Hello,
I'm trying to setup Solr for fetching hierarchical facets.
Please advice which of the below approaches should be followed for my
scenario.
*Scenario:
*
NonFic
Hist
HistBook1
HistBook2
Sci
Phy
Quantum
Pbook1
Pbook2
Thermodynamics
Pbook3
Pbook4
Chem
Cbook1
Math
Mbook1
Fic
Mystery
Mybook1
Childrens
Chbook1
Chbook2
*Sample document*
<doc>
name=Pbook1
category=NonFic/Sci/Phy/Quantum
author=ABC
price=20.00
<doc>
*Requirements:*
-Show drill down facets
-If user searched for "*", the initial set of facets to be shown are
'NonFic' and 'Fic'
-If user selects facet 'NonFic', we then show the facets 'Hist' and 'Sci'
only.
*Option1:*
/Solr schema:/
<field indexed="true" multiValued="true" name="category" required="true"
stored="true" type="string"/>
/Document supplied for indexing:/
<doc>
name=Pbook1
category=0/NonFic
category=1/NonFic/Sci
category=2/NonFic/Sci/Phy
category=3/NonFic/Sci/Phy/Quantum
category=0/Other (a book can belong to multiple categories)
author=ABC
price=20.00
<doc>
With Option2, we can do a drill down facet query.
For example, if we give facet.prefix=NonFic/Sci/, the facet results are:
NonFic/Sci/Phy
NonFic/Sci/Chem
NonFic/Sci/Math
The only issue is that I have to take care of generating all possible path
information for 'category'
*Option2:*
/Solr schema:/
<fieldType class="solr.TextField" name="path">
<analyzer type="index">
<tokenizer class="solr.PathHierarchyTokenizerFactory" delimiter="/"/>
</analyzer>
</fieldType>
<field indexed="true" multiValued="true" name="category" required="true"
stored="true" type="path"/>
/Document supplied for indexing:/
<doc>
name=Pbook1
category=NonFic/Sci/Phy/Quantum
author=ABC
price=20.00
<doc>
With Option2, we can do facet query but it returns all possible combination
of paths.
For example, if we give facet.prefix=Fic, the facet results are:
Fic (3)
Fic/Mystery (1)
Fic/Childrens (2)
I'm looking to supply a doc with just a single entry (like
'category=NonFic/Sci/Phy/Quantum' ) and be able to do a drill down query. Is
there some existing Solr tokernizer which takes care of generating all
possibly combinations which indexing instead of having to generating them as
part of <doc> creation?
Thanks
--
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