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From "Jurgen Doll (JIRA)" <j...@apache.org>
Subject [jira] [Created] (CAY-2254) Move PrePersist & PreUpdate lifecycle events to occur before validation
Date Fri, 03 Mar 2017 14:10:45 GMT
Jurgen Doll created CAY-2254:
--------------------------------

             Summary: Move PrePersist & PreUpdate lifecycle events to occur before validation
                 Key: CAY-2254
                 URL: https://issues.apache.org/jira/browse/CAY-2254
             Project: Cayenne
          Issue Type: Improvement
          Components: Core Library, Documentation
    Affects Versions: 4.0.M4, 4.0.M3, 3.1.1, 3.1
            Reporter: Jurgen Doll
            Priority: Minor


With regards to the PrePersist & PreUpdate lifecycle events it appears that developers
are expecting these events to take place before validation occurs, as the original docs for
3.1 also indicate.

Developers are trying to use these as a place to set default values before the actual commit
occurs, but validation prevents this from happening. It was also noted that to make changes
to the data after validation is not good practice.

Options:
1. Move the lifecycle events to occur before validation (and update the docs for 4)

2. or Update the docs to clarify the function of PrePersist & PreUpdate, i.e. what it
is for, what it is not for, and provide suggestions as to where / how to accomplish the not
for things that developers are currently trying to do.





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