I'm trying to save my order object in the database that has a relationship many-to-one with the table pastaIndividual.
But, I'm getting this exception:
Error: NHibernate.Exceptions.GenericADOException: could not insert:
[FrancosPoS.DBMapping.order][SQL: INSERT INTO order (price, cash,
credit, obs) VALUES (?, ?, ?, ?);SELECT LAST_INSERT_ID()] --->
MySql.Data.MySqlClient.MySqlException: You have an error in your SQL
syntax; check the manual that corresponds to your MySQL server version
for the right syntax to use near 'order (price, cash, credit, obs)
VALUES ('123', 1, 0, 'Nhibernate');SELECT LAST_' at line 1
Here is my order mapping table:
<?xml version="1.0" encoding="utf-8"?>
<hibernate-mapping assembly="FrancosPoS" namespace="FrancosPoS.DBMapping" xmlns="urn:nhibernate-mapping-2.2">
<class name="order" table="order" lazy="true" >
<id name="idOrder">
<generator class="identity" />
</id>
<set name="pastaIndividual" table="pasta_individual" cascade="save-update">
<key column="idPastaI"/>
<one-to-many class="pastaIndividual"/>
</set>
<!--<many-to-one insert="false" update="false" lazy="false" name="pastaIndividual" class="FrancosPoS.DBMapping.pastaIndividual">
<column name="idPastaI" sql-type="int(11)" not-null="false" />
</many-to-one>-->
<many-to-one insert="false" update="false" lazy="false" name="pastaCombo" class="FrancosPoS.DBMapping.pastaCombo">
<column name="idPastaC" sql-type="int(11)" not-null="false" />
</many-to-one>
<many-to-one insert="false" update="false" lazy="false" name="pastaFeast" class="FrancosPoS.DBMapping.pastaFeast">
<column name="idPastaF" sql-type="int(11)" not-null="false" />
</many-to-one>
<many-to-one insert="false" update="false" lazy="false" name="salad" class="FrancosPoS.DBMapping.salad">
<column name="idSalad" sql-type="int(11)" not-null="false" />
</many-to-one>
<many-to-one insert="false" update="false" lazy="false" name="drink" class="FrancosPoS.DBMapping.drink">
<column name="idDrink" sql-type="int(11)" not-null="false" />
</many-to-one>
<property name="price">
<column name="price" sql-type="decimal(8,4)" not-null="true" />
</property>
<property name="cash">
<column name="cash" sql-type="tinyint(1)" not-null="false" />
</property>
<property name="credit">
<column name="credit" sql-type="tinyint(1)" not-null="false" />
</property>
<property name="obs">
<column name="obs" sql-type="varchar(150)" not-null="false" />
</property>
</class>
</hibernate-mapping>
Here is my pastaIndividual mapping:
<?xml version="1.0" encoding="utf-8"?>
<hibernate-mapping assembly="FrancosPoS" namespace="FrancosPoS.DBMapping" xmlns="urn:nhibernate-mapping-2.2">
<class name="pastaIndividual" table="pasta_individual" lazy="true" >
<id name="idPastaI">
<generator class="identity" />
</id>
<property name="type">
<column name="type" sql-type="varchar(25)" not-null="true" />
</property>
<property name="price">
<column name="price" sql-type="decimal(8,4)" not-null="true" />
</property>
</class>
</hibernate-mapping>
I've tried on order mapping to use the <set> or just <many-to-one>, but the same error happen.
Maybe am I missing some inverse property?
Thanks.
Order is a reserved word. just add some back ticks to your class definition and NHibernate will escape the table name for you automatically.
