[Lift] Re: JPA is killing me. Enumeration hell.
I don't really know much about JPA, but just a quick observation on the code
you posted:
Your code has line:
abstract class EnumvType(val et: Enumeration with EnumTrait) extends
UserType {
whereas JPA Demo has line:
abstract class EnumvType(val et: Enumeration with Enumv) extends UserType
{
I don't know what your EnumTrait is, or whether it might be causing the
problem, but it's worth noting.
One thing I can do is release a version of 0.10 that compiles against Scala
2.7.2 and rolls back the minor changes made to Lift to compile against
2.7.2. But I don't know how David et al feel about this.
--j
On Thu, Jan 22, 2009 at 3:16 PM, Charles F. Munat c...@munat.com wrote:
I have an entity thus:
@Entity
@Table{val name = cocktails}
class Cocktail extends BaseEntity {
@Id
@GeneratedValue{val strategy = GenerationType.AUTO}
var id : Long = _
var name : String =
var description : String =
var ingredients : String =
@Column{val name = file_name}
var fileName : String =
@Column{val name = is_archived}
var isArchived : Boolean = false
@Type{val `type` = com.xxx.model.CocktailGroupType}
@Column{val name=cocktail_group}
var cocktailGroup: CocktailGroup.Value = CocktailGroup.Originals
}
Which uses this enumeration:
object CocktailGroup extends Enumeration with Enumv {
val Originals = Value(Originals)
val Contemporaries = Value(Contemporaries)
val Classics = Value(Classics)
val Others = Value(Others)
}
class CocktailGroupType extends EnumvType(CocktailGroup) {}
Which is queried thus in orm.xml:
named-query name=findCocktailsByGroup
query![CDATA[from Cocktail c
where c.isArchived = false
and c.cocktailGroup = :cocktailGroup
order by c.name]]/query
/named-query
And called from CocktailOps.scala:
120: val cocktails = Model.createNamedQuery[Cocktail](
findCocktailsByGroup,
cocktailGroup - Originals).findAll
Using Enumv:
trait Enumv {
this: Enumeration =
private var nameDescriptionMap =
scala.collection.mutable.Map[String, String]()
def Value(name: String, desc: String) : Value = {
nameDescriptionMap += (name - desc)
new Val(name)
}
def getDescriptionOrName(ev: this.Value) = {
try {
nameDescriptionMap(+ev)
} catch {
case e: NoSuchElementException = ev.toString
}
}
def getNameDescriptionList = this.elements.toList.map(
v = (v.toString, getDescriptionOrName(v) ) ).toList
}
And EnumvType:
abstract class EnumvType(val et: Enumeration with EnumTrait)
extends UserType {
val SQL_TYPES = Array({Types.VARCHAR})
override def sqlTypes() = SQL_TYPES
override def returnedClass = classOf[et.Value]
override def equals(x: Object, y: Object): Boolean = {
return x == y
}
override def hashCode(x: Object) = x.hashCode
override def nullSafeGet(resultSet: ResultSet,
names: Array[String],
owner: Object): Object = {
val value = resultSet.getString(names(0))
if (resultSet.wasNull()) return null
else {
return et.valueOf(value)
}
}
override def nullSafeSet(statement: PreparedStatement,
value: Object,
index: Int): Unit = {
if (value == null) {
statement.setNull(index, Types.VARCHAR)
} else {
val en = value.toString
statement.setString(index, en)
}
}
override def deepCopy(value: Object): Object = value
override def isMutable() = false
override def disassemble(value: Object) =
value.asInstanceOf[Serializable]
override def assemble(cached: Serializable, owner: Object):
Serializable = cached
override def replace(original: Object,
target: Object,
owner: Object) = original
}
Which gets me this error:
Exception occured while processing /drinks/
Message: javax.persistence.PersistenceException:
org.hibernate.PropertyAccessException: could not set a field value by
reflection setter of com.xxx.model.Cocktail.cocktailGroup
org.hibernate.ejb.AbstractEntityManagerImpl.throwPersistenceException(AbstractEntityManagerImpl.java:630)
org.hibernate.ejb.QueryImpl.getResultList(QueryImpl.java:75)
com.xxx.model.ScalaQuery.getResultList(JPA.scala:82)
com.xxx.model.ScalaQuery.findAll(JPA.scala:77)
com.xxx.snippet.CocktailOps.originals(CocktailOps.scala:120)
I have tried everything I can think of. This used to work before the
recent switch to 2.7.3. Can anyone spot the problem?
Thanks. Website down. Am really screwed here.
Chas.
