René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Deserilization to type String","articleBody":"I have added the column 'created' to the table 'AppUser' in the example-postgresql\r\n\r\n```\r\nCREATE TABLE IF NOT EXISTS AppUser (\r\n    id                      varchar (256) PRIMARY KEY,\r\n    username                varchar (256) NOT NULL,\r\n    email                   varchar (256) NOT NULL,\r\n    password                varchar (256) NOT NULL,\r\n    role                    varchar (256) NULL,\r\n    created                 timestamp DEFAULT now(), -- NEW COLUMN --\r\n    CONSTRAINT              UK_APPUSER_USERNAME UNIQUE (username),\r\n    CONSTRAINT              UK_APPUSER_EMAIL UNIQUE (email)\r\n);\r\n```\r\nI have modified 'UserDto.hpp' to add the field as String ` DTO_FIELD(String, created, \"created\");`\r\n\r\nbut when I try to test the endpoint of getUserById to select some user, I get the following error\r\n```\r\n{\r\n  \"status\": \"ERROR\",\r\n  \"code\": 500,\r\n  \"message\": \"[oatpp::postgresql::mapping::Deserializer::deserializeString()]: Error. Unknown OID.\"\r\n}\r\n```\r\nas I understand from the error message I have to perform a conversion type to take the timestamp value to string \r\n\r\nHow can I do this?\r\n","author":{"url":"https://github.com/quijos12","@type":"Person","name":"quijos12"},"datePublished":"2022-02-07T15:17:14.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":1},"url":"https://github.com/4/example-postgresql/issues/4"}