Re: [eclipselink-users] Problem Persisting a Map

[phil rod <philrod.phil@xxxxxxxxx>]

Anyone has any suggestions for what I am seeing here with persisting a Map ? Thanks.

On Fri, May 20, 2011 at 5:27 PM, phil rod <philrod.phil@xxxxxxxxx> wrote:

Hi Tom, Like you suggested I am actually specifying the cascade type for the associations and also the base object is managed . pls see below. Am I missing something more here ?

On Fri, May 20, 2011 at 1:02 PM, phil rod <philrod.phil@xxxxxxxxx> wrote:

Thanks for the pointers!

 

I have a Map of Map and I am trying to update the value of the same key ,

like if I have <ui 8,9> next time I want to have <ui, 8,9,10>

 

I have specified the Cascade type in MyPref class for PDMap attributes, and for the

Map<String, PD>   mapOfMaps = *new* HashMap<String, PD>(); in PDMap class

 

 

however I am not sure how I can specify the cascade Type for the value type <PD> in the mapOfMaps ?

 

And also I am actually doing this in a transaction and is managed and the steps are :

 em.find(myPref)  //myPref is the base object holding the associations

 myPref.setAttribute("ui", "recentProjs","8,9"); //basically here I am trying to update the vlaue of the Map for the same key

em.merge(myPref)

 

 

On Fri, May 20, 2011 at 11:30 AM, Tom Ware <tom.ware@xxxxxxxxxx> wrote:

It's not completely clear to me what you are trying to do but...

For changes to be detected in an object, it must be managed.  I don't see an settings that would cause your merge to be cascaded.  Try either explicitly merging the objects you want to see changes for, or setting the mappings on your graph to cascade their merge.

-Tom

phil rod wrote:

Any suggestions and ideas how to solve this ?
 While posting I missed one the fields for this class:
class PD {
 long id;
 String name;

@ManyToOne

*private* PDMap dMap;

@Converter

(name="mapConverter", converterClass=StringMapJsonSerializedObjectConverter.*class*)

@Convert("mapConverter")

Map<String, Object> map = *new* HashMap<String, Object>();

 }

On Wed, May 18, 2011 at 8:45 AM, phil rod <philrod.phil@xxxxxxxxx <mailto:philrod.phil@xxxxxxxxx>> wrote:

   Hi All,
        I have the following Mappings:
        class MyPref {
        long id;

   @OneToOne

   (cascade=CascadeType./ALL/, fetch=FetchType./EAGER/)

   **PDMap attributes = *new* PDMap();
   }
        class PDMap {
        long id;

   @OneToMany

   (mappedBy="dMap", cascade=CascadeType./ALL/, fetch=FetchType./EAGER/)

   @MapKey(name="name")

   Map<String, PD>

   mapOfMaps = *new* HashMap<String, PD>();
   }
        table PD
   class PD {
        long id;

   @ManyToOne

   *private* PDMap dMap;

   @Converter

   (name="mapConverter",
   converterClass=StringMapJsonSerializedObjectConverter.*class*)

   @Convert("mapConverter")

   Map<String, Object> map = *new* HashMap<String, Object>();

        }
        I am trying to do the following .
        first time I insert into the entities using the key "ui" for PDMap
   and the key "recentprojs" for the PD's map.
        PDMap looks like this
   id , creationdate, lastupdatedate
   1 , date, date
        table PD looks like this:
   id, name, map dmap_id
   1, "ui", {"recentprojs":"11"}, 1
        next time when I retreive the same row using
        myPref.getAttribute("ui","recentprojs"); i get the right row.
        now I am trying to update that entry to something like this:
        myPref.setAttribute("ui","recentprojs", "11,9");
   em.merge(myPref)
        so that PD table look like this:
   id, name, map dmap_id
   1, "ui", {"recentprojs":"11,9"}, 1
        and PDMap updates the respective dates,
             but since I am updating the value for the same key its not detecting
   any changes and no updates happen to the tables... why is this ?
        but when I change the it to something like this :
   userPref.setAttribute("ui_1","recentproj", "11,9"); a new record
   gets inserted in PD table but no update to the dates in PDMap table.          but What I want to achieve is update the same row with the
   new/updated values, how can I do this , and what is happening here..
   Appreciate Any suggestiongs and ideas ?
        Thank you!
        Phil
             

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