第 0023 题&＃xff1a; 使用 Python 的 Web 框架&＃xff0c;做一个 Web 版本 留言簿 应用。

运行服务器&＃xff1a;

python manage.py runserver

2.在settings中添加guestbook应用

3先设计models&＃xff0c;models.py

from django.db import models# Create your models here.
class Comment(models.Model):name &＃61; models.CharField("姓名",max_length&＃61;16)content &＃61; models.TextField("内容")pub &＃61; models.DateField("发布时间", auto_now_add&＃61;True)class Meta:verbose_name &＃61; "留言"verbose_name_plural &＃61; verbose_namedef __unicode__(self):return self.namedef __str__(self):return self.content


4.在admin.py中注册Comment

from django.contrib import admin
from .models import Comment# Register your models here.
class CommentAdmin(admin.ModelAdmin):list_display &＃61; (&＃39;name&＃39;,&＃39;content&＃39;,&＃39;pub&＃39;)admin.site.register(Comment,CommentAdmin)

5.迁移

python manage.py makemigrations
python manage.py migrate

6.编写forms.py

#encoding:utf-8from django import formsclass CommentForm(forms.Form):name &＃61; forms.CharField(label&＃61;"姓名",max_length&＃61;16,error_messages&＃61;{&＃39;required&＃39;:"请填写您的姓名","max_length":"姓名太长咯"})content &＃61; forms.CharField(label&＃61;"内容",widget&＃61;forms.Textarea())

7.在views.py编写请求数据方法&＃xff1a;

from django.shortcuts import render,HttpResponseRedirect,reverse
from .models import Comment
from .forms import CommentFormdef get_comments(request):comments &＃61; Comment.objects.all().order_by("-pub")if request.method &＃61;&＃61; "GET":form &＃61; CommentForm()else:form &＃61; CommentForm(request.POST)if form.is_valid():cleaned_data &＃61; form.cleaned_dataComment.objects.create(**cleaned_data)return HttpResponseRedirect(reverse(&＃39;get_comments&＃39;))ctx &＃61; {&＃39;comments&＃39;:comments,&＃39;form&＃39;:form}return render(request,"comment.html",ctx)

8.在urls.py中添加url&＃xff0c;这里的get_comments与上面views.py中对应

urlpatterns &＃61; [path(&＃39;admin/&＃39;, admin.site.urls),url(r&＃39;comment/&＃39;,get_comments,name&＃61;"get_comments"),
]

9.在guestbook目录下添加一个templates目录&＃xff0c;并创建一个comment.html

运行效果如下&＃xff1a;