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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CAY-1946) CDbimport improvements
Date Sun, 16 Nov 2014 12:53:34 GMT

    [ https://issues.apache.org/jira/browse/CAY-1946?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14213914#comment-14213914
] 

ASF GitHub Bot commented on CAY-1946:
-------------------------------------

Github user asfgit closed the pull request at:

    https://github.com/apache/cayenne/pull/31


> CDbimport improvements
> ----------------------
>
>                 Key: CAY-1946
>                 URL: https://issues.apache.org/jira/browse/CAY-1946
>             Project: Cayenne
>          Issue Type: Improvement
>          Components: Non-GUI Tools
>            Reporter: Alex Kolonitsky
>
> We’ve experimented with automated db-first approach to Cayenne modeling for more than
a year on a set of client projects. Roughly this approach means that DB evolution is managed
via external tools (e.g. liquibase) and Cayenne artifacts are managed using the following
POM configuration:
> <plugin>
> 	<groupId>org.apache.cayenne.plugins</groupId>
> 	<artifactId>maven-cayenne-plugin</artifactId>
> 	<configuration>
> 		...
> 	</configuration>
> 	<executions>
> 		<execution>
> 			<id>default-cli</id>
> 			<goals>
> 				<goal>cdbimport</goal>
> 				<goal>cgen</goal>
> 			</goals>
> 		</execution>
> 	</executions>
> </plugin>
> “cdbimport” ensures that Cayenne model is always in sync with DB, “cgen” - that
Java classes are in sync with the model. There are zero problems with “cgen", not so with
“cdbimport". If you control the schema, you get a decently named Java classes/properties
in 95% of the cases. Here we are trying to address the remaining 5% that make things ugly:
> * Inability to generate meaningful relationship names in many cases.
> * Inability to customize attribute/relationship names and data types.
> To solve this here we are proposing a merge algorithm that would preserve customizations
to the Obj* layer made by the user. And in addition to that a special descriptor that can
be used for more advanced filtering and customization of cdbimport process. Both of these
improvements will hopefully result in “cdbimport” becoming a tool of choice for Cayenne
work for many users.
> https://docs.google.com/document/d/1DF5-_mMDCuH7iUFhEFDm2q-ebVeSPgvOaymho88ywJ0/edit?pli=1



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