PostgreSQL数字类型和Play的anorm解析器！ 斯卡拉2.3

Question

I want to use the numeric type of Postgresql 9.3 but my parser :

private val Account403Parser: RowParser[Account403] = {
  get[Long]("id") ~
  get[Float]("amount") map {
  case id ~ amount =>
    Account403.apply(id, amount)
}

doesn't work since anorm can't convert from java.math.BigDecimal to Float.

Here is the error that I get :

[RuntimeException: TypeDoesNotMatch(Cannot convert 9.5: class java.math.BigDecimal to Float for column ColumnName(account403.amount,Some(amount)))]

How can I change my parser to make it convert from the java.math.BigDecimal type to the Float type?

Answer 1

According to the type-compatibility matrix in the documentation you should use

BigDecimal , Double or Long to assign a BigDecimal .

Or you could cast to real (4-byte floating point number) on the Postgres side: amount::real , thereby losing some precision. Not sure about the syntax in scala.