On Jun 3, 2008, at 9:44 PM, Lachlan Deck wrote:
On 04/06/2008, at 1:19 PM, Lachlan Deck wrote:
On 04/06/2008, at 12:58 PM, Chuck Hill wrote:
On Jun 3, 2008, at 7:26 PM, Lachlan Deck wrote:
Hi there,
Say I have entities Foo and Bar (both of which have an attribute
isDeleted) and a join FooBar and I create restricting qualifiers
for Foo and Bar of (isDeleted IS NULL OR isDeleted = 0).
Foo.fooBars() still fetches all fooBars even if pointing to a Bar
that cannot be instantiated due to the restricting qualifier.
So my question is: should EOF filter such joins automatically
(i.e., should I file a bug) or is it just up to me to auto-apply
these restricting qualifiers?
I would expect that to work for fetches. In the past I have had a
relationship to a subclass in a single table inheritance
hierarchy, and I recall that only the correct instances were
fetched.
Yeah, and I just checked again and I already have code that
automatically creates a restricting qualifier for joins by
migrating the restricting qualifiers from the related entities. So
I end up with:
9837 INFO [main] (er.extensions.ERXNSLogLog4jBridge, appendln, 38) -
willLoadEntity added restricting qualifier to:FooBar of
((foo.isDeleted <> (java.lang.Boolean)'true') and (bar.isDeleted <>
(java.lang.Boolean)'true'))
But if you're right, and EOF already uses this in its qualifier then
I probably don't need to be doing that.
I was trying really hard to not ask why you were doing that. ;-) I
don't think you should need to do this if EOF is working correctly.
But maybe the problem is that of null results for these related
entities where the qualifier applies.
I can't see why this should not work, I'd file a bug.
ok.
Have you checked the SQL and verified that they restricting
qualifier is not getting generated?
Will have to check again. Thanks.
See logs below. The FooBar restricting qualifier is not being
applied properly it seems.
Any ideas Pierre?
----------------------------------------
As an aside, Chuck, this should also answer your question re VI
fetches (Subject Re: Inheritance)
On 08/05/2008, at 6:27 AM, Chuck Hill wrote:
On May 7, 2008, at 1:14 PM, Robert Walker wrote:
The only time vertical inheritance makes sense if when you always
fetch against leaf nodes of the inheritance tree and only if the
inheritance tree is very shallow. Take that to mean one level deep
of inheritance with an abstract root entity that you never fetch
against.
Anything more complex than that I would recommend single-table.
My 2 cents.
Vertical or horizontal? With vertical this will still select on
the root, won't it?
----------------------------------------
with regards,
--
Lachlan Deck
<<<
35238 DEBUG [WorkerThread15] (er.extensions.ERXNSLogLog4jBridge,
appendln, 44) -
evaluateExpression: <com.webobjects.jdbcadaptor.MySQLPlugIn
$MySQLExpression: "SELECT blah blah FROM FooBar t0, Taggable T2, Foo
T1 WHERE ((T2.isDeleted <> ? AND T2.isDeleted <> ?)
It seems quite wrong that it is doing this check twice on T2 and not
at all on T1. Is it possible that your entity loading code has a
typo? Or is this the bug you think is in EOF?
AND t0.fooId = ?) AND T1.id = T2.id AND t0.fooId = T1.id ORDER BY
whatever" withBindings: 1:true(isDeleted), 2:true(isDeleted),
3:145310(fooId)>
35242 DEBUG [WorkerThread15] (er.extensions.ERXNSLogLog4jBridge,
appendln, 44) -
1 row(s) processed
>>>
<<<
35287 DEBUG [WorkerThread15] (er.extensions.ERXNSLogLog4jBridge,
appendln, 44) -
evaluateExpression: <com.webobjects.jdbcadaptor.MySQLPlugIn
$MySQLExpression: "SELECT T1.x, T0.y, blah etc FROM Bar t0, Taggable
T1 WHERE ((T1.entityType = ? AND T1.isDeleted <> ?) AND t0.id = ?)
AND t0.id = T1.id ORDER BY whatever" withBindings:
1:"Bar"(entityType), 2:true(isDeleted), 3:4818(id)>
35292 DEBUG [WorkerThread15] (er.extensions.ERXNSLogLog4jBridge,
appendln, 44) -
0 row(s) processed
>>>
35325 ERROR [WorkerThread15] (willow.view.DynamicDirectAction,
directActionName, 248) -
Failed to obtain key baz available for object:{values = {... lots of
NSKeyValueCoding$Null values as not yet faulted...}; this =
"<willow.model.Bar 12f9924 _EOIntegralKeyGlobalID[Bar
(java.lang.Long)4818]>"; }
What part of that select is not matching? Are you getting bitten by
nulls?
Chuck
er.extensions.ERXDatabaseContextDelegate
$ObjectNotAvailableException: No willow.model.Bar found with
globalID: <Bar: [id: '4818'] >
at
er
.extensions
.ERXDatabaseContextDelegate
.databaseContextFailedToFetchObject(ERXDatabaseContextDelegate.java:
234)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun
.reflect
.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun
.reflect
.DelegatingMethodAccessorImpl
.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at
com
.webobjects.foundation.NSSelector._safeInvokeMethod(NSSelector.java:
120)
at com.webobjects.foundation._NSDelegate._perform(_NSDelegate.java:
225)
at com.webobjects.foundation._NSDelegate.perform(_NSDelegate.java:
170)
at
com
.webobjects
.eoaccess.EODatabaseContext._fireFault(EODatabaseContext.java:4384)
at
com
.webobjects
.eoaccess
.EOAccessFaultHandler
.completeInitializationOfObject(EOAccessFaultHandler.java:85)
at
com.webobjects.eocontrol.EOCustomObject.willRead(EOCustomObject.java:
1189)
at com.webobjects.eocontrol._EOMutableKnownKeyDictionary$Initializer
$
_GenericRecordBinding
.valueInObject(_EOMutableKnownKeyDictionary.java:519)
at
com
.webobjects
.eocontrol.EOCustomObject.storedValueForKey(EOCustomObject.java:1736)
at com.ish.willow.eoaccess.model._Taggable.angelId(_Taggable.java:
104)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun
.reflect
.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun
.reflect
.DelegatingMethodAccessorImpl
.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at com.webobjects.foundation.NSKeyValueCoding$ValueAccessor
$1.methodValue(NSKeyValueCoding.java:684)
at com.webobjects.foundation.NSKeyValueCoding
$_MethodBinding.valueInObject(NSKeyValueCoding.java:1160)
at
com
.webobjects.eocontrol.EOCustomObject.valueForKey(EOCustomObject.java:
1559)
<...>
--
Practical WebObjects - for developers who want to increase their
overall knowledge of WebObjects or who are trying to solve specific
problems.
http://www.global-village.net/products/practical_webobjects
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