ahinz / geoslick Goto Github PK

I've been trying to use geom.asGeoJson() in a query that gets turned into a prepared statement. The problem is that I get

ERROR: function st_asgeojson(bytea, integer) is not unique at character 31
HINT: Could not choose a best candidate function. You might need to add explicit type casts.

in my Postgres logs.

Here's what Postgres is trying to do:

STATEMENT: select x2."name", x2."state", ST_AsGeoJson(ST_AsEWKB(x2."geom"),1), x2."country", x3."email", x4."term", x5."career" from "term" x4, "career" x5, "cities" x2, "students" x3 where (((x4."term" = $1) and (x5."career" = $2)) and (x2."id" = $3)) and (((x3."city" = x2."id") and (x3."term" = x4."id")) and (x3."career" = x5."id"))

The query works wonderfully if it's not in a prepared statement.

Everything seems to be compiling properly, but if you will try to edit code which uses GeoSlick with IntelliJ then you will see a lot of red color ;) It is because of this fragment:

class SimpleQL extends super.SimpleQL with Implicits {
    type Postgis = PostgisDriver.Postgis
    type PostgisTable[T] = PostgisDriver.PostgisTable[T]
}

// (...)

override val simple = new SimpleQL
import simple._

I'm not sure if overriding val here is so good idea. It's quite similar to cake pattern, where def should be always preferred. If you would change this code to something like that:

class ExtendedQL extends super.SimpleQL with Implicits {
    type Postgis = PostgisDriver.Postgis
    type PostgisTable[T] = PostgisDriver.PostgisTable[T]
}

// (...)

val extended = new ExtendedQL
import extended._

and then fix few imports, then IntelliJ will be fixed.
And I think it will be also safer, since there will be no risk of some weird name collisions.

object Test extends Table[(String, Int, Int, Geometry, Array[Byte], Boolean)]("test") with   
Postgis {                                                                                    
  def key = column[String]("key", O.PrimaryKey)                                                                                                 
  def geom = geoColumn[Geometry]("geom", 0)                                                                 
  def * = key ~ geom                                     
}                                                                                                                                     

When trying to delete something:

val q = for (d <- Test if d.key === doc.key.toString) yield d                                
q.delete                                                                                     

I get:

scala.slick.SlickException: A query for a DELETE statement must resolve to a comprehension
with a single table -- Unsupported shape: Comprehension(fetch = None, offset = None)
at scala.slick.driver.BasicStatementBuilderComponent$QueryBuilder.buildDelete(BasicSt
atementBuilderComponent.scala:321)
at scala.slick.driver.BasicProfile$class.buildDeleteStatement(BasicProfile.scala:18)
at geoslick.PostgisDriver$.buildDeleteStatement(postgis.scala:275)
at scala.slick.driver.BasicInvokerComponent$DeleteInvoker.built$lzycompute(BasicInvok
erComponent.scala:50)
at scala.slick.driver.BasicInvokerComponent$DeleteInvoker.built(BasicInvokerComponent
.scala:50)
at scala.slick.driver.BasicInvokerComponent$DeleteInvoker.deleteStatement(BasicInvoke
rComponent.scala:52)
at scala.slick.driver.BasicInvokerComponent$DeleteInvoker.delete(BasicInvokerComponen
t.scala:54)
at Main$$anonfun$1.apply(Main.scala:40)
[..]

Could you make this available as in a maven/ivy/... repo somewhere?

I suggest having a look at how slick-joda-mapper gets deployed to sonatype oss
https://github.com/tototoshi/slick-joda-mapper