populating associations in mongodb -
i'm new mean , mongodb , trying figure out how populate answers questions. changed words in platform i'm learning (examples posts , comments). here's error message i'm getting. /users/joerigby/documents/codingdojo/full mean/blacktest3/node_modules/express/lib/view.js:62 throw new error('no default engine specified , no extension prov ^ error: no default engine specified , no extension provided. @ new view (/users/joerigby/documents/codingdojo/full mean/blacktest3/node_modules/express/lib/view.js:62:11) @ eventemitter.render (/users/joerigby/documents/codingdojo/full mean/blacktest3/node_modules/express/lib/application.js:569:12) @ serverresponse.render (/users/joerigby/documents/codingdojo/full mean/blacktest3/node_modules/express/lib/response.js:961:7) @ /users/joerigby/documents/codingdojo/full mean/blacktest3/server/controllers/answers_c.js:53:12 @ query.<anonymous> (/users/joerigby/documents/codingdojo/full mean/blacktest3/node_modules/mongoo...