Revert "Replace usage of request.fullpath / request.referrer with obj…

…ect entity approach."

This reverts commit c51da14.

app/helpers/application_helper.rb

@@ -126,12 +126,13 @@ def link_to_delete(record, options = {})
 
   #----------------------------------------------------------------------------
   def link_to_discard(object)
-    if entity.present?
-      link_to(t(:discard),
-        url_for(controller: entity.class.to_s.tableize, action: 'discard', id: entity.id, attachment: object.class.name, attachment_id: object.id),
-        method:  :post,
-        remote:  true)
-    end
+    current_url = (request.xhr? ? request.referer : request.fullpath)
+    parent, parent_id = current_url.scan(%r{/(\w+)/(\d+)}).flatten
+
+    link_to(t(:discard),
+            url_for(controller: parent, action: :discard, id: parent_id, attachment: object.class.name, attachment_id: object.id),
+            method:  :post,
+            remote:  true)
   end
 
   #----------------------------------------------------------------------------

spec/helpers/application_helper_spec.rb

@@ -35,18 +35,13 @@
     end
   end
 
-  describe "link_to_discard" do
-    let(:contact) { create(:contact) }
-    let(:opportunity) { create(:opportunity) }
-    before do
-      contact.opportunities << opportunity
-      allow(helper).to receive(:entity).and_return(contact)
-    end
-    it do
-      link = helper.link_to_discard(opportunity)
-      expect(link).to match(%r{contacts/#{contact.id}/discard})
-      expect(link).to match(/attachment=Opportunity&amp;attachment_id=#{opportunity.id}/)
-    end
+  it "link_to_discard" do
+    lead = create(:lead)
+    allow(controller.request).to receive(:fullpath).and_return("http://www.example.com/leads/#{lead.id}")
+
+    link = helper.link_to_discard(lead)
+    expect(link).to match(%r{leads/#{lead.id}/discard})
+    expect(link).to match(/attachment=Lead&amp;attachment_id=#{lead.id}/)
   end
 
   describe "shown_on_landing_page?" do