File System Route API causes unicode routes to be 404

[dangkyokhoang]

Description

Gatsby "slugifies" routes by default (https://www.gatsbyjs.com/docs/reference/routing/file-system-route-api/#routing-and-linking) which produces unexpected and unwanted routes.

Steps to reproduce

Create any route using File System Route API, for example: {Post.slug}.js.

Expected result

Accessing routes with unicode characters should work.

Actual result

Accessing routes with unicode characters returns 404 because the pages that Gatsby creates have "slugified" routes. This should not be the default behavior. If it must be the default behavior, there should be an option to disable it.

Environment

System:
OS: Windows 10 10.0.18363
Binaries:
Node: 15.11.0 - C:\Program Files\nodejs\node.EXE
npmPackages:
gatsby: 3.1.2 => 3.1.2
gatsby-plugin-google-analytics: ^3.1.0 => 3.1.0
gatsby-plugin-react-helmet: ^4.1.0 => 4.1.0
gatsby-plugin-react-svg: ^3.0.0 => 3.0.0
gatsby-plugin-remove-trailing-slashes: ^3.1.0 => 3.1.0
gatsby-plugin-sass: ^4.1.0 => 4.1.0

[LekoArts]

You can override the gatsby-plugin-page-creator instance and give it a slugify option: https://github.com/gatsbyjs/gatsby/blob/54d4721462b9303fed723fdcb15ac5d72e103778/packages/gatsby-plugin-page-creator/README.md

// gatsby-config.js
module.exports = {
  plugins: [
    {
      resolve: `gatsby-plugin-page-creator`,
      options: {
        path: `${__dirname}/src/pages`,
        slugify: { /* your options */ },
      },
    },
  ],
}

[dangkyokhoang]

Thanks for your answer but the plugin doesn't allow disabling slugify.

And I got this warning when adding the above config to gatsby-config.js:

warn Non-deterministic routing danger: Attempting to create page: "/slug", but page "/slug" already exists
This could lead to non-deterministic routing behavior

It seems that the above config doesn't override the plugin's default config.

[LekoArts]

From our testing it should override the default, you might see this error due to the "remove-trailing-slashes" plugin.

And yes, you can modify the slugify options but you can't disable the behavior itself. If you want specific characters to stay the same you could use the custom replacements: https://github.com/sindresorhus/slugify#customreplacements

[dangkyokhoang]

May I create a pull request to add disabling feature?