Avro4S：找不到参数生成器的隐式值

Question

I am using avro4s

https://github.com/sksamuel/avro4s

I wrote this code

implicit val schema = AvroSchema[SalesRecord]
val output = AvroOutputStream[SalesRecord](new File(outputLocation))
output.write(salesList)
output.flush
output.close

But I get a compile time error

could not find implicit value for parameter builder: shapeless.Lazy[....]
Not enough arguments for method apply 

Answer 1

There was a bug in 1.2.x with private vals in a case class which caused the error you've seen here. That's fixed in 1.3.0 and should solve your problem.

(If it's not private vals, you'd need to post up your SalesRecord object for us to take a look at and I'll update this answer with a solution).