<class name="order" table="`order`" lazy="true" >
Related
I've the "AnagraficaBase" hbm file:
<?xml version="1.0" encoding="utf-8"?>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2">
<class entity-name="AnagraficaBase" table="anagrafica">
<id name="ID" type="int" >
<column name="ID" not-null="true" />
<generator class="identity" />
</id>
<property name="Email" type="string" >
<column name="Email" sql-type="varchar(255)" not-null="true" />
</property>
<one-to-one cascade="all" class="NetCms.Users.User" property-ref="AnagraficaMapped" name="User" />
<joined-subclass entity-name="Anagraficaprova" table="anagrafica_prova" >
<key>
<column name="id_anagrafica_prova" />
</key>
<property name="data di nascita" type="DateTime">
<column name="data_di_nascita" sql-type="DateTime" not-null="true" />
</property>
<property name="nome" type="string">
<column name="nome" sql-type="varchar(25)" not-null="true" />
</property>
<property name="dropdown test" type="string">
<column name="dropdown_test" sql-type="varchar(255)" not-null="true" />
</property>
<bag name="profilo" table="anagrafica_prova_custom_field_checkboxlist_values" cascade="all" fetch="select">
<key>
<column name="IDanagrafica_prova" not-null="true" />
</key>
<many-to-many entity-name="CustomCheckboxListValue">
<column name="IDcustom_field_checkboxlist_value" not-null="true" />
</many-to-many>
</bag>
</joined-subclass>
</class>
</hibernate-mapping>
I want to create an "Anagraficaprova" object with dynamic session (EntityMode.Map).
As you can see, I've a unidirectional many to many relation between "Anagraficaprova" and "CustomCheckboxListValue".
So, when I do:
ISession mapSession = sess.GetSession(EntityMode.Map);
List<IDictionary> profiles = new List<IDictionary>();
Hashtable profilo1 = (Hashtable) mapSession.get("CustomCheckboxListValue",1);
profiles.add(profilo1);
Hashtable anagraficaProva = new Hashtable();
anagraficaProva.add("Email","test");
anagraficaProva.add("data di nascita", "08/10/1982");
anagraficaProva.add("nome","pippo");
anagraficaProva.add("dropdown test","1");
anagraficaProva.add("profilo", profiles);
mapSession.SaveOrUpdate("Anagraficaprova", anagraficaProva);
The anagraficaProva object is correctly saved, but the record in "anagrafica_prova_custom_field_checkboxlist_values" table (the couple: IDanagrafica_prova,IDcustom_field_checkboxlist_value) is not inserted.
Where is the problem?
Thank you...
In case someone else comes here.
NH inserts AnagraficaBase because it uses identity to get the id but batches the Inserts into table anagrafica_prova_custom_field_checkboxlist_values to insert them in one go later. But before they are sent to db the session is thrown away and therefor the batched Inserts.
mapSession.Flush(); after SaveOrUpdate tells NH to send all pending statements.
I have just started working with NHibernate. Have found it pretty good till now but have hit an issue that I am unable to solve. Any help will be greatly appreciated.
I am trying to use the "version" feature to help implement optmistic locking. Below is my mapping file and a portion of code from the related class. My problem is that no matter how many times I modify any field, the "Version" column on the database does not get updated.
My mapping file:
<?xml version="1.0" encoding="utf-8" ?>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2"
namespace="MyTest"
assembly ="MyTest">
<class name="Project" table="dbo.M_Project">
<id name="ProjectId" type="Int32" unsaved-value="null">
<column name="ProjectId" sql-type="int" not-null="true" unique="true" />
<generator class="native" />
</id>
<version name="Version" column="Version"/>
<property name="ProjectName" type="String">
<column name="ProjectName" length="100" sql-type="nvarchar" not-null="true"/>
</property>
<property name="Updated" type="bool">
<column name="Updated" sql-type="bit" not-null="true"/>
</property>
<property name="NoOfItemsWithExceptions" type="int">
<column name="NoOfItemsWithExc" sql-type="int" not-null="true"/>
</property>
<property name="MenuState" type="int">
<column name="MenuState" sql-type="int" not-null="true"/>
</property>
<property name="Initialized" type="bool">
<column name="Initialized" sql-type="bit" not-null="true"/>
</property>
<property name="InventoryRun" type="bool">
<column name="InventoryRun" sql-type="bit" not-null="true"/>
</property>
<property name="ProductionForecastRun" type="bool">
<column name="ProductionForecastRun" sql-type="bit" not-null="true"/>
</property>
<property name="MonthlyUpdate" type="bool">
<column name="MonthlyUpdate" sql-type="bit" not-null="true"/>
</property>
<bag name="SKUList" table="dbo.P_SKU" inverse="true" lazy="true" cascade="save-update">
<key column="ProjectId" />
<one-to-many
class="SKU"/>
</bag>
</class>
</hibernate-mapping>
The associated version property:
private int _version;
public virtual int Version
{
get { return _version; }
set { _version = value; }
}
Thanks!
