feat: add a replacewith tag in struct

parser.go

@@ -150,6 +150,8 @@ type Parser struct {
 type field struct {
 	// Name of the column.
 	Name string
+	// Has a "replacewith" option in the tag. If present, the name of the column will be converted to this name
+	ReplaceWith string
 	// Has a "sort" option in the tag.
 	Sortable bool
 	// Has a "filter" option in the tag.
@@ -229,6 +231,8 @@ func (p *Parser) parseField(sf reflect.StructField) error {
 			f.Filterable = true
 		case strings.HasPrefix(opt, "column"):
 			f.Name = strings.TrimPrefix(opt, "column=")
+		case strings.HasPrefix(opt, "replacewith"):
+			f.ReplaceWith = strings.TrimPrefix(opt, "replacewith=")
 		case strings.HasPrefix(opt, "layout"):
 			layout = strings.TrimPrefix(opt, "layout=")
 			// if it's one of the standard layouts, like: RFC822 or Kitchen.

validation.go

@@ -100,7 +100,13 @@ func (p *Parser) GetFieldValidationFunc() ValidationFunc {
 					if !ok || !f.Filterable {
 						return fmt.Errorf("field name (arg: %s) is not filterable", v)
 					}
+					if !IsValidField(v) {
+						return fmt.Errorf("field name (arg: %s) is not valid", v)
+					}
 					field = f
+					if field.ReplaceWith != "" {
+						n.Args[i] = field.ReplaceWith
+					}
 				} else {
 					if field == nil {
 						return fmt.Errorf("no field is found for node value %s", v)
@@ -178,3 +184,12 @@ func (p *Parser) validateLimit(l string) error {
 	}
 	return nil
 }
+
+func IsValidField(s string) bool {
+	for _, ch := range s {
+		if !IsLetter(ch) && !IsDigit(ch) && ch != '_' && ch != '-' && ch != '.' {
+			return false
+		}
+	}
+	return true
+}