Property "Unique" for ecore attribute doesn't work [message #621445] |
Fri, 09 October 2009 04:51  |
Eclipse User |
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Hi.
I want to define an ecore attribute (metamodel) which value can't occur more than once in the model.
For making that, I use the ecore editor (properties view) and set the property "Unique" to value "true".
However, when I execute the program, the editor don't check this issue, and I can add several items which contains the same value for that attribute.
The editor indicates for Unique property "Whether the same value may occur more than once". I have tried to set the value to "false", but the I get the same result.
Is this a bug or I have to use other property to get a "primary key"?
Thanks in advance.
Carlos.
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Re: Property "Unique" for ecore attribute doesn't work [message #621463 is a reply to message #621445] |
Tue, 13 October 2009 07:45   |
Eclipse User |
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Ed,
I have installed Helios distribution, and after that, I have installed EMF: "eclipse-SDK-3.6M2-win32".
When I define an entity attribute in my metamodel, I hope that in runtime, I should not be able to create two or more entities with the same value for that attribute (it was defined like unique).
However, I can do that.
I think that when I open a model with the editor in runtime, editor might should show the error of duplicate attribute in the "problems" tab, like occurs with other type of errors.
Is this OK?
In other case, what can be happening?
Thanks.
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Re: Property "Unique" for ecore attribute doesn't work [message #621464 is a reply to message #621463] |
Tue, 13 October 2009 08:47   |
Eclipse User |
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Carlos,
I believe you're misinterpreting what unique means. It means that, for
a multi-valued feature, any given value can appear at most once. It
doesn't mean that two different objects can't have the same value for
that feature; that's more like having isID be true.
Carlos wrote:
> Ed,
>
> I have installed Helios distribution, and after that, I have installed
> EMF: "eclipse-SDK-3.6M2-win32".
>
> When I define an entity attribute in my metamodel, I hope that in
> runtime, I should not be able to create two or more entities with the
> same value for that attribute (it was defined like unique).
> However, I can do that.
>
> I think that when I open a model with the editor in runtime, editor
> might should show the error of duplicate attribute in the "problems"
> tab, like occurs with other type of errors.
> Is this OK? In other case, what can be happening?
>
> Thanks.
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Re: Property "Unique" for ecore attribute doesn't work [message #1746769 is a reply to message #1746762] |
Fri, 04 November 2016 07:28  |
Eclipse User |
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You're posting a very old thread. You talk about reference list from A to B and then talk about an attribute list and about setting unique. In general multi-valued references are always unique even if you set unique to be false. You claim you can create a model instance that has a non-unique reference list. But I don't know how you did that, and I can't verify anything like that without a test case. Your post contains no question and the image tells me nothing about your problem.
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