shogogg / Squad

Squeryl Additional DSL, Patterns and Utilities.

Squad

Squeryl additional DSL, patterns and utilities.

Features

• Squad provides additional DSL with Squeryl.
• Squad provides database modeling patterns.
• Squad provides utilities.

Additional DSL

JOIN

Supports innerJoin, leftJoin, rightJoin and fullJoin in from keyword.

in Squeryl

import org.squeryl.PrimitiveTypeMode._

val ratingsForAllSongs =
  join(songs, ratings.leftOuter)((s,r) =>
      select(s, r)
      on(s.id === r.map(_.songId))
  )

with Squad

import net.studiofly.squad.SquadMode._

val ratingsForAllSongs =
  from(songs leftJoin ratings)((s,r) =>
      select(s, r)
      on(s.id === r.map(_.songId))
  )

Otherwise, joined tables have find method.

import net.studiofly.squad.SquadMode._

val ratingsForAllSongs =
  songs.leftJoin(ratings).find((s,r) =>
      select(s, r)
      on(s.id === r.map(_.songId))
  )

Database modeling patterns

LongKeyedEntity

in Squeryl

class Entity extends KeyedEntity[Long] {
  val id: Long = 0
  val name: String
}

with Squad

class Entity extends LongKeyedEntity {
  val name: String
}

TimestampedEntity

TimestampedEntity has fields ctime and mtime. ctime will set current timestamp on insert. mtime will set current timestamp on insert, and auto update on update.

Utilities

currentTimestamp

import java.sql.Timestamp

val timestamp = new Timestamp(System.currentTimeMillis)

with Squad

import java.sql.Timestamp
import net.studiofly.squad.SquadMode._

val timestamp = currentTimestamp