sdn-university

In an attempt to recreate the Spring Data Neo4j official Movies example in Scala I have ran into an issue jsonifying on the Spring Data Neo4j layer.

The details are noted in the README in this example project.

Booting the Spring app and hitting /movies/ gives the following stacktrace:

018-03-27 15:33:23 WARN DefaultHandlerExceptionResolver:442 - Failed to write HTTP message: org.springframework.http.converter.HttpMessageNotWritableException: Could not write JSON: Invalid Object Id definition for movies.Movie: cannot find property with name 'id'; nested exception is com.fasterxml.jackson.databind.JsonMappingException: Invalid Object Id definition for movies.Movie: cannot find property with name 'id' (through reference chain: org.springframework.hateoas.PagedResources["_embedded"]->java.util.Collections$UnmodifiableMap["movies"]->java.util.ArrayList[0])

I have opened an official Spring Data Neo4j JIRA issue here.

Edit: After the latest comment, I have removed unrelated theories about the root cause from this post. And I have updated the example project to expose the IDs on the Spring Data Rest layer using a PostConstruct method (thanks @meistermeier). I also tried the RepositoryRestConfigurerAdapter method. However, the original HttpMessageNotWritableException persists. Any ideas?

Update: Modeling Movie.scala after SDN-University example, I tried using com.voodoodyne.jackson.jsog.JSOGGenerator as an Object ID Generator. I can successfully hit /movies/ but the only key is "id", and it's simply an index, and not the actual id. However, 38 movies do return, the amount in the Movies data set. I would think this narrows down the issue to the jsonfying part.

Update 2: By using a bandaid to manually form the json in the controller (using an object-to-map function, and a map-to-json function) I am finally able to send data out through the endpoints. I have updated the example project to demonstrate this. I can successfully retrieve objects from the movieRepository, and manipulate them as I please. I think this has clearly narrowed down the problem to the jsonification. Does anyone have a clear example (Java or Scala) on how to properly annotate NodeEntity with JsonIdentifyInfo?