slick-3.0

问题 I am new to Slick 3 and so far I have understood that db.run are asynchronous call. the .map or .flatMap is run once the Future is returned. The problem in my code below is that all the sub queries do not work (nested db.run). Conceptually speaking, what am I not getting? Is it valid to do this kind of code as below? basically in the .map of the first query I do some actions depending on the first query. I see everywhere for loops with yield , is it the only way to go? Is the problem in my

问题 I have a Slick query with two left joins (which end up as a Rep[Option[...]] ) and column maps. I need to filter (using like ) on the results. A row has to be included in the results if any of three columns match the like criteria, so I can't pre-filter the tables - I have to filter the resulting join, Rep[Option] s and all. I can't figure how to filter the Rep[Option[String]] columns. The below code does not compile due to "cannot resolve symbol ||" - if compiles perfectly when I remove the

问题 Two Writestream to the same database sink is not happening in sequence in Spark Structured Streaming 2.2.1. Please suggest how to make them execute in sequence. val deleteSink = ds1.writestream .outputMode("update") .foreach(mydbsink) .start() val UpsertSink = ds2.writestream .outputMode("update") .foreach(mydbsink) .start() deleteSink.awaitTermination() UpsertSink.awaitTermination() Using the above code, deleteSink is executed after UpsertSink . 回答1: If you want to have two streams running

来源： https://stackoverflow.com/questions/40166039/classnotfoundexception-while-trying-to-use-slick-codegen

来源： https://stackoverflow.com/questions/40166039/classnotfoundexception-while-trying-to-use-slick-codegen

来源： https://stackoverflow.com/questions/40166039/classnotfoundexception-while-trying-to-use-slick-codegen

问题 This code is creating a query for use in retrieving a user's profile on a web back end. It creates a query that assembles the necessary information into a DTO (which is just a case class) that is subsequently sent back as JSON. def getProfile(userId: Long)={ val q = for{ ((((u,p),a),b), ba) <- filterById(userId) join People on (_.personId === _.id) joinLeft Addresses on (_._2.addressId === _.id) joinLeft Businesses on (_._1._2.businessId === _.id) joinLeft Addresses on (_._2.flatMap(_

问题 This question is about slick 3.0 or 3.1 (I am flexible about that) I have an intermediate query which I process with map , for , etc. to obtain the result I want. In the end I have a val foo: DBIOAction[Seq[MySchema.Bar], NoStream, Effect.Read] Now I have a val bar: TableQuery[MySchema.Bar] and I want to insert foo in to it. If foo would be a Seq I could simply do bar ++= foo , but it is not. The only way I found is to materialize the result by awaiting it. Like this val query = (bar ++=

问题 I'm quite new to Scala and need to use slick to build a table mapping for these case classes. I can do it for a simple case class but the nesting and option parameters are leaving me confused how to do this? case class Info(fullName: Option[String], dn: Option[String], manager: Option[String], title: Option[String], group: Option[String], sid: Option[String]) case class User(username: String, RiskScore: Float, averageRiskScore: Float, lastSessionId: String, lastActivityTime: Long, info: Info)

问题 I'm writing a veery simple scala script to connect to Mysql using slick 3. My build.sbt looks like this: name := "slick_sandbox" version := "1.0" scalaVersion := "2.11.7" libraryDependencies ++= Seq( "com.typesafe.slick" %% "slick" % "3.0.3", "org.slf4j" % "slf4j-nop" % "1.6.4", "mysql" % "mysql-connector-java" % "5.1.6" ) application.conf : Drivder is an intentional mistake; also, I did not provide a db username or password! mysqldb = { url = "jdbc:mysql://localhost/slickdb" driver = com