package filters var FilterRegistry = map[string]Filter{ "Eq": &Eq{}, "Ne": &Ne{}, "Gt": &Gt{}, "Gte": &Gte{}, "Lt": &Lt{}, "Lte": &Lte{}, "In": &In{}, "Between": &Between{}, "NotBetween": &NotBetween{}, "Glob": &Glob{}, } func Convert(ctx Context, json interface{}) string { for _, t := range FilterRegistry { value := t.FromJSON(json).ToSQLPart(ctx) if value != "" { return value } } return "" }