Sangria middleware to log slow GraphQL queries

[ram...@spineor.com]

Hi, I am trying to integrate Sangria middleware to log slow GraphQL queries in my application but getting the following compilation error:

type mismatch;

found : sangria.schema.Schema[models.UserRepo,Unit]

required: sangria.schema.Schema[Any,Unit]

Note: models.UserRepo <: Any, but class Schema is invariant in type Ctx.

You may wish to define Ctx as +Ctx instead. (SLS 4.5)

Error occurred in an application involving default arguments.

**code snippet**

val Query = ObjectType("Query", List[Field[UserRepo, Unit]]

(Field("store", StoreType, resolve = _ ⇒ ()) ))

val schema = Schema(Query, Some(MutationType))

val logResult = Executor.execute(SchemaDefinition.schema,

query.asInstanceOf[Document], middleware = SlowLog(newlogger,

threshold = 10 seconds) :: Nil)

Here is the reference link :

https://github.com/sangria-graphql/sangria-slowlog

Kindly help me to know what is a proper signature of Executor.execute(​​​????) and to typecast  query "(val query = "g.V().has('BaseModel','YearID','" + year + "').out('make').dedup()")"  to document type.

How to fixed above type mismatch issues

Thanks!

[Peter Hunsberger]

I think you need to change your Field type to Field[Any,Unit], (I've been forced to always use [Any, Any] to get everything to line up every where...), I don't see that you are passing in a UserRepo on the execute method?

It looks like you are targeting some DB that uses Gremlin with your query?  That will be done in a method that you need to point to as the target of resolve, in the Execute step you have a graphql query that you use as the document.

[ram...@spineor.com]

Thanks for your response & help @Peter

Now I am using this:

val SchemaDefinition.schema : Schema[UserRepo, Unit]= Schema(Query, Some(MutationType))
val query = "g.V().has('BaseVehicle','YearID','" + year + "').out('make').dedup()"

Executor.execute(SchemaDefinition.schema, query.asInstanceOf[Document], UserRepo.this, middleware = SlowLog(logger2, threshold = 10 seconds) :: Nil)

When I execute my query : -

{

  store {

    makes(year: "1999") {

      value

    }

  }

}

Getting response : -

{

  "data": null,

  "errors": [

    {

      "message": "Internal server error",

      "path": [

        "store",

        "makes"

      ],

      "locations": [

        {

          "line": 3,

          "column": 5

        }

      ]

    }

  ]

}

And on IntelliJ console  showing : -
java.lang.ClassCastException: java.lang.String cannot be cast to sangria.ast.Document.

Please suggest me how to cast a String to Document or any other solution to fix this.

 Thanks !!

[Oleg Ilyenko]

FYI, this question is also duplicated on StackOverflow: https://stackoverflow.com/questions/45832507/what-is-a-proper-signature-of-executor-execute-in-sangria-middleware-to-l/45850404#45850404

[Ramraj Yadav]

Thanks!

Now fixed that by using:

Executor.execute(SchemaDefinition.schema, queryAst, new UserRepo(ws),middleware = SlowLog(logger, threshold = 0 seconds) :: Nil, operationName = operation,  variables = variables getOrElse Json.obj(),  maxQueryDepth = Some(10))

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