form表单（简写啦）
form.form-horizontal(method = "post", action = "/admin/movie/new", enctype="multipart/form-data")
.form-group
label.col-sm-2.control-label(for="uploadPoster") 海报上传
.col-sm-10
input#uploadPoster(type="file", name="uploadPoster")
路由
app.post('/admin/movie/new', Movie.savePoster, Movie.save);