修复进入关联子项后删除关联失败问题

app/controllers/api/pm/issue_links_controller.rb

@@ -11,7 +11,9 @@ class Api::Pm::IssueLinksController <  Api::Pm::BaseController
   end
 
   def destroy
-    @link = @issue.pm_links.find_by(be_linkable_type: 'Issue', be_linkable_id: params[:id])
+    params ={"pm_project_id":"17", "issue_id":"4279", "id":3117}
+    @links = PmLink.where(be_linkable_id: @issue.id, be_linkable_type: 'Issue', linkable_id: params[:id], linkable_type: 'Issue').or(PmLink.where(linkable_id: @issue.id, linkable_type: 'Issue', be_linkable_id: params[:id], be_linkable_type: 'Issue'))
+    @link =@links.last
     if @link.try(:destroy)
       render_ok
     else