什么错误会导致rails重定向回到表单而不写入数据库

I have a controller called Template Controller, generated from a scaffold and it saves a simple template model to a mongo database, and for some reason I keep getting this problem: When I go to save in the template/new view, it doesn't save to the database, returning a 'Review the problems below" (in the style as if I had left something blank). Sorry if I've left out any important info, let me know if I need anything else. I've been stumped on this one for hours today!I have a controller called Template Controller,