> Actually I plan to write a bigger blog post about the
> approach. In order to match the different fields I actually
> have a separate core with an index dedicated to auto suggest
> alone where I merge all fields together via some javascript
> code:
>
> This way I can then use terms for a single word entered and
> a facet prefix search with the last term as the prefix and
> the rest as the query for multi term entries into the auto
> suggest box.
>
> The idea is that I can then enter any part of any of the
> fields, but I will then be suggested the entire phrase in
> that field:
>
> So if I have a field:
> Foo Bar Ding Dong
>
> and I enter "ding" into the search box, I would get a
> suggestion of "Foo Bar Ding Dong"
If I am not wrong you have a list of suggestion candidates indexed in a
separate core dedicated to auto suggest alone.
I think you can use this field type for suggestion.
<fieldType name="prefix_token" class="solr.TextField" positionIncrementGap="1">
<analyzer type="index">
<tokenizer class="solr.WhitespaceTokenizerFactory" />
<filter class="solr.LowerCaseFilterFactory" />
<filter class="solr.EdgeNGramFilterFactory" minGramSize="1" maxGramSize="20"
/>
</analyzer>
<analyzer type="query">
<tokenizer class="solr.WhitespaceTokenizerFactory" />
<filter class="solr.LowerCaseFilterFactory" />
</analyzer>
</fieldType>
With this field type, the query "ding" or "din" or "di" would return "Foo Bar
Ding Dong".
Also you do not need to index all combinations like:
{foo} Foo Bar Ding Dong
{bar} Foo Bar Ding Dong
{ding}Foo Bar Ding Dong
{dong}Foo Bar Ding Dong
