图片上传,评论系统

article/migrations/0006_avatar_article_avatar.py

@@ -0,0 +1,26 @@
+# Generated by Django 4.1.1 on 2022-09-23 22:51
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('article', '0005_rename_tag_article_tags'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='Avatar',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('content', models.ImageField(upload_to='avatar/%Y%m%d')),
+            ],
+        ),
+        migrations.AddField(
+            model_name='article',
+            name='avatar',
+            field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.SET_NULL, related_name='articles', to='article.avatar'),
+        ),
+    ]

article/migrations/0007_alter_article_avatar.py

@@ -0,0 +1,19 @@
+# Generated by Django 4.1.1 on 2022-09-23 23:57
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('article', '0006_avatar_article_avatar'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='article',
+            name='avatar',
+            field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.SET_NULL, related_name='article', to='article.avatar'),
+        ),
+    ]

article/models.py

@@ -28,6 +28,11 @@ class Tag(models.Model):
         return self.text
 
 
+class Avatar(models.Model):
+    """标题图"""
+    content = models.ImageField(upload_to='avatar/%Y%m%d')
+
+
 # 博客文章 model
 class Article(models.Model):
     class Meta:
@@ -59,6 +64,15 @@ class Article(models.Model):
         related_name='articles',
     )
 
+    # 标题图
+    avatar = models.ForeignKey(
+        Avatar,
+        null=True,
+        blank=True,
+        on_delete=models.SET_NULL,
+        related_name='article'  # 这里是1对1关系
+    )
+
     # 标题
     title = models.CharField(max_length=100)
     # 正文

article/permissions.py

@@ -1,4 +1,5 @@
 from rest_framework import permissions
+from rest_framework.permissions import BasePermission, SAFE_METHODS
 
 
 class IsAdminUserOrReadOnly(permissions.BasePermission):
@@ -14,3 +15,6 @@ class IsAdminUserOrReadOnly(permissions.BasePermission):
         # 仅管理员可进行其他操作
         return request.user.is_superuser
 
+
+
+

article/serializers.py

@@ -1,7 +1,7 @@
 from rest_framework import serializers
-from article.models import Article, Category, Tag
+from article.models import Article, Category, Tag, Avatar
 from user_info.serializers import UserDescSerializer
-
+from comment.serializers import CommentSerializer
 
 class CategorySerializer(serializers.ModelSerializer):
     """所有分类的序列化器"""
@@ -16,6 +16,14 @@ class CategorySerializer(serializers.ModelSerializer):
         read_only_fields = ['created']
 
 
+class AvatarSerializer(serializers.ModelSerializer):
+    url = serializers.HyperlinkedIdentityField(view_name='avatar-detail')
+
+    class Meta:
+        model = Avatar
+        fields = '__all__'
+
+
 class ArticleBaseSerializer(serializers.HyperlinkedModelSerializer):
     """将原来的ArticleSerializer抽象出一个父类"""
     author = UserDescSerializer(read_only=True)
@@ -32,10 +40,45 @@ class ArticleBaseSerializer(serializers.HyperlinkedModelSerializer):
         slug_field='text',
     )
 
+    # 图片字段
+    avatar = AvatarSerializer(read_only=True)
+    avatar_id = serializers.IntegerField(
+        write_only=True,
+        allow_null=True,
+        required=False,
+    )
+
+    # 自定义错误信息
+    default_error_messages = {
+        'incorrect_avatar_id': 'Avatar with id {value} not exists.',
+        'incorrect_category_id': 'Category with id {value} not exists.',
+        'default': 'No more message here..'
+    }
+
+    def check_obj_exists_or_fail(self, model, value, message='default'):
+        if not self.default_error_messages.get(message, None):
+            message = 'default'
+        # 不为None但是不存在该id返回错误信息
+        if not model.objects.filter(id=value).exists() and value is not None:
+            # 若不存在则调用钩子方法fail()引发错误
+            self.fail(message, value=value)
+
+    # 验证图片id是否正确
+    def validate_avatar_id(self, value):
+        self.check_obj_exists_or_fail(
+            model=Avatar,
+            value=value,
+            message='incorrect_avatar_id'
+        )
+        return value
+
     # 验证category_id是否正确
     def validate_category_id(self, value):
-        if not Category.objects.filter(id=value).exists() and value is not None:
-            raise serializers.ValidationError("Category with id {} not exist.".format(value))
+        self.check_obj_exists_or_fail(
+            model=Category,
+            value=value,
+            message='incorrect_category_id'
+        )
         return value
 
