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|
import java.net.URI
import java.nio.file.Paths
import scala.concurrent.Await
import scala.concurrent.duration.Duration
import scala.concurrent.ExecutionContext.Implicits.global
import slick.backend.DatabaseConfig
import slick.codegen.{SourceCodeGenerator, StringGeneratorHelpers}
import slick.dbio.DBIO
import slick.driver.JdbcProfile
import slick.jdbc.meta.MTable
import slick.{model => sModel}
import slick.model.{Column, Model, Table, QualifiedName}
object Generator {
def outputSchemaCode(schemaName: String, profile: String, folder: String, pkg: String, tableGen: TableFileGenerator, rowGen: RowFileGenerator): Unit = {
val camelSchemaName = schemaName.split('_').map(_.capitalize).mkString("")
tableGen.writeTablesToFile(profile: String, folder: String, pkg: String, fileName = s"${camelSchemaName}Tables.scala")
rowGen.writeRowsToFile(folder: String, pkg: String, fileName = s"{camelSchemaName}Rows.scala")
}
def run(uri: URI,
pkg: String,
schemaNames: Option[List[String]],
outputPath: String,
manualForeignKeys: Map[(String, String), (String, String)],
parentType: Option[String],
idType: Option[String],
header: String,
schemaImports: List[String],
typeReplacements: Map[String, String]) = {
val dc: DatabaseConfig[JdbcProfile] =
DatabaseConfig.forURI[JdbcProfile](uri)
val parsedSchemasOpt: Option[Map[String, List[String]]] =
schemaNames.map(SchemaParser.parse)
try {
val dbModel: Model = Await.result(
dc.db.run(SchemaParser.createModel(dc.driver, parsedSchemasOpt)),
Duration.Inf)
parsedSchemasOpt.getOrElse(Map.empty).foreach {
case (schemaName, tables) =>
val profile =
s"""slick.backend.DatabaseConfig.forConfig[slick.driver.JdbcProfile]("${uri
.getFragment()}").driver"""
val schemaOnlyModel = Await.result(
dc.db.run(
SchemaParser.createModel(dc.driver,
Some(Map(schemaName -> tables)))),
Duration.Inf)
val rowGenerator = new RowSourceCodeGenerator(
schemaOnlyModel,
headerComment = header,
imports = schemaImports.map("import " + _).mkString("\n"),
schemaName = schemaName,
dbModel,
idType,
manualForeignKeys
)
/*
val tableGenerator: TableFileGenerator = ???
outputSchemaCode(
schemaName = schemaName,
profile = profile,
folder = outputPath,
pkg = pkg,
tableGen = tableGenerator,
rowGen = rowGenerator)
*/
}
} finally {
dc.db.close()
}
}
}
class TableSourceCodeGenerator(
pkg: String,
fullDatabaseModel: Model,
schemaOnlyModel: Model,
manualForeignKeys: Map[(String, String), (String, String)],
parentType: Option[String],
idType: Option[String],
typeReplacements: Map[String, String])
extends TypedIdSourceCodeGenerator(fullDatabaseModel, idType, manualForeignKeys) {
val defaultIdImplementation =
"""|final case class Id[T](v: Int)
|trait DefaultIdTypeMapper {
| val profile: slick.driver.JdbcProfile
| import profile.api._
| implicit def idTypeMapper[A]: BaseColumnType[Id[A]] = MappedColumnType.base[Id[A], Int](_.v, Id(_))
|}
|""".stripMargin
override def code = super.code.lines.drop(1).mkString("\n")
// Drops needless import: `"import slick.model.ForeignKeyAction\n"`.
// Alias to ForeignKeyAction is in profile.api
// TODO: fix upstream
override def Table = new this.TypedIdTable(_) { table =>
override def TableClass = new TableClass() {
// We disable the option mapping, as it is a bit more complex to support and we don't appear to need it
override def optionEnabled = false
}
// use hlists all the time
override def hlistEnabled: Boolean = true
// if false rows are type aliases to hlists, if true rows are case classes
override def mappingEnabled: Boolean = true
// create case class from colums
override def factory: String =
if (!hlistEnabled) super.factory
else {
val args = columns.zipWithIndex.map("a" + _._2)
val hlist = args.mkString("::") + ":: HNil"
val hlistType = columns
.map(_.actualType)
.mkString("::") + ":: HNil.type"
s"((h : $hlistType) => h match {case $hlist => ${TableClass.elementType}(${args.mkString(",")})})"
}
// from case class create columns
override def extractor: String =
if (!hlistEnabled) super.extractor
else
s"(a : ${TableClass.elementType}) => Some(" + columns
.map("a." + _.name)
.mkString("::") + ":: HNil)"
override def EntityType = new EntityType {
override def enabled = false
}
override def Column = new TypedIdColumn(_) {
override def rawType: String = {
typeReplacements.getOrElse(model.tpe, super.rawType)
}
}
override def ForeignKey = new ForeignKey(_) {
override def code = {
val fkColumns = compoundValue(referencingColumns.map(_.name))
val qualifier =
if (referencedTable.model.name.schema == referencingTable.model.name.schema)
""
else
referencedTable.model.name.schema.fold("")(sname =>
s"$pkg.$sname.")
val qualifiedName = qualifier + referencedTable.TableValue.name
val pkColumns = compoundValue(referencedColumns.map(c =>
s"r.${c.name}${if (!c.model.nullable && referencingColumns.forall(_.model.nullable)) ".?"
else ""}"))
val fkName = referencingColumns
.map(_.name)
.flatMap(_.split("_"))
.map(_.capitalize)
.mkString
.uncapitalize + "Fk"
s"""lazy val $fkName = foreignKey("$dbName", $fkColumns, $qualifiedName)(r => $pkColumns, onUpdate=$onUpdate, onDelete=$onDelete)"""
}
}
}
}
object SchemaParser {
def references(dbModel: Model,
tcMappings: Map[(String, String), (String, String)])
: Map[(String, String), (Table, Column)] = {
def getTableColumn(tc: (String, String)): (Table, Column) = {
val (tableName, columnName) = tc
val table = dbModel.tables
.find(_.name.asString == tableName)
.getOrElse(throw new RuntimeException("No table " + tableName))
val column = table.columns
.find(_.name == columnName)
.getOrElse(throw new RuntimeException(
"No column " + columnName + " in table " + tableName))
(table, column)
}
tcMappings.map {
case (from, to) => ({ getTableColumn(from); from }, getTableColumn(to))
}
}
def parse(schemaTableNames: List[String]): Map[String, List[String]] =
schemaTableNames
.map(_.split('.'))
.groupBy(_.head)
.mapValues(_.flatMap(_.tail))
def createModel(
jdbcProfile: JdbcProfile,
mappedSchemasOpt: Option[Map[String, List[String]]]): DBIO[Model] = {
import slick.jdbc.meta.MQName
val filteredTables = mappedSchemasOpt.map { mappedSchemas =>
MTable.getTables.map { (tables: Vector[MTable]) =>
mappedSchemas.flatMap {
case (schemaName, tableNames) =>
tableNames.map(
tableName =>
tables
.find(table =>
table.name match {
case MQName(_, Some(`schemaName`), `tableName`) => true
case _ => false
})
.getOrElse(throw new IllegalArgumentException(
s"$schemaName.$tableName does not exist in the connected database.")))
}.toList
}
}
jdbcProfile.createModel(filteredTables)
}
}
|
