POST to Spring/Hibernate backend with Postgres

Question

I'm trying to send this JSON to my Java backend

{  
 "title": "TITOLO", 
 "description": "DESCRIZIONE", 
 "mediaType": "MEDIATYPE" 
}

but for some reasons, I cannot write it correctly to my DB. Some teammates can do it without problems but I get this error from Postman:

{
    "timestamp": 1526753419760,
    "status": 500,
    "error": "Internal Server Error",
    "message": "Type definition error: [simple type, class isssr.ticketsystem.entity.Ticket]; nested exception is com.fasterxml.jackson.databind.exc.InvalidDefinitionException: Cannot construct instance of `isssr.ticketsystem.entity.Ticket` (no Creators, like default construct, exist): cannot deserialize from Object value (no delegate- or property-based Creator)\n at [Source: (PushbackInputStream); line: 2, column: 2]",
    "path": "/ticketsystem/ticket"
}

I wrote on their local DB without problems but they cannot do the same to mine.

Why this?

My OS is MacOS X High Sierra 10.13.4, using as IDE Intellij IDEA.

UPDATE

Problem was Java 10. With a downgrade to Java 8, all works fine.

Does the ticket pojo have empty constructor? Or are you maybe using some annotation that creates default constructor? — vanillaSugar, May 19 '18 at 18:51
@vanillaSugar actually there is a constructor, that is not empty, and my team mates can create a row without any problems — JackLametta, May 19 '18 at 19:48
I understand. If you can, try to add an empty constructor and see if it helps. Things can be tricky even if that seems impossible — vanillaSugar, May 19 '18 at 19:50
@vanillaSugar I tried but It creates a row in the DB with all columns as null — JackLametta, May 19 '18 at 19:51
Ok, revert that change then. Try to add annotation @JsonProperty to every field in Ticket. i.e: @JsonProperty("Name") public String name; — vanillaSugar, May 19 '18 at 19:56
@vanillaSugar yeah, but why my team mates can do it without problems? — JackLametta, May 19 '18 at 20:29
Find jackson in your dependencies and check its version. i.e. if you have pom.xml you can find it there — vanillaSugar, May 20 '18 at 10:08
Do you have exactly the same project? Is it on the version control? — vanillaSugar, May 20 '18 at 10:12
I suspect that jackson can behave differently on different OS. In this question we can see different behaviour as well. https://stackoverflow.com/questions/49901381/jackson-objectmapper-different-behavior-on-windows-and-macos .. I couldn't find the reason for this, but if you annotate pojos with JsonProperty it works right? — vanillaSugar, May 20 '18 at 10:24
Loog at this answer https://stackoverflow.com/questions/12583638/when-is-the-jsonproperty-property-used-and-what-is-it-used-for ..also you can look here http://www.baeldung.com/jackson-annotations — vanillaSugar, May 20 '18 at 10:31
that's not an explenation refer to my team mates correctly doing the save on the DB. @vanillaSugar — JackLametta, May 20 '18 at 12:21
Problem was java 10. Downgraded to 8 and all works fine. @vanillaSugar — JackLametta, May 24 '18 at 07:28
@JackLametta I see. But it is not very good solution to downgrade java — vanillaSugar, May 24 '18 at 11:55
@vanillaSugar actually it is not, but it would have required to anyone in the team to upgrade to my java. — JackLametta, May 24 '18 at 12:17
@JackLametta I thought that everyone had java 10. Alright, then good for you — vanillaSugar, May 24 '18 at 13:52

POST to Spring/Hibernate backend with Postgres

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