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import logging
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import re
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from abc import abstractmethod
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from django.conf import settings
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from django.core.exceptions import ValidationError
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from django.db import models
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from django.urls import reverse
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from django.utils.timezone import now
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from django.utils.translation import gettext_lazy as _
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from mdeditor.fields import MDTextField
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from uuslug import slugify
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from djangoblog.utils import cache_decorator, cache
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from djangoblog.utils import get_current_site
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logger = logging.getLogger(__name__)
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class LinkShowType(models.TextChoices):
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"""
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链接显示类型选择
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定义友情链接在网站中的显示位置
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"""
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I = ('i', _('index'))
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L = ('l', _('list'))
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P = ('p', _('post'))
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A = ('a', _('all'))
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S = ('s', _('slide'))
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class BaseModel(models.Model):
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"""
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基础模型类
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所有模型的基类，提供公共字段和方法
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"""
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id = models.AutoField(primary_key=True)
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creation_time = models.DateTimeField(_('creation time'), default=now)
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last_modify_time = models.DateTimeField(_('modify time'), default=now)
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def save(self, *args, **kwargs):
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"""
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重写保存方法
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处理文章浏览量更新和自动生成slug
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"""
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is_update_views = isinstance(
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self,
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Article) and 'update_fields' in kwargs and kwargs['update_fields'] == ['views']
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if is_update_views:
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Article.objects.filter(pk=self.pk).update(views=self.views)
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else:
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if 'slug' in self.__dict__:
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slug = getattr(
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self, 'title') if 'title' in self.__dict__ else getattr(
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self, 'name')
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setattr(self, 'slug', slugify(slug))
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super().save(*args, **kwargs)
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def get_full_url(self):
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"""获取完整的URL地址（包含域名）"""
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site = get_current_site().domain
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url = "https://{site}{path}".format(site=site,
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path=self.get_absolute_url())
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return url
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class Meta:
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abstract = True
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@abstractmethod
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def get_absolute_url(self):
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"""抽象方法：获取对象的绝对URL"""
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pass
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class Article(BaseModel):
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"""
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文章模型
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博客系统的核心模型，存储所有文章内容
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"""
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STATUS_CHOICES = (
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('d', _('Draft')),
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('p', _('Published')),
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)
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COMMENT_STATUS = (
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('o', _('Open')),
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('c', _('Close')),
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)
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TYPE = (
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('a', _('Article')),
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('p', _('Page')),
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)
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title = models.CharField(_('title'), max_length=200, unique=True)
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body = MDTextField(_('body'))
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pub_time = models.DateTimeField(
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_('publish time'), blank=False, null=False, default=now)
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status = models.CharField(
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_('status'),
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max_length=1,
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choices=STATUS_CHOICES,
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default='p')
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comment_status = models.CharField(
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_('comment status'),
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max_length=1,
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choices=COMMENT_STATUS,
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default='o')
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type = models.CharField(_('type'), max_length=1, choices=TYPE, default='a')
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views = models.PositiveIntegerField(_('views'), default=0)
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author = models.ForeignKey(
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settings.AUTH_USER_MODEL,
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verbose_name=_('author'),
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blank=False,
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null=False,
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on_delete=models.CASCADE)
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article_order = models.IntegerField(
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_('order'), blank=False, null=False, default=0)
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show_toc = models.BooleanField(_('show toc'), blank=False, null=False, default=False)
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category = models.ForeignKey(
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'Category',
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verbose_name=_('category'),
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on_delete=models.CASCADE,
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blank=False,
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null=False)
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tags = models.ManyToManyField('Tag', verbose_name=_('tag'), blank=True)
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def body_to_string(self):
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"""将文章内容转换为字符串"""
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return self.body
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def __str__(self):
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"""对象的字符串表示"""
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return self.title
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class Meta:
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ordering = ['-article_order', '-pub_time']
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verbose_name = _('article')
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verbose_name_plural = verbose_name
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get_latest_by = 'id'
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def get_absolute_url(self):
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"""获取文章的绝对URL"""
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return reverse('blog:detailbyid', kwargs={
