On Thu, Dec 31, 2015 at 4:56 PM, Michael Powell <mwpowell...@gmail.com> wrote:
> On Thu, Dec 31, 2015 at 3:31 PM, Michael Powell <mwpowell...@gmail.com> wrote:
>> On Thu, Dec 31, 2015 at 3:30 PM, Michael Powell <mwpowell...@gmail.com>
>> wrote:
>>> On Thu, Dec 31, 2015 at 2:41 PM, Michael Powell <mwpowell...@gmail.com>
>>> wrote:
>>>> Hello,
>>>>
>>>> I have some confusion about how to best handle meta-ownership of
>>>> parent/child records. Briefly, I have a statistics table whose rows
>>>> may be owned by one of several parent tables.
>>>
>>> I got past that bit, but now on the return trip, reading the values
>>> back out of the database, I am getting messages about the parent's Id.
>>> Somehow this is ignoring the Id conventions, or I want to verify that
>>> the convention includes this as a use case, not quite certain as to
>>> which (?).
Pretty sure I have it nailed this time. Where I map the one to many,
HasMany Cohorts:
HasMany(x => x.Cohorts)
.LazyLoad()
.Inverse()
.AsBag()
.Where(string.Format(@"HostModelType = '{0}'", typeof
(T).FullName))
.KeyColumn(@"HostModelId")
.Cascade.AllDeleteOrphan();
Note the KeyColumn is set accordingly. Could get more fluent there,
with properties, suffixes, conventions, but that's generally the idea.
Which now that I look at it, makes perfect sense.
> Here are the HBM's exported after successfully configuring the session
> in and of itself.
>
> For Slot:
> <bag access="field.camelcase-underscore"
> cascade="all-delete-orphan" inverse="true" lazy="true" name="Cohorts"
> where="HostModelType = 'Football.Models.Slot'">
> <key>
> <column name="SlotId" />
> </key>
> <one-to-many
> class="Football.Models.Statistics.StatisticalCohort, Football,
> Version=1.44.0.29778, Culture=neutral, PublicKeyToken=null" />
> </bag>
>
> In another host model:
>
> <bag access="field.camelcase-underscore"
> cascade="all-delete-orphan" inverse="true" lazy="true" name="Cohorts"
> where="HostModelType = 'Football.Models.Play'">
> <key>
> <column name="PlayId" />
> </key>
> <one-to-many
> class="Football.Models.Statistics.StatisticalCohort, Football,
> Version=1.44.0.29778, Culture=neutral, PublicKeyToken=null" />
> </bag>
>
> Somehow SlotId and PlayId are being inferred, but I do not see
> extension methods, etc, that might lead me to believe I could set the
> relevant Id property.
>
> Id's for my domain models are "Id", configured in their mappings. No
> reason for them to be different here, either.
>
> And in the Cohort itself:
>
> <hibernate-mapping xmlns="urn:nhibernate-mapping-2.2">
> <class xmlns="urn:nhibernate-mapping-2.2"
> name="Football.Models.Statistics.StatisticalCohort, Football,
> Version=1.44.0.29778, Culture=neutral, PublicKeyToken=null"
> table="StatisticalCohorts">
> <id name="Id" type="System.Guid, mscorlib, Version=4.0.0.0,
> Culture=neutral, PublicKeyToken=b77a5c561934e089">
> <column name="Id" not-null="true" />
> <generator class="guid.comb" />
> </id>
> <bag access="field.camelcase-underscore"
> cascade="all-delete-orphan" inverse="true" lazy="true"
> name="Statistics">
> <key>
> <column name="StatisticalCohortId" />
> </key>
> <one-to-many class="Football.Models.Statistics.Statistic,
> Football, Version=1.44.0.29778, Culture=neutral, PublicKeyToken=null"
> />
> </bag>
> <property name="Type"
> type="NHibernate.Type.EnumStringType`1[[Football.Models.StatisticalCohortType,
> Football, Version=1.44.0.29778, Culture=neutral,
> PublicKeyToken=null]], NHibernate, Version=4.0.0.4000,
> Culture=neutral, PublicKeyToken=aa95f207798dfdb4">
> <column name="Type" not-null="true" />
> </property>
> <property name="CreatedOn" type="System.DateTime, mscorlib,
> Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
> <column name="CreatedOn" not-null="true" />
> </property>
> <any cascade="none" id-type="System.Guid, mscorlib,
> Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"
> meta-type="System.String, mscorlib, Version=4.0.0.0, Culture=neutral,
> PublicKeyToken=b77a5c561934e089" name="HostModel">
> <meta-value value="Football.Models.Team"
> class="Football.Models.Team, Football, Version=1.44.0.29778,
> Culture=neutral, PublicKeyToken=null" />
> <meta-value value="Football.Models.TeamParticipation"
> class="Football.Models.TeamParticipation, Football,
> Version=1.44.0.29778, Culture=neutral, PublicKeyToken=null" />
> <meta-value value="Football.Models.Roster"
> class="Football.Models.Roster, Football, Version=1.44.0.29778,