It might be necessay to explicity set the optimistic-lock attribute (in theory it's not). For instance
<class name="Project" table="dbo.M_Project" optimistic-lock="dirty">
Here you have more info about it
What's wrong with this mapping?
On saving an instance of Class3, two rows in Table_2 will be inserted!
first row has Column4 set to null and correct value of Column3,
and second row has Column3 set to null and correct value of Column4!
<class name="Class1" table="Table_1">
<id name="Column1">
<generator class="native" />
</id>
<discriminator column="ColumnDisc" />
<property name="Column2" type="int" />
<subclass name="Class2">
<join table="Table_2">
<key column="Column1" />
<property name="Column3" type="int" />
</join>
<subclass name="Class3" >
<join table="Table_2">
<key column="Column1" />
<property name="Column4" type="int" />
</join>
</subclass>
</subclass>
</class>
Where do you set the discriminator value for each of the derived types?
If I believe the link to which you pointed in your comment, the class mapping looks like this:
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<class name="com.javalobby.tnt.hib.User" table="USER" lazy="false">
<id name="id" type="long" column="ID">
<generator class="identity" />
</id>
<discriminator column="type" type="string"/>
<property name="firstName" column="first_name"/>
<property name="lastName" column="last_name"/>
<subclass name="com.javalobby.tnt.hib.Employee" discriminator-value="employee">
<join table="employee">
<key column="id"/>
<property name="jobTitle" column="job_title"/>
<many-to-one name="supervisor" column="supervisor_id" not-null="true" />
</join>
<subclass name="com.javalobby.tnt.hib.Employer" discriminator-value="employer">
<set name="subordinates">
<key column="supervisor_id" not-null="true"/>
<one-to-many class="com.javalobby.tnt.hib.Employee"/>
</set>
<join table="employer">
<key column="id"/>
<property name="companyCarBrand" column="company_car_brand"/>
</join>
</subclass>
</subclass>
</class>
If I compare your mapping with this one, you lack discriminator-value attribute within your <subclass> tag.
<class name="Class1" table="Table_1">
<id name="Column1">
<generator class="native" />
</id>
<discriminator column="ColumnDisc" />
<property name="Column2" type="int" />
<subclass name="Class2"> <!-- The discriminator-value="" is missing here... -->
<join table="Table_2">
<key column="Column1" />
<property name="Column3" type="int" />
</join>
<subclass name="Class3" > <!-- The discriminator-value="" is missing here... -->
<join table="Table_2">
<key column="Column1" />
<property name="Column4" type="int" />
</join>
</subclass>
</subclass>
</class>
Make sure you set the right discriminator values for each of the subclasses you intend to map. I suggest trying this and figure out whether it works better, or if this raised another problem. =)
Hope this helps! =)
I have a mapping file
<set name="Friends" table="Friends">
<key column="UserId"/>
<many-to-many class="User" column="FriendId"/>
</set>
I would like to specify extra columns for the friend table this creates.
For example Approve (the user must approve the friend request)
Is there a easy way?
And update
<?xml version="1.0" encoding="utf-8"?>
<hibernate-mapping namespace="MyVerse.Domain" assembly="MyVerse.Domain" xmlns="urn:nhibernate-mapping-2.2">
<class name="User" table="[User]" lazy="true">
<id name="Id" type="Guid">
<generator class="guid" />
</id>
<property name="DateCreated" type="DateTime" not-null="true" />
<property name="Deleted" type="Boolean" not-null="true" />
<property name="Firstname" type="String" length="100" not-null="true" />
<property name="Lastname" type="String" length="100" not-null="true" />
<bag name="Friends" table="[Friend]">
<key column="UserId"/>
<many-to-many class="Friend" column="FriendId"/>
</bag>
</class>
<class name="Friend" table="[Friend]" lazy="true">
<id name="Id" type="Guid">
<generator class="guid" />
</id>
<property name="DateCreated" type="DateTime" not-null="true" />
<property name="Approved" type="Boolean" not-null="true" />
</class>
</hibernate-mapping>
Will cause a link to the friend table from the friend table
If a set has "extra properties", you must convert it into a proper entity.
