fix(headers): enhance relation name resolution logic

* Allow resolution for both regular headers and X-Files.
* Introduce join-key-aware resolution for disambiguation.
* Add new function to handle multiple fields pointing to the same type.

pkg/common/sql_helpers.go

@@ -168,16 +168,17 @@ func SanitizeWhereClause(where string, tableName string, options ...*RequestOpti
 	}
 
 	// Build a set of allowed table prefixes (main table + preloaded relations)
+	// Keys are stored lowercase for case-insensitive matching
 	allowedPrefixes := make(map[string]bool)
 	if tableName != "" {
-		allowedPrefixes[tableName] = true
+		allowedPrefixes[strings.ToLower(tableName)] = true
 	}
 
 	// Add preload relation names as allowed prefixes
 	if len(options) > 0 && options[0] != nil {
 		for pi := range options[0].Preload {
 			if options[0].Preload[pi].Relation != "" {
-				allowedPrefixes[options[0].Preload[pi].Relation] = true
+				allowedPrefixes[strings.ToLower(options[0].Preload[pi].Relation)] = true
 				logger.Debug("Added preload relation '%s' as allowed table prefix", options[0].Preload[pi].Relation)
 			}
 		}
@@ -185,7 +186,7 @@ func SanitizeWhereClause(where string, tableName string, options ...*RequestOpti
 		// Add join aliases as allowed prefixes
 		for _, alias := range options[0].JoinAliases {
 			if alias != "" {
-				allowedPrefixes[alias] = true
+				allowedPrefixes[strings.ToLower(alias)] = true
 				logger.Debug("Added join alias '%s' as allowed table prefix", alias)
 			}
 		}
@@ -217,8 +218,8 @@ func SanitizeWhereClause(where string, tableName string, options ...*RequestOpti
 			currentPrefix, columnName := extractTableAndColumn(condToCheck)
 
 			if currentPrefix != "" && columnName != "" {
-				// Check if the prefix is allowed (main table or preload relation)
-				if !allowedPrefixes[currentPrefix] {
+				// Check if the prefix is allowed (main table or preload relation) - case-insensitive
+				if !allowedPrefixes[strings.ToLower(currentPrefix)] {
 					// Prefix is not in the allowed list - only fix if it's a valid column in the main table
 					if validColumns == nil || isValidColumn(columnName, validColumns) {
 						// Replace the incorrect prefix with the correct main table name

pkg/restheadspec/headers.go

@@ -274,9 +274,11 @@ func (h *Handler) parseOptionsFromHeaders(r common.Request, model interface{}) E
 		}
 	}
 
-	// Resolve relation names (convert table names to field names) if model is provided
-	// Skip resolution if X-Files header was provided, as XFiles uses Prefix which already contains the correct field names
-	if model != nil && !options.XFilesPresent {
+	// Resolve relation names (convert table names/prefixes to actual model field names) if model is provided.
+	// This runs for both regular headers and X-Files, because XFile prefixes don't always match model
+	// field names (e.g., prefix "HUB" vs field "HUB_RID_HUB"). RelatedKey/ForeignKey are used to
+	// disambiguate when multiple fields point to the same related type.
+	if model != nil {
 		h.resolveRelationNamesInOptions(&options, model)
 	}
 
@@ -863,8 +865,21 @@ func (h *Handler) resolveRelationNamesInOptions(options *ExtendedRequestOptions,
 
 		// Resolve each part of the path
 		currentModel := model
-		for _, part := range parts {
-			resolvedPart := h.resolveRelationName(currentModel, part)
+		for partIdx, part := range parts {
+			isLast := partIdx == len(parts)-1
+			var resolvedPart string
+			if isLast {
+				// For the final part, use join-key-aware resolution to disambiguate when
+				// multiple fields point to the same type (e.g., HUB_RID_HUB vs HUB_RID_ASSIGNEDTO).
+				// RelatedKey = parent's local column linking to child; ForeignKey = local column linking to parent.
+				localKey := preload.RelatedKey
+				if localKey == "" {
+					localKey = preload.ForeignKey
+				}
+				resolvedPart = h.resolveRelationNameWithJoinKey(currentModel, part, localKey)
+			} else {
+				resolvedPart = h.resolveRelationName(currentModel, part)
+			}
 			resolvedParts = append(resolvedParts, resolvedPart)
 
