If I have 2 .graphql schemas that import each other:

[theodorDiaconu]

This is a very common scenario:

// Comment.graphql
#import './User'

type Comment {
  title: String!
  isDone: Boolean!
  createdAt: Date!
  user: User
}

// User.graphql
#import './Comment'

type User {
  _id: ID!
  firstName: String!
  lastName: String!
  age: Int
  comments: [Comment]
}

Fails with:

W20180310-07:05:55.673(2)? (STDERR) TypeError: Cannot read property 'filter' of undefined
W20180310-07:05:55.673(2)? (STDERR)     at unique (/Users/theodor/Projects/graphql-live/.meteor/local/build/programs/server/app/app.js:30:19)
W20180310-07:05:55.673(2)? (STDERR)     at Comment.graphql.js (/Users/theodor/Projects/graphql-live/.meteor/local/build/programs/server/app/app.js:43:44)
W20180310-07:05:55.673(2)? (STDERR)     at fileEvaluate (packages/modules-runtime.js:343:9)
W20180310-07:05:55.674(2)? (STDERR)     at require (packages/modules-runtime.js:238:16)

[thearabbit]

I have the same error.
Could you share your solve?

[thearabbit]

I try remove #import './User', It still work fine.
Don't understand???

[thearabbit]

+1 have any solve this problem???