added back relation filter reference support

forms/collection_upsert.go

@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"regexp"
 	"strconv"
+	"strings"
 
 	validation "github.com/go-ozzo/ozzo-validation/v4"
 	"github.com/pocketbase/pocketbase/core"
@@ -131,6 +132,7 @@ func (form *CollectionUpsert) Validate() error {
 			validation.Match(collectionNameRegex),
 			validation.By(form.ensureNoSystemNameChange),
 			validation.By(form.checkUniqueName),
+			validation.By(form.checkForVia),
 		),
 		// validates using the type's own validation rules + some collection's specifics
 		validation.Field(
@@ -163,6 +165,19 @@ func (form *CollectionUpsert) Validate() error {
 	)
 }
 
+func (form *CollectionUpsert) checkForVia(value any) error {
+	v, _ := value.(string)
+	if v == "" {
+		return nil
+	}
+
+	if strings.Contains(strings.ToLower(v), "_via_") {
+		return validation.NewError("validation_invalid_name", "The name of the collection cannot contain '_via_'.")
+	}
+
+	return nil
+}
+
 func (form *CollectionUpsert) checkUniqueName(value any) error {
 	v, _ := value.(string)