 			// Try to get the model type for the next level
@@ -980,6 +995,101 @@ func (h *Handler) resolveRelationName(model interface{}, nameOrTable string) str
 	return nameOrTable
 }
 
+// resolveRelationNameWithJoinKey resolves a relation name like resolveRelationName, but when
+// multiple fields point to the same related type, uses localKey to pick the one whose bun join
+// tag starts with "join:localKey=". Falls back to resolveRelationName if no key match is found.
+func (h *Handler) resolveRelationNameWithJoinKey(model interface{}, nameOrTable string, localKey string) string {
+	if localKey == "" {
+		return h.resolveRelationName(model, nameOrTable)
+	}
+
+	modelType := reflect.TypeOf(model)
+	if modelType == nil {
+		return nameOrTable
+	}
+	if modelType.Kind() == reflect.Ptr {
+		modelType = modelType.Elem()
+	}
+	if modelType == nil || modelType.Kind() != reflect.Struct {
+		return nameOrTable
+	}
+
+	// If it's already a direct field name, return as-is (no ambiguity).
+	for i := 0; i < modelType.NumField(); i++ {
+		if modelType.Field(i).Name == nameOrTable {
+			return nameOrTable
+		}
+	}
+
+	normalizedInput := strings.ToLower(strings.ReplaceAll(nameOrTable, "_", ""))
+	localKeyLower := strings.ToLower(localKey)
+
+	// Find all fields whose related type matches nameOrTable, then pick the one
+	// whose bun join tag local key matches localKey.
+	var fallbackField string
+	for i := 0; i < modelType.NumField(); i++ {
+		field := modelType.Field(i)
+		fieldType := field.Type
+
+		var targetType reflect.Type
+		if fieldType.Kind() == reflect.Slice {
+			targetType = fieldType.Elem()
+		} else if fieldType.Kind() == reflect.Ptr {
+			targetType = fieldType.Elem()
+		}
+		if targetType != nil && targetType.Kind() == reflect.Ptr {
+			targetType = targetType.Elem()
+		}
+		if targetType == nil || targetType.Kind() != reflect.Struct {
+			continue
+		}
+
+		normalizedTypeName := strings.ToLower(targetType.Name())
+		normalizedTypeName = strings.TrimPrefix(normalizedTypeName, "modelcore")
+		normalizedTypeName = strings.TrimPrefix(normalizedTypeName, "model")
+		if normalizedTypeName != normalizedInput {
+			continue
+		}
+
+		// Type name matches; record as fallback.
+		if fallbackField == "" {
+			fallbackField = field.Name
+		}
+
+		// Check bun join tag: "join:localKey=foreignKey"
+		bunTag := field.Tag.Get("bun")
+		for _, tagPart := range strings.Split(bunTag, ",") {
+			tagPart = strings.TrimSpace(tagPart)
+			if !strings.HasPrefix(tagPart, "join:") {
+				continue
+			}
+			joinSpec := strings.TrimPrefix(tagPart, "join:")
+			// joinSpec can be "col1=col2" or "col1=col2 col3=col4" (multi-col joins)
+			joinCols := strings.Fields(joinSpec)
+			if len(joinCols) == 0 {
+				joinCols = []string{joinSpec}
+			}
+			for _, joinCol := range joinCols {
+				eqIdx := strings.Index(joinCol, "=")
+				if eqIdx < 0 {
+					continue
+				}
+				joinLocalKey := strings.ToLower(joinCol[:eqIdx])
+				if joinLocalKey == localKeyLower {
+					logger.Debug("Resolved '%s' (localKey: %s) -> field '%s'", nameOrTable, localKey, field.Name)
+					return field.Name
+				}
+			}
+		}
+	}
+
+	if fallbackField != "" {
+		logger.Debug("No join key match for '%s' (localKey: %s), using first type match: '%s'", nameOrTable, localKey, fallbackField)
+		return fallbackField
+	}
+	return h.resolveRelationName(model, nameOrTable)
+}
+
 // addXFilesPreload converts an XFiles relation into a PreloadOption
 // and recursively processes its children
 func (h *Handler) addXFilesPreload(xfile *XFiles, options *ExtendedRequestOptions, basePath string) {

pkg/security/middleware.go

@@ -456,6 +456,125 @@ func GetUserMeta(ctx context.Context) (map[string]any, bool) {
 	return meta, ok
 }
 
