appsync-emulator-serverless TypeError: Path must be a string. Received undefined about aws-utils HOT 3 CLOSED

@devmetal I ran into the same issue today.
The problem is indeed that the mappingTemplates template is an array of arrays and is not flattened by the emulator like it is by the appsync-plugin

Same problem occurs after implementing this: sid88in/serverless-appsync-plugin#216 for the datasources.

And also when using an object as datasources instead of an array:

datasources:
  dataName:
    type: type: AWS_LAMBDA

from aws-utils.

@bboure Thank you :) It will be great if we can use same modular structure in data sources as we used in mapping templates :) I think my pr will solve this in appsync emulator. Thank you for support, and thanks for this big improvement in appsync plugin i can't wait to try it :)

from aws-utils.

Hi guys, I'm facing with this problem right now. Code written by @devmetal solve the problem, but only if you call function loadConfiguration.js that flat the mappingTemplates property. If you receive a serverless configuration from outside (server.js [line: 44])

const createSchema = async ({
  serverless,
  schemaPath = null,
  pubsub,
  dynamodb,
} = {}) => {
  let serverlessConfig = {};
  let serverlessDirectory;
  if (typeof serverless === 'object') {
    serverlessConfig = serverless.service;
    serverlessDirectory = serverless.config.servicePath;
  }

You'll receive the same message: The "path" argument must be of type string. Received type undefined. I'm thinking to split the part that load configuration from file and move construction and flattening of structure into a new common function (e.g. normalizeConfiguration).

What do you think?

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