Hi,
I have some question regarding nested document queries.
For example, let’s say that I have many books, one of which is the
following one:
Book _title: Nested documents for dummies
Chapter1_Title: Introduction
Chapter1_Content: Nested documents are fun.
Chapter2_Title: Which technology should I use?
Chapter2_Content: Lucene of course!
First I want to find books that contain an introduction and that are
about Lucene. So I decide to flatten my data and use 3 multivalued
fields (Book_Title,Chapter_Title and Chapter_Content), I index my
document and then I get what I want when I run the following query : “
chapter_title:Introduction AND chapter_title:Lucene “
But now I want to find books that contain “fun” in a chapter which name
is “introduction”. My model is no more valid (Chapter2_content is no
more linked with Chapter2_title). That is why I change my datamodel and
use nested documents:
I now have a parent with a single valued field Book_title and different
childs with single valued fields Chapter_title and Chapter_Content. Now,
when I run the query “chapter_title: Introduction AND
chapter_content:fun” I also get what I want… But what do I have to do if
I want to use these two kinds of query with a unique data model?
Maybe the only way to do this is to use nested documents and to index
data both in child documents and in a flattened form in the parent
document. Then we will be able to run the two different queries.
Do you have any other (better) idea?
Thank you,
Regards,
Aurélien
