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Editorial Team
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Asked: 2026-06-14T23:50:54+00:00

I am using the geocoder gem’s .nearby method to query my DB and return

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I am using the geocoder gem’s .nearby method to query my DB and return nearby location objects.

Question 1: When loading the map for the first time, no markers are passed to the JS, and it does not load the map. How can I fix this issue without loading a marker?

<script type="text/javascript">
Gmaps.map = new Gmaps4RailsGoogle();
Gmaps.load_map = function() {
Gmaps.map.map_options.detect_location = true;
Gmaps.map.map_options.center_on_user = true;
Gmaps.map.initialize();
Gmaps.map.markers = ; // BLOWS UP HERE
Gmaps.map.markers_conf.list_container = "markers_list";
Gmaps.map.create_markers();
Gmaps.map.adjustMapToBounds();
Gmaps.map.callback();
};
Gmaps.oldOnload = window.onload;
 window.onload = function() { Gmaps.triggerOldOnload(); Gmaps.loadMaps(); };
</script>`

Question 2: When user searches and no nearby results are available to their search, how to recover from this just showing a random location (right now it loads the middle of the ocean).

Question 3: When user searches and no nearby results are available, can I show nearby locations to their current location using browser geolocation (I know it’s not supported in all browsers).

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1 Answer

  1. Editorial Team

    Answer 1:

    There is no bug in the gem.

    This line of yours makes javascript cry:

    @json = nil

    Indeed nil isn’t valid json.

    You should do:

    @json = [].to_json

    Answer 2

    If your query doesn’t return anything, Make another one to get a random object. Can’t see any problem there.

    Answer 3

    Geolocation from browser is included in the gem, you even have a callback on success. See code. But you’ll have to write your own javascript fitting your own logic.

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