Module: RestChange

Included in:
ActiveOrient::OrientDB
Defined in:
lib/rest/change.rb

Instance Method Summary collapse

Instance Method Details

#alter_property(o_class, property:, attribute: "DEFAULT", alteration:) ⇒ Object

Used to add restriction or other properties to the Property of a Class.

See http://orientdb.com/docs/2.1/SQL-Alter-Property.html



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# File 'lib/rest/change.rb', line 116

def alter_property o_class, property:, attribute: "DEFAULT", alteration:  # :nodoc: because untested
  logger.progname = 'RestChange#AlterProperty'
  begin
    attribute.to_s! unless attribute.is_a? String
    attribute.capitalize_first_letter
    case attribute
    when "LINKEDCLASS", "LINKEDTYPE", "NAME", "REGEX", "TYPE", "REGEX", "COLLATE", "CUSTOM"
      unless alteration.is_a? String
        logger.error{"#{alteration} should be a String."}
        return 0
      end
    when "MIN", "MAX"
      unless alteration.is_a? Integer
        logger.error{"#{alteration} should be an Integer."}
        return 0
      end
    when "MANDATORY", "NOTNULL", "READONLY"
      unless alteration.is_a? TrueClass or alteration.is_a? FalseClass
        logger.error{"#{alteration} should be an Integer."}
        return 0
      end
    when "DEFAULT"
    else
      logger.error{"Wrong attribute."}
      return 0
    end

	execute { "ALTER PROPERTY #{class_name(o_class)}.#{property} #{attribute} #{alteration}"}
  rescue Exception => e
    logger.error{e.message}
  end
end

#change_database(name) ⇒ Object

Changes the working-database to name



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# File 'lib/rest/change.rb', line 7

def change_database name
  @classes = []
  @database = name
  ActiveOrient.database = name
end

#patch_record(rid) ⇒ Object Also known as: patch_document

Lazy Updating of the given Record. internal using while updating records



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# File 'lib/rest/change.rb', line 83

def patch_record rid	    # :nodoc:   (used by #update )
   logger.progname = 'RestChange#PatchRecord'
   content = yield
	if content.is_a? Hash
		begin
			ActiveOrient.db_pool.checkout do | conn |
				conn["/document/#{ActiveOrient.database}/#{rid}"].patch content.to_orient.to_json
			end
		rescue RestClient::Conflict => e  # (409)
			# most probably the server is busy. we  wait for a second  print an Error-Message and retry
			sleep(1)
			logger.error{ "RestClient::Error(409): Server is signaling a conflict ... retrying" }
			retry
		rescue RestClient::InternalServerError => e
			sentence=  JSON.parse( e.response)['errors'].last['content']
			logger.error{sentence}
			logger.error{ e.backtrace.map {|l| "  #{l}\n"}.join  }
			logger.error{e.message.to_s}
		end
	else
		logger.error{"PATCH FAILED: The Block must provide an Hash with properties to be updated"}
	end
end

#update(record, attributes, version = 0) ⇒ Object

Convient update of the dataset by calling sql-patch

The argument record can be specified as ActiveOrient::Model-instance or as rid-string( #0:0 )

called from ModelRecord#update

if the update was successful, the updated data are returned as Hash.

First the cached object is retrieved
Its modified by the parameters provided
and then patched

better would be: update the cached object and patch that.



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# File 'lib/rest/change.rb', line 31

def update record, attributes , version=0   
  r = ActiveOrient::Model.autoload_object record.rid 
  return(false) unless r.is_a?(ActiveOrient::Model)
raise "Cannot update the record, version-information missing. please reload ! " if version.nil?
  version = r.version if version.zero?
  result = patch_record(r.rid) do
    attributes.merge({'@version' => version, '@class' => r.class.ref_name })
  end
  # returns a new instance of ActiveOrient::Model and updates any reference on rid
  # It's assumed, that the version 
  # if the patch is not successfull no string is returned and thus no record is fetched
  # JSON.parse(result) if result.is_a?(String)
  if result.is_a?(String)
     JSON.parse(result) # return value
  else
    logger.error{ "REST::Update was not successfull" }
     nil   # returnvalue
  end
end

#update_records(o_class, set: {}, where: {}, remove: nil) ⇒ Object

Example:

ORD.update_documents classname, set: {:symbol => 'TWR'}, where: {con_id: 340}

Replaces the symbol to TWR in each record where the con_id is 340

Both set and where take multiple attributes

Returns the JSON-Response.

# todo: clear the rid-cache



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# File 'lib/rest/change.rb', line 65

def update_records o_class, set:{}, where: {}, remove: nil
	logger.progname = 'RestChange#UpdateRecords'
	count =  execute do 
		if set.present?
			"UPDATE #{classname(o_class)} SET #{generate_sql_list(set)} #{compose_where(where)}"
		elsif remove.present?
			"UPDATE #{classname(o_class)} remove #{remove} #{compose_where(where)}"
		end 
	end &.first
rescue Exception => e
	logger.error{e.message}
	nil


end