emp = LogCategory（）
得到传过来的title的数据<br>from.title.data
model默认值为空<br><br>把form值塞给user：<br> form.populate_obj(user)
<div> def post(self):</div><div> form = UserRegisterForm(request.form)</div><div> if form.validate_on_submit():</div><div> user=User()</div><div> form.populate_obj(user)</div><div> db.session.add(user)</div><div> db.session.commit()</div><div> return redirect(url_for('.login'))</div><div> return render_template('register.html', form=form)</div>
