Hello, I started to have a look to understand if Voyage can be used to save a moose model into a Mongo db. This script saves the model, which can be retrieved, modified and saved. |importer model1 | importer := MoosePharoImporterTask new. importer importingContext: (MooseImportingContext new importClass; importMethod; importAccess; importInvocation; importInheritance; mergeClassAndMetaclass; yourself). importer candidateClass: CandidateListOperator. importer importerClass: SmalltalkImporter. importer model: MooseModel new; addFromPackagesNamed: #(#'XML-Writer-Tests'); run. model1 := importer model. model1 name: 'a persistent model'. model1 privateState flush. model1 save MooseModel selectAll. To see the MooseModel instance that you just saved. Or you can see other objects: FAMIXClass selectAll If you want to try it: 1/ Install Mongo 2/ Gofer it url: 'http://smalltalkhub.com/mc/estebanlm/Voyage/main'; package: 'ConfigurationOfVoyageMongo'; load. (ConfigurationOfVoyageMongo project version: '1.2-baseline') load: 'Mongo'. 3/ Gofer it url: 'http://smalltalkhub.com/mc/usman/MooseVoyage/main'; package: 'MooseVoyageMongo'; load. (The package contains a few necessary extension methods to tell voyage to persist moose model and famix entities). 4/ repository := VOMongoRepository host: VOMongoRepository defaultHost database: 'moosedb'. repository enableSingleton. ======================== There are some issues though: - It takes a lot of time even to store even ordinary models. - I don't know yet how to serialize MooseGroups. I'll try to resolve them in my free time. Improvements will come from the new algorithm by Esteban to automatically break circular references in complex Graphs and he'll soon integrate and release it with Voyage 2 :). I hope this improves performance issues. For further info on Voyage, you can follow this book chapter: https://ci.inria.fr/pharo-contribution/job/PharoForTheEnterprise/lastSucces… Please feel free to try/improve. regards, Usmanf