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Solr Cookbook - Third Edition

You're reading from   Solr Cookbook - Third Edition Solve real-time problems related to Apache Solr 4.x and 5.0 effectively with the help of over 100 easy-to-follow recipes

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Product type Paperback
Published in Jan 2015
Publisher
ISBN-13 9781783553150
Length 356 pages
Edition 3rd Edition
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Author (1):
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Rafal Kuc Rafal Kuc
Author Profile Icon Rafal Kuc
Rafal Kuc
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Table of Contents (12) Chapters Close

Preface 1. Apache Solr Configuration FREE CHAPTER 2. Indexing Your Data 3. Analyzing Your Text Data 4. Querying Solr 5. Faceting 6. Improving Solr Performance 7. In the Cloud 8. Using Additional Functionalities 9. Dealing with Problems 10. Real-life Situations Index

Grouping documents by the function value


Imagine that you would like to group results not by using queries or field contents, but instead you would like to use a value returned by a function query. An example use case can be grouping documents on the basis of their distance from a point. Sounds nice right? Solr allows that and in this recipe, we will see how we can use a simple function query to group results.

Getting ready

In this recipe, we will use the knowledge that we've gained in the Grouping documents by the field value recipe in this chapter. Read the mentioned recipe before we continue.

How to do it...

  1. Let's start with the following index structure (just add the following fields definition to your schema.xml file):

    <field name="id" type="string" indexed="true" stored="true" required="true" />
    <field name="name" type="text_general" indexed="true" stored="true" />
    <field name="geo" type="location" indexed="true" stored="true" />
    <dynamicField name="*_coordinate"  type...
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