My goal is to use AWS Amplify in a Sapper project.
Creating a Sapper project from scratch (using webpack) then adding AWS Amplify and running it in dev is a success, but run it in production throws a GraphQL error in the console (Uncaught Error: Cannot use e "__Schema" from another module or realm).
Fixing this error thows another one (Uncaught ReferenceError: process is not defined).
A solution is to upgrade GraphQL from 0.13.0 to 14.0.0 unfortunatly GraphQL 0.13.0 is an AWS Amplify API dependency.
Does anyone know what can be done to get AWS Amplify work with Sapper in production ?
The link to the repo containing the source files is located here: https://github.com/ehemmerlin/sapper-aws-amplify
(Apologies for the long post but I want to be explicit)
Detailled steps
1/ Create a Sapper project using webpack (https://sapper.svelte.dev).
npx degit "sveltejs/sapper-template#webpack" my-app
cd my-app
yarn install
2/ Add AWS Amplify (https://serverless-stack.com/chapters/configure-aws-amplify.html) and lodash
yarn add aws-amplify
yarn add lodash
3/ Configure AWS Amplify (https://serverless-stack.com/chapters/configure-aws-amplify.html)
Create src/config/aws.js config file containing (change the values with yours but works as is for the purpose of this post):
export default {
s3: {
REGION: "YOUR_S3_UPLOADS_BUCKET_REGION",
BUCKET: "YOUR_S3_UPLOADS_BUCKET_NAME"
},
apiGateway: {
REGION: "YOUR_API_GATEWAY_REGION",
URL: "YOUR_API_GATEWAY_URL"
},
cognito: {
REGION: "YOUR_COGNITO_REGION",
USER_POOL_ID: "YOUR_COGNITO_USER_POOL_ID",
APP_CLIENT_ID: "YOUR_COGNITO_APP_CLIENT_ID",
IDENTITY_POOL_ID: "YOUR_IDENTITY_POOL_ID"
}
};
Add the following code to the existing code in src/client.js:
import config from './config/aws';
Amplify.configure({
Auth: {
mandatorySignIn: true,
region: config.cognito.REGION,
userPoolId: config.cognito.USER_POOL_ID,
identityPoolId: config.cognito.IDENTITY_POOL_ID,
userPoolWebClientId: config.cognito.APP_CLIENT_ID
},
Storage: {
region: config.s3.REGION,
bucket: config.s3.BUCKET,
identityPoolId: config.cognito.IDENTITY_POOL_ID
},
API: {
endpoints: [
{
name: "notes",
endpoint: config.apiGateway.URL,
region: config.apiGateway.REGION
},
]
}
});
4/ Test it
In dev (yarn run dev): it works
In production (yarn run build; node __sapper__/build): it throws an error.
Uncaught Error: Cannot use e "__Schema" from another module or realm.
Ensure that there is only one instance of "graphql" in the node_modules
directory. If different versions of "graphql" are the dependencies of other
relied on modules, use "resolutions" to ensure only one version is installed.
https://yarnpkg.com/en/docs/selective-version-resolutions
Duplicate "graphql" modules cannot be used at the same time since different
versions may have different capabilities and behavior. The data from one
version used in the function from another could produce confusing and
spurious results.
5/ Fix it
Following the given link (https://yarnpkg.com/en/docs/selective-version-resolutions) I added this code to package.json file:
"resolutions": {
"aws-amplify/**/graphql": "^0.13.0"
}
6/ Test it
rm -rf node_modules; yarn install
Throws another error in the console (even in dev mode).
Uncaught ReferenceError: process is not defined
at Module../node_modules/graphql/jsutils/instanceOf.mjs (instanceOf.mjs:3)
at \_\_webpack_require\_\_ (bootstrap:63)
at Module../node_modules/graphql/type/definition.mjs (definition.mjs:1)
at \_\_webpack_require\_\_ (bootstrap:63)
at Module../node_modules/graphql/type/validate.mjs (validate.mjs:1)
at \_\_webpack_require\_\_ (bootstrap:63)
at Module../node_modules/graphql/graphql.mjs (graphql.mjs:1)
at \_\_webpack_require\_\_ (bootstrap:63)
at Module../node_modules/graphql/index.mjs (main.js:52896)
at \_\_webpack_require\_\_ (bootstrap:63)
A fix given by this thread (https://github.com/graphql/graphql-js/issues/1536) is to upgrade GraphQL from 0.13.0 to 14.0.0 unfortunatly GraphQL 0.13.0 is an AWS Amplify API dependency.
