error on line : config.AddAssembly("Hibernatetest");
Error Message : Could not compile the mapping document: Hibernatetest.Company.hbm.xml
Configuration config = new Configuration();
ISessionFactory factory;
config.SetProperty(NHibernate.Cfg.Environment.ConnectionProvider, "NHibernate.Connection.DriverConnectionProvider");
config.SetProperty(NHibernate.Cfg.Environment.Dialect, "NHibernate.Dialect.MsSql2008Dialect");
config.SetProperty(NHibernate.Cfg.Environment.ConnectionDriver , "NHibernate.Driver.SqlClientDriver");
config.SetProperty(NHibernate.Cfg.Environment.ConnectionString, "Data Source=(local);Initial Catalog=Chitty;Integrated Security=True");
config.SetProperty(NHibernate.Cfg.Environment.ProxyFactoryFactoryClass, "NHibernate.ByteCode.Castle.Core.ProxyFactoryFactory ,NHibernate.ByteCode.Castle.Core");
config.AddAssembly("Hibernatetest");
this is the company xml file
<hibernate-mapping xmlns="urn:nhibernate-mapping-3.0" namespace="Hibernatetest"
assembly="Hibernatetest">
<class name="Company" table="Company">
<id name="company_Id">
<generator class="identity" />
</id>
<property name="company_name" type="string" />
<property name="company_email" type="string"/>
<property name="company_size" type="string"/>
</class>
</hibernate-mapping>
please help
Hi
I don't know why you put your namespace in the hbm file:
Hibernatetest.Company.hbm.xml
and also put the namespace in the class name:
This is how should look:
Company.hbm.xml
and
<hibernate-mapping xmlns="urn:nhibernate-mapping-3.0" namespace="Hibernatetest"
assembly="Hibernatetest">
<class name="Company" table="Company">
<id name="company_Id">
<generator class="identity" />
</id>
<property name="company_name" type="string" />
<property name="company_email" type="string"/>
<property name="company_size" type="string"/>
</class>
</hibernate-mapping>
Also you can get rid off the type but it's a good practice to put the column attribute in a property.
The class name is wrong, write the class name with the full namespace ( if you don't want to specify the namespace at the mapping level. The offending part is for sure the comma after the Company. And btw, if it does not solve, please add the class too in your question: it looks strange you have defined a c# class with properties named "company_name".
Related
I have two classes: Order and User
Order has User class inside of it:
[DataMember]
public virtual User User { get; set; }
I have NHibernate mapping for both of them:
For User:
<?xml version="1.0" encoding="utf-8" ?>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2"
assembly="Purchasing" namespace="Purchasing.Other">
<class name="User" table="tUser">
<id name="RID">
<column name="RID" sql-type="bigint"/>
<generator class="native"/>
</id>
<property name="Created"/>
<property name="Modified"/>
<property name="UserName"/>
<property name="Email"/>
<property name="ExternalUserId"/>
</class>
</hibernate-mapping>
And I tried to add User class to Order mapping, BUT looks like something is wrong:
<?xml version="1.0" encoding="utf-8" ?>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2"
assembly="Purchasing" namespace="Purchasing.Other">
<class name="Order" table="tOrder">
<id name="Id">
<column name="OrderId" sql-type="bigint"/>
<generator class="native" />
</id>
<property name="DataOwnerId" />
<property name="UserId" />
<property name="OrderNo"/>
<property name="FirstTaken"/>
<property name="DateRequired" />
<property name="ExternalOrderId" />
<many-to-one name="User" class="User" property-ref="ExternalUserId">
<column name="UserId" not-null="false"/>
</many-to-one>
</class>
</hibernate-mapping>
I have a situation, when, writing Order in tOrder database, I also need to write its User to tUser database.
But looks like it didn't work. (Order mapping without User map works fine).
How in this situation mapping should look correctly, and what am I missing?
