NestedEntitySerializer does not support Maps [DATAREST-864]

[spring-projects-issues]

Petar Tahchiev opened DATAREST-864 and commented

With the latest Hopper-SR2 I get the following error:

2016-07-30 15:50:16,189 [main] WARN : Failed to write HTTP message: org.springframework.http.converter.HttpMessageNotWritableException: Could not write content: PersistentEntity must not be null! (through reference chain: org.springframework.data.rest.webmvc.json.["content"]->com.nemesis.platform.module.cms.core.entity.ListerPageEntity["title"]); nested exception is com.fasterxml.jackson.databind.JsonMappingException: PersistentEntity must not be null! (through reference chain: org.springframework.data.rest.webmvc.json.["content"]->com.nemesis.platform.module.cms.core.entity.ListerPageEntity["title"])

My entity has a Map<Locale, LocalizedValue> where LocalizedValue is @Embedable and in my case entity is null because in PersistentEntityJackson2Module you look it up like this

PersistentEntity<?, ?> entity = entities.getPersistentEntity(value.getClass());

but value is a Map so value.getClass() returns PersistentMap.

Sounds like you need a dedicated clause for Maps in NestedEntitySerializer.serialize(…).

---

Affects: 2.5.2 (Hopper SR2)

Referenced from: pull request #219

Backported to: 2.5.3 (Hopper SR3)

3 votes, 3 watchers

[spring-projects-issues]

Petar Tahchiev commented

Here's a very trivial pull-request. I've tested and it worked fine with it: #219

[spring-projects-issues]

Petar Tahchiev commented

Any updates here? I'm really hoping this could go into HopperSR3 :)

[spring-projects-issues]

Falk Hartmann commented

I tried the changed PersistentEntityJackson2Module with Spring Data Hopper SR2 and it solved my serialization problem (a Map<Date, @Embeddable>) as well