     def to_internal_value(self, data):
@@ -58,6 +101,8 @@ class ArticleSerializer(ArticleBaseSerializer):
 
 
 class ArticleDetailSerializer(ArticleBaseSerializer):
+    id = serializers.IntegerField(read_only=True)
+    comments = CommentSerializer(many=True, read_only=True)
     # 渲染后的正文
     body_html = serializers.SerializerMethodField()
     # 渲染后的目录
@@ -102,10 +147,10 @@ class CategoryDetailSerializer(serializers.ModelSerializer):
 
 
 class TagSerializer(serializers.ModelSerializer):
+    """所有标签序列化器"""
     # 显示url
     # url = serializers.HyperlinkedIdentityField(view_name='tag-detail')
 
-    """所有标签序列化器"""
 
     class Meta:
         model = Tag
@@ -126,3 +171,4 @@ class TagSerializer(serializers.ModelSerializer):
         return super(TagSerializer, self).update(instance, validated_data)
 
 
+

article/views.py

@@ -1,7 +1,7 @@
 from rest_framework import viewsets
 from article.serializers import ArticleSerializer, CategorySerializer, CategoryDetailSerializer
-from article.serializers import TagSerializer,ArticleDetailSerializer
-from article.models import Article, Category, Tag
+from article.serializers import TagSerializer,ArticleDetailSerializer, AvatarSerializer
+from article.models import Article, Category, Tag , Avatar
 from article.permissions import IsAdminUserOrReadOnly
 from rest_framework.filters import SearchFilter
 
@@ -47,4 +47,11 @@ class TagViewSet(viewsets.ModelViewSet):
     """标签视图集"""
     queryset = Tag.objects.all()
     serializer_class = TagSerializer
-    permission_classes = [IsAdminUserOrReadOnly]
+    permission_classes = [IsAdminUserOrReadOnly]
+
+
+class AvatarViewSet(viewsets.ModelViewSet):
+    """标题图片视图集"""
+    queryset = Avatar.objects.all()
+    serializer_class = AvatarSerializer
+    permission_classes = [IsAdminUserOrReadOnly]

comment/admin.py

@@ -0,0 +1,3 @@
+from django.contrib import admin
+
+# Register your models here.

comment/apps.py

@@ -0,0 +1,6 @@
+from django.apps import AppConfig
+
+
+class CommentConfig(AppConfig):
+    default_auto_field = 'django.db.models.BigAutoField'
+    name = 'comment'

comment/migrations/0001_initial.py

@@ -0,0 +1,32 @@
+# Generated by Django 4.1.1 on 2022-09-23 23:57
+
+from django.conf import settings
+from django.db import migrations, models
+import django.db.models.deletion
+import django.utils.timezone
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = [
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+        ('article', '0007_alter_article_avatar'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='Comment',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('content', models.TextField()),
+                ('created', models.DateTimeField(default=django.utils.timezone.now)),
+                ('article', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='comments', to='article.article')),
+                ('author', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='comments', to=settings.AUTH_USER_MODEL)),
+            ],
+            options={
+                'ordering': ['-created'],
+            },
+        ),
+    ]

comment/models.py

@@ -0,0 +1,30 @@
+from django.db import models
+from django.utils import timezone
+from article.models import Article
+from django.contrib.auth.models import User
+
+
+class Comment(models.Model):
+    # 评论人
+    author = models.ForeignKey(
+        User,
+        on_delete=models.CASCADE,
+        related_name='comments',
+    )
+    # 文章
+    article = models.ForeignKey(
+        Article,
+        on_delete=models.CASCADE,
+        related_name='comments',
+    )
+    # 评论内容
+    content = models.TextField()
+    # 评论时间
+    created = models.DateTimeField(default=timezone.now)
+
+    class Meta:
+        ordering = ['-created']
+
+    def __str__(self):
+        # 展示前20个字符
+        return self.content[:20]

