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from django.conf import settings
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from django.db import models
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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 blog.models import Article
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#zr 评论数据模型
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class Comment(models.Model):
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#zr 评论正文，最大长度300字符
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body = models.TextField('正文', max_length=300)
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#zr 评论创建时间，默认为当前时间
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creation_time = models.DateTimeField(_('creation time'), default=now)
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#zr 评论最后修改时间，默认为当前时间
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last_modify_time = models.DateTimeField(_('last modify time'), default=now)
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#zr 评论作者，关联用户模型
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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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on_delete=models.CASCADE)
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#zr 关联的文章
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article = models.ForeignKey(
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Article,
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verbose_name=_('article'),
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on_delete=models.CASCADE)
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#zr 父级评论，支持评论回复功能
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parent_comment = models.ForeignKey(
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'self',
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verbose_name=_('parent comment'),
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blank=True,
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null=True,
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on_delete=models.CASCADE)
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#zr 评论是否启用显示
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is_enable = models.BooleanField(_('enable'),
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default=False, blank=False, null=False)
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class Meta:
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#zr 按ID降序排列
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ordering = ['-id']
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#zr 设置单数和复数显示名称
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verbose_name = _('comment')
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verbose_name_plural = verbose_name
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#zr 指定最新记录的依据字段
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get_latest_by = 'id'
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def __str__(self):
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#zr 返回评论正文作为字符串表示
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return self.body
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