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[Lift] Re: JPA is killing me. Enumeration hell.
On Thu, Jan 22, 2009 at 4:05 PM, Jorge Ortiz jorge.or...@gmail.com wrote:
I don't really know much about JPA, but just a quick observation on the
code you posted:
Your code has line:
abstract class EnumvType(val et: Enumeration with EnumTrait) extends
UserType {
whereas JPA Demo has line:
abstract class EnumvType(val et: Enumeration with Enumv) extends UserType
{
I don't know what your EnumTrait is, or whether it might be causing the
problem, but it's worth noting.
One thing I can do is release a version of 0.10 that compiles against Scala
2.7.2 and rolls back the minor changes made to Lift to compile against
2.7.2. But I don't know how David et al feel about this.
As long as it doesn't muck up the mainline 0.10 stuff in scala-tools.org,
I'm cool with it.
--j
On Thu, Jan 22, 2009 at 3:16 PM, Charles F. Munat c...@munat.com wrote:
I have an entity thus:
@Entity
@Table{val name = cocktails}
class Cocktail extends BaseEntity {
@Id
@GeneratedValue{val strategy = GenerationType.AUTO}
var id : Long = _
var name : String =
var description : String =
var ingredients : String =
@Column{val name = file_name}
var fileName : String =
@Column{val name = is_archived}
var isArchived : Boolean = false
@Type{val `type` = com.xxx.model.CocktailGroupType}
@Column{val name=cocktail_group}
var cocktailGroup: CocktailGroup.Value = CocktailGroup.Originals
}
Which uses this enumeration:
object CocktailGroup extends Enumeration with Enumv {
val Originals = Value(Originals)
val Contemporaries = Value(Contemporaries)
val Classics = Value(Classics)
val Others = Value(Others)
}
class CocktailGroupType extends EnumvType(CocktailGroup) {}
Which is queried thus in orm.xml:
named-query name=findCocktailsByGroup
query![CDATA[from Cocktail c
where c.isArchived = false
and c.cocktailGroup = :cocktailGroup
order by c.name]]/query
/named-query
And called from CocktailOps.scala:
120: val cocktails = Model.createNamedQuery[Cocktail](
findCocktailsByGroup,
cocktailGroup - Originals).findAll
Using Enumv:
trait Enumv {
this: Enumeration =
private var nameDescriptionMap =
scala.collection.mutable.Map[String, String]()
def Value(name: String, desc: String) : Value = {
nameDescriptionMap += (name - desc)
new Val(name)
}
def getDescriptionOrName(ev: this.Value) = {
try {
nameDescriptionMap(+ev)
} catch {
case e: NoSuchElementException = ev.toString
}
}
def getNameDescriptionList = this.elements.toList.map(
v = (v.toString, getDescriptionOrName(v) ) ).toList
}
And EnumvType:
abstract class EnumvType(val et: Enumeration with EnumTrait)
extends UserType {
val SQL_TYPES = Array({Types.VARCHAR})
override def sqlTypes() = SQL_TYPES
override def returnedClass = classOf[et.Value]
override def equals(x: Object, y: Object): Boolean = {
return x == y
}
override def hashCode(x: Object) = x.hashCode
override def nullSafeGet(resultSet: ResultSet,
names: Array[String],
owner: Object): Object = {
val value = resultSet.getString(names(0))
if (resultSet.wasNull()) return null
else {
return et.valueOf(value)
}
}
override def nullSafeSet(statement: PreparedStatement,
value: Object,
index: Int): Unit = {
if (value == null) {
statement.setNull(index, Types.VARCHAR)
} else {
val en = value.toString
statement.setString(index, en)
}
}
override def deepCopy(value: Object): Object = value
override def isMutable() = false
override def disassemble(value: Object) =
value.asInstanceOf[Serializable]
override def assemble(cached: Serializable, owner: Object):
Serializable = cached
override def replace(original: Object,
target: Object,
owner: Object) = original
}
Which gets me this error:
Exception occured while processing /drinks/
Message: javax.persistence.PersistenceException:
org.hibernate.PropertyAccessException: could not set a field value by
reflection setter of com.xxx.model.Cocktail.cocktailGroup
org.hibernate.ejb.AbstractEntityManagerImpl.throwPersistenceException(AbstractEntityManagerImpl.java:630)
org.hibernate.ejb.QueryImpl.getResultList(QueryImpl.java:75)
com.xxx.model.ScalaQuery.getResultList(JPA.scala:82)
com.xxx.model.ScalaQuery.findAll(JPA.scala:77)
com.xxx.snippet.CocktailOps.originals(CocktailOps.scala:120)
I have tried everything I can think of. This used to work before the
recent switch to 2.7.3. Can anyone spot the problem?
