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Today I added a RSS feed to this blog. I’m not happy with it.

This blog runs on Gatsby and uses mdx instead of Markdown.

Adding a new plugin, the gatsby-plugin-feed, was easy. But it doesn’t work with mdx.

Although the RSS feed gets rendered, I can’t add a title or description to the feed.

It looks like it’s a bug.

Here’s how the config looks:

plugins: [
  {
    resolve: `gatsby-plugin-feed`,
    options: {
      query: `
          {
            site {
              siteMetadata {
                siteTitle
                siteDescription
                siteUrl
                site_url: siteUrl
              }
            }
          }
        `,
      feeds: [
        {
          serialize: ({ query: { site, allMdx } }) =>
            allMdx.edges.map(edge =>
              Object.assign({}, edge.node.frontmatter, {
                description: edge.node.excerpt,
                date: edge.node.frontmatter.date,
                url: site.siteMetadata.siteUrl + edge.node.fields.slug,
                guid: site.siteMetadata.siteUrl + edge.node.fields.slug,
                custom_elements: [{ 'content:encoded': edge.node.html }],
              })
            ),
          query: `
        {
        allMdx(
          limit: 1000,
          sort: { fields: [frontmatter___date], order: DESC }
          ) {
          edges {
            node {
              fields {
                slug
              }
              frontmatter {
                title
                tags
              }
              excerpt
            }
          }
        }
      }
            `,
          output: '/rss.xml',
          title: `${config.siteTitle} RSS Feed`,
          description: `${config.siteDescription}`,
        },
      ],
    },
  },
]

Here’s the excerpt from the xml:

<rss xmlns:dc="https://purl.org/dc/elements/1.1/" xmlns:content="https://purl.org/rss/1.0/modules/content/" xmlns:atom="https://www.w3.org/2005/Atom" version="2.0">
<script/>
<channel>
<title>
<![CDATA[ Untitled RSS Feed ]]>
</title>
<description>
<![CDATA[ Untitled RSS Feed ]]>
</description>

It somehow works, but not really?