Bug? ExecPager isn't exported

[naamancurtis]

Hey,

I was trying to write some logic to issue a paged query using a prepared statement, however the type that exec returns - ExecPager isn't exported from cdrs_tokio::cluster. The struct is marked as public, however it doesn't appear to offer any interface to convert it into a type that I do have access to. My primary reason for wanting access to the type is so that I can return it as the result of a helper function. https://docs.rs/cdrs-tokio/3.0.0/src/cdrs_tokio/cluster/pager.rs.html#174

let mut pager = self.conn.paged(5);
let query = pager.exec(&prepared_query);

Am I just misunderstanding the API? or is this a quick fix?

[krojew]

You should be able to call next() on ExecPager to get the data. https://github.com/krojew/cdrs-tokio/blob/master/examples/paged_query.rs shows how to use paged queries, although it uses QueryPager with string queries.

[naamancurtis]

Thanks for the quick response. Yep, that makes sense.

However I was hoping to abstract the query creation logic into a function that I can call that would return an ExecPager. eg:

    async fn create_query<'a, Q: ToString, P: 'a>(
        &self,
        timeout_duration: Duration,
    ) -> ExecPager<'a, Q, P>;

But without ExecPager I'm not able to type the return type of the function? unless there's a trait I can use in it's place?

As an aside (apologies for hijacking the issue) I notice there's no way of providing parameters to a prepared query when using this pagination interface, is there a specific reason for this, or has the feature just not been implemented yet?