P.S Sorry for my bad English.
If we want to persist User with its Order, we can use cascading setting:
5.1.10. many-to-one
An ordinary association to another persistent class is declared using a many-to-one element. The relational model is a many-to-one association. (It's really just an object reference.)
<many-to-one
name="PropertyName" (1)
...
cascade="all|none|save-update|delete" (4)
...
/>
(4) cascade (optional): Specifies which operations should be cascaded from the parent object to the associated object.
So the mapping could be like this:
<many-to-one name="User" class="User"
property-ref="ExternalUserId"
cascade="save-update"
column="UserId" not-null="false"
/>
Now, we only have to be sure, that we try to find a user (it could be existing)
var user = session.Get<User>(userId);
if(user == null)
{
user = new User { ... };
}
And then we can assing that user to the Order
var order = new Order { ... };
order.User = user;
and calling session to persist Order - user will be as well:
session.SaveOrUpdae(order);
NOTE: if you can reference user by its native ID ... it would be better. Mapping then would look like:
<many-to-one name="User" class="User"
cascade="save-update"
column="RID" not-null="false"
/>
Mapping with property-ref should be used exceptionally
I'm having an issue where I'm sending a message to nServiceBus with a message data field of variable length. nServiceBus is using nHibernate to create a table called
[NServiceBus].[PendingMentorEmailSagaData]
from a class called PendingMentorEmailSagaData . The message field is however getting set to nvarchar(255), I am looking for a way to have it set to nvarchar(MAX).
I've tried using an embedded hbm file, but am getting a "persistent class PendingMentorEmailSagaData not found" error.
This probably means I can't figure out what class to set the file too.
The hbm file:
<?xml version="1.0" encoding="utf-8" ?>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2">
<class name="PendingMentorEmailSagaData">
<id name="Id" />
<property name="OriginalMessageId" />
<property name="Originator" />
<property name="PendingMentorEmailCommandId" />
<property name="JobBoardCode" />
</class>
</hibernate-mapping>
PendingMentorEmailSagaData is the name of the saga's data class.
Create a PendingMentorEmailSagaData.hbm.xml file in the same project that the saga exists on, eg:
<?xml version="1.0" encoding="utf-8"?>
<hibernate-mapping xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="urn:nhibernate-mapping-2.2">
<class name="MY_NAMESPACE.PendingMentorEmailSagaData, MY_ASSEMBLY_NAME" table="PendingMentorEmailSagaData" dynamic-update="true" optimistic-lock="all">
<id name="Id" type="Guid">
<generator class="assigned" />
</id>
<property name="Originator" />
<property name="OriginalMessageId" />
<property name="LargeText" type="StringClob" />
</class>
</hibernate-mapping>
2. Mark that file as an Embedded Resource
Wondering if anyone could point me in the right direction..
I currently have the following 3 tables in my sqlserver database
Parameter
ParameterId
ParameterName
ParameterValue
ParameterValueId
ParameterValue
ParameterParameterValue
ParameterId
ParameterValueId
I'm trying to get it where the Parameter domain object will also fetch all the ParameterValue objects as well (I'm guessing Parameter has a one-to-many relationship with ParameterValue, since a parameter can have more than one value) but I'm getting no where - the msot I've achieved is fetching the first value, rather than all :(
If anyone is willing to help or anything I can post some code and/or the mappings I'm using - as always, any help is much appreciated :)
Mappings for Parameter
<?xml version="1.0" encoding="utf-8" ?>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2"
namespace="StockMarketAdvisorDatabaseAccess.Domain"
assembly="StockMarketAdvisorDatabaseAccess">
<class name="Parameter" table="Parameter">
<id name="ParameterId">
<column name="ParameterId" sql-type="int" not-null="true" />
<generator class="identity" />
</id>
<property name="ParameterName" />
<bag name="ParameterValues" table="ParameterParameterValue" cascade="none">
<key column="ParameterValueId" />
<one-to-many class="ParameterValue" />
</bag>
</class>
</hibernate-mapping>
Mappings for ParameterValue
<?xml version="1.0" encoding="utf-8" ?>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2"
namespace="StockMarketAdvisorDatabaseAccess.Domain"
assembly="StockMarketAdvisorDatabaseAccess">
<class name="ParameterValue" table="ParameterValue">
<id name="ParameterValueId">
<column name="ParameterValueId" sql-type="int" not-null="true" />
<generator class="identity" />
</id>
<property name="Value" column="ParameterValue"/>
</class>
</hibernate-mapping>
Thanks again, just started using nHibernate so still trying to figure most it out! :)
Your issue is you are describing one thing (1-many) but your table structure is another (many-many)
If you need many values per parameter then you should simplify your table structure to:
Parameter
-------------
* ParameterId
ParameterName
ParameterValue
--------------------
* ParameterValueId
ParameterId
ParameterValue
Then your mapping can use a 1-many mapping:
<class name="Parameter" table="Parameter">
<id name="ParameterId">
<column name="ParameterId" sql-type="int" not-null="true" />
<generator class="identity" />
</id>
<property name="ParameterName" />
<bag name="ParameterValues" table="ParameterValue" cascade="none">
<key column="ParameterId" />
<one-to-many class="ParameterValue" />
</bag>
</class>
I am trying to map a SQL Server database with nHibernate that is full of tables with varchar primary keys that are generated by external software and I need update/read (no insert) access.
I cannot find a way to get past the following error:
XXXX.Tests.GMCRepository_Fixture.Can_get_existing_GMC_by_parameter'
failed: NHibernate.MappingException :
XXXX.Domain.Mappings.GMC2.hbm.xml(4,6): XML validation error: The element 'class' in namespace 'urn:nhibernate-mapping-2.2' has invalid child element 'property' in namespace 'urn:nhibernate-mapping-2.2'. List of possible elements expected: 'meta, subselect, cache, synchronize, comment, tuplizer, id, composite-id' in namespace 'urn:nhibernate- mapping-2.2'.
Research has suggested this error is relating to there not being a valid primary key (id) defined.
Mapping XML looks like:
<?xml version="1.0" encoding="utf-8"?>
<hibernate-mapping assembly="XXXX.Domain" namespace="XXXX.Domain" xmlns="urn:nhibernate-mapping-2.2" schema="GM.dbo">
<class name="GMC2" table="C2" lazy="true" >
<property name="PARAMETER">
<column name="PARAMETER" sql-type="varchar" not-null="true" />
</property>
...
<id name="Recid">
<column name="recid" sql-type="varchar" not-null="true" />
</id>
</class>
</hibernate-mapping>
Thanks for your help!
I believe that the convention is to have the ID mapping as the first thing under the class declaration.
Also as part of the Id mapping you need to specify the Generator of the ID. In your case I think you will need the assigned generator added to your ID mapping. Your class mapping will look something like this.
<?xml version="1.0" encoding="utf-8"?>
<hibernate-mapping assembly="XXXXCRMAPI.Domain" namespace="XXXXCRMAPI.Domain" xmlns="urn:nhibernate-mapping-2.2" schema="GoldMine.dbo">
<class name="GMContact2" table="CONTACT2" lazy="true" >
<id name="Recid">
<generator type="assigned" />
<column name="recid" sql-type="varchar" not-null="true" />
</id>
<property name="Accountno">
<column name="ACCOUNTNO" sql-type="varchar" not-null="true" />
</property>
...
</class>
</hibernate-mapping>
just started out with NHIbernate and have one question, probably a bit of a stupi one! ;-)
I have 2 tables, Email and Attachment, an email can have zero or more attachments. so I created a hbm file like this:
<set name="Attachments" table="Attachments">
<key column="EmailId" foreign-key="fk_Attachments_Emails"/>
<composite-element class="Foo.Emails.Attachment, Foo.Emails">
<!-- PROBLEM HERE!!! -->
<property name="Id" column="Id" type="long" />
<!-- END PROBLEM -->
<property name="Name" column="Name" type="String" length="50"/>
<property name="Mime" column="MimeType" type="String" length="50"/>
<property name="Size" column="Size" type="long" />
<property name="FilePath" column="FilePath" type="String" length="256"/>
<property name="Parsed" column="Parsed" type="Boolean" />
</composite-element>
</set>
As I want to be able to search for the attachments by PK (the Id column in the set) I included it, but now everytime I try to save an email with attachments I get an error from the db as Nhibernate tries to insert a value into the PK, which my db naturally wont allow.
So, my question is, can I extract the pk for the Attqachment table but stop Nhiberntate from writing it when inserting a an email/attachment? Should I swap to another container like ?? if so wold you be abler to provide an example as I struggling to find a one that I understand!
THanks for your help!
Perhaps a more practical example? Where you have an object structure like this:
Email
--EmailId
--EmailProperty1
--AttachmentCollection
Attachment
--AttachmentId
--ParentEmail
--AttachmentProperty1
mapped to a table structure like this (not how i'd name it, but it's for example):
email
--emailId int PK, identity
--emailProp1 varchar(50)
emailattachment
--attachmentId int PK, identity
--emailId int, FK to email table
--attachmentProp1 varchar(50)
<hibernate-mapping>
<class name="Email" table="email">
<id name="EmailId">
<!-- this tells NHibernate to use DB to generate id -->
<generator class="native"/>
</id>
<property name="EmailProperty1" column="emailProp1"/>
<bag name="AttachmentCollection" lazy="true" inverse="true">
<key column="emailId"/>
<one-to-many class="Foo.Emails.Attachment, Foo.Emails"/>
</bag>
</class>
<class name="Attachment" table="emailattachment">
<id name="AttachmentId">
<generator class="native"/>
</id>
<property="AttachmentProperty1" column="attachmentProp1"/>
<many-to-one name="ParentEmail" class="Foo.Emails.Email, Foo.Emails" lazy="proxy" column="emailId">
</class>
</hibernate-mapping>
In this map, you'd get the bi-directional relationship, and that generator tag is telling nhibernate that objects with a null Id property (you can also specify another "unsaved-value"), then you're inserting the object, else updating. Should fix your current problem.
Couple other things: examine closely what kind of containers you need to use when mapping (bag vs. set vs. list). There's an excellent writeup in hibernatingrhino's NHibernateFAQ.
Also, since you're new to NHibernate, I very, very greatly recommend the summer of nhibernate screencasts. The best tool I've found so far for learning.
I think you want an bi-directional relationship. This way you can navigate the association both ways. This includes generated keys... Here is an example:
<class name="Order" table="ORDERHEADER" lazy="false" >
<id name="OrderId" column="ORDERID" type="int">
<generator class="sequence">
<param name="sequence">"ORDERID_SEQ"</param>
</generator>
</id>
<property name="OrderType" column="ORDERTYPE" type="Int16"/>
<bag name="OrderDetail" table="ORDERDETAIL" lazy="false" inverse="true">
<key column="OrderId"/>
<one-to-many class="OrderDetail" />
</bag>
<class name="OrderDetail" table="ORDERDETAIL" lazy="false">
<id name="OrderDetailId" column="ORDERDETAILID" type="int">
<generator class="sequence">
<param name="sequence">"ORDERDTLID_SEQ"</param>
</generator>
</id>
<property name="OrderId" column="ORDERID" type="Int32"/>
<property name="ItemNumber" column="ITEMNUMBER" type="Int32"/>
<property name="OrderQuantity" column="ORDERQUANTITY" type="Int32"/>
<many-to-one name="Order" class="Order" column="OrderId" />