squeryl

问题 I have the following url : http://localhost/api/books/?bookId=21&bookId=62?authorId=2 I want to retrieve all the bookId values with Scala and then use Squeryl to do a fetch in a the database. I'm using the PlayFrameWork as the WebServer, so here's my code : val params = request.queryString.map { case (k, v) => k -> v(0) } // Retrieve only one the first occurence of a param So params.get("bookId") will only get the last value in the bookId params. e-g : 62 . To retrieve all my bookId params i

问题 When I try to insert a new record in a PostgreSQL table using Squeryl's Table.insert, it fires this query: insert into "users" ("id", "email", "fullname") values (nextval('"s_users_id"'),?,?) This doesn't work, as I did not define a sequence and instead defined the id column to be "autoincrement": CREATE TABLE Users ( id BIGSERIAL, email varchar(255) NOT NULL, fullname varchar(255), PRIMARY KEY (id) ); I read some old post in another forum about this issue, and I was wondering what the status

问题 I'm working on my first substantial project using Scala, Scalatra, and Squeryl, and happened upon the following problem: I wanted to have an abstract base class for my DAOs that provided a simple implementation of the basic CRUD operations (create, read, update, delete), so I needed a way for said abstract base class to be aware of which table to reference. With Squeryl, you map your data classes to actual tables in a singleton object that extends squeryl.Schema, and your DAOs are generally

问题 I can't debug (simple run works fine) my unit tests. Squeryl fails with the following exception: error while reflecting on metadata for (Some(private scala.Option com.company.play.model.db.mapping.Position.orgUnit2id),Some(public scala.Option com.company.play.model.db.mapping.Position.orgUnit2id()),None,Set(@org.squeryl.annotations.ColumnBase(optionType=class java.lang.Object, name=, length=-1, scale=-1, value=ORG_UNIT2ID))) of class com.company.play.model.db.mapping.Position java.lang

问题 I can't debug (simple run works fine) my unit tests. Squeryl fails with the following exception: error while reflecting on metadata for (Some(private scala.Option com.company.play.model.db.mapping.Position.orgUnit2id),Some(public scala.Option com.company.play.model.db.mapping.Position.orgUnit2id()),None,Set(@org.squeryl.annotations.ColumnBase(optionType=class java.lang.Object, name=, length=-1, scale=-1, value=ORG_UNIT2ID))) of class com.company.play.model.db.mapping.Position java.lang

问题 I want to read a rather large csv file and process it (slice, dice, summarize etc.) interactively (data exploration). My idea is to read the file into a database (H2) and use SQL to process it: Read the file: I use Ostermiller csv parser Determine the type of each column: I select randomly 50 rows and derive the type (int, long, double, date, string) of each column I want to use Squeryl to process. To do so I need to create a case class dynamically. That's the bottleneck so far! I upload the

问题 What I'm looking for seems fairly common but I can't seem to figure it out through the Squeryl api. I need to have a conditional piece to my on statement for a join. def getAllJoined( hasFallback:Option[String] = None ):List[(Type1,Type2)] = transaction{ join(mainTable, table2, table3, table3, table4.leftOuter, table4.leftOuter, table5, table6)((main, attr1, attr2, attr3, attr4, attr5, attr6, attr7) => select(main,attr1,attr2,attr3,attr4,attr5,attr6,attr7) on( //if(hasFallback.isDefined)

问题 This may be due to my misunderstanding of how Squeryl works. My entity is defined as: case class Wallet(userid: Int, amount: Long) extends KeyedEntity[Int] with Optimistic { def id = userid } My table variable is defined as: val walletTable = table[Wallet]("wallets") on(walletTable) { w => declare { w.userid is (primaryKey) } } Then I'm just calling a method to try to add money to the wallet: val requestedWallet = wallet.copy(amount = wallet.amount + amount) try { inTransaction { walletTable

问题 I have an existing Schema definition in MySql database. I created the schema using MySql Workbench. I wish to access the schema from my Lift-Scala-Squeryl code. I know that a simple way would be to manually define the schema structure using Squeryl data objects. Is there an automated way to generate Squeryl data objects out of existing MySql schema? I've found the following general question, but I'm sure there can be a way to generate a naive structure, although not accurate, it will allow a

问题 Squeryl defines a trait KeyedEntity which overrides equals , checking for several conditions in an if and calling super.equals in the end. Since super is Object , it will always fail. Consider: trait T { override def equals(z: Any):Boolean = super.equals(z)} } case class A(a: Int) extends T val a = A(1); val b = A(1) a==b // false Thus, if you declare case class Record(id: Long, name: String ...) extends KeyedEntity[Long] { ... } -- and you create several Record instances but do not persist