Re: Max Length

From: Andrus Adamchik (andru..bjectstyle.org)
Date: Mon Aug 23 2010 - 12:24:55 UTC

  • Next message: Michael Gentry: "Re: Max Length"

    Actually in 3.1 we are moving away from metadata utility methods inside Perissitent/CayenneDataObject. We've already deprecated 'getObjEntity'. A current place for this type of utilities is in org.apache.cayenne.Cayenne (aka DataObjectUtils). There was a discussion about it some time ago. Don't remember the subject off hand.

    Also since we should try to keep the API clean, how about condensing that to:

       Cayenne.getDbAttribute(Persistent object, String propertyName) ?

    (similar to the existing Cayenne.getProperty(Persistent object, String properyName)).

    Andrus

    On Aug 20, 2010, at 3:20 PM, Michael Gentry wrote:
    > One thing I recently added to our common/shared base class is:
    >
    > /**
    > * Lookup the maximum database length defined in the Cayenne model for
    > * the given attribute.
    > *
    > *..aram attribute The attribute to lookup.
    > *..eturn The maximum length for the attribute.
    > */
    > public int getMaxLength(String attribute)
    > {
    > return getObjEntity().getAttributeMap().get(attribute).getDbAttribute().getMaxLength();
    > }
    >
    >
    > Would it make sense to add this to CayenneDataObject in 3.1? We use
    > it to limit file upload sizes and do client-side validation in the UI.
    > I could also see isMandatory() being useful, too. Scale/precision
    > not as much, but might help some.
    >
    > Thoughts?
    >
    > Thanks,
    >
    > mrg
    >



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