> Culture=neutral, PublicKeyToken=null" />
> <meta-value value="Football.Models.Game"
> class="Football.Models.Game, Football, Version=1.44.0.29778,
> Culture=neutral, PublicKeyToken=null" />
> <meta-value value="Football.Models.GameSchedule"
> class="Football.Models.GameSchedule, Football, Version=1.44.0.29778,
> Culture=neutral, PublicKeyToken=null" />
> <meta-value value="Football.Models.GameSituation"
> class="Football.Models.GameSituation, Football, Version=1.44.0.29778,
> Culture=neutral, PublicKeyToken=null" />
> <meta-value value="Football.Models.BallContainer"
> class="Football.Models.BallContainer, Football, Version=1.44.0.29778,
> Culture=neutral, PublicKeyToken=null" />
> <meta-value value="Football.Models.Play"
> class="Football.Models.Play, Football, Version=1.44.0.29778,
> Culture=neutral, PublicKeyToken=null" />
> <meta-value value="Football.Models.Slot"
> class="Football.Models.Slot, Football, Version=1.44.0.29778,
> Culture=neutral, PublicKeyToken=null" />
> <meta-value
> value="Football.Mechanics.Models.CharacteristicTrait"
> class="Football.Mechanics.Models.CharacteristicTrait, Football,
> Version=1.44.0.29778, Culture=neutral, PublicKeyToken=null" />
> <meta-value value="Football.Mechanics.Models.SkillTrait"
> class="Football.Mechanics.Models.SkillTrait, Football,
> Version=1.44.0.29778, Culture=neutral, PublicKeyToken=null" />
> <column name="HostModelType" />
> <column name="HostModelId" />
> </any>
> </class>
> </hibernate-mapping>
>
> All this leads me to wonder, is this a use case that needs to be
> picked up by Fluent and/or NHibernate? Or have I missed something in a
> convention, in a mapping, etc?
>
>>> I verified in the database, the child records are indeed saved, the
>>> hosting model type full name is correctly represented, but the Id is
>>> showing in an "unconventional" way, at least how I think I've got the
>>> conventions mapped. But I could be wrong.
>>>
>>> Exception messages:
>>>
>>> SQL: SELECT cohorts0_.SlotId as SlotId1_, cohorts0_.Id as Id1_,
>>> cohorts0_.Id as Id654_0_, cohorts0_.Type as Type654_0_,
>>> cohorts0_.CreatedOn as CreatedOn654_0_, cohorts0_.HostModelType as
>>> HostMode4_654_0_, cohorts0_.HostModelId as HostMode5_654_0_ FROM
>>> StatisticalCohorts cohorts0_ WHERE
>>> (System.Linq.Expressions.PropertyExpression = Football.Models.Slot)
>>> and cohorts0_.SlotId=?
>>>
>>> could not initialize a collection:
>>> [Football.Models.Slot.Cohorts#cac80bb6-3c7b-4784-a99c-a57f00fd21ee][SQL:
>>> SELECT cohorts0_.SlotId as SlotId1_, cohorts0_.Id as Id1_,
>>> cohorts0_.Id as Id654_0_, cohorts0_.Type as Type654_0_,
>>> cohorts0_.CreatedOn as CreatedOn654_0_, cohorts0_.HostModelType as
>>> HostMode4_654_0_, cohorts0_.HostModelId as HostMode5_654_0_ FROM
>>> StatisticalCohorts cohorts0_ WHERE
>>> (System.Linq.Expressions.PropertyExpression = Football.Models.Slot)
>>> and cohorts0_.SlotId=?]
>>>
>>> The multi-part identifier "System.Linq.Expressions.PropertyExpression"
>>> could not be bound.
>>
>> Should also clarify, the Slots table has an `Id` column, not a
>> `SlotId` column, by design. Only somewhere I need to inform the
>> conventions (?).
>>
>>>> In order to do this, I am using Fluent's AddMetaValue from the
>>>> AnyPart<T>, but I think I am confused about its usage.
>>>>
>>>> Somewhere along the way I thought this applied to typeof (TModel) with
>>>> a valueMap of typeof (TClassMap) where TClassMap is ClassMap<T>.
>>>>
>>>> Initial assignment of the domain model is correct. I assign instance
>>>> of Parent to Child class' HostModel property. Type shows typeof
>>>> (Parent), all is well.
>>>>
>>>> However, when the object saves, the meta value shows ParentMap, which
>>>> I do not think is correct, and hence part of my confusion.
>>>>
>>>> Here's an example of my extension method to handle this. I know what I
>>>> was driving for, but I don't recall why I was assuming TClassMap?
>>>> Except, perhaps as a way of enforcing that TClass should be mapped.
>>>>
>>>> public static AnyPart<T> AddMetaValue<T, TClass, TClassMap>(this
>>>> AnyPart<T> part)
>>>> where TClassMap : ClassMap<TClass>
>>>> where TClass : T
>>>> {
>>>> return part.AddMetaValue(typeof (TClass), typeof (TClassMap).Name);
>>>> }
>>>>
>>>> I think probably that should read more like:
>>>>
>>>> return part.AddMetaValue(typeof (TClass), typeof (TClass).Name);
>>>>
>>>> Thoughts? Insights?
>>>>
>>>> Thank you,
>>>>
>>>> Michael Powell
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