set autoFocus to true for jquery autocomplete

app/assets/javascripts/plantings.js.coffee

@@ -17,8 +17,7 @@ jQuery ->
         el.val( ui.item.name )
         $( '#planting_crop_id' ).val( ui.item.id )
         false
-      change: ( event, ui ) ->
-        console.log( event, ui )
+      autoFocus: true
     .data( 'uiAutocomplete' )._renderItem = ( ul, item ) ->
       $( '<li></li>' )
         .data( 'item.autocomplete', item )

app/models/planting.rb

@@ -23,6 +23,8 @@ class Planting < ActiveRecord::Base
 
   default_scope order("created_at desc")
 
+  validates :crop_id, :presence => true
+
   validates :quantity,
     :numericality => { :only_integer => true },
     :allow_nil => true