scala - Left outer join on Slick/Mysql -


i having trouble using left outer join in slick. i'll start code : 

val articles = (for {     (article, lecture) <- articledao leftjoin lecturedao on (_.id === _.idarticle) if     (article.flux === idflux) } yield (article, lecture.isstarred.?)).groupby(_._1.guid).map {     case (guid, rows) => rows.first }

ps : articledao & lecturedao objects extending table in opposition article & lecture simple case classes.

this error, getting when compiling part above :

don't know how unpack (models.article, option[boolean]) t , pack g

i don't understand error. know has transformation, composition of queries have no idea how change/fix it. shed light on this?

the fix explained here: https://groups.google.com/forum/#!topic/scalaquery/bifh6be99b0 . .first not query operation @ moment, use .min instead.


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