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#jackson-kotlin
  • c

    Czar

    11/17/2015, 12:08 PM
    No, in Spring
  • a

    apatrida

    11/17/2015, 12:08 PM
    you didn't
  • c

    Czar

    11/17/2015, 12:08 PM
    I haven't tried bare reader yet
  • a

    apatrida

    11/17/2015, 12:08 PM
    what was the original problem, thought it was this one
  • a

    apatrida

    11/17/2015, 12:08 PM
    Copy code
    /**
	give it POST `{"host":{"id":"1","name":"Czar"},"activity":"playing RPG","invited":[]}` and you'll get:
	`.c.j.MappingJackson2HttpMessageConverter : Failed to evaluate deserialization for type [simple type, class controllers.Event]: com.fasterxml.jackson.databind.JsonMappingException: Argument #0 of constructor [constructor for controllers.Guest, annotations: {interface com.fasterxml.jackson.annotation.JsonCreator=@com.fasterxml.jackson.annotation.JsonCreator()}] has no property name annotation; must have name when multiple-parameter constructor annotated as Creator`
	*/
  • a

    apatrida

    11/17/2015, 12:08 PM
    this?
  • c

    Czar

    11/17/2015, 12:08 PM
    yep
  • a

    apatrida

    11/17/2015, 12:09 PM
    1 sec
  • a

    apatrida

    11/17/2015, 12:10 PM
    get rid of all your @JsonCreator and @JsonProperty annotations first, they don’t add anything but set up a requirement to be consistent for everything
  • a

    apatrida

    11/17/2015, 12:10 PM
    I’ll check why they are being ignored, but likely that they are being applied to the property and not the getter/setter which Jackson sees
  • a

    apatrida

    11/17/2015, 12:12 PM
    adding a test case to check, back in a moment
  • c

    Czar

    11/17/2015, 12:13 PM
    getting rid of 
    @JsonCreator
    and 
    @JsonProperty
    makes things worse 😄 
    java.lang.NoSuchMethodError: com.fasterxml.jackson.databind.introspect.AnnotatedConstructor.getContextClass()Lcom/fasterxml/jackson/databind/introspect/AnnotatedClass;
  • a

    apatrida

    11/17/2015, 12:15 PM
    you have a mismatch in your Jackson version from the one supported
  • a

    apatrida

    11/17/2015, 12:15 PM
    what version is jackson is being used?
  • c

    Czar

    11/17/2015, 12:15 PM
    that may be, I'm using spring's version management, let me check the exact version…
  • c

    Czar

    11/17/2015, 12:16 PM
    It's 
    2.4.6
  • a

    apatrida

    11/17/2015, 12:18 PM
    yeah, that’ll be a problem with Kotlin, you need to upgrade
  • c

    Czar

    11/17/2015, 12:19 PM
    grrrr
  • a

    apatrida

    11/17/2015, 12:19 PM
    you can try forcing Kotlin to 
    2.6.3
    since usually it is mostly backwards compatible
  • a

    apatrida

    11/17/2015, 12:19 PM
    or I can try a backport to 2.4.6 of the module, but not sure if everything is the same for the plugin API's
  • c

    Czar

    11/17/2015, 12:20 PM
    I think it is worth the effor of backporting, since many people rely on spring platform or spring boot's version management, so many would face the same problem. In my case I'll try upgrading as this is not a commercial product I'm developing, I'm just trying kotlin out on a real but not commercial project simple smile
  • a

    apatrida

    11/17/2015, 12:23 PM
    can you see if pushing Jackson to 2.6.3 in your dependencies breaks spring or not, likely they use only outside API’s which likely didn’t change
  • a

    apatrida

    11/17/2015, 12:23 PM
    but the internal plugin API’s did
  • a

    apatrida

    11/17/2015, 12:23 PM
    so most of the time, pushing Jackson to a current version in your maven or gradle helps but doesn’t hurt
  • a

    apatrida

    11/17/2015, 12:24 PM
    the way you coded it before should have worked without the module because you have all of the right annotations to force it to work, checking byte code of hte classes to see why it doesn’t see them
  • a

    apatrida

    11/17/2015, 12:25 PM
    the annotation JsonProperty without a target for the annotation (set, get, param, etc) is being put on the parameter only and not the getter
  • a

    apatrida

    11/17/2015, 12:25 PM
    so that wouldn’t do what you would expect later for serialization
  • a

    apatrida

    11/17/2015, 12:26 PM
    if you use the module you don’t have to worry about that
  • a

    apatrida

    11/17/2015, 12:28 PM
    it would be ugly to fix your annotations:
    Copy code
    data class Guest @JsonCreator constructor(
            @param:JsonProperty("id") @get:JsonProperty("id") val id: String, 
            @param:JsonProperty("name") @get:JsonProperty("name") val name: String,
            @param:JsonProperty("rsvp") @get:JsonProperty("rsvp") var rsvp: RSVP = RSVP.interested)
  • a

    apatrida

    11/17/2015, 12:28 PM
    ick!
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