Thanks. Website down. Am really screwed here.
Chas.
--
Lift, the simply functional web framework http://liftweb.net
Collaborative Task
[Lift] Re: JPA is killing me. Enumeration hell.
Ahh, I see what the problem might be. There was another change to EnumvType:
Replace this line:
return et.valueOf(value)
With this line:
return et.valueOf(value).getOrElse(null)
I'm sorry this is causing you so much trouble Chas. I made changes to
classes in JPADemo and didn't realize they were used as template code for
other projects.
Perhaps these classes should be rolled into a lift-jpa module so that
everyone can share the same code?
--j
On Thu, Jan 22, 2009 at 3:16 PM, Charles F. Munat c...@munat.com wrote:
I have an entity thus:
@Entity
@Table{val name = cocktails}
class Cocktail extends BaseEntity {
@Id
@GeneratedValue{val strategy = GenerationType.AUTO}
var id : Long = _
var name : String =
var description : String =
var ingredients : String =
@Column{val name = file_name}
var fileName : String =
@Column{val name = is_archived}
var isArchived : Boolean = false
@Type{val `type` = com.xxx.model.CocktailGroupType}
@Column{val name=cocktail_group}
var cocktailGroup: CocktailGroup.Value = CocktailGroup.Originals
}
Which uses this enumeration:
object CocktailGroup extends Enumeration with Enumv {
val Originals = Value(Originals)
val Contemporaries = Value(Contemporaries)
val Classics = Value(Classics)
val Others = Value(Others)
}
class CocktailGroupType extends EnumvType(CocktailGroup) {}
Which is queried thus in orm.xml:
named-query name=findCocktailsByGroup
query![CDATA[from Cocktail c
where c.isArchived = false
and c.cocktailGroup = :cocktailGroup
order by c.name]]/query
/named-query
And called from CocktailOps.scala:
120: val cocktails = Model.createNamedQuery[Cocktail](
findCocktailsByGroup,
cocktailGroup - Originals).findAll
Using Enumv:
trait Enumv {
this: Enumeration =
private var nameDescriptionMap =
scala.collection.mutable.Map[String, String]()
def Value(name: String, desc: String) : Value = {
nameDescriptionMap += (name - desc)
new Val(name)
}
def getDescriptionOrName(ev: this.Value) = {
try {
nameDescriptionMap(+ev)
} catch {
case e: NoSuchElementException = ev.toString
}
}
def getNameDescriptionList = this.elements.toList.map(
v = (v.toString, getDescriptionOrName(v) ) ).toList
}
And EnumvType:
abstract class EnumvType(val et: Enumeration with EnumTrait)
extends UserType {
val SQL_TYPES = Array({Types.VARCHAR})
override def sqlTypes() = SQL_TYPES
override def returnedClass = classOf[et.Value]
override def equals(x: Object, y: Object): Boolean = {
return x == y
}
override def hashCode(x: Object) = x.hashCode
override def nullSafeGet(resultSet: ResultSet,
names: Array[String],
owner: Object): Object = {
val value = resultSet.getString(names(0))
if (resultSet.wasNull()) return null
else {
return et.valueOf(value)
}
}
override def nullSafeSet(statement: PreparedStatement,
value: Object,
index: Int): Unit = {
if (value == null) {
statement.setNull(index, Types.VARCHAR)
} else {
val en = value.toString
statement.setString(index, en)
}
}
override def deepCopy(value: Object): Object = value
override def isMutable() = false
override def disassemble(value: Object) =
value.asInstanceOf[Serializable]
override def assemble(cached: Serializable, owner: Object):
Serializable = cached
override def replace(original: Object,
target: Object,
owner: Object) = original
}
Which gets me this error:
Exception occured while processing /drinks/
Message: javax.persistence.PersistenceException:
org.hibernate.PropertyAccessException: could not set a field value by
reflection setter of com.xxx.model.Cocktail.cocktailGroup
org.hibernate.ejb.AbstractEntityManagerImpl.throwPersistenceException(AbstractEntityManagerImpl.java:630)
org.hibernate.ejb.QueryImpl.getResultList(QueryImpl.java:75)
com.xxx.model.ScalaQuery.getResultList(JPA.scala:82)
com.xxx.model.ScalaQuery.findAll(JPA.scala:77)
com.xxx.snippet.CocktailOps.originals(CocktailOps.scala:120)
I have tried everything I can think of. This used to work before the
recent switch to 2.7.3. Can anyone spot the problem?
