Allow user to pass in number of fire hydrants

app/controllers/hydrants_controller.rb

@@ -19,7 +19,7 @@ class HydrantsController < ApplicationController
   end
 
   def list
-    @hydrants = Hydrant.find_closest(params[:lat], params[:lng])
+    @hydrants = Hydrant.find_closest(params[:lat], params[:lng], params[:limit] || 50)
     unless @hydrants.blank?
       respond_with @hydrants
     else

app/models/hydrant.rb

@@ -8,7 +8,7 @@ class Hydrant < ActiveRecord::Base
       ORDER BY distance
       LIMIT ?
       SQL
-    Hydrant.find_by_sql([query, lat, lng, lat, limit])
+    Hydrant.find_by_sql([query, lat.to_f, lng.to_f, lat.to_f, limit.to_i])
   end
 
   def adopted?

app/views/main/index.html.haml

@@ -8,6 +8,7 @@
     = select_tag "city_state", '<option value="Boston, MA" selected="selected">Boston, MA</option>'.html_safe, :tabindex => 10
     = label_tag "address", "Address", :id => "address_label"
     = text_field_tag "address", params[:address], :tabindex => 11
+    = hidden_field_tag "limit", params[:limit] || 50
     = submit_tag "Find fire hydrants", :tabindex => 12
   #logos
     = image_tag "logos/cfa.png", :alt => "Code for America", :title => "Code for America"

public/javascripts/application.js

@@ -72,7 +72,8 @@ $(function() {
         'utf8': '✓',
         'authenticity_token': $('#address_form input[name="authenticity_token"]').val(),
         'lat': lat,
-        'lng': lng
+        'lng': lng,
+        'limit': $('#address_form input[name="limit"]').val()
       },
       success: function(data) {
         if(data.errors) {