CODEWITHSUNDEEP
google-app-engine
Efstathios Kalyvas
Efstathios Kalyvas

Reputation: 93

How to implement auto suggestion (auto complete) functionality in GAE

I want to implement auto suggest functionality in Google App Engine (GAE/GWT).

The client side of the implementation works fine with GWT SuggestBox and RPC. My main issue is the server side of the implementation. I tried the Google search API but it seems that there is a limitation of 250MB of total indexed data and the search can be performed on complete words and not parts of each word!

How should I approach this? I read that lucene or solr is not supported in GAE. I would appreciate your thoughts on this.

Upvotes: 7

Views: 1560

Answers (2)

Peter Knego
Peter Knego

Reputation: 80340

I've taken this approach and it works fine for me:

  1. Split up text into separate words. Get rid of duplicates, special characters and short words (in, of, and, etc..).

  2. Add this list of words to entity as a list property.

  3. Search via text range query: listProperty >= wordPart && listProperty < wordPart + "\ufffd"

Upvotes: 3

Gilberto Torrezan
Gilberto Torrezan

Reputation: 5267

You can achieve a basic text search using these techniques described here: http://googlecode.blogspot.com.br/2010/05/google-app-engine-basic-text-search.html

In short:

Build a query using content >= yourQuery && content < yourQuery + "\ufffd", where the content property of your entity can be a String or a List of Strings.

Upvotes: 4

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