mxcli version: v0.11.0 (2026-05-21) · OS: Windows 11 · Mendix project: runtime 11.10.0 · Combo Box widget com.mendix.widget.web.combobox.Combobox installed + mxcli widget init run
Summary
A datasource-typed property on a PLUGGABLEWIDGET is accepted by mxcli check (even with -p against the project's real widget defs) and applied by mxcli exec without error, but is not persisted — mx check then reports the property as missing. Concretely, an association Combo Box (the Mendix 11 replacement for the Reference Selector) cannot be authored for a child-context reference.
Setup
Association Administration.AccountPasswordData_Account (parent AccountPasswordData, child Account). The Combo Box pluggable is installed and mxcli widget init -p <App.mpr> has been run.
Minimal repro
Apply with mxcli exec -p <App.mpr> repro.mdl, then mx check:
create or modify page Administration.MxfCombo (
Title: 'T', Layout: Atlas_Core.Atlas_Default,
Params: { $Obj: Administration.AccountPasswordData }
) {
dataview dv (DataSource: $Obj) {
pluggablewidget 'com.mendix.widget.web.combobox.Combobox' cb (
optionsSourceType: association,
attributeAssociation: Administration.AccountPasswordData_Account,
optionsSourceAssociationDataSource: Administration.Account,
optionsSourceAssociationCaptionAttribute: Administration.Account.FullName
)
}
}Expected
optionsSourceAssociationDataSource: Administration.Account is stored as the combo's options datasource and the widget validates.
Actual
mxcli check (incl. -p) → passes.mxcli exec → applies cleanly, no error.mx check → CE0642 "Property 'Entity' is required." at Combo box 'cb' — i.e. the datasource property was dropped, so the options source has no entity.
Related
optionsSourceAssociationCaptionType is rejected by check as an unknown property even with -p (it is a valid combo property that defaults to attribute), which suggests the derived widget-property surface for datasource/conditional properties is incomplete.
Impact
Child-context reference Combo Boxes (a DataView on the association's child, selecting the parent) cannot be authored — a common detail-form pattern. Parent-context combos (selecting the child) work, so the gap is specific to the datasource-typed property not being persisted.
mxcli version:
v0.11.0 (2026-05-21)· OS: Windows 11 · Mendix project: runtime 11.10.0 · Combo Box widgetcom.mendix.widget.web.combobox.Comboboxinstalled +mxcli widget initrunSummary
A
datasource-typed property on aPLUGGABLEWIDGETis accepted bymxcli check(even with-pagainst the project's real widget defs) and applied bymxcli execwithout error, but is not persisted —mx checkthen reports the property as missing. Concretely, an association Combo Box (the Mendix 11 replacement for the Reference Selector) cannot be authored for a child-context reference.Setup
Association
Administration.AccountPasswordData_Account(parentAccountPasswordData, childAccount). The Combo Box pluggable is installed andmxcli widget init -p <App.mpr>has been run.Minimal repro
Apply with
mxcli exec -p <App.mpr> repro.mdl, thenmx check:Expected
optionsSourceAssociationDataSource: Administration.Accountis stored as the combo's options datasource and the widget validates.Actual
mxcli check(incl.-p) → passes.mxcli exec→ applies cleanly, no error.mx check→CE0642 "Property 'Entity' is required." at Combo box 'cb'— i.e. the datasource property was dropped, so the options source has no entity.Related
optionsSourceAssociationCaptionTypeis rejected bycheckas an unknown property even with-p(it is a valid combo property that defaults toattribute), which suggests the derived widget-property surface fordatasource/conditional properties is incomplete.Impact
Child-context reference Combo Boxes (a DataView on the association's child, selecting the parent) cannot be authored — a common detail-form pattern. Parent-context combos (selecting the child) work, so the gap is specific to the datasource-typed property not being persisted.