permalink output conflict when more than 2 pages are added to a collection

wcDogg commented 11 months ago

Operating system

Windows 11

Eleventy

2.0.1

Describe the bug

Hello - I'm having the strangest issue with permalinks and could use some help.

Repo: https://github.com/wcDogg/eleventy-test

npm run build - No errors
Move test-c.md to either /c_blog/ or /c_docs/
npm run build - Output conflict

I discovered this in a larger project and reproduced it in the repo above:

There 2 collections defined in .eleventy.js - blog and docs.
Each collection has it's own a directory - c_blog and c_docs.
Each directory has a JSON with a default permalink like this: "permalink": "/blog/{{ page.fileSlug }}/".
Each directory has an index.html where the default is overridden like this: permalink: /blog/.

This works as expected for the index.html, test-a.md, and test-b.md. However, once a test-c.md is added to either collection, I get this:

[11ty] Output conflict: multiple input files are writing to `public/blog/index.html`. Use distinct `permalink` values to resolve this conflict.
[11ty]   1. ./src/c_blog/index.html
[11ty]   2. ./src/c_blog/index.html (via DuplicatePermalinkOutputError)

I'm not sure what's going on or how to investigate further - any help would be much appreciated :)

Reproduction steps

Go to '...'
Click on '....'
Scroll down to '....'
See an error

Expected behavior

No response

Reproduction URL

No response

Screenshots

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wcDogg commented 11 months ago

Okay, so I see this is happening because /blog/index.html/ is paginated. I know I need a permalink like:

  permalink: "{%- if pagination.pageNumber == 0 -%}/blog/{%- else -%}/blog/{{- pagination.pageNumber -}}/{%- endif -%}"

Sadly, this and variations of it aren't working - maybe I have the syntax wrong?

pdehaan commented 11 months ago

Does anything in this help? https://www.11ty.dev/docs/pagination/#remapping-with-permalinks

Not sure what template syntax you're using, but in case you're using some defaults/LiquidJS, this Note is probably semi-relevant:

[!NOTE] that the above example works in Nunjucks but {{ pagination.pageNumber + 1 }} is not supported in Liquid. Use {{ pagination.pageNumber | plus: 1 }} instead.

wcDogg commented 11 months ago

Figured it out - my permalink above does solve the issue - I had it indented in the YAML :P

BayuAngora commented 6 months ago

I have the same problem with my "blog" section and "quote" section.

blog.json

{
  "tags": "blog",
  "layout": "single",
  "permalink" : "{{ title | slug }}"
}

quote.json

{
  "tags": "quote",
  "layout": "single",
  "permalink" : "{{ title | slug }}"
}

Run npm run build-ghpages

> build-ghpages
> npx @11ty/eleventy

[11ty] Problem writing Eleventy templates: (more in DEBUG output)
[11ty] Output conflict: multiple input files are writing to `_site/undefined/index.html`. Use distinct `permalink` values to resolve this conflict.
[11ty]   1. ./content/quote/index.md
[11ty]   2. ./content/blog/index.md (via DuplicatePermalinkOutputError)
[11ty] 
[11ty] Original error stack trace: (Repeated output has been truncated…)
[11ty]     at TemplateMap.checkForDuplicatePermalinks (/home/runner/work/11ty/11ty/node_modules/@11ty/eleventy/src/TemplateMap.js:799:13)
[11ty]     at TemplateMap.cache (/home/runner/work/11ty/11ty/node_modules/@11ty/eleventy/src/TemplateMap.js:[4](https://github.com/BayuAngora/11ty/actions/runs/8506589357/job/23297044915#step:7:5)84:10)
[11ty]     at async TemplateWriter._createTemplateMap (/home/runner/work/11ty/11ty/node_modules/@11ty/eleventy/src/TemplateWriter.js:330:[5](https://github.com/BayuAngora/11ty/actions/runs/8506589357/job/23297044915#step:7:6))
[11ty]     at async TemplateWriter.generateTemplates (/home/runner/work/11ty/11ty/node_modules/@11ty/eleventy/src/TemplateWriter.js:3[6](https://github.com/BayuAngora/11ty/actions/runs/8506589357/job/23297044915#step:7:7)0:5)
[11ty]     at async TemplateWriter.write (/home/runner/work/11ty/11ty/node_modules/@11ty/eleventy/src/TemplateWriter.js:40[7](https://github.com/BayuAngora/11ty/actions/runs/8506589357/job/23297044915#step:7:8):23)
[11ty]     at async Eleventy.executeBuild (/home/runner/work/11ty/11ty/node_modules/@11ty/eleventy/src/Eleventy.js:1160:13)
[11ty] Copied 5 files / Wrote 0 files in 0.12 seconds (v2.0.0)
Error: Process completed with exit code 1.

I got an error because of that permalink part. Even when my single posts has different title.

11ty / eleventy