comment/permissions.py

@@ -0,0 +1,26 @@
+from rest_framework.permissions import BasePermission, SAFE_METHODS
+
+
+class IsOwnerOrReadOnly(BasePermission):
+    """
+    只有作者本人可以修改，其他人只能查看
+    """
+    message = "You must be the owner to update"
+
+    def safe_methods_or_owner(self, request, func):
+        if request.method in SAFE_METHODS:
+            return True
+        return func()
+
+    def has_permission(self, request, view):
+        return self.safe_methods_or_owner(
+            request,
+            lambda: request.user.is_authenticated
+        )
+
+    def has_object_permission(self, request, view, obj):
+        return self.safe_methods_or_owner(
+            request,
+            lambda: obj.author == request.user  # 验证当前评论的作者和当前登录的用户是否为同一个人
+        )
+

comment/serializers.py

@@ -0,0 +1,15 @@
+from rest_framework import serializers
+from user_info.serializers import UserDescSerializer
+from comment.models import Comment
+
+
+class CommentSerializer(serializers.ModelSerializer):
+    """评论的序列化器"""
+    url = serializers.HyperlinkedIdentityField(view_name='comment-detail')
+    author = UserDescSerializer(read_only=True)
+
+    class Meta:
+        model = Comment
+        fields = '__all__'
+        extra_kwargs = {'created': {'read_only': True}}
+

comment/tests.py

@@ -0,0 +1,3 @@
+from django.test import TestCase
+
+# Create your tests here.

comment/views.py

@@ -0,0 +1,14 @@
+from rest_framework import viewsets
+
+from comment.models import Comment
+from comment.serializers import CommentSerializer
+from comment.permissions import IsOwnerOrReadOnly
+
+
+class CommentViewSet(viewsets.ModelViewSet):
+    queryset = Comment.objects.all()
+    serializer_class = CommentSerializer
+    permission_classes = [IsOwnerOrReadOnly]
+
+    def perform_create(self, serializer):
+        serializer.save(author=self.request.user)

drf_vue_blog/settings.py

@@ -1,5 +1,5 @@
 from pathlib import Path
-
+import os
 # Build paths inside the project like this: BASE_DIR / 'subdir'.
 BASE_DIR = Path(__file__).resolve().parent.parent
 
@@ -29,6 +29,7 @@ INSTALLED_APPS = [
     'article',
     'user_info',
     'django_filters',
+    'comment',
 ]
 
 MIDDLEWARE = [
@@ -115,11 +116,14 @@ STATIC_URL = '/static/'
 # 使用django_rest_framework中的分页功能
 REST_FRAMEWORK = {
     'DEFAULT_PAGINATION_CLASS': 'rest_framework.pagination.PageNumberPagination',
-    # 每页3条记录
-    'PAGE_SIZE': 3,
+    # 每页5条记录
+    'PAGE_SIZE': 5,
     # 使用django-filter后端过滤引擎
     'DEFAULT_FILTER_BACKENDS': ['django_filters.rest_framework.DjangoFilterBackend'],
 }
 
+# 媒体文件
+MEDIA_URL = '/media/'
+MEDIA_ROOT = os.path.join(BASE_DIR, 'media')
 
 DEFAULT_AUTO_FIELD = 'django.db.models.BigAutoField'

drf_vue_blog/urls.py

@@ -2,12 +2,16 @@ from django.contrib import admin
 from django.urls import path, include
 from rest_framework.routers import DefaultRouter
 from article import views
+from django.conf import settings
+from django.conf.urls.static import static
+from comment.views import CommentViewSet
 
 router = DefaultRouter()
 router.register(r'article', views.ArticleViewSet)
 router.register(r'category', views.CategoryViewSet)
 router.register(r'tag', views.TagViewSet)
-
+router.register(r'avatar', views.AvatarViewSet)
+router.register(r'comment', CommentViewSet)
 
 urlpatterns = [
     path('admin/', admin.site.urls),
@@ -15,3 +19,7 @@ urlpatterns = [
     path('api/', include(router.urls))
     # path('api/article/', include('article.urls', namespace='article')),
 ]
+
+# 把媒体文件的路由注册了
+if settings.DEBUG:
+    urlpatterns += static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT)