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@gypsy

Slickでcoalesceする方法

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scalaのPlayFrameworkでSlickを使用してDB操作を行う際のcoalesceのやり方メモ。

play-slickのバージョン

build.sbt
libraryDependencies += "com.typesafe.play" %% "play-slick" % "3.0.3"

記法

A.ifNull(B)

例えば

SELECT COALESCE(A,B) FROM TABLE_NAME

は

val query = TableQuery[TABLE_NAME].map(x => x.A.ifNull(x.B))

となる

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