ruby-on-rails – Geocoder rails,检查是否有效

以下是我使用地理编码器的课程.我无法检查通过地理编码器发送的地址是否有效.当我添加公司/编辑公司时,此代码非常有用,该公司的地址通过地理编码器提供经度和纬度.但是我需要代码才能工作,所以当用户试图在编辑或创建公司时放置一个不给出纬度和经度的地址时,会弹出一个错误并通知用户该地址无效.

模型

class Company < ActiveRecord::Base
    validates :name,presence: true,length: { maximum: 30 }
    validates :website,presence: true
    validates :address,presence: true
    validates :description,presence: true
    validates :primary_field,presence: true

    geocoded_by :address
    before_save :geocode,if: ->(obj){ obj.address.present? and obj.address_changed? }

    after_save :set_popup_value

    private

     ...

end

视图

<% provide(:title,'Add Company') %>
<h1>Add Company</h1>
<div class="row">
  <div class="span6 offset3">
    <%= form_for(@company) do |f| %>
      <%= render 'shared/error_messages' %>

      <%= f.label :name %>
      <%= f.text_field :name %>

      <%= f.label :website %>
      <%= f.text_field :website %>

      <%= f.label :primary_field %>
      <%= f.select :primary_field,@primary_field %>

      <%= f.label :address %>
      <%= f.text_field :address,:placeholder => '123 Test St,City State Zip'%>

      <%= f.label :description %>
      <%= f.text_area :description,:size => "30x5" %>

      <%= f.submit "Add Company",class: "btn btn-large btn-primary" %>
    <% end %>
  </div>
</div>

geocoded_by :address
after_validation :geocode,if: ->(obj){ obj.address.present? and obj.address_changed? }
after_validation :lat_changed?

after_save :set_popup_value

private

# This is used to make sure that our address is actually parsed properly and we
# get a valuable lat/long
def lat_changed?
    if (self.address_changed?)
        if !(self.latitude_changed?)
            self.errors.add(:address,"is not valid")
            return false
        end
    end
    return true
end