Book Image

Mastering Google App Engine

By : Mohsin Hijazee, Mohsin Shafique
Book Image

Mastering Google App Engine

By: Mohsin Hijazee, Mohsin Shafique

Overview of this book

Table of Contents (18 chapters)
Mastering Google App Engine
Credits
About the Author
Acknowledgments
About the Reviewers
www.PacktPub.com
Preface
Index

Pagination


The last piece of the puzzle is pagination. So let's look into that. By default when you issue an index.search() call, the first 20 matching documents are returned and the result is actually a search.SearchResult instance, which has the following properties:

  • results: This are the list of ScoreDocument instances. Each object in this list has fields property that we already have seen. The number of items by default are 20 but you can increase that number by supplying a limit keyword argument to search.QueryOptions.

  • cursor: This is a pointer to the last document in the results list above. So the next time you execute index.search() with the same query and pass this as cursor keyword argument, the read operation will start from that point. More on this later.

  • number_found: This is the total number of matching documents. This value is an estimate if the number of matching documents is more the number_found_accuracy. More on that later.

There's a keyword argument to the search.QueryOptions...