Spring Boot 动态字段

Question

How to handle the dynmaic fields creation in ui and mapping it to the backend in the spring boot. I have all the fields in the mysql and data storage in mongo. How to map with pojo entity to save and retrive.

I have tried with the pojo and without pojo mpaiings using spring jpa.

Answer 1

"dynamic" fields? Do you mean adding columns on the flight? This is looks like LOV (anti-)pattern that could be mapped to an entity (id, owner_id, key, value) where all values will be store as string, the key will be your field name, id an IDENTITY, and owner_id the FK on the other entity owning the set of (key, value).

Answer 2

you UI consume a rest api that returns a list of fields to display. Up to you to choose how to store it: In a relational database, you need to have a principal table and a table that store the fields and then you can retrieve it by a join. In a mongodb, you can have a document, the fields will be a part of it as a json array and then you can retrive it by parsing the json.

Is that you want to do? The how depends on what framework you use (I see Spring) (So Spring data works both with a mongodb and a mysql)