FT.CREATE: ON HASH and ON JSON are mutually exclusive

Error message

FT.CREATE: ON HASH and ON JSON are mutually exclusive

What it means

Error "FT.CREATE: ON HASH and ON JSON are mutually exclusive" thrown in redis/go-redis.

Source

Thrown at search_commands.go:1395

// FTCreate - Creates a new index with the given options and schema.
// The 'index' parameter specifies the name of the index to create.
// The 'options' parameter specifies various options for the index, such as:
// whether to index hashes or JSONs, prefixes, filters, default language, score, score field, payload field, etc.
// The 'schema' parameter specifies the schema for the index, which includes the field name, field type, etc.
// For more information, please refer to the Redis documentation:
// [FT.CREATE]: (https://redis.io/commands/ft.create/)
func (c cmdable) FTCreate(ctx context.Context, index string, options *FTCreateOptions, schema ...*FieldSchema) *StatusCmd {
	args := []interface{}{"FT.CREATE", index}
	if options != nil {
		if options.OnHash && !options.OnJSON {
			args = append(args, "ON", "HASH")
		}
		if options.OnJSON && !options.OnHash {
			args = append(args, "ON", "JSON")
		}
		if options.OnHash && options.OnJSON {
			cmd := NewStatusCmd(ctx, args...)
			cmd.SetErr(fmt.Errorf("FT.CREATE: ON HASH and ON JSON are mutually exclusive"))
			return cmd
		}
		if options.Prefix != nil {
			args = append(args, "PREFIX", len(options.Prefix))
			args = append(args, options.Prefix...)
		}
		if options.Filter != "" {
			args = append(args, "FILTER", options.Filter)
		}
		if options.DefaultLanguage != "" {
			args = append(args, "LANGUAGE", options.DefaultLanguage)
		}
		if options.LanguageField != "" {
			args = append(args, "LANGUAGE_FIELD", options.LanguageField)
		}
		if options.Score > 0 {
			args = append(args, "SCORE", options.Score)
		}

View on GitHub (pinned to c5cad058c7)

When it happens

Trigger: Thrown at search_commands.go:1395 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of redis/go-redis@c5cad058c7 (2026-09-01). Data as JSON: /api/errors/ea1551fae8958ddf. Report an issue: GitHub.