Thanks. Website down. Am really screwed here.
Chas.
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You received this message because you are subscribed to the Google Groups
Lift group.
To post to this group, send email to liftweb@googlegroups.com
To unsubscribe from this group, send email to
liftweb+unsubscr...@googlegroups.com
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[Lift] Re: JPA is killing me. Enumeration hell.
Thank you! Thank you! Thank you! Thank you! Thank you!
That worked. I should've seen it though as I'd already made that fix on
other sites. I don't know how I missed it. Tired, I guess.
Pressure off now for a moment at least.
Chas.
Jorge Ortiz wrote:
Ahh, I see what the problem might be. There was another change to EnumvType:
Replace this line:
return et.valueOf(value)
With this line:
return et.valueOf(value).getOrElse(null)
I'm sorry this is causing you so much trouble Chas. I made changes to
classes in JPADemo and didn't realize they were used as template code
for other projects.
Perhaps these classes should be rolled into a lift-jpa module so that
everyone can share the same code?
--j
On Thu, Jan 22, 2009 at 3:16 PM, Charles F. Munat c...@munat.com
mailto:c...@munat.com wrote:
I have an entity thus:
@Entity
@Table{val name = cocktails}
class Cocktail extends BaseEntity {
@Id
@GeneratedValue{val strategy = GenerationType.AUTO}
var id : Long = _
var name : String =
var description : String =
var ingredients : String =
@Column{val name = file_name}
var fileName : String =
@Column{val name = is_archived}
var isArchived : Boolean = false
@Type{val `type` = com.xxx.model.CocktailGroupType}
@Column{val name=cocktail_group}
var cocktailGroup: CocktailGroup.Value = CocktailGroup.Originals
}
Which uses this enumeration:
object CocktailGroup extends Enumeration with Enumv {
val Originals = Value(Originals)
val Contemporaries = Value(Contemporaries)
val Classics = Value(Classics)
val Others = Value(Others)
}
class CocktailGroupType extends EnumvType(CocktailGroup) {}
Which is queried thus in orm.xml:
named-query name=findCocktailsByGroup
query![CDATA[from Cocktail c
where c.isArchived = false
and c.cocktailGroup = :cocktailGroup
order by c.name http://c.name]]/query
/named-query
And called from CocktailOps.scala:
120: val cocktails = Model.createNamedQuery[Cocktail](
findCocktailsByGroup,
cocktailGroup - Originals).findAll
Using Enumv:
trait Enumv {
this: Enumeration =
private var nameDescriptionMap =
scala.collection.mutable.Map[String, String]()
def Value(name: String, desc: String) : Value = {
nameDescriptionMap += (name - desc)
new Val(name)
}
def getDescriptionOrName(ev: this.Value) = {
try {
nameDescriptionMap(+ev)
} catch {
case e: NoSuchElementException = ev.toString
}
}
def getNameDescriptionList = this.elements.toList.map(
v = (v.toString, getDescriptionOrName(v) ) ).toList
}
And EnumvType:
abstract class EnumvType(val et: Enumeration with EnumTrait)
extends UserType {
val SQL_TYPES = Array({Types.VARCHAR})
override def sqlTypes() = SQL_TYPES
override def returnedClass = classOf[et.Value]
override def equals(x: Object, y: Object): Boolean = {
return x == y
}
override def hashCode(x: Object) = x.hashCode
override def nullSafeGet(resultSet: ResultSet,
names: Array[String],
owner: Object): Object = {
val value = resultSet.getString(names(0))
if (resultSet.wasNull()) return null
else {
return et.valueOf(value)
}
}
override def nullSafeSet(statement: PreparedStatement,
value: Object,
index: Int): Unit = {
if (value == null) {
statement.setNull(index, Types.VARCHAR)
} else {
val en = value.toString
statement.setString(index, en)
}
}
override def deepCopy(value: Object): Object = value
override def isMutable() = false
override def disassemble(value: Object) =
value.asInstanceOf[Serializable]
override def assemble(cached: Serializable, owner: Object):
Serializable = cached
override def replace(original: Object,
target: Object,
owner: Object) = original
}
Which gets me this error:
Exception occured while processing /drinks/
Message: javax.persistence.PersistenceException:
org.hibernate.PropertyAccessException: could not set a field value by
reflection setter of com.xxx.model.Cocktail.cocktailGroup
org.hibernate.ejb.AbstractEntityManagerImpl.throwPersistenceException(AbstractEntityManagerImpl.java:630)
org.hibernate.ejb.QueryImpl.getResultList(QueryImpl.java:75)
