Extend base type and automatically update audit information on Entity
- by Nix
I have an entity model that has audit information on every table (50+ tables)
CreateDate
CreateUser
UpdateDate
UpdateUser
Currently we are programatically updating audit information.
Ex:
if(changed){
entity.UpdatedOn = DateTime.Now;
entity.UpdatedBy = Environment.UserName;
context.SaveChanges();
}
But I am looking for a more automated solution. During save changes, if an entity is created/updated I would like to automatically update these fields before sending them to the database for storage.
Any suggestion on how i could do this? I would prefer to not do any reflection, so using a text template is not out of the question.
A solution has been proposed to override SaveChanges and do it there, but in order to achieve this i would either have to use reflection (in which I don't want to do ) or derive a base class. Assuming i go down this route how would I achieve this?
For example
EXAMPLE_DB_TABLE
CODE
NAME
--Audit Tables
CREATE_DATE
CREATE_USER
UPDATE_DATE
UPDATE_USER
And if i create a base class
public abstract class IUpdatable{
public virtual DateTime CreateDate {set;}
public virtual string CreateUser { set;}
public virtual DateTime UpdateDate { set;}
public virtual string UpdateUser { set;}
}
The end goal is to be able to do something like...
public overrride void SaveChanges(){
//Go through state manager and update audit infromation
//FOREACH changed entity in state manager
if(entity is IUpdatable){
//If state is created... update create audit.
//if state is updated... update update audit
}
}
But I am not sure how I go about generating the code that would extend the interface.