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'article_id': self.id,
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'year': self.creation_time.year,
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'month': self.creation_time.month,
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'day': self.creation_time.day
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})
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@cache_decorator(60 * 60 * 10)
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def get_category_tree(self):
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"""获取文章所属分类的树形结构"""
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tree = self.category.get_category_tree()
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names = list(map(lambda c: (c.name, c.get_absolute_url()), tree))
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return names
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def save(self, *args, **kwargs):
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"""保存文章"""
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super().save(*args, **kwargs)
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def viewed(self):
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"""增加文章浏览量"""
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self.views += 1
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self.save(update_fields=['views'])
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def comment_list(self):
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"""获取文章评论列表（带缓存）"""
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cache_key = 'article_comments_{id}'.format(id=self.id)
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value = cache.get(cache_key)
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if value:
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logger.info('get article comments:{id}'.format(id=self.id))
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return value
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else:
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comments = self.comment_set.filter(is_enable=True).order_by('-id')
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cache.set(cache_key, comments, 60 * 100)
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logger.info('set article comments:{id}'.format(id=self.id))
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return comments
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def get_admin_url(self):
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"""获取文章在Admin后台的URL"""
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info = (self._meta.app_label, self._meta.model_name)
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return reverse('admin:%s_%s_change' % info, args=(self.pk,))
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@cache_decorator(expiration=60 * 100)
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def next_article(self):
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"""获取下一篇文章"""
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return Article.objects.filter(
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id__gt=self.id, status='p').order_by('id').first()
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@cache_decorator(expiration=60 * 100)
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def prev_article(self):
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"""获取上一篇文章"""
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return Article.objects.filter(id__lt=self.id, status='p').first()
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def get_first_image_url(self):
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"""
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从文章内容中提取第一张图片的URL
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用于文章列表的缩略图显示
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"""
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match = re.search(r'!\[.*?\]\((.+?)\)', self.body)
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if match:
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return match.group(1)
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return ""
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class Category(BaseModel):
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"""
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文章分类模型
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用于组织和管理博客文章的类别，支持多级分类结构
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"""
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name = models.CharField(_('category name'), max_length=30, unique=True)
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parent_category = models.ForeignKey(
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'self',
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verbose_name=_('parent category'),
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blank=True,
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null=True,
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on_delete=models.CASCADE)
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slug = models.SlugField(default='no-slug', max_length=60, blank=True)
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index = models.IntegerField(default=0, verbose_name=_('index'))
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class Meta:
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"""
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分类模型的元数据配置
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"""
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ordering = ['-index']
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verbose_name = _('category')
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verbose_name_plural = verbose_name
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def get_absolute_url(self):
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"""
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获取分类的绝对URL地址
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用于在模板中生成分类页面的链接
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Returns:
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str: 分类详情页的URL
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"""
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return reverse(
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'blog:category_detail', kwargs={
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'category_name': self.slug})
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def __str__(self):
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"""
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对象的字符串表示
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在admin后台和shell中显示的分类名称
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Returns:
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str: 分类名称
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"""
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return self.name
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@cache_decorator(60 * 60 * 10)
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def get_category_tree(self):
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"""
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递归获得分类目录的父级
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返回从当前分类到根分类的路径
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"""
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categorys = []
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def parse(category):
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categorys.append(category)
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if category.parent_category:
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parse(category.parent_category)
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parse(self)
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return categorys
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@cache_decorator(60 * 60 * 10)
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def get_sub_categorys(self):
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"""
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获得当前分类目录所有子集
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返回所有子分类的列表
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"""
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categorys = []
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all_categorys = Category.objects.all()
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def parse(category):
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if category not in categorys:
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categorys.append(category)
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childs = all_categorys.filter(parent_category=category)
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for child in childs:
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if category not in categorys:
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categorys.append(child)
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parse(child)
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parse(self)
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return categorys
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class Tag(BaseModel):
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"""文章标签模型"""
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name = models.CharField(_('tag name'), max_length=30, unique=True)
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slug = models.SlugField(default='no-slug', max_length=60, blank=True)
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def __str__(self):
