{"id":265,"date":"2012-05-01T16:07:51","date_gmt":"2012-05-01T07:07:51","guid":{"rendered":"http:\/\/lab.synergy-marketing.co.jp\/blog\/?p=265"},"modified":"2018-11-14T16:34:00","modified_gmt":"2018-11-14T07:34:00","slug":"scala-implicit-conversion-scalaquery","status":"publish","type":"post","link":"https:\/\/www.techscore.com\/blog\/2012\/05\/01\/scala-implicit-conversion-scalaquery\/","title":{"rendered":"Scala \u6697\u9ed9\u7684\u578b\u5909\u63db\u306e\u4f7f\u3044\u3069\u3053\u308d\uff08\u9ed2\u9b54\u8853ScalaQuery\u7de8)"},"content":{"rendered":"

\u3053\u3093\u306b\u3061\u306f\u3001\u99ac\u5834\u3067\u3059\u3002<\/p>\n

Scala \u3067DI (Cake Pattern\u5c0e\u5165\u7de8\uff09\u3067\u3001CakePattern\u306f\u30e1\u30f3\u30d0\u304c\u3064\u307e\u3065\u304f\u3068\u3053\u308d\u7b2c2\u4f4d\u3068\u66f8\u304d\u307e\u3057\u305f\u304c\u3001\u3067\u306f\u308f\u304b\u308a\u306b\u304f\u3044\u7b2c1\u4f4d\u304c\u4f55\u3060\u3063\u305f\u306e\u304b\u3002\u305d\u308c\u304cScalaQuery<\/a>\u3067\u3059\u3002\u4eca\u56de\u306f\u3001\u305d\u306e\u96e3\u89e3\u3055\u306e\u4e00\u56e0\u3001Scala\u306e\u9ed2\u9b54\u8853\u30fb\u6697\u9ed9\u7684\u578b\u5909\u63db\u306b\u3064\u3044\u3066\u8003\u3048\u3066\u3044\u304d\u305f\u3044\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n

\u30e1\u30bd\u30c3\u30c9\u304c\u306a\u3044\uff1f\uff01<\/h2>\n

\u3000\u3053\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u306f\u3001\u8af8\u3005\u306e\u4e8b\u60c5\u3067\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30a2\u30af\u30bb\u30b9\u306eAPI\u3068\u3057\u3066ScalaQuery\u3092\u5229\u7528\u3059\u308b\u3053\u3068\u306b\u306a\u308a\u307e\u3057\u305f\u3002\u3053\u306eScalaQuery\u3001\u3068\u306b\u304b\u304f\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u304c\u5c11\u306a\u3044\u306e\u3067\u3001\u57fa\u672c\u7684\u306a\u8a18\u8ff0\u65b9\u6cd5\u3092\u78ba\u8a8d\u3059\u308b\u306e\u306b\u30bd\u30fc\u30b9\u3092\u898b\u308b\u3053\u3068\u304c\u591a\u304b\u3063\u305f\u306e\u3067\u3059\u3002<\/p>\n

\u3042\u308b\u3068\u304d\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306aupdate\u6587\u3092\u5b9f\u884c\u3059\u308b\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u4f5c\u6210\u3057\u3088\u3046\u3068\u8003\u3048\u307e\u3057\u305f\u3002<\/p>\n

[sql]
\nUPDATE users SET first = 'Homer Jay' , last = 'Brown' WHERE first='Homer'
\n[\/sql]
\n\u30de\u30cb\u30e5\u30a2\u30eb\u3092\u898b\u308b\u3068update\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u8a18\u8ff0\u3059\u308b\u3001\u3068\u66f8\u3044\u3066\u3042\u308a\u307e\u3059\u3002
\n[scala]
\nimport org.scalaquery.ql.basic.BasicTable
\nimport org.scalaquery.ql.TypeMapper._
\nimport org.scalaquery.ql._
\n ...
\nobject Users extends BasicTable[(Int, String, Option[String])]("users") {
\n def id = column[Int]("id", O NotNull)
\n def first = column[String]("first", O Default "NFN", O DBType "varchar(64)")
\n def last = column[Option[String]]("last")
\n\u3000def * = id ~ first ~ last
\n}<\/p>\n

...
\n\/\/ UPDATE users SET first = 'Homer Jay' WHERE first = 'Homer' \u3092\u5b9f\u884c\u3059\u308b
\n val q7 = for(u <- Users if u.first is "Homer") yield u.first
\n val updated1 = q7.update("Homer Jay")
\n[\/scala]<\/p>\n

\u3053\u306e\u30b5\u30f3\u30d7\u30eb\u3067\u30ab\u30e9\u30e0\u3092\uff11\u3064\u66f4\u65b0\u3059\u308b\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u8a18\u8ff0\u65b9\u6cd5\u306f\u308f\u304b\u308a\u307e\u3057\u305f\u3002\u3067\u3082\u3053\u308c\u3060\u3051\u3067\u306f\u30ab\u30e9\u30e0\u3092\uff12\u3064\u66f4\u65b0\u3059\u308b\u5834\u5408\u306e\u8a18\u8ff0\u65b9\u6cd5\u304c\u308f\u304b\u308a\u307e\u305b\u3093\u3002\u305d\u3053\u3067\u3001ScalaQuery \u306e\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9\u3092\u773a\u3081\u3066\u307f\u308b\u306e\u3067\u3059\u304c\u3001\u305d\u3082\u305d\u3082 BasicTable \u306bmap \u30e1\u30bd\u30c3\u30c9\u304c\u306a\u3044\u3002update\u6587\u306e\u5b9a\u7fa9\u304c\u307f\u305f\u3044\u306e\u306b\u3001q7 \u304c\u4f55\u306e\u30af\u30e9\u30b9\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306a\u306e\u304b\u3059\u3089\u308f\u304b\u3089\u306a\u3044... \u3069\u3046\u3044\u3046\u3053\u3068\u306a\u306e\u3067\u3057\u3087\u3046\u3002<\/p>\n

\u3053\u306e\u51fa\u6240\u306e\u308f\u304b\u3089\u306a\u3044\u30e1\u30bd\u30c3\u30c9\u304c\u7a81\u7136\u308f\u3044\u3066\u304f\u308b\u73fe\u8c61\u306e\u6b63\u4f53\u3053\u305d\u3001Scala \u306e\u9ed2\u9b54\u8853\u30fb\u6697\u9ed9\u7684\u578b\u5909\u63db\u306e\u3057\u308f\u3056\u306a\u306e\u3067\u3059\u3002<\/p>\n

\u6697\u9ed9\u7684\u578b\u5909\u63db\u3068\u306f<\/h2>\n

Scala\u306b\u306f\u578b\u5909\u63db\u306e\u65b9\u6cd5\u3092\u8a18\u8ff0\u3057\u3066\u304a\u304f\u3053\u3068\u306b\u3088\u308a\u3001\u660e\u793a\u7684\u306b\u5909\u63db\u3057\u306a\u304f\u3066\u3082\u6697\u9ed9\u7684\u306b\u578b\u3092\u5909\u63db\u3057\u3066\u304f\u308c\u308b\u6a5f\u80fd\u304c\u3042\u308a\u307e\u3059\u3002
\n\u4f8b\u3048\u3070\u3001Scala \u306eList\u3084Map\u306b\u306fJava\u306eList\u3084Map\u306b\u306f\u306a\u3044\u4fbf\u5229\u30e1\u30bd\u30c3\u30c9\u304c\u3044\u308d\u3044\u308d\u7528\u610f\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u305f\u3060\u3001\u3053\u308c\u3089\u306e\u4fbf\u5229\u30e1\u30bd\u30c3\u30c9\u306f\u5f53\u7136Java\u306eList\u3084Map\u3067\u306f\u4f7f\u3048\u307e\u305b\u3093\u3002Scala\u3067\u306f\u307e\u3060\u307e\u3060Java\u306e\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u4f7f\u3046\u3053\u3068\u304c\u591a\u3044\u306e\u3067\u3059\u304c\u3001Java\u306e\u30e9\u30a4\u30d6\u30e9\u30ea\u306e\u30e1\u30bd\u30c3\u30c9\u306fJava\u306eCollection\u3092\u8fd4\u3059\u306e\u3067\u3001\u5f53\u7136Scala\u306e\u4fbf\u5229\u30e1\u30bd\u30c3\u30c9\u306f\u4f7f\u3048\u307e\u305b\u3093\u3002
\n\u3053\u3093\u306a\u3068\u304d\u3001\u6697\u9ed9\u7684\u578b\u5909\u63db\u306e\u51fa\u756a\u3067\u3059\u3002\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u30e1\u30bd\u30c3\u30c9\u3092import\u3057\u307e\u3059\u3002<\/p>\n

[scala]
\nimport scala.collection.JavaConversions._
\n[\/scala]<\/p>\n

JavaConversion\u306b\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306aJava\u306eCollection\u3092Scala\u306eCollection\u306b\u5909\u63db\u3059\u308b\u30e1\u30bd\u30c3\u30c9\u304c\u305f\u304f\u3055\u3093\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u307e\u3059\u3002
\n[scala]
\nimplict def asScalaBuffer[A](l: List[A]): Buffer[A]
\n[\/scala]<\/p>\n

\u3053\u306eimplicit \u304c\u30dd\u30a4\u30f3\u30c8\u3067\u3001implicit \u304c\u3042\u308b\u3053\u3068\u306b\u3088\u308a\u30b3\u30fc\u30c9\u4e2d\u306bJava\u306eCollection\u304b\u3089Scala\u306eCollection\u3078\u306e\u5909\u63db\u51e6\u7406\u3092\u660e\u793a\u7684\u306b\u304b\u304b\u306a\u304f\u3066\u3082\u3001Scala\u304c\u5fc5\u8981\u306a\u3089\u3070\u6697\u9ed9\u7684\u306b\u578b\u3092\u5909\u63db\u3057\u3066\u304f\u308c\u307e\u3059\u3002<\/p>\n

[scala]
\nval arrayList = new ArrayList()
\nval stringList = arraylist.map (_.toString)
\n[\/scala]<\/p>\n

\u4e0a\u306e\u30b3\u30fc\u30c9\u3082\u3001Arraylist\u306b\u5b58\u5728\u3057\u306a\u3044map\u30e1\u30bd\u30c3\u30c9\u304c\u5b9f\u884c\u3055\u308c\u308b\u3066\u3044\u307e\u3059\u304c\u3001\u6697\u9ed9\u7684\u306bScala \u306eBuffer\u306b\u5909\u63db\u3055\u308c\u308b\u306e\u3067\u3001Scala \u306eBuffer\u306b\u3042\u308bmap\u30e1\u30bd\u30c3\u30c9\u306a\u3069\u304c\u5229\u7528\u3067\u304d\u308b\u308f\u3051\u3067\u3059\u3002<\/p>\n

\u9ed2\u9b54\u8853\u306e\u7a2e\u660e\u304b\u3057<\/h2>\n

ScalaQuery\u3067\u3082\u3053\u306e\u6697\u9ed9\u7684\u578b\u5909\u63db\u304c\u591a\u304f\u3064\u304b\u308f\u308c\u3066\u3044\u307e\u3059\u3002\u305d\u308c\u3089\u306f\u3059\u3079\u3066BasicImplicitConversions<\/a> \u3067\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n

[scala]
\n\/\/ UPDATE users SET first = 'Homer Jay' WHERE first = 'Homer' \u3092\u5b9f\u884c\u3059\u308b
\n val q7 = for(u <- Users if u.first is "Homer") yield u.first
\n[\/scala]<\/p>\n

\u307e\u305a\u3053\u306eBasicTable\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9Users\u3067\u3059\u304c\u3001<\/p>\n

[scala]
\nimplicit def tableToQuery [T <: org.scalaquery.ql.TableBase[_]] (t: T): Query[T]
\n[\/scala]<\/p>\n

BasicImplicitConversions\u306e\u578b\u5909\u63db\u306e\u5b9a\u7fa9\u306b\u3088\u308a\u3001BasicTable\u304cQuery\u306b\u6697\u9ed9\u7684\u306b\u578b\u5909\u63db\u3055\u308c\u305f\u3042\u3068\u3001
\nQuery\u306emap\u30e1\u30bd\u30c3\u30c9\u304c\u5b9f\u884c\u3055\u308c\u3001Query\u304c\u751f\u6210\u3055\u308c\u307e\u3059\u3002(for(...) yield ()\u3000\u69cb\u6587\u306fmap\u30e1\u30bd\u30c3\u30c9\u3068\u540c\u3058\u51e6\u7406\u3092\u5b9f\u884c\u3057\u307e\u3059\u3002\uff09<\/p>\n

\u305d\u306e\u5f8c\u3001
\n[scala]
\n val updated1 = q7.update("Homer Jay")
\n[\/scala]<\/p>\n

\u3067\u306f\u3001<\/p>\n

[scala]
\nimplicit def productQueryToUpdateInvoker [T] (q: Query[ColumnBase[T]]): BasicUpdateInvoker[T]
\n[\/scala]<\/p>\n

\u3053\u306e\u578b\u5909\u63db\u306e\u5b9a\u7fa9\u306b\u3088\u308a\u3001Query\u304c\u306b\u6697\u9ed9\u7684\u306bBasicUpdateInvoker\u306b\u578b\u5909\u63db\u3055\u308c\u305f\u3042\u3068\u3001update\u30e1\u30bd\u30c3\u30c9\u304c\u5b9f\u884c\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n

\u308f\u304b\u3063\u3066\u307f\u305f\u3089\u307e\u3042\u305d\u3046\u304b\u306a\u3068\u304a\u3082\u3046\u306e\u3067\u3059\u304c\u3001 \u307e\u305a\u306f\u6697\u9ed9\u7684\u578b\u5909\u63db\u3092\u3057\u3066\u308b\u3001\u3068\u3044\u3046\u3053\u3068\u3092\u767a\u898b\u3059\u308b\u307e\u3067\u306b\u4e00\u82e6\u52b4\u3002\u9014\u4e2dIDE\u304c\u6c17\u3092\u5229\u304b\u305b\u3066import\u6587\u306e\u6574\u7406\u3092\u3057\u3066\u304f\u308c\u305f\u3070\u3063\u304b\u308a\u306b\u3001\u578b\u5909\u63db\u306e\u5b9a\u7fa9\u304c\u629c\u3051\u3066\u3057\u307e\u3044\u3001\u30b5\u30f3\u30d7\u30eb\u304c\u5168\u304f\u52d5\u304b\u306a\u304f\u306a\u3063\u305f\u308a\u3082\u3057\u307e\u3057\u305f\u3002\u305d\u306e\u5f8c\u3082 update\u3092\u63a2\u3057\u51fa\u3059\u306e\u306b\u4e39\u5ff5\u306b\u578b\u5909\u63db\u306e\u5b9a\u7fa9\u3092\u307f\u3066\u304b\u306a\u304f\u3066\u306f\u3044\u3051\u306a\u304f\u3066\u3001\u3001\u53c2\u308a\u307e\u3057\u305f\u3002 <\/p>\n

