Re: cayenne-tutorial

[Andrus Adamchik <an...@objectstyle.org>]

As an FYI, this seems to be a bug in the Confluence Auto Export plugin  
- an incorrect version of the image is picked when there's more than 1  
version of the same image uploaded on the page. So I deleted and re- 
uploaded such images, and now waiting for the change to propagate to  
the site.

Andrus


On Oct 26, 2008, at 9:27 AM, Andrus Adamchik wrote:

> Aha... The screenshot problem was related to the site publishing  
> problem - the latest images weren't pushed to the live site. So  
> while I am working on straightening that out, you can use the  
> offline tutorial that can be found in the docs included in the  
> Cayenne download (the start page is "cayenne-2.0.x/doc/index.html").
>
> Andrus
>
> On Oct 26, 2008, at 9:15 AM, Andrus Adamchik wrote:
>
>> Hi Matt,
>>
>> On Oct 25, 2008, at 6:33 PM, Matt Crouch wrote:
>>> I  have several questions about the cayenne-tutorial project and  
>>> CayenneModeler
>>>
>>> 1. I'm having some problems with the UI in CayenneModeler. When  
>>> adding
>>> an attribute, I tab over to "Type" and expect that I can select  
>>> using
>>> arrow keys or typing. If I type a letter, the dropdown list arrow
>>> appears, but I can't change it's value. Is this normal?
>>>
>>> 2. In the DbRelationship Info dialog box I can't tab among inputs. I
>>> can tab to "Reverse Relationship" and back, but no further -- i.e.
>>> only the TextFields. If I do tab further, I can't get back inside
>>> them.
>>>
>>> Those aren't that important, just annoying as I can't stand having  
>>> to
>>> use the mouse for everything.
>>
>> Fair enough. Even in substantially reworked and improved  
>> CayenneModeler 3.0M5 (which is coming out soon), tabbing behavior  
>> is far from ideal. Something we'll need to improve upon.
>>
>>
>>> 3. There seem to be inconsistencies in the field naming in the
>>> tutorial. The data model at the top
>>> (http://cayenne.apache.org/doc20/tutorial-object-relational-mapping.data/database-schema.jpg 
>>> )
>>> indicates that ARTIST's primary key is called "ARTIST_ID", but the
>>> text says
>>>
>>> "Let's rename it to ID, make it an INTEGER and make it a PK:"
>>>
>>> The graphic immediately below this also indicates that the field is
>>> actually ARTIST_ID
>>>
>>> I didn't mind this and assumed a simple typo in the text, but
>>> GALLERY's primary key is just called "ID", for which see the "Repeat
>>> this procedure for PAINTING and GALLERY entities." graphic.
>>
>>> 4. The result of the above is that you can't actually do the  
>>> "Mapping
>>> Database Relationships" section. If my ARTIST pkey is called
>>> ARTIST_ID, that field is only available as a Source, not a target,  
>>> for
>>> the relationship
>>>
>>> After experimenting a bit, I discovered that if I ignore the  
>>> graphics
>>> and call the field ID, I can get the result from this section -- but
>>> *only if I create the ARTIST_ID field in the
>>> PAINTING entity first.
>>>
>>> I was inclined to think that the text simply forgot to say "make
>>> additional attributes to match the data model above" or something,  
>>> but
>>> in this case the primary keys would be called ARTIST_ID,  
>>> PAINTING_ID,
>>> etc. rather than just ID
>>>
>>> I find this pretty frustrating. The tut says I should repeat these
>>> steps for other relationships, but I can't tell if these were done
>>> right, because of the inconsistencies.
>>>
>>> M
>>
>> The 3.0 version of the tutorial has the DB schema diagram correct.  
>> "Repeat" means map all columns from the schema:
>>
>> http://cayenne.apache.org/doc/tutorial-object-relational-mapping.html
>>
>> Thanks for sharing the problems that you had - let me replace the  
>> broken Modeler screenshots and clarify some points in the text.
>>
>> Andrus
>>
>>
>
>