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return self.name
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def get_absolute_url(self):
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"""获取标签的绝对URL"""
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return reverse('blog:tag_detail', kwargs={'tag_name': self.slug})
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@cache_decorator(60 * 60 * 10)
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def get_article_count(self):
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"""获取该标签下的文章数量"""
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return Article.objects.filter(tags__name=self.name).distinct().count()
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class Meta:
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ordering = ['name']
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verbose_name = _('tag')
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verbose_name_plural = verbose_name
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class Links(models.Model):
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"""友情链接"""
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name = models.CharField(_('link name'), max_length=30, unique=True)
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link = models.URLField(_('link'))
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sequence = models.IntegerField(_('order'), unique=True)
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is_enable = models.BooleanField(
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_('is show'), default=True, blank=False, null=False)
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show_type = models.CharField(
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_('show type'),
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max_length=1,
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choices=LinkShowType.choices,
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default=LinkShowType.I)
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creation_time = models.DateTimeField(_('creation time'), default=now)
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last_mod_time = models.DateTimeField(_('modify time'), default=now)
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class Meta:
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ordering = ['sequence']
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verbose_name = _('link')
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verbose_name_plural = verbose_name
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def __str__(self):
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return self.name
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class SideBar(models.Model):
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"""侧边栏,可以展示一些html内容"""
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name = models.CharField(_('title'), max_length=100)
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content = models.TextField(_('content'))
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sequence = models.IntegerField(_('order'), unique=True)
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is_enable = models.BooleanField(_('is enable'), default=True)
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creation_time = models.DateTimeField(_('creation time'), default=now)
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last_mod_time = models.DateTimeField(_('modify time'), default=now)
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class Meta:
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ordering = ['sequence']
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verbose_name = _('sidebar')
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verbose_name_plural = verbose_name
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def __str__(self):
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return self.name
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class BlogSettings(models.Model):
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"""博客全局配置模型"""
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site_name = models.CharField(
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_('site name'),
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max_length=200,
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null=False,
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blank=False,
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default='')
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site_description = models.TextField(
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_('site description'),
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max_length=1000,
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null=False,
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blank=False,
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default='')
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site_seo_description = models.TextField(
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_('site seo description'), max_length=1000, null=False, blank=False, default='')
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site_keywords = models.TextField(
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_('site keywords'),
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max_length=1000,
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null=False,
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blank=False,
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default='')
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article_sub_length = models.IntegerField(_('article sub length'), default=300)
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sidebar_article_count = models.IntegerField(_('sidebar article count'), default=10)
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sidebar_comment_count = models.IntegerField(_('sidebar comment count'), default=5)
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article_comment_count = models.IntegerField(_('article comment count'), default=5)
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show_google_adsense = models.BooleanField(_('show adsense'), default=False)
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google_adsense_codes = models.TextField(
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_('adsense code'), max_length=2000, null=True, blank=True, default='')
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open_site_comment = models.BooleanField(_('open site comment'), default=True)
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global_header = models.TextField("公共头部", null=True, blank=True, default='')
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global_footer = models.TextField("公共尾部", null=True, blank=True, default='')
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beian_code = models.CharField(
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'备案号',
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max_length=2000,
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null=True,
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blank=True,
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default='')
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analytics_code = models.TextField(
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"网站统计代码",
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max_length=1000,
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null=False,
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blank=False,
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default='')
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show_gongan_code = models.BooleanField(
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'是否显示公安备案号', default=False, null=False)
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gongan_beiancode = models.TextField(
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'公安备案号',
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max_length=2000,
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null=True,
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blank=True,
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default='')
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comment_need_review = models.BooleanField(
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'评论是否需要审核', default=False, null=False)
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class Meta:
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verbose_name = _('Website configuration')
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verbose_name_plural = verbose_name
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def __str__(self):
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return self.site_name
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def clean(self):
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"""验证配置唯一性，确保只有一个配置实例"""
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if BlogSettings.objects.exclude(id=self.id).count():
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raise ValidationError(_('There can only be one configuration'))
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def save(self, *args, **kwargs):
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"""保存配置并清除缓存"""
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super().save(*args, **kwargs)
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from djangoblog.utils import cache
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cache.clear()
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