It would be helpful, if the DiscriminatorColumn could be used as a readable property within an Entity-Instance.
Right now, I'm not able to use SingleTable Inheritance, if the DiscriminatorValue has to be shown within a Dataset.
It would be helpful, if the DiscriminatorColumn could be used as a readable property within an Entity-Instance.
Right now, I'm not able to use SingleTable Inheritance, if the DiscriminatorValue has to be shown within a Dataset.
a Possible solution could be setting something like MappedBy in Associations for the DiscriminatorColumn attribute.
For Example:
[Entity]
[DiscriminatorColumn('Type', TDiscriminatorType.dtString, 'FType')]
TFiles = class
private
FType: string;
...
end;
or it would be more easy to do in that way (but I think it is harder to implement):
[Entity]
TFiles = class
private
[DiscriminatorColumn('Type')]
FType: string;
...
end;
This could be achieved without any implementation by creating a public property in the base class with a virtual getter, and implement the getter returning a fixed value for each class in the hierarchy:
TFiles = class
protected
function GetType: string; virtual;
public
property &Type: string read GetType;
TMyDescendant = class(TFiles)
protected
function GetType: string; override;
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