I'll have to look at this in more detail tonight. I took a quick couple hacks
at it and I can honestly say I have no idea what kind of problem the Scala
compiler is trying to tell you about :-/
If you avoid types, they clearly are of the same type and value (e.g.
settings.testEnum.valueBox.open_! == Full(TestEnum.One) -> true)
-Ross
On Mar 8, 2010, at 11:05 AM, Craig Blake wrote:
> Writing into the database with the new field type works fine, but I'm running
> into a little hitch trying to access the value. Given the test code (again
> this is in the Github test project,
> g...@github.com:craigwblake/lift-couchdb-test.git):
>
> object TestEnum extends Enumeration { val One = Value( "One")}
>
> object Settings extends Settings with CouchMetaRecord[ Settings]
> class Settings extends CouchRecord[ Settings] {
> def meta = Settings
> object testEnum extends JSONEnumNameField( this, TestEnum)
> }
>
> val settings = Settings.fetch( "id").open_!
> val testEnum: TestEnum.Value = settings.testEnum.valueBox.open_!
>
>
> Results in a compilation error:
>
> [ERROR] /lift-couchdb-test/src/main/scala/test/Testing.scala:24: error:
> type mismatch;
> [INFO] found : settings.testEnum.MyType
> [INFO] required: test.TestEnum.Value
> [INFO] val testEnum: TestEnum.Value =
> settings.testEnum.valueBox.open_!
>
> Any ideas?
>
> Thanks,
> Craig
>
> On Mar 3, 2010, at 8:39 PM, Ross Mellgren wrote:
>
>> Try this:
>>
>> /** Enum data field for JSON records. Encodes as JString */
>> class JSONEnumNameField[OwnerType <: JSONRecord[OwnerType], EnumType <:
>> Enumeration]
>> (rec: OwnerType, enum: EnumType)(implicit
>> enumValueType: Manifest[EnumType#Value])
>> extends EnumField[OwnerType, EnumType](rec, enum) with JSONField
>> {
>> def this(rec: OwnerType, enum: EnumType, value: EnumType#Value)(implicit
>> enumValueType: Manifest[EnumType#Value]) = {
>> this(rec, enum)
>> set(value)
>> }
>>
>> def this(rec: OwnerType, enum: EnumType, value:
>> Box[EnumType#Value])(implicit enumValueType: Manifest[EnumType#Value]) = {
>> this(rec, enum)
>> setBox(value)
>> }
>>
>> def asJValue: JValue = valueBox.map(v => JString(v.toString)) openOr
>> (JNothing: JValue)
>> def fromJValue(jvalue: JValue): Box[EnumType#Value] = jvalue match {
>> case JNothing|JNull if optional_? => setBox(Empty)
>> case JString(s) => setBox(enum.valueOf(s) ?~ ("Unknown
>> value \"" + s + "\""))
>> case other => setBox(expectedA("JString", other))
>> }
>> }
>>
>> Let me know if it works for you. If so, I'll start the process of getting it
>> into master as soon as I can.
>>
>> -Ross
>>
>> On Mar 3, 2010, at 8:12 PM, Craig Blake wrote:
>>
>>> Sure, will do. The only thing I think I'll need to figure out is how to
>>> persist an enumeration by name rather than ordinal value, but I imagine
>>> that it should be pretty straight-forward to add a new field type in my app
>>> to handle it.
>>>
>>> Thanks,
>>> Craig
>>>
>>> On Mar 3, 2010, at 7:45 PM, Ross Mellgren wrote:
>>>
>>>> It's no problem, as I mentioned the compiler error is practically useless.
>>>>
>>>> Hope you get along well, let me know if you have any other issues.
>>>>
>>>> -Ross
>>>>
>>>> On Mar 3, 2010, at 7:29 PM, Craig Blake wrote:
>>>>
>>>>> Yep, that seems to be better. Sorry for the noise, I don't know why I
>>>>> didn't think to check that.
>>>>>
>>>>> Thanks for the quick answer.
>>>>>
>>>>> Craig
>>>>>
>>>>> On Mar 3, 2010, at 4:44 PM, Ross Mellgren wrote:
>>>>>
>>>>>> Unfortunately the compiler error is bizarre (due to some of the type
>>>>>> shuffling involved), but the underlying problem you're experiencing is
>>>>>> that DateTimeFields (and therefore JSONDateTimeFields) have a storage
>>>>>> type of Calendar, and you're trying to assign a Date to them. Try
>>>>>> Calendar.getInstance instead of new Date() and see if that resolves it
>>>>>> for you?
>>>>>>
>>>>>> -Ross
>>>>>>
>>>>>> On Mar 3, 2010, at 4:32 PM, Craig Blake wrote:
>>>>>>
>>>>>>> Hi,
>>>>>>>
>>>>>>> I am getting familiar with the lift-couchdb module, and trying to put
>>>>>>> together a sample based on the tests in the module. Trying to create a
>>>>>>> record, based on this test code:
>>>>>>>
>>>>>>> def testRec1: Person = Person.createRecord.name("Alice").age(25)
>>>>>>>
>>>>>>> this is what I have:
>>>>>>>
>>>>>>> class Account extends CouchRecord[Account] {
>>>>>>> def meta = Account
>>>>>>> object created extends JSONDateTimeField(this)
>>>>>>> }
>>>>>>> object Account extends Account with CouchMetaRecord[Account]
>>>>>>>
>>>>>>> ...
>>>>>>>
>>>>>>> val account = Account.createRecord.created(new Date())
>>>>>>>
>>>>>>>
>>>>>>> I get a compilation error:
>>>>>>>
>>>>>>> [WARNING] Test.scala:44: error: overloaded method value apply with
>>>>>>> alternatives ((net.liftweb.common.Box[_12.MyType])test.Account) forSome
>>>>>>> { val _12: object test.Account#created } <and>
>>>>>>> ((_13.MyType)test.Account) forSome { val _13: object
>>>>>>> test.Account#created } cannot be applied to (java.util.Date)
>>>>>>> [WARNING] val account = Account.createRecord.created( new
>>>>>>> Date())
>>>>>>>
>>>>>>>
>>>>>>> I'm sure that I am just missing something obvious. Any ideas what?
>>>>>>>
>>>>>>> Thanks,
>>>>>>> Craig
>>>>>>>
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