[jira] Commented: (CAY-155) More object-centric modeling tool

["Joseph Schmidt (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CAY-155?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12689494#action_12689494 ] 

Joseph Schmidt commented on CAY-155:
------------------------------------

Please split (or re-edit this issue) to contain only the first paragraph of text (to be in sync with the title - since this issue is about being object-centric, so it has nothing to do with CAY-762 ).

I think an object-centric feature is just what Cayenne Modeler is missing.
This would mean that for the user to work and think only about it's objects (ObjEntites) - similar like in RubyOnRails or other frameworks where the users works only with the Object Model (and the framework takes care of the rest).

How could it work for the user.
#1. On the Welcome Screen, there could be new button: New Object-Centric Project (or a better naming), or a project/tool setting for this "object-centric" mode.
#2 Click-ing it (or having that setting), the project would be in "object mode", i.e. no database info will be displayed in the screens, or those fields should be read-only (and filled/updated automatically by Cayenne).
#3 Reverse engineering a database (with default settings) fills everything correctly right now too. In object-centric mode, the DB related fields in those screens would be just read-only.
#4 Adding a new Object Entity, would auto-generate the corresponding DBEntites and Fields and mapping - the same way it's done for reverse engineering. So this issue is mainly about having automatic *forward engineering* in CM.
#5 Editing/deleting attributes and relationships of existing ObjEntites would also update automatically the DB fields (the same way it happens at reverse engineering).
#6 Calling generate database schema would of course generate everything like it does right now too.

Thanks,
Joseph.



> More object-centric modeling tool
> ---------------------------------
>
>                 Key: CAY-155
>                 URL: https://issues.apache.org/jira/browse/CAY-155
>             Project: Cayenne
>          Issue Type: New Feature
>          Components: CayenneModeler GUI
>    Affects Versions: 1.2 branch
>            Reporter: Claudio Rosati
>            Assignee: Andrus Adamchik
>
> For DB-unaware users that want to *CREATE* a new DB and its object model, the GUI modeling tool sould let the user to model just ObjEntities not DbEntities, automatically creating DB entities and relationships as needed.
> The best will be having a GUI that lets user to manipulate UML-like objects and relations (maybe using open source graph libraries like JGraph or Piccolo for graphics): ObjEntities can be created, class hierarchies and relationships defined drawing lines between ObjEntities and so on.

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