rubyjekyllbundlerjekyll-extensions

Getting an error from jekyll-sitemap plugin: undefined method `fetch' for true:TrueClass in sitemap.xml

First question here and new to Ruby and Jekyll so forgive me if I miss some important details.

I'm trying to use bundle exec jekyll serve to generate my static site, but I keep getting the following error message:

  Liquid Exception: undefined method `fetch' for true:TrueClass in sitemap.xml

Edit: The problem was I had deleted/modified the something in my collections configuration in my _config.yml.

It should have been

collections:
  my_collection:
    output: true

...but instead was simply

collections:
      output: true

Not sure if it was always like that, or if I had modified it somehow. Check your _config.yml!

Solution

  • I have tested the gem without getting any error.

    _config.yml 

    plugins:
  - jekyll-sitemap

collections_dir: my_collections

collections:
  books:
    output: true

    Gemfile

    source 'https://rubygems.org' do 
  gem "jekyll"
  gem 'jekyll-sitemap'
end

    book.md in my_collections\books

    ---
title: first book
---

first book

    Resulting sitemap.xml

    <?xml version="1.0" encoding="UTF-8"?>
<urlset xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.sitemaps.org/schemas/sitemap/0.9 http://www.sitemaps.org/schemas/sitemap/0.9/sitemap.xsd" xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
<url>
<loc>http://localhost:4000/books/book/</loc>
</url>
<url>
<loc>http://localhost:4000/</loc>
</url>
</urlset>

    As said in my comment above I assume that there is a problem in your collection configuration in your _config.yml file. Also, there are some known issues listed on the official plugin page.