Re: Digest for bowler-users@googlegroups.com - 3 Messages in 1 Topic

[Mrityunjay Kant]

Hi,

Thanks for the suggestions. I ended up doing the same; defining my own Renderer and plugging it in using BowlerConfigurator.

I think it would be good to have a utility class/object that can include additional Serializers without having to go though all the hoops. I'll check the Bowler code and see if I can add something for it.

Happy Holidays and Merry Christmas.
Mrityunjay

On Sat, Dec 24, 2011 at 11:13 AM, <bowler...@googlegroups.com> wrote:

  Today's Topic Summary

Group: http://groups.google.com/group/bowler-users/topics

• ObjectId getting rendered as empty list [3 Updates]

 ObjectId getting rendered as empty list

Mrityunjay Kant <kant.mr...@gmail.com> Dec 23 02:33AM -0800  

Hi,
 
I have the following case class for storage in MongoDb:
 
case class Item(_id : ObjectId, name : String, value : String)
 
When I return this case object back to client I need to include value
for _id field. However, the _id column is being returned as an empty
list in Json output instead of its actual value.
 
{"_id":{},"name":"Id Test","value":"id test"}
 
Any pointers on how this can be fixed will be greatly appreciated.


 

Mrityunjay Kant <kant.mr...@gmail.com> Dec 23 06:26AM -0800  

Update: I tried using custom serializer for it but for some reason it
doesn't get called!
 
class ObjectIdSerializer extends Serializer[ObjectId] {
private val Class = classOf[ObjectId]
 
def deserialize(implicit format: Formats) = {
case (TypeInfo(Class, _), json) => json match {
case JObject(JField("_id", JString(s)) :: Nil) => new
ObjectId(s)
case x => throw new MappingException("Can't convert " + x + "
to ObjectId")
}
}
 
def serialize(implicit format: Formats) = {
case x: ObjectId => { println("\t @@@@@@@@Custom Serializer was
called!"); JObject(JField("_id", JString(x.toString)) :: Nil)}
}
}
 
implicit val formats = DefaultFormats + new ObjectIdSerializer
 
 


 

Wille Faler <wille...@gmail.com> Dec 23 07:24PM  

Hi,
I suspect this is because the Serializer doesn't get set in the
RenderStrategy:
https://github.com/wfaler/Bowler/blob/master/core/src/main/scala/org/bowlerframework/view/DefaultRenderStrategy.scala
 
I think the fix for this is to make sure the JSONRenderStrategy in the same
package can take an arbitrary number of serializers in it's constructor,
then allowing this to be set via the RenderStrategy, and set a
RenderStrategy with your configurations in the BowlerConfigurator.
 
If you want to fix it (should be relatively simple), I'd be happy to accept
a pull request that sorts this out (the above mentioned are the three main
places I think that you might want to look at).
Otherwise, please raise a ticket and I'll fix it next week, but at the
moment I am indisposed due to Christmas for a few days.
 
..also tempting you to fix it, because I'd love to see some more
contributions. ;)
 


 

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[Wille Faler]

Hi,

I'd be happy to look at your thoughts in a pull request! I definitely know this is an area that needs addressing (I've bumped my own head into it a couple of times), though it shouldn't be too hard to fix.