So, a User doesn't have an ISet<User>; it has an ISet<Friend>.
When I save a new Report, NHibernate inserts the Report, ignores the Publication and tries to insert the UserPublication. However SQL then complains about violation of FK constraint.
Its like NHibernate doesn't think the Publication is new even though the row doesn't exist in the db.
Think of the entity relationship as:
A Report can have many Publications (Publications belong to a Report)
A Publication can have many UserPublications (UserPublications belong to a Publication)
Any ideas what I've done wrong?
Thanks in advance.
Here's the mappings:
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2" auto-import="true">
<class name="Model.Report, Model" table="Report" lazy="true">
<id name="Id" access="property" column="ReportID">
<generator class="assigned"></generator>
</id>
<property name="DeleteUnread" access="property" />
<property name="Description" access="property" />
<property name="Name" access="property" />
<bag name="Publications" access="property" lazy="true" cascade="all-delete-orphan">
<key column="ReportID"/>
<one-to-many class="Model.Publication, Model"/>
</bag>
</class>
</hibernate-mapping>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2" auto-import="true">
<class name="Model.Publication, Model" table="Publication" lazy="true">
<id name="Id" access="property" column="PublicationID">
<generator class="assigned"></generator>
</id>
<property name="CreatedOn" access="property" />
<property name="FileExtension" access="property" />
<property name="IsDownloaded" access="property" />
<property name="ToBeDownloaded" access="property" />
<property name="Name" access="property"/>
<bag name="UserPublications" access="property" lazy="true" cascade="all-delete-orphan">
<key column="PublicationID"></key>
<one-to-many class="Model.UserPublication, Model" />
</bag>
<many-to-one name="Report" class="Model.Report, Model" lazy="false" column="ReportID" not-null="true" cascade="none">
</many-to-one>
</class>
</hibernate-mapping>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2" auto-import="true">
<class name="Model.UserPublication, Model" table="UserPublication" lazy="true">
<id name="Id" access="property" column="UserPublicationID">
<generator class="native"></generator>
</id>
<property name="IsFlaggedForDeletion" access="property" column="IsFlaggedForDeletion" />
<property name="HasBeenRead" access="property" column="HasBeenRead" />
<property name="DateReceived" access="property" column="DateReceived" />
<property name="MustRead" access="property" column="MustRead" />
<property name="ShowToolbar" access="property" column="ShowToolbar" />
<property name="MaxAge" access="property" column="MaxAge" />
<property name="FeedId" access="property" column="FeedId" />
<property name="CanEdit" access="property" column="CanEdit" />
<many-to-one name="User" access="property" column="ClientUserID" class="Model.ClientUser, Model" not-null="true" cascade="none">
</many-to-one>
<many-to-one name="Publication" access="property" class="Model.Publication, Model" column="PublicationID" not-null="true" cascade="none">
</many-to-one>
</class>
I think the problem is that id of publications is an assigned id therefore NHibernate can't recognize when it should insert a publication.
When you flush a session it first insert all inserted objects , then it updates all updated objects and then deletes all deleted objects.
So I think that's going to happen here:
You save a Report that has publications that have userpublications.Since publication id is assigned NHibernate assumes it has to be updated and ignore it but UserPublication id is native and NHibernates knows when it should be inserted and tries to insert it thus a FK violation happens.
To solve this problem you can add a version property to publication so NHibernate can insert it based on its version value.
The UserPublications bag in the Publication class has a wrong key element. It should be:
<key column="PublicationID"/>
This works. I set the unsaved-value attribute to "any".
I don't think there will be any repurcussions.
<id name="Id" access="property" column="PublicationID" unsaved-value="any">
<generator class="assigned"></generator>
</id>