如何从 model+ModelForm 获取文本区域？

模型.py=>

from django.db import models
from django.forms import ModelForm
from datetime import date
import datetime
from django import forms
from django.forms import Textarea

class Post(models.Model):
    title = models.CharField(max_length=100)
    content = models.TextField()
    created = models.DateField(auto_now_add=True)
    modified = models.DateField(auto_now_add=True)

    def __unicode__(self):
        return self.title

class PostModelForm(ModelForm):
    class Meta:
        model = Post

但我得到的是文本输入而不是文本区域models.TextField()。这是css的原因吗？

我认为这section https://docs.djangoproject.com/en/1.11/topics/forms/modelforms/#overriding-the-default-fields文档中的内容应该有助于解决问题。

from django.forms import ModelForm, Textarea

class PostModelForm(ModelForm):
    class Meta:
        model = Post
        widgets = {
            'content': Textarea(attrs={'cols': 80, 'rows': 20}),
        }