创建博客 | EmDash CMS Everything

本指南涵盖使用 EmDash 创建博客的全过程，从定义内容类型到使用分类和标签展示文章。

前提条件

已设置并运行的 EmDash 站点（参见快速入门）
对 Astro 组件的基本了解

定义 Posts Collection

EmDash 在设置过程中会创建一个默认的 “posts” collection。您可以通过管理面板或 API 进行自定义。

默认的 posts collection 包含：

title - 文章标题
slug - URL 友好的标识符
content - 富文本正文
excerpt - 简短描述
featured_image - 头图（可选）
status - 草稿、已发布或已计划
publishedAt - 发布日期（系统字段）

创建您的第一篇文章

在 /_emdash/admin 打开管理面板
点击侧边栏中的 Posts
点击 New Post
输入标题并使用富文本编辑器撰写内容
在侧边栏面板中添加分类和标签
将状态设置为已发布
点击保存

文章现已上线并立即显示。

在站点上展示文章

列出所有文章

以下页面展示所有已发布的文章：

---
import { getEmDashCollection } from "emdash";
import Base from "../../layouts/Base.astro";

const { entries: posts } = await getEmDashCollection("posts", {
  status: "published",
});

// 按发布日期排序，最新的在前
const sortedPosts = posts.sort(
  (a, b) => (b.data.publishedAt?.getTime() ?? 0) - (a.data.publishedAt?.getTime() ?? 0)
);
---

<Base title="博客">
  <h1>博客</h1>
  <ul>
    {sortedPosts.map((post) => (
      <li>
        <a href={`/blog/${post.data.slug}`}>
          <h2>{post.data.title}</h2>
          <p>{post.data.excerpt}</p>
          <time datetime={post.data.publishedAt?.toISOString()}>
            {post.data.publishedAt?.toLocaleDateString()}
          </time>
        </a>
      </li>
    ))}
  </ul>
</Base>

展示单篇文章

以下动态路由渲染单篇文章：

---
import { getEmDashCollection, getEmDashEntry } from "emdash";
import { PortableText, Image } from "emdash/ui";
import Base from "../../layouts/Base.astro";

export async function getStaticPaths() {
  const { entries: posts } = await getEmDashCollection("posts", {
    status: "published",
  });

  return posts.map((post) => ({
    params: { slug: post.data.slug },
  }));
}

const { slug } = Astro.params;
const { entry: post } = await getEmDashEntry("posts", slug);

if (!post) {
  return Astro.redirect("/404");
}
---

<Base title={post.data.title}>
  <article>
    {post.data.featured_image && (
      <Image image={post.data.featured_image} alt="" />
    )}
    <h1>{post.data.title}</h1>
    <time datetime={post.data.publishedAt?.toISOString()}>
      {post.data.publishedAt?.toLocaleDateString()}
    </time>
    <PortableText value={post.data.content} />
  </article>
</Base>

添加分类和标签

EmDash 包含内置的分类和标签分类法。有关创建和管理术语的详情，请参见分类法。

按分类筛选文章

以下路由列出单个分类下的文章：

---
import { getEmDashCollection, getTerm, getTaxonomyTerms } from "emdash";
import Base from "../../layouts/Base.astro";

export async function getStaticPaths() {
  const categories = await getTaxonomyTerms("category");

  // 展平层级分类
  const flatten = (terms) => terms.flatMap((t) => [t, ...flatten(t.children)]);

  return flatten(categories).map((cat) => ({
    params: { slug: cat.slug },
    props: { category: cat },
  }));
}

const { category } = Astro.props;

const { entries: posts } = await getEmDashCollection("posts", {
  status: "published",
  where: { category: category.slug },
});
---

<Base title={category.label}>
  <h1>{category.label}</h1>
  {category.description && <p>{category.description}</p>}

  <ul>
    {posts.map((post) => (
      <li>
        <a href={`/blog/${post.data.slug}`}>{post.data.title}</a>
      </li>
    ))}
  </ul>
</Base>

展示文章分类

以下组件显示分配给文章的分类和标签：

---
import { getEntryTerms } from "emdash";

interface Props {
  postId: string;
}

const { postId } = Astro.props;
const categories = await getEntryTerms("posts", postId, "category");
const tags = await getEntryTerms("posts", postId, "tag");
---

<div class="post-meta">
  {categories.length > 0 && (
    <div class="categories">
      <span>分类：</span>
      {categories.map((cat) => (
        <a href={`/category/${cat.slug}`}>{cat.label}</a>
      ))}
    </div>
  )}

  {tags.length > 0 && (
    <div class="tags">
      <span>标签：</span>
      {tags.map((tag) => (
        <a href={`/tag/${tag.slug}`}>{tag.label}</a>
      ))}
    </div>
  )}
</div>

添加分页

对于文章较多的博客，以下路由对文章列表进行分页：

---
import { getEmDashCollection } from "emdash";
import Base from "../../../layouts/Base.astro";

const POSTS_PER_PAGE = 10;

export async function getStaticPaths() {
  const { entries: allPosts } = await getEmDashCollection("posts", {
    status: "published",
  });

  const totalPages = Math.ceil(allPosts.length / POSTS_PER_PAGE);

  return Array.from({ length: totalPages }, (_, i) => ({
    params: { page: String(i + 1) },
    props: { currentPage: i + 1, totalPages },
  }));
}

const { currentPage, totalPages } = Astro.props;

const { entries: allPosts } = await getEmDashCollection("posts", {
  status: "published",
});

const sortedPosts = allPosts.sort(
  (a, b) => (b.data.publishedAt?.getTime() ?? 0) - (a.data.publishedAt?.getTime() ?? 0)
);

const start = (currentPage - 1) * POSTS_PER_PAGE;
const posts = sortedPosts.slice(start, start + POSTS_PER_PAGE);
---

<Base title={`博客 - 第 ${currentPage} 页`}>
  <h1>博客</h1>

  <ul>
    {posts.map((post) => (
      <li>
        <a href={`/blog/${post.data.slug}`}>{post.data.title}</a>
      </li>
    ))}
  </ul>

  <nav>
    {currentPage > 1 && (
      <a href={`/blog/page/${currentPage - 1}`}>上一页</a>
    )}
    <span>第 {currentPage} 页，共 {totalPages} 页</span>
    {currentPage < totalPages && (
      <a href={`/blog/page/${currentPage + 1}`}>下一页</a>
    )}
  </nav>
</Base>

添加 RSS 订阅

以下端点为博客生成 RSS 订阅：

import rss from "@astrojs/rss";
import { getEmDashCollection } from "emdash";

export async function GET(context) {
	const { entries: posts } = await getEmDashCollection("posts", {
		status: "published",
	});

	return rss({
		title: "我的博客",
		description: "使用 EmDash 构建的博客",
		site: context.site,
		items: posts.map((post) => ({
			title: post.data.title,
			pubDate: post.data.publishedAt,
			description: post.data.excerpt,
			link: `/blog/${post.data.slug}`,
		})),
	});
}

该订阅依赖 @astrojs/rss 包。使用以下命令安装：

npm install @astrojs/rss

下一步

内容操作 - 学习管理面板中的 CRUD 操作
媒体库 - 为文章添加图片
分类法 - 创建自定义分类系统