Module: RestDelete

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

Instance Method Summary collapse

Instance Method Details

#delete_class(o_class) ⇒ Object

Deletes the specified class and returns true on success

The class-entries in ActiveOrient.database_classes and ORD.database_classes are removed. The Ruby-Class itself is untouched. However, any furter operation leads to an Error.

todo: remove all instances of the class



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# File 'lib/rest/delete.rb', line 46

def delete_class o_class
	cl = classname(o_class).to_s
	return if cl.nil?
	logger.progname = 'RestDelete#DeleteClass'

	begin
		## to do: if cl contains special characters, enclose with backticks
		response = nil
		ActiveOrient.db_pool.checkout do | conn |
			response = conn["/class/#{ActiveOrient.database}/#{cl}"].delete
		end
		if response.code == 204
			logger.info{"Class #{cl} deleted."}

			ActiveOrient.database_classes.delete(cl)
		end
	rescue RestClient::InternalServerError => e
		sentence=  JSON.parse( e.response)['errors'].last['content']
		if ActiveOrient.database_classes.has_key? cl
			logger.error{"Class #{cl} still present."}
			logger.error{ sentence }
			false
		else
			logger.error{e.inspect}
			true
		end
	rescue Exception => e
		logger.error{e.message}
		logger.error{e.inspect}
	end
end

#delete_database(database:) ⇒ Object

Deletes the database and returns true on success

After the removal of the database, the working-database might be empty



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# File 'lib/rest/delete.rb', line 10

def delete_database database:
  logger.progname = 'RestDelete#DeleteDatabase'
  old_ds = ActiveOrient.database
  change_database database
  begin
  response = nil
	ActiveOrient.db_pool.checkout do | conn |
		response = conn["/database/#{ActiveOrient.database}"].delete
	end
	  if database == old_ds
	    change_database  'temp'
	    logger.info{"Working database deleted, switched to temp"}
	  else
	    change_database old_ds
	    logger.info{"Database #{database} deleted, working database is still #{ActiveOrient.database}"}
	  end
  rescue RestClient::InternalServerError => e
    change_database old_ds
	  logger.info{"Database #{database} NOT deleted, working database is still #{ActiveOrient.database}"}
  end
  !response.nil? && response.code == 204 ? true : false
end

#delete_property(o_class, field) ⇒ Object

PROPERTY #############



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# File 'lib/rest/delete.rb', line 137

def delete_property o_class, field
  logger.progname = 'RestDelete#DeleteProperty'
  begin
	response = ActiveOrient.db_pool.checkout do | conn |
		r =  conn["/property/#{ActiveOrient.database}/#{classname(o_class)}/#{field}"].delete
		true if r.code == 204
	end
  rescue RestClient::InternalServerError => e
	  logger.error{"Property #{field} in  class #{classname(o_class)} NOT deleted" }
	    false
  end
end

#delete_record(*o) ⇒ Object Also known as: delete_document

Deletes a single Record when providing a single rid-link (#00:00) or a record

Deletes multible Records when providing a list of rid-links or a record

Todo: implement delete_edges after querying the database in one statement

Example:

V.create_class :test record = Test.new something: ‘something’ V.db.delete_record record

records= (1..100).map{|x| Test.create something: x } V.db.delete_record *records

delete_records provides the removal of datasets after quering the database.



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# File 'lib/rest/delete.rb', line 98

def delete_record *o
   logger.progname = "ActiveOrient::RestDelete#DeleteRecord"
	#o.map( &:to_orient ).map do |r|
	o.orient_flatten.map do |r|
		rr =  r.to_human
		begin
			ActiveOrient::Base.remove_rid r 
#				rest_resource["/document/#{ActiveOrient.database}/#{r[1..-1].to_or}"].delete
			ActiveOrient.db_pool.checkout do | conn |
				conn["/document/#{ActiveOrient.database}/#{r.rid}"].delete
			end

		rescue RestClient::InternalServerError => e
			logger.error{"Record #{rr} NOT deleted"}
		rescue RestClient::ResourceNotFound
			logger.error{"Record #{rr} does not exist in the database"}
		rescue RestClient::BadRequest => e
			logger.error{"tried to delete  #{rr}, but something went wrong"}
			raise
		else
			logger.info{"Record #{rr} deleted"}
		end
	end
end

#delete_records(o_class, where: {}) ⇒ Object Also known as: delete_documents

Deletes records. They are defined by a query. All records which match the attributes are deleted.

An Array with freed index-values is returned



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# File 'lib/rest/delete.rb', line 129

def delete_records o_class, where: {}
  logger.progname = 'RestDelete#DeleteRecords'
  get_records(from: o_class, where: where).each{|y| delete_record  y}
end