I have 2 case classes like this :
case class ClassTeacherWrapper(
success: Boolean,
classes: List[ClassTeacher]
)
2nd one :
case class ClassTeacher(
clid: String,
name: String
)
And a query like this :
val query =
SQL"""
SELECT
s.section_sk::text AS clid,
s.name AS name
from
********************
"""
PS I put * in place of query for security reasons :
So my query is returning 2 values. How do i map it to case class ClassTeacher
currently I am doing something like this :
def getClassTeachersByInstructor(instructor: String, section: String): ClassTeacherWrapper = {
implicit var conn: Connection = null
try {
conn = datamartDatasourceConnectionPool.getDBConnection()
// Define query
val query =
SQL"""
SELECT
s.section_sk::text AS clid,
s.name AS name
********
"""
logger.info("Read from DB: " + query)
// create a List containing all the datasets from the resultset and return
new ClassTeacherWrapper(
success =true,
query.as(Macro.namedParser[ClassTeacher].*)
)
//Trying new approch
//val users = query.map(user => new ClassTeacherWrapper(true, user[Int]("clid"), user[String]("name")).tolist
}
catch {
case NonFatal(e) =>
logger.error("getGradebookScores: error getting/parsing data from DB", e)
throw e
}
}
with is I am getting this exception :
{
"error": "ERROR: operator does not exist: uuid = character varying\n
Hint: No operator matches the given name and argument type(s). You
might need to add explicit type casts.\n Position: 324"
}
Can anyone help where am I going wrong. I am new to scala and Anorm What should I modify in query.as
part of code
Do you need the success field? Often an empty list would suffice?
I find parsers very useful (and reusable), so something like the following in the ClassTeacher singleton (or similar location):
val fields = "s.section_sk::text AS clid, s.name"
val classTeacherP =
get[Int]("clid") ~
get[String]("name") map {
case clid ~ name =>
ClassTeacher(clid,name)
}
def allForInstructorSection(instructor: String, section: String):List[ClassTeacher] =
DB.withConnection { implicit c => //-- or injected db
SQL(s"""select $fields from ******""")
.on('instructor -> instructor, 'section -> section)
.as(classTeacherP *)
}
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