fix: emit correct enum value format for XPath vs expression contexts

Enum values require different serialization depending on context:
- XPath (RETRIEVE WHERE): 'Value' (quoted value name only)
- Expression (CHANGE/CREATE): Module.EnumName.Value (qualified)

Fixes #125

Author: engalar

mdl/executor/cmd_microflows_builder_actions.go

@@ -108,7 +108,7 @@ func (fb *flowBuilder) addCreateObjectAction(s *ast.CreateObjectStmt) model.ID {
 		memberChange := &microflows.MemberChange{
 			BaseElement: model.BaseElement{ID: model.ID(mpr.GenerateID())},
 			Type:        microflows.MemberChangeTypeSet,
-			Value:       fb.exprToString(change.Value),
+			Value:       fb.memberExpressionToString(change.Value, entityQN, change.Attribute),
 		}
 		fb.resolveMemberChange(memberChange, change.Attribute, entityQN)
 		action.InitialMembers = append(action.InitialMembers, memberChange)
@@ -257,7 +257,7 @@ func (fb *flowBuilder) addChangeObjectAction(s *ast.ChangeObjectStmt) model.ID {
 		memberChange := &microflows.MemberChange{
 			BaseElement: model.BaseElement{ID: model.ID(mpr.GenerateID())},
 			Type:        microflows.MemberChangeTypeSet,
-			Value:       fb.exprToString(change.Value),
+			Value:       fb.memberExpressionToString(change.Value, entityQN, change.Attribute),
 		}
 		fb.resolveMemberChange(memberChange, change.Attribute, entityQN)
 		action.Changes = append(action.Changes, memberChange)

mdl/executor/cmd_microflows_helpers.go

@@ -10,6 +10,7 @@ import (
 
 	"github.com/mendixlabs/mxcli/mdl/ast"
 	"github.com/mendixlabs/mxcli/model"
+	"github.com/mendixlabs/mxcli/sdk/domainmodel"
 	"github.com/mendixlabs/mxcli/sdk/microflows"
 )
 
@@ -184,12 +185,77 @@ func expressionToXPath(expr ast.Expression) string {
 			return "empty"
 		}
 		return expressionToString(expr)
+	case *ast.QualifiedNameExpr:
+		return qualifiedNameToXPath(e)
 	default:
 		// For all other expression types, the standard serialization is correct
 		return expressionToString(expr)
 	}
 }
 
+// qualifiedNameToXPath converts a QualifiedNameExpr to XPath format.
+// For enum value references (3-part: Module.EnumName.Value), XPath requires
+// just the value name in quotes: 'Value'. For 2-part names (associations,
+// entity references), returns the qualified name as-is.
+func qualifiedNameToXPath(e *ast.QualifiedNameExpr) string {
+	// 3-part names (Name contains a dot) are enum references: Module.EnumName.Value
+	if dotIdx := strings.LastIndex(e.QualifiedName.Name, "."); dotIdx >= 0 {
+		valueName := e.QualifiedName.Name[dotIdx+1:]
+		return "'" + valueName + "'"
+	}
+	return e.QualifiedName.String()
+}
+
+// memberExpressionToString converts an AST Expression to a Mendix expression string,
+// resolving enum string literals to qualified enum names when the attribute type is known.
+// For example, 'Processing' becomes MyModule.ENUM_Status.Processing when the attribute
+// is of type Enumeration(MyModule.ENUM_Status).
+func (fb *flowBuilder) memberExpressionToString(expr ast.Expression, entityQN, attrName string) string {
+	// Only transform string literals for enum attributes
+	if lit, ok := expr.(*ast.LiteralExpr); ok && lit.Kind == ast.LiteralString {
+		if enumRef := fb.lookupEnumRef(entityQN, attrName); enumRef != "" {
+			// Convert 'Value' to Module.EnumName.Value
+			return enumRef + "." + fmt.Sprintf("%v", lit.Value)
+		}
+	}
+	return fb.exprToString(expr)
+}
+
+// lookupEnumRef returns the enumeration qualified name (e.g., "MyModule.ENUM_Status")
+// for an attribute if it is an enumeration type. Returns "" if the attribute is not
+// an enumeration or if the domain model is not available.
+func (fb *flowBuilder) lookupEnumRef(entityQN, attrName string) string {
+	if fb.reader == nil || entityQN == "" || attrName == "" {
+		return ""
+	}
+	parts := strings.SplitN(entityQN, ".", 2)
+	if len(parts) != 2 {
+		return ""
+	}
+	mod, err := fb.reader.GetModuleByName(parts[0])
+	if err != nil || mod == nil {
+		return ""
+	}
+	dm, err := fb.reader.GetDomainModel(mod.ID)
+	if err != nil || dm == nil {
+		return ""
+	}
+	for _, entity := range dm.Entities {
+		if entity.Name == parts[1] {
+			for _, attr := range entity.Attributes {
+				if attr.Name == attrName {
+					if enumType, ok := attr.Type.(*domainmodel.EnumerationAttributeType); ok {
+						return enumType.EnumerationRef
+					}
+					return ""
+				}
+			}
+			return ""
+		}
+	}
+	return ""
+}
+
 // xpathPathExprToString serializes an XPathPathExpr to an XPath path string.
 func xpathPathExprToString(path *ast.XPathPathExpr) string {
 	var parts []string

