database required to destroy" unless database
result = database.delete_doc(self, bulk)
if result['ok']
self['_rev'] = nil
self['_id'] = nil
end
result['ok']
end
# copies the document to a new id. If the destination id currently exists, a rev must be provided.
# <tt>dest</tt> can take one of two forms if overwriting: "id_to_overwrite?rev=revision" or the actual doc
# hash with a '_rev' key
def copy(dest)
raise ArgumentError, "doc.database required to copy" unless database
result = database.copy_doc(self, dest)
result['ok']
end
# Returns the CouchDB uri for the document
def uri(append_rev = false)
return nil if new_document?
couch_uri = "http://#{database.uri}/#{CGI.escape(id)}"
if append_rev == true
couch_uri << "?rev=#{rev}"
elsif append_rev.kind_of?(Integer)
couch_uri << "?rev=#{append_rev}"
end
couch_uri
end
# Returns the document's database
def database
@database || self.class.database
end
end
end
