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From "Benjamin Venditti (JIRA)" <empire-db-...@incubator.apache.org>
Subject [jira] [Resolved] (EMPIREDB-114) Codegen adds redundant relations to the database model
Date Sun, 04 Sep 2011 10:30:09 GMT

     [ https://issues.apache.org/jira/browse/EMPIREDB-114?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Benjamin Venditti resolved EMPIREDB-114.
----------------------------------------

    Resolution: Fixed

- integrated and tested the patch for the testcase supplied by "Matt DeHoust"
- added fix for EMPIREDB-114 solution as follows:
the subroutine "gatherRelations" was called for each tablePattern, although it should have
been called just once!

> Codegen adds redundant relations to the database model
> ------------------------------------------------------
>
>                 Key: EMPIREDB-114
>                 URL: https://issues.apache.org/jira/browse/EMPIREDB-114
>             Project: Empire-DB
>          Issue Type: Bug
>          Components: CodeGenerator
>    Affects Versions: empire-db-2.2.0-incubating
>            Reporter: Matt DeHoust
>            Assignee: Benjamin Venditti
>         Attachments: codegen-relations-problem-scenario.patch.txt
>
>
> Under some circumstances CodeGen produces redundant relations on the DBDatabase, which
may lead to problems if you use the empire-db model to create your schema. The script will
fail when you try to create the same foreign key relationship twice.
> Steps to reproduce:
> 1. Define a schema with at least two different tables with foreign key relationships.
> 2. Use the "dbTablePattern" configuration option.
> 3. The generated DBDatabase will add the same relations more than once.
> This is a major problem if you use empire-db to generate schemas with foreign key relationships.
If not, you can work around the problem by modifying the Database.vm template to exclude the
relations setup..

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