Gatsby: UNHANDLED REJECTION Schema must contain uniquely named types but contains multiple types named "File". While using createRemoteFileNode in createResolvers

[laurenskling]

Description

Upgrading to 2.18.1 (2.17.x is fine) generates a bug in my code, where i'm using createResolvers with createRemoteFileNode exactly as described here: https://github.com/gatsbyjs/gatsby/blob/master/docs/docs/schema-customization.md#feeding-remote-images-into-gatsby-image

Steps to reproduce

Follow these steps: https://github.com/gatsbyjs/gatsby/blob/master/docs/docs/schema-customization.md#feeding-remote-images-into-gatsby-image

Expected result

The files get downloaded and added to the schema as a File so we can query them with Sharp

Actual result

This error:

ERROR 

UNHANDLED REJECTION Schema must contain uniquely named types but contains multiple types named "File".



  Error: Schema must contain uniquely named types but contains multiple types named "File".

  - Array.reduce

  - SchemaComposer.js:130 SchemaComposer.buildSchema
    [carsite]/[graphql-compose]/lib/SchemaComposer.js:130:12

  - schema.js:766 addCustomResolveFunctions
    [carsite]/[gatsby]/dist/schema/schema.js:766:45

  - schema.js:227 updateSchemaComposer
    [carsite]/[gatsby]/dist/schema/schema.js:227:9

  - next_tick.js:68 process._tickCallback
    internal/process/next_tick.js:68:7

Environment

System:
OS: macOS Mojave 10.14.6
CPU: (4) x64 Intel(R) Core(TM) i5-6267U CPU @ 2.90GHz
Shell: 3.2.57 - /bin/bash
Binaries:
Node: 10.15.1 - /var/folders/pp/s13nkxgs3p55k2tysv_tbpt40000gn/T/yarn--1574329843466-0.9005054828235552/node
Yarn: 1.19.1 - /var/folders/pp/s13nkxgs3p55k2tysv_tbpt40000gn/T/yarn--1574329843466-0.9005054828235552/yarn
npm: 6.4.1 - /usr/local/bin/npm
Languages:
Python: 2.7.13 - /usr/local/bin/python
Browsers:
Chrome: 78.0.3904.108
Firefox: 63.0.3
Safari: 13.0.3

[laurenskling]

https://github.com/gatsbyjs/gatsby/pull/19092 this causes my bug. When the schema starts rebuilding, it crashes on the message written above

[vladar]

Does it happen in both build and develop? Could you maybe post the full log from CLI?

[laurenskling]

Just tried a build and indeed, the error does not throw on build.

It throws on develop when the first remote image is downloaded (and the schema gets updated I guess)

[vladar]

It is an edge case with schema rebuilding caused by third-party-schema customizations. Should be fixed by #19712 (published in gatsby 2.18.2)

Thanks for reporting this!

[laurenskling]

Thanks so much for the extremely quick fix! It's working perfectly for me <3

[chandlervdw]

@vladar I get this same issue with gatsby 2.20.29 except that it’s for "ImageFormat"

[vladar]

@chandlervdw I suggest creating a new issue with a minimal reproduction and tag me on it.

[damnitrahul]

@vladar @chandlervdw Facing same issue after adding gatsby-source-sanity-transform-images plugin.

````
Error
UNHANDLED REJECTION Schema must contain uniquely named types but contains multiple types named "ImageFormat".

Error: Schema must contain uniquely named types but contains multiple types named "ImageFormat".

• Array.reduce

• Array.reduce

• SchemaComposer.js:130 SchemaComposer.buildSchema
  [Gatsby Blog]/[graphql-compose]/lib/SchemaComposer.js:130:12

• schema.js:807 addCustomResolveFunctions
  [Gatsby Blog]/[gatsby]/dist/schema/schema.js:807:45

• schema.js:227 updateSchemaComposer
  [Gatsby Blog]/[gatsby]/dist/schema/schema.js:227:9

• schema.js:95 async buildSchema
  [Gatsby Blog]/[gatsby]/dist/schema/schema.js:95:3

• index.js:138 async Object.build
  [Gatsby Blog]/[gatsby]/dist/schema/index.js:138:18

• index.js:419 async module.exports
  [Gatsby Blog]/[gatsby]/dist/bootstrap/index.js:419:3

• develop.js:441 async module.exports
  [Gatsby Blog]/[gatsby]/dist/commands/develop.js:441:7
  ````

Plugins List

plugins: [ `gatsby-plugin-react-helmet`, { resolve: `gatsby-source-filesystem`, options: { name: `images`, path: `${__dirname}/src/images` } }, `gatsby-transformer-sharp`, `gatsby-plugin-sharp`, { resolve: `gatsby-plugin-manifest`, options: { name: `gatsby-starter-default`, short_name: `starter`, start_url: `/`, background_color: `#663399`, theme_color: `#663399`, display: `minimal-ui`, icon: `src/images/gatsby-icon.png` // This path is relative to the root of the site. } }, { resolve: 'gatsby-source-sanity', options: { projectId: 'rhqgrccr', dataset: 'production', token: process.env.MY_SANITY_TOKEN } }, 'gatsby-source-sanity-transform-images' } } } ]