+// SessionCookieOptions configures the session cookie set by SetSessionCookie.
+// All fields are optional; sensible secure defaults are applied when omitted.
+type SessionCookieOptions struct {
+	// Name is the cookie name. Defaults to "session_token".
+	Name string
+	// Path is the cookie path. Defaults to "/".
+	Path string
+	// Domain restricts the cookie to a specific domain. Empty means current host.
+	Domain string
+	// Secure sets the Secure flag. Defaults to true.
+	// Set to false only in local development over HTTP.
+	Secure *bool
+	// SameSite sets the SameSite policy. Defaults to http.SameSiteLaxMode.
+	SameSite http.SameSite
+}
+
+func (o SessionCookieOptions) name() string {
+	if o.Name != "" {
+		return o.Name
+	}
+	return "session_token"
+}
+
+func (o SessionCookieOptions) path() string {
+	if o.Path != "" {
+		return o.Path
+	}
+	return "/"
+}
+
+func (o SessionCookieOptions) secure() bool {
+	if o.Secure != nil {
+		return *o.Secure
+	}
+	return true
+}
+
+func (o SessionCookieOptions) sameSite() http.SameSite {
+	if o.SameSite != 0 {
+		return o.SameSite
+	}
+	return http.SameSiteLaxMode
+}
+
+// SetSessionCookie writes the session_token cookie to the response after a successful login.
+// Call this immediately after a successful Authenticator.Login() call.
+//
+// Example:
+//
+//	resp, err := auth.Login(r.Context(), req)
+//	if err != nil { ... }
+//	security.SetSessionCookie(w, resp)
+//	json.NewEncoder(w).Encode(resp)
+func SetSessionCookie(w http.ResponseWriter, loginResp *LoginResponse, opts ...SessionCookieOptions) {
+	var o SessionCookieOptions
+	if len(opts) > 0 {
+		o = opts[0]
+	}
+
+	maxAge := 0
+	if loginResp.ExpiresIn > 0 {
+		maxAge = int(loginResp.ExpiresIn)
+	}
+
+	http.SetCookie(w, &http.Cookie{
+		Name:     o.name(),
+		Value:    loginResp.Token,
+		Path:     o.path(),
+		Domain:   o.Domain,
+		MaxAge:   maxAge,
+		HttpOnly: true,
+		Secure:   o.secure(),
+		SameSite: o.sameSite(),
+	})
+}
+
+// GetSessionCookie returns the session token value from the request cookie, or empty string if not present.
+//
+// Example:
+//
+//	token := security.GetSessionCookie(r)
+func GetSessionCookie(r *http.Request, opts ...SessionCookieOptions) string {
+	var o SessionCookieOptions
+	if len(opts) > 0 {
+		o = opts[0]
+	}
+	cookie, err := r.Cookie(o.name())
+	if err != nil {
+		return ""
+	}
+	return cookie.Value
+}
+
+// ClearSessionCookie expires the session_token cookie, effectively logging the user out on the browser side.
+// Call this after a successful Authenticator.Logout() call.
+//
+// Example:
+//
+//	err := auth.Logout(r.Context(), req)
+//	if err != nil { ... }
+//	security.ClearSessionCookie(w)
+func ClearSessionCookie(w http.ResponseWriter, opts ...SessionCookieOptions) {
+	var o SessionCookieOptions
+	if len(opts) > 0 {
+		o = opts[0]
+	}
+
+	http.SetCookie(w, &http.Cookie{
+		Name:     o.name(),
+		Value:    "",
+		Path:     o.path(),
+		Domain:   o.Domain,
+		MaxAge:   -1,
+		HttpOnly: true,
+		Secure:   o.secure(),
+		SameSite: o.sameSite(),
+	})
+}
+
 // GetModelRulesFromContext extracts ModelRules stored by NewModelAuthMiddleware
 func GetModelRulesFromContext(ctx context.Context) (modelregistry.ModelRules, bool) {
 	rules, ok := ctx.Value(ModelRulesKey).(modelregistry.ModelRules)

pkg/security/providers.go

@@ -222,9 +222,8 @@ func (a *DatabaseAuthenticator) Authenticate(r *http.Request) (*UserContext, err
 
 	if sessionToken == "" {
 		// Try cookie
-		cookie, err := r.Cookie("session_token")
-		if err == nil {
-			tokens = []string{cookie.Value}
+		if token := GetSessionCookie(r); token != "" {
+			tokens = []string{token}
 			reference = "cookie"
 		}
 	} else {