Can't use input type in query

[PiotrSzlagura]

Preconditions

1. Magento version: 2.3
2. PHP: 7.1.18
3. Server: nginx, version: 1.12.2

Steps to reproduce

1. Create empty Magento 2.3 instance
2. Install sample data from repo
3. Using graphql client/plugin of your choice (tested on many of them, always with the same result) send POST request to http://[your Magento instance]/index.php/graphql

query GetProductsQuery($page: Int, $filterInput: ProductFilterInput){
  products(
    pageSize: 10
    currentPage: $page
    filter: $filterInput
    sort: {}
  ) {
    items {
    	name
    }
  }
}

with variables:

{
  "page": 1,
  "price": {
    "gt": "10"
  }
}

Expected result

1. Query should return filtered products list, since ProductFilterInput is an input type, according to scheme

Actual result

1. Received following error:

Variable "$filterInput" cannot be non-input type "ProductFilterInput".
Variable "$filterInput" of type "ProductFilterInput" used in position expecting type "ProductFilterInput".

I've tested this approach on clean GraphQL installation and it worked without any problem.

[zetlen]

I ran into this too! The types called "Input" in our schema are not implemented as actual GraphQL input types in the current build.

Workaround: Build the filter input shape inside the query, and use only primitives as variables.

query GetProductsQuery($page: Int, $minPrice: String){
  products(
    pageSize: 10
    currentPage: $page
    filter: {
      price: {
        gt: $minPrice
      }
    }
    sort: {}
  ) {
    items {
    	name
    }
  }
}

with variables:

{
  "page": 1,
  "price": {
    "gt": "10"
  }
}

This is a real bug and not a style issue, because without an actual input type, the filter conditions are not actually configurable--they're hardcoded into the query. I'm sure that wasn't the intention.

[ghost]

@PiotrSzlagura, thank you for your report.
We've acknowledged the issue and added to our backlog.

[misha-kotov]

This issue is a duplicate of magento/graphql-ce#93 - we will be tracking progress over there in the GraphQL project.