added back relation filter reference support

models/schema/schema_field.go

@@ -5,6 +5,7 @@ import (
 	"errors"
 	"regexp"
 	"strconv"
+	"strings"
 
 	validation "github.com/go-ozzo/ozzo-validation/v4"
 	"github.com/go-ozzo/ozzo-validation/v4/is"
@@ -211,6 +212,7 @@ func (f SchemaField) Validate() error {
 			validation.Length(1, 255),
 			validation.Match(schemaFieldNameRegex),
 			validation.NotIn(list.ToInterfaceSlice(excludeNames)...),
+			validation.By(f.checkForVia),
 		),
 		validation.Field(&f.Type, validation.Required, validation.In(list.ToInterfaceSlice(FieldTypes())...)),
 		// currently file fields cannot be unique because a proper
@@ -228,6 +230,20 @@ func (f *SchemaField) checkOptions(value any) error {
 	return v.Validate()
 }
 
+// @todo merge with the collections during the refactoring
+func (f *SchemaField) 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 field cannot contain '_via_'.")
+	}
+
+	return nil
+}
+
 // InitOptions initializes the current field options based on its type.
 //
 // Returns error on unknown field type.

models/schema/schema_field_test.go

@@ -298,6 +298,15 @@ func TestSchemaFieldValidate(t *testing.T) {
 			},
 			[]string{"name"},
 		},
+		{
+			"name with _via_",
+			schema.SchemaField{
+				Type: schema.FieldTypeText,
+				Id:   "1234567890",
+				Name: "a_via_b",
+			},
+			[]string{"name"},
+		},
 		{
 			"reserved name (null)",
 			schema.SchemaField{