\u7d50\u8ad6<\/h2>\n

\u3053\u306e\u3088\u3046\u306a\u611f\u3058\u3067\u3001ScalaQuery\u306e\u6697\u9ed9\u7684\u578b\u5909\u63db\u306e\u7f60\u306b\u306f\u4f55\u4eba\u3082\u306e\u4eba\u304c\u306f\u307e\u3063\u3066\u3057\u307e\u3063\u305f\u306e\u3067\u3059\u3002ScalaQuery\u306e\u3088\u3046\u306aDSL\u306f\u3001\u8868\u73fe\u3092\u7c21\u6f54\u306b\u3057\u305f\u3044\u306e\u3067\u6697\u9ed9\u7684\u578b\u5909\u63db\u3092\u591a\u7528\u3055\u308c\u308b\u3068\u601d\u3046\u306e\u3067\u3059\u304c\u3001\u3084\u306f\u308a\u30bd\u30fc\u30b9\u3092\u898b\u306a\u304f\u3066\u306f\u51e6\u7406\u3092\u304a\u3048\u306a\u3044\u3088\u3046\u306a\u5834\u9762\u3067\u306f\u3001\u6697\u9ed9\u7684\u578b\u5909\u63db\u3092\u4f7f\u3063\u3066\u306f\u3044\u3051\u306a\u3044\u3067\u3057\u3087\u3046<\/strong>\u3002DSL\u306a\u306e\u306b\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u304c\u5c11\u306a\u304f\u30bd\u30fc\u30b9\u3092\u304c\u3063\u3064\u308a\u898b\u306a\u304f\u3066\u306f\u3044\u3051\u306a\u3044\u72b6\u6cc1\u306b\u3082\u554f\u984c\u304c\u3042\u308b\u3068\u306f\u601d\u3044\u307e\u3059\u304c\u3002<\/p>\n

\u3000\u3082\u3061\u308d\u3093\u3053\u306e\u6697\u9ed9\u7684\u578b\u5909\u63db\u3001\u4fbf\u5229\u3060\u306a\u3068\u601d\u3046\u5834\u9762\u3082\u3042\u308b\u308f\u3051\u3067\u3059\u3002\u6b21\u56de\u306f\u305d\u3093\u306a\u3088\u3044\u4f8b\u3092\u307f\u3064\u3064\u3001Scala\u306e\u6697\u9ed9\u7684\u578b\u5909\u63db\u306e\u4f7f\u3044\u3069\u3053\u308d\u306b\u3064\u3044\u3066\u8003\u3048\u305f\u3044\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n

\u203b \u305d\u308c\u3067\u3082ScalaQuery\u306f\u4eca\u3067\u3082\u4f7f\u3044\u7d9a\u3051\u3066\u3044\u307e\u3059\u3002\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u3082\u5c11\u3057\u5897\u3048\u307e\u3057\u305f\u3057\u3001\u306a\u306b\u3088\u308a\uff11\u56de\u308f\u304b\u3063\u3066\u3057\u307e\u3046\u3068\u3084\u306f\u308a\u66f8\u304d\u65b9\u304c\u7c21\u6f54\u3060\u3057\u3053\u308c\u306f\u3053\u308c\u3067\u3044\u3044\u306a\u3001\u3068\u601d\u3063\u3066\u3057\u307e\u3046\u306e\u3067\u3059\u3088\u306d\u3002\u305d\u308c\u304c\u6697\u9ed9\u7684\u578b\u5909\u63db\u3002\u96e3\u3057\u3044\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

\u3053\u3093\u306b\u3061\u306f\u3001\u99ac\u5834\u3067\u3059\u3002<\/p>\n

Scala \u3067DI (Cake Pattern\u5c0e\u5165\u7de8\uff09\u3067\u3001CakePattern\u306f\u30e1\u30f3\u30d0\u304c\u3064\u307e\u3065\u304f\u3068\u3053\u308d\u7b2c2\u4f4d\u3068\u66f8\u304d\u307e\u3057\u305f\u304c\u3001\u3067\u306f\u308f\u304b\u308a\u306b\u304f\u3044\u7b2c1\u4f4d\u304c\u4f55\u3060\u3063\u305f\u306e\u304b\u3002
\u7d9a\u304d\u3092\u8aad\u3080...<\/a><\/p>\n","protected":false},"author":23,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[254,18],"tags":[],"_links":{"self":[{"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/posts\/265"}],"collection":[{"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/users\/23"}],"replies":[{"embeddable":true,"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/comments?post=265"}],"version-history":[{"count":1,"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/posts\/265\/revisions"}],"predecessor-version":[{"id":13916,"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/posts\/265\/revisions\/13916"}],"wp:attachment":[{"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/media?parent=265"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/categories?post=265"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/tags?post=265"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}