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import slick.codegen.SourceCodeGenerator
import slick.{model => m}
class TypedIdSourceCodeGenerator(
singleSchemaModel: m.Model,
databaseModel: m.Model,
idType: Option[String],
manualForeignKeys: Map[(String, String), (String, String)]
) extends SourceCodeGenerator(singleSchemaModel) {
val manualReferences =
SchemaParser.references(databaseModel, manualForeignKeys)
val modelTypeToColumnMaper = Map(
"java.util.UUID" -> "uuidKeyMapper",
"String" -> "naturalKeyMapper",
"Int" -> "serialKeyMapper"
)
def pKeyTypeTag(columnRef: m.Column): String = {
val schemaName = columnRef.table.schema.getOrElse("`public`")
val tableName = entityName(columnRef.table.table)
s"$schemaName.$tableName."
}
def pKeyType(columnRef: m.Column): String = {
s"${idType.getOrElse("Id")}[${pKeyTypeTag(columnRef)}]"
}
class TypedIdTable(model: m.Table) extends Table(model) { table =>
val keyReferences: Map[m.Column, m.Column] = {
val fks = model.foreignKeys
.filter(_.referencedColumns.length == 1)
.filter(_.referencedColumns.forall(
_.options.contains(slick.ast.ColumnOption.PrimaryKey)))
.flatMap(fk =>
fk.referencingColumns.flatMap(from =>
fk.referencedColumns.headOption.map(to => (from -> to))))
val pk = model.primaryKey
.filter(_.columns.length == 1)
.flatMap(_.columns.headOption.map(c => (c -> c)))
fks.toMap ++ pk
}
class TypedIdColumn(override val model: m.Column) extends Column(model) {
column =>
override def rawType: String = {
keyReferences.get(model).fold(super.rawType)(pKeyType)
}
}
}
}
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