slick

Following the directions in this page: http://slick.typesafe.com/doc/2.0.0/code-generation.html we see that something like the following segment of code is required to generate models for mysql tables val url = "jdbc:mysql://127.0.0.1/SOME_DB_SCHEMA?characterEncoding=UTF-8&useUnicode=true" val slickDriver = "scala.slick.driver.MySQLDriver" val jdbcDriver = "com.mysql.jdbc.Driver" val outputFolder = "/some/path" val pkg = "com.pligor.server" scala.slick.model.codegen.SourceCodeGenerator.main( Array(slickDriver, jdbcDriver, url, outputFolder, pkg) ) These parameteres are enough for an H2

I've a table user_permissions which has 46 permission columns along with id and created_date . This table has a corresponding UserPermissions class: class UserPermission(val id: Long, val createdDate: Option[Timestamp], val permission1: Boolean, val permission2: Boolean, ... val permission46: Boolean) and slick mapping table class UserPermissions(tag: Tag) extends Table[UserPermission](tag, "users_permissions") { def * = ( id :: createdDate :: permission1 :: permission2 :: ... permission46 :: HNil).shaped <> ( { case x => UserPermission( x(0), x(1), x(2), ... x(47)) }, { UserPermission.unapply

I face a problem I would like to simplify : (quite sure, I'm doing it wrong in fact). Wanted I would like to count the number of users having an id = 1. In SQL language let's say it is something like this : SELECT COUNT(*) FROM users WHERE id = 1 Code I'm using Slick in it's "lifted" form, so here is my piece of code counting the users : Query(Users.where( _.id === 1).length).first Actually what happens here is that Slick alias ScalaQuery, is actually creating a subquery with the filter cause and then counting the results of the sub-request. SELECT COUNT(*) FROM (SELECT * FROM users WHERE id =

I want to be able to fetch all records from a very big table using Slick. If I try to do this through foreach, for or list fetching; I get an Out Of Memory Exception. Is there any way to use "cursors" with Slick or lazy loading that only fetch the object when needed reducing the amount of memory used? Not sure what do you mean by cursors, but you can fetch partial data using pagination: query.drop(0).take(1000) will take the first 1000 records query.drop(1000).take(1000) will take from 1001 to 2000 lines of the table. But this query efficiency will depend on your database, if it will support

I want to delete rows from a few tables. My exact intention is depicted in the pseudo SQL statements below, delete from users where oid={user_oid}; login_infos_oid = select login_infos_oid from users_login_infos where users_oid={user_oid}; delete from users_login_infos where users_oid={user_oid}; delete from password_infos where login_infos_oid={login_infos_oid}; delete from login_infos where oid={login_infos_oid}; users_login_infos table has 2 columns users_oid and login_infos_oid and joins users and login_infos tables . How do I this nicely in Slick 3.x within a transaction? Thanks. I do not

I'm trying to get the max version number from a table. My table contents are: id externalId name version 1 10 n1 1 2 65 n2 2 3 10 n3 2 4 77 n4 1 In the table above, we have rows that has the maximum version as 2, so my query has to return this maximum version row for the given externalId that I pass into my query. I'm now stuck up with writing the Slick version of it. Any suggestions, pointers? This is what I have so far: (I pass in the externalId) for { myTable1 <- myTable1Elems if myTable1.version === ( myTable1Elems .filter(_.externalId === s"$externalId") .map(_.version) .max ) } yield