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建立部落格

本頁內容

本指南將帶你使用 EmDash 從零建立部落格：從定義內容類型，到展示含分類與標籤的文章。

前提條件

  • 已建立並執行 EmDash 網站（參見快速入門）
  • 具備 Astro 元件的基本認識

定義文章集合

EmDash 在初始化時會建立預設的「posts」集合。如需自訂，請使用管理後台或 API。

預設 posts 集合包含：

  • title — 文章標題
  • slug — 適合 URL 的識別碼
  • content — 富文字正文
  • excerpt — 摘要
  • featured_image — 首圖（選填）
  • status — 草稿、已發佈或排程
  • publishedAt — 發佈時間（系統欄位）

建立第一篇文章

  1. 開啟管理後台 /_emdash/admin

  2. 在側欄點選 Posts

    EmDash 文章清單，顯示標題、狀態與日期

  3. 點選 New Post

    EmDash 文章編輯器，含標題、內容與發佈選項

  4. 輸入標題，並以富文字編輯器撰寫內文

  5. 在側欄面板新增分類與標籤

  6. 將狀態設為 Published

  7. 點選 Save

文章立即上線，無需重新建置網站。

在網站上展示文章

列出全部文章

建立頁面以顯示所有已發佈文章：

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

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

// Sort by publication date, newest first
const sortedPosts = posts.sort(
  (a, b) => (b.data.publishedAt?.getTime() ?? 0) - (a.data.publishedAt?.getTime() ?? 0)
);
---

<Base title="Blog">
  <h1>Blog</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>

展示單篇文章

為每篇文章建立動態路由：

---
import { getEmDashCollection, getEmDashEntry } from "emdash";
import { PortableText } 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 && (
      <img src={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>

新增分類與標籤

EmDash 內建分類與標籤分類法。詳見分類法以建立與管理詞條。

依分類篩選文章

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

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

  // Flatten hierarchical categories
  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>

在文章上顯示分類

在單篇文章中展示分類：

---
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>Categories:</span>
      {categories.map((cat) => (
        <a href={`/category/${cat.slug}`}>{cat.label}</a>
      ))}
    </div>
  )}

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

新增分頁

文章較多時可加入分頁：

---
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={`Blog - Page ${currentPage}`}>
  <h1>Blog</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/${currentPage - 1}`}>Previous</a>
    )}
    <span>Page {currentPage} of {totalPages}</span>
    {currentPage < totalPages && (
      <a href={`/blog/page/${currentPage + 1}`}>Next</a>
    )}
  </nav>
</Base>

新增 RSS 訂閱

為部落格產生 RSS：

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: "My Blog",
		description: "A blog built with EmDash",
		site: context.site,
		items: posts.map((post) => ({
			title: post.data.title,
			pubDate: post.data.publishedAt,
			description: post.data.excerpt,
			link: `/blog/${post.data.slug}`,
		})),
	});
}

若尚未安裝 RSS 套件：

npm install @astrojs/rss

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