fix: cannot get value of pointer value

query/query.go

@@ -2,6 +2,7 @@ package query
 
 import (
 	"fmt"
+	"reflect"
 	"strings"
 
 	"github.com/Moranilt/http-utils/validators"
@@ -238,6 +239,16 @@ func buildComparison(fieldName string, value any, comparison string) string {
 	if isEmpty(fieldName) {
 		panic("fieldName cannot be empty")
 	}
+	v := reflect.ValueOf(value)
+	if v.Kind() == reflect.Ptr {
+		if v.IsNil() {
+			value = nil
+		} else if v.IsValid() {
+			value = v.Elem().Interface()
+		} else {
+			panic("not supported type. Supports only numbers, string, bool, nil")
+		}
+	}
 	switch value.(type) {
 	case int, int8, int16, int32, int64, uint, uint8, uint16, uint32, uint64:
 		return fmt.Sprintf("%s %s %d", fieldName, comparison, value)
@@ -253,7 +264,7 @@ func buildComparison(fieldName string, value any, comparison string) string {
 	case nil:
 		return fmt.Sprintf("%s %s NULL", fieldName, comparison)
 	default:
-		panic("not supported type. Supports only numbers, string, bool")
+		panic("not supported type. Supports only numbers, string, bool, nil")
 	}
 }
 

query/query_test.go

@@ -364,6 +364,16 @@ var tests = []testItem{
 		},
 		expected: "SELECT * FROM users WHERE name IS NULL",
 	},
+	{
+		name: "using IS NULL where name is pointer string",
+		callback: func(t *testing.T) string {
+			var name *string
+			query := New("SELECT * FROM users")
+			query.Where().IS("name", name)
+			return query.String()
+		},
+		expected: "SELECT * FROM users WHERE name IS NULL",
+	},
 	{
 		name: "using IS NULL and OR",
 		callback: func(t *testing.T) string {