Indeed, if you want the ajax support to work, you might need to change some components. Good that you could make it work. Some details that might be helpful: 1 If you have more date input fields that should use this component, the builder is your friend. Take a look at QCBootstrapComponentBuilder>>visitBooleanDescription: aDescription (aDescription componentClass = MACheckboxComponent) ifTrue: [ aDescription componentClass: TBSMagritteCheckboxComponent ]. super visitBooleanDescription: aDescription You can do the same: QCMyBootstrapComponentBuilder>>visitDateDescription: aDescription (aDescription componentClass = MADateInputComponent) ifTrue: [ aDescription componentClass: MAJQDateInputComponent ]. super visitDateDescription: aDescription and then in your QCBootstrapApplicationModel subclass override the defaultLayoutBuilder to ^QCMyBootstrapComponentBuilder. 2 The MAJQDateInputComponent is not styled to fit in with Bootstrap. There it would make sense to use an input-group-addon/btn and the glyphicon-calendar 3 Please let me know if you want to be added as committer to the QCMagritte repo. A clean way to add this would be to add a package QC-Magritte-Addons and put the extension method in method category *QC-Magritte-Addons So you can save it independently without having to change Magritte-JQuery 4 The application model only shows the fields where a relationdescription (subclass) responds true to isRoot. Override it, or depend on MARelationDescription>>defaultIsRoot self classes ifEmpty: [ ^false ]. ^self commonClass canBeRoot Stephan