CODEWITHSUNDEEP
google-app-enginegae-search
Chameleon
Chameleon

Reputation: 10138

What should be default value for SortExpression Google App Engine search for 'distance()'?

I have such SortExpression:

from google.appengine.api.search import search

search.SortExpression(expression = 'distance(geoLocation, geopoint(%s, %s))' 
                      % (geoLatitude, geoLongitude),
                      direction = search.SortExpression.ASCENDING,
                      default_value = sys.float_info.max)

What should be default_value for distance()?

Currently sys.float_info.max works on SDK but generates errors on production:

InvalidRequest: Failed to parse search request "tag:"zamówienia internetowe" AND tag:"zamówienia na teraz""; Default text value is not appropriate for sort expression 'distance(geoLocation, geopoint(52.1967225, 20.8892005))'

Upvotes: 0

Views: 269

Answers (1)

Chris Bond
Chris Bond

Reputation: 51

If you want the default to be last in the results, I'd suggest picking a value that's larger than half the circumference of the Earth at its widest point (i.e., the equator). I believe that any value greater than 20,038,000 meters should be larger than any possible distance, even accounting for future refinements in how we model the Earth in production.

Chris

Upvotes: 1

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