"Invalid search field for this query" for example query on Customer-Resource

GraphQL Admin API Troubleshooting
4

So the documentation is wrong in regards to mentioning the country in the example code? What about the created_at-field?

I tried @kyle_liu suggested search query from Get all customers with a specific tag in Admin API - #7 by kyle_liu, which does no longer throw a parsing error for the query but also does not return any customer which is not the expected result.

query {
  customers(first: 1, query: "customer_tags CONTAINS 'ABC'") {
    edges {
      node {
        id
        displayName
        firstName
      }
    }
  }
}

I have a customer with a tag “ABC”, but the list returned is empty. Using the debug-parameter i get the following info about the search parsing.

"search": [{
        "path": [
            "customers"
        ],
        "query": "customer_tags CONTAINS 'ABC'",
        "parsed": {
            "and": [{
                    "field": "default",
                    "match_all": "customer_tags CONTAINS"
                }, {
                    "field": "default",
                    "match_phrase": "ABC"
                }
            ]
        }
    }
]

To me this looks like it did not understand the query as expected and is searching the “default”-fields (What are the default fields???) for "customer_tags CONTAINS" and "ABC".

I guess this circles back to my secondary question regarding a list of possible fields to use in the search querys. How does one know which fields are available and which are not?