mdl/executor/cmd_microflows_helpers_test.go

@@ -0,0 +1,75 @@
+// SPDX-License-Identifier: Apache-2.0
+
+package executor
+
+import (
+	"testing"
+
+	"github.com/mendixlabs/mxcli/mdl/ast"
+)
+
+func TestQualifiedNameToXPath_EnumValue(t *testing.T) {
+	// 3-part names (Module.EnumName.Value) should emit just the value in quotes
+	expr := &ast.QualifiedNameExpr{
+		QualifiedName: ast.QualifiedName{Module: "MyModule", Name: "ENUM_Status.Processing"},
+	}
+	got := qualifiedNameToXPath(expr)
+	want := "'Processing'"
+	if got != want {
+		t.Errorf("qualifiedNameToXPath(%q) = %q, want %q", expr.QualifiedName.String(), got, want)
+	}
+}
+
+func TestQualifiedNameToXPath_NonEnum(t *testing.T) {
+	// 2-part names (Module.AssocName) should pass through as-is
+	expr := &ast.QualifiedNameExpr{
+		QualifiedName: ast.QualifiedName{Module: "MyModule", Name: "SomeAssoc"},
+	}
+	got := qualifiedNameToXPath(expr)
+	want := "MyModule.SomeAssoc"
+	if got != want {
+		t.Errorf("qualifiedNameToXPath(%q) = %q, want %q", expr.QualifiedName.String(), got, want)
+	}
+}
+
+func TestExpressionToXPath_EnumInComparison(t *testing.T) {
+	// WHERE Status = Module.ENUM.Value should produce: Status = 'Value'
+	expr := &ast.BinaryExpr{
+		Left:     &ast.IdentifierExpr{Name: "Status"},
+		Operator: "=",
+		Right: &ast.QualifiedNameExpr{
+			QualifiedName: ast.QualifiedName{Module: "BST", Name: "ComplianceStatus.Rectified"},
+		},
+	}
+	got := expressionToXPath(expr)
+	want := "Status = 'Rectified'"
+	if got != want {
+		t.Errorf("expressionToXPath = %q, want %q", got, want)
+	}
+}
+
+func TestExpressionToXPath_StringLiteralPreserved(t *testing.T) {
+	// WHERE Status = 'Pending' should stay as Status = 'Pending'
+	expr := &ast.BinaryExpr{
+		Left:     &ast.IdentifierExpr{Name: "Status"},
+		Operator: "=",
+		Right:    &ast.LiteralExpr{Value: "Pending", Kind: ast.LiteralString},
+	}
+	got := expressionToXPath(expr)
+	want := "Status = 'Pending'"
+	if got != want {
+		t.Errorf("expressionToXPath = %q, want %q", got, want)
+	}
+}
+
+func TestExpressionToString_QualifiedNameUnchanged(t *testing.T) {
+	// In expression context, qualified names should remain as-is (correct for enum refs)
+	expr := &ast.QualifiedNameExpr{
+		QualifiedName: ast.QualifiedName{Module: "MyModule", Name: "ENUM_Status.Processing"},
+	}
+	got := expressionToString(expr)
+	want := "MyModule.ENUM_Status.Processing"
+	if got != want {
+		t.Errorf("expressionToString = %q, want %q", got, want)
+	}
+}

mdl/visitor/visitor_page_v3.go

@@ -1163,6 +1163,12 @@ func xpathExprToString(expr ast.Expression) string {
 	case *ast.IdentifierExpr:
 		return e.Name
 	case *ast.QualifiedNameExpr:
+		// For enum value references (3-part: Module.EnumName.Value), XPath requires
+		// just the value name in quotes: 'Value'.
+		if dotIdx := strings.LastIndex(e.QualifiedName.Name, "."); dotIdx >= 0 {
+			valueName := e.QualifiedName.Name[dotIdx+1:]
+			return "'" + valueName + "'"
+		}
 		return e.QualifiedName.String()
 	default:
 		return ""

mdl/visitor/visitor_xpath_test.go

@@ -343,6 +343,39 @@ func TestXPath_ComplexExpressions(t *testing.T) {
 	}
 }
 
+func TestXPath_EnumValueReference(t *testing.T) {
+	tests := []struct {
+		name  string
+		input string
+		want  string
+	}{
+		{
+			"3-part enum value becomes quoted value",
+			"[Status = BST.ComplianceStatus.Rectified]",
+			"[Status = 'Rectified']",
+		},
+		{
+			"2-part qualified name preserved",
+			"[Module.Association = $object]",
+			"[Module.Association = $object]",
+		},
+		{
+			"string literal enum preserved",
+			"[Status = 'Active']",
+			"[Status = 'Active']",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got := roundTripXPath(tt.input)
+			if got != tt.want {
+				t.Errorf("roundTripXPath(%q) = %q, want %q", tt.input, got, tt.want)
+			}
+		})
+	}
+}
+
 func TestXPath_ASTTypes(t *testing.T) {
 	t.Run("bare path creates XPathPathExpr", func(t *testing.T) {
 		expr := parseXPathConstraint("[Module.Assoc/Module.Entity/Attr = $val]")