Ive added a content type to datamodel.graphql:

type Location {
	id: ID! @unique
	name: String!
	machineName: String
}

My query in graphiql works:

query {
  locations(
    where: {
      machineName: "paris"
    }
  ) {
    id
    name
    machineName
  }
}

Ive added a new resolver:

type Query {
  location: Location
  feed: [Post!]!
  drafts: [Post!]!
  post(id: ID!): Post
  locations: [Location!]!
  me: User
}

And created the resolver:

location(parent, { machineName }, ctx, info) {
    return ctx.db.query.location({ where: { machineName } }, info);
  },

But I try to call it from React I get an error:

Network error: Response not successful: Received status code 400

export const LOCATION_QUERY = gql`
  query LocationQuery {
    location(where: { machineName: "paris" }) {
      id
      name
      machineName
    }
  }
`;

What do your server logs say? Does your request even reach your server?

Ah it fails as soon as I add this

how? 🙂

Trial and error mostly 😉

Ok 😄 usually a pretty good strategy!

Ill post an answer in my forum question: https://www.graph.cool/forum/t/post-error-trying-to-query-by-a-field-value/3397

sure, will do so later 🙌