[nhibernate-issues] [JIRA] Commented: (NH-772) "System.NullReferenceException": When load entity class form table's column contained NULL value.

[NHibernate J. <mik...@us...>]

     [ http://jira.nhibernate.org/browse/NH-772?page=comments#action_14222 ]
     
Fabio Maulo commented on NH-772:
--------------------------------

Yes you recive an Error and is normal!
This is not an issue.
The problem is the code of your class.

Your mapping don't specify the access method; the default is property.
This is what you are doing for each property.
set{ this._resetPasswordCode = value.Trim(); }

If in the DB you have a null, when NHb intent to assign property by property_set the variable "value" is null so value.Trim() throw an NullReferenceException.
To solve the problem look documentation for <access> tag for the property or use <default-access> of the mapping file to configure NHb to access to the field instead property.



> "System.NullReferenceException": When load entity class form table's column contained NULL value.
> -------------------------------------------------------------------------------------------------
>
>          Key: NH-772
>          URL: http://jira.nhibernate.org/browse/NH-772
>      Project: NHibernate
>         Type: Bug
>   Components: Core
>     Versions: 1.2.0.Beta1
>     Reporter: TREEBHOPH
>     Priority: Minor
>  Attachments: NH-BUG.zip
>
> "System.NullReferenceException: Object reference not set to an instance of an object"
> I get this ERROR when i try to load Entity Class from a table's column contained NULL value, the column's type is MySql Varchar;  however if the colums has some value , the entity class can be loaded without ERROR!
> The class that i load is a single class that no relationship to another class.
> <?xml version="1.0" encoding="utf-8" ?> 
>   <hibernate-mapping xmlns="urn:nhibernate-mapping-2.0">
>   <class name="DomainModelObject.GlobalUserAccount, DomainModelObject" table="glb_user_account" lazy="false">
>   <id name="UserID" column="user_id" type="Int64">
>   <generator class="identity" /> 
>   </id>
>   <property name="LoginName" column="user_login_name" type="String" length="50" /> 
>   <property name="Password" column="user_passwd" type="String" length="200" /> 
>   <property name="Email" column="user_email" type="String" length="50" /> 
>   <property name="RegistTime" column="user_create_time" type="DateTime" /> 
>   </class>
>   </hibernate-mapping>

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