Hi Matthias, hi Werner,
mein Code (Sandbox Beispiel) lautet:
class SandboxController < ApplicationController
def lookup_geocodes
# your list of places. In a real app, this would come from the
database,
# and have more robust descriptions
places = [{:address=>'Munich, Germany',:description=>'Center'} ]
#{:address=>'1401 Valencia St, San Francisco,
CA',:description=>'Valencia'},
# {:address=>'501 Cole St, San Francisco, CA',:description=>'Cole'},
#{:address=>'150 Church st, San Francisco, CA',:description=>'Church'}
]
# this loop will do the geo lookup for each place
places.each_with_index do |place,index|
# get the geocode by calling our own get_geocode(address) method
geocode = get_geocode place[:address]
# geo_code is now a hash with keys :latitude and :longitude
# place these values back into our "database" (array of hashes)
place[:latitude]=geocode[:latitude]
place[:longitude]=geocode[:longitude]
end
#place the result in the session so we can use it for display
session[:places] = places
#let the user know the lookup went ok
render :text=> 'Looked up the geocodes for '+places.length.to_s+ '
address and stored the result in the session . . .'
end
def show_google_map
# all we're going to do is loop through the @places array on the page
@places=session[:places]
end
private
def get_geocode(address)
logger.debug 'starting geocoder call for address: '+address
# this is where we call the geocoding web service
server = XMLRPC::Client.new2('http://rpc.geocoder.us/service/xmlrpc')
result = server.call2('geocode', address)
logger.debug "Geocode call: "+result.inspect
return {:success=> true, :latitude=> result[1][0]['lat'],
:longitude=> result[1][0]['long']}
end
end
Der Fehler ist (NIL):
You have a nil object when you didn't expect it!
You might have expected an instance of Array.
The error occurred while evaluating nil.[]
Und die Logfiles vom Server steigen in Zeile 49 vom Controller Sandbox
aus:
return {:success=> true, :latitude=> result[1][0]['lat'],
:longitude=> result[1][0]['long']}
Also scheint er mit die Adresse nicht zu finden. Die anderen Adresse,
die ich ausgeklammert habe, findet er ohne Probleme. Auch ein Beispiel
mit Brandenburgerstrasse, Hameln, Germany findet er nicht.
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