ca master -master (ll_env)learning_logwe issue the git add command at because we created some new files in the projectso we need to tell git to start tracking these files then we commit the changes and push the updated project to heroku now when an error page appearsit should have the same styling as the rest of the sitemaking for smoother user experience when errors arise using the get_object_or_ (method at this pointif user manually requests topic or entry that doesn' existthey'll get server error django tries to render the page but it doesn' have enough information to do soand the result is error this situation is more accurately handled as errorand we can implement this behavior with the django shortcut function get_object_or_ (this function tries to get the requested object from the databasebut if that object doesn' existit raises exception we'll import this function into views py and use it in place of get()views py --snip-from django shortcuts import renderget_object_or_ from django http import httpresponseredirecthttp --snip-@login_required def topic(requesttopic_id)"""show single topic and all its entries ""topic get_object_or_ (topicid=topic_idmake sure the topic belongs to the current user --snip-now when you request topic that doesn' exist (for examplelocalhost: /topics/ /)you'll see error page to deploy this changemake new commitand then push the project to heroku ongoing development you might want to further develop learning log after your initial push to live server or develop your own projects to deploy there' fairly consistent process for updating projects firstyou'll make any changes needed to your local project if your changes result in any new filesadd those files to the git repository using the command git add (be sure to include the dot at the end of the commandany change that requires database migration will need this commandbecause each migration generates new migration file then commit the changes to your repository using git commit -am "commit messagethereafterpush your changes to heroku using the command git push heroku master if you migrated your database locallyyou'll need to migrate the live database as well you can either use the one-off