使用休眠搜索为Enum类型字段建立索引

Question

I am having problems searching using Hibernate search when the index I want to use is of an Enum type.

Here is an example of what my application looks like:

@Entity
@Indexed
public class MyEntity{
   @Id
   @Field 
   public Long id;
   @Field(bridge=@FieldBridge(impl=EnumBridge.class))
   public Flavour flavour;
}

with

public enum Flavour {
  vanilla,
  chocolate,
  strawberry,
  pistacchio;
}

Then I try to find all instances using this type of query.

QueryBuilder qb = [~] ;
Query q = qb.keyword().onField("flavour").matching(Flavour.vanilla).createQuery();

When I test this the results always comes empty. I even tried to see the content of the indexes using Luke and I do not seem to find "flavour". I do re-index everything after committing changes. Everyother type of indexing works and querying works perfectly on anything but enum fields.

I have tried almost any combination of the norms , analyze , index , store , ... of the @Field annotation (I am using Hibernate-search 4.5.x with hibernate 4.3.1).

What am I doing wrong? Any settings I should be looking at? Any help is welcome.

Answer 1

The entity seems to store the flavour using the ordinal (so the column flavour contains 0 instead of "vanilla").

I don't know, what the EnumBridge is doing, but I would suggest to store the enumeration as a string:

@Entity
@Indexed
public class MyEntity{
    @Id
    @Field 
    public Long id;

    @Field(bridge=@FieldBridge(impl=EnumBridge.class))
    @Enumerated(EnumType.STRING)
    public Flavour flavour;
}