[hibernate-issues] [Hibernate-JIRA] Commented: (HSEARCH-682) DSL cannot handle fieldBridge for @IndexEmbedded fields

[Emmanuel Bernard (JIRA)]

    [ http://opensource.atlassian.com/projects/hibernate/browse/HSEARCH-682?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=42672#action_42672 ] 

Emmanuel Bernard commented on HSEARCH-682:
------------------------------------------

Hi Nick, sorry we did not replay to you any faster. Do you think you could add your test as a GitHub pull-request. From here we could easily try and exchange and make your test run.

> DSL cannot handle fieldBridge for @IndexEmbedded fields
> -------------------------------------------------------
>
>                 Key: HSEARCH-682
>                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HSEARCH-682
>             Project: Hibernate Search
>          Issue Type: New Feature
>          Components: query
>    Affects Versions: 3.3.0.Final
>         Environment: Hibernate 3.6.0, HSearch 3.3.0, Mysql 5.1.52.
>            Reporter: Nick Fenwick
>             Fix For: 4.0
>
>         Attachments: HSEARCH-682-unittest1.tgz
>
>
> Discussed in https://forum.hibernate.org/viewtopic.php?f=9&t=1009440, "Re: Correct to use ignoreFieldBridge for "subentity.field" DSL?".
> I find I have to set ignoreFieldBridge when querying for a field indexed using @IndexEmbedded, i.e.:
> {code}@Entity
> class CategoryEntity {
>    @Column(name="lft")
>    @Field(name="left", index=Index.UN_TOKENIZED, store=Store.YES)
>    @FieldBridge(impl=PadNumberBridge.class,
>          params = { @Parameter(name="pad", value="4") }
>    )
>    private int left;
>    ... same for 'right' ...
> }
> @Entity
> class ItemEntity {
>    @IndexedEmbedded(depth=1)
>    private CategoryEntity category;
> }{code}
> results in fields for ItemEntity being stored in the Lucene index like:
> {code}
> category.left = 0004
> category.right = 0012
> {code}
> To query for these, I cannot do:
> {code}
> qb.range().onField("category.left").above(4).createQuery()
> {code}
> I get an exception saying it doesn't know what FieldBridge to use for "category.left".  Instead, I can do:
> {code}
> qb.range().onField("category.left").ignoreFieldBridge().above(4).createQuery()
> {code}
> but the 'value' is no longer padded according to the FieldBridge that was specified in CategoryEntity for its 'left' attribute, I have to pass value as e.g. "0004".
> It would be good to mention this situation in the documentation (5.1.2. "Building a Lucene query with the Hibernate Search query DSL"), at least to specify that it is/isn't supported, so that people attempting this kind of @IndexEmbedded mapping know how to safely build a query for such fields.

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