How to fix "No implicit view available ..." error triggered by By.apply(field,value)(implicit ev) in MetaMapper.scala

[Baskaran S]

As a beginner, I am trying out examples from Lift In Action written for 2.x using Lift 3.5.0.

Resolved few deprecation errors and then ended up with a compilation error. Can you help me fix this error?

[error] .../example/travel/model/Auction.scala:81:28: No implicit view available from Auction.this.id.type => Long.

[error]   def bids = Bid.findAll(By(Bid.auction, this.id), OrderBy(Bid.id, Descending))

[error]                            ^

[error] one error found

MetaMapper.scala, object By, from github url.

object By {

  ...

  def apply[O <: Mapper[O], T, U](field: MappedField[T, O], value: U)(implicit ev: U => T) = Cmp[O,T](field, Eql, Full(value), Empty, Empty)

  ...

}

Thanks in advance

- Baskaran

[Baskaran S]

Replaced: def bids = Bid.findAll(By(Bid.auction, this.id), OrderBy(Bid.id, Descending))

with:     def bids = Bid.findAll(By(Bid.auction, this.id)(_.get), OrderBy(Bid.id, Descending))

It compiles, but is it correct?

- Baskaran