v0.0.512

gojson/encode.go

@@ -788,7 +788,7 @@ FieldLoop:
 
 		if f.omitEmpty && isEmptyValue(fv) {
 			continue
-		} else if opts.filter != nil && !matchesJSONFilter(f.jsonfilter, *opts.filter) {
+		} else if !matchesJSONFilter(f.jsonfilter, opts.filter) {
 			continue
 		}
 		e.WriteByte(next)
@@ -808,16 +808,20 @@ FieldLoop:
 	}
 }
 
-func matchesJSONFilter(filter jsonfilter, value string) bool {
+func matchesJSONFilter(filter jsonfilter, value *string) bool {
 	if len(filter) == 0 {
-		return true
+		return true // no filter in struct
+	}
+
+	if value == nil || *value == "" {
+		return false // no filter set, but struct has filter, return false
 	}
 
 	if len(filter) == 1 && filter[0] == "-" {
 		return false
 	}
 
-	if filter.Contains(value) {
+	if filter.Contains(*value) {
 		return true
 	}