Pass custom params to @cypher directive

[EduardTrutsyk]

Is it possible to pass custom params(for example currentUserId from the session) to @cypher directive?

I have req.user in context, and sometimes I need to write cypher query base on the current user id.

type Movie {
    title: String
    year: Int
    imdbRating: Float
    liked: Boolean @cypher(statement: """
      WITH {this} as this MATCH (this)<-[r:LIKE]-(:User{userId: $currentUserId}) RETURN COUNT(r)>0
    """)
}

[johnymontana]

Ah yes, this is something we wanted to add for exactly these kind of cases. How should this be configured? I'm not sure it would it make sense to add the entire context object, but maybe just add the entire context.request or context.req?

[EduardTrutsyk]

Great! Thanks @johnymontana

From my point of view, to make it flexible and independent, would be nice to add everything from context.cypherParams (or something like that).

context: ({ req }) => ({
      req,
      driver,
      cypherParams: {
          currentUserId: req.user.id
      }
})

[johnymontana]

@EduardTrutsyk this is now implemented in v2.4.0. Could you give it a try?

[EduardTrutsyk]

Everything works fine, good job guys! We can close #187

[btroop]

Not sure if I'm missing something, but just wanted to call out that the only way I can get it to work for a cypher statement attached to a user-defined query is like this:

type Query {
    favoriteMovies: [Movie] @cypher(statement: """
      MATCH (m:Movies)<-[r:IS_FAVORITE]-(:User{userId: $cypherParams.currentUserId}) RETURN m
    """)
}

I tried it without the cypherParams prefix of the object and it threw errors looking for the $currentUserId parameter