Check for existing mapping when writing a custom applier in ConfORM
- by Philip Fourie
I am writing my first custom column name applier for ConfORM.
How do I check if another column has already been map with same mapping name?
This is what I have so far:
public class MyColumnNameApplier : IPatternApplier<PropertyPath, IPropertyMapper>
{
public bool Match(PropertyPath subject)
{
return (subject.LocalMember != null);
}
public void Apply(PropertyPath subject, IPropertyMapper applyTo)
{
string shortColumnName = ToOracleName(subject);
// How do I check if the short columnName already exist?
applyTo.Column(cm => cm.Name(shortColumnName));
}
private string ToOracleName(PropertyPath subject)
{
...
}
}
}
I need to shorten my class property names to less than 30 characters to fit in with Oracle's 30 character limit. Because I am shortening the column names it is possible that I generate the same name for two different properties. I would like to know when a duplicate mapping occurs.
If I don't handle this scenario ConfORM/NHibernate allows two different properties to 'share' the same column name - this is obviously creates a problem for me.
