Re: Creating a EOModel in code
Re: Creating a EOModel in code
- Subject: Re: Creating a EOModel in code
- From: Hugi Thordarson via Webobjects-dev <email@hidden>
- Date: Fri, 26 Jun 2020 19:10:21 +0000
You might also want to take a look at Cayenne. It's well documented and we're
eager to help where the docs fall short. And most importantly; it's an active
and maintained project that didn't die over a decade ago :)
- hugi
> On 26 Jun 2020, at 19:04, Aaron Rosenzweig via Webobjects-dev
> <email@hidden> wrote:
>
> Hi Don,
>
> Have a look at EOEntity and friends: EOAttribute, EORelationship.
>
> You can build them out and setup the “external” name for the column, etc. I
> did it once as an exercise many moons ago. The only practical use I got out
> of it was sometimes sanity checking keyPaths to see if they hit things “in
> memory” or if they were completely traversable through EOEntity
> relationships. Something that trips an in-memory method call is not something
> you can use to build a complex SQL query.
>
> Like other people have said, the “reverse engineering” of the original WO
> tools is more likely what you want to use instead. You point Entity Modeler
> at a database and it can make a surprisingly good model file from it.
> Depending on how big the database is… it might be worth your trouble of
> firing up MacOS Tiger and installing the NeXTStep GUI tools to do the reverse
> engineering. I don’t think that the Eclipse java based EntityModeler can
> reverse engineer. I don’t know if Cayenne can reverse engineer.
> AARON ROSENZWEIG / Chat 'n Bike <http://www.chatnbike.com/>
> e: email@hidden <mailto:email@hidden> t: (301) 956-2319
>
>
>> On Jun 25, 2020, at 8:53 PM, Don Lindsay via Webobjects-dev
>> <email@hidden <mailto:email@hidden>>
>> wrote:
>>
>> Hello;
>>
>> The Documentation for EOModel states that you can build one in code, but
>> there are no examples or further information that I can find. Does anyone
>> have any documentation or samples that they can direct me to so I can create
>> EOModels while the application is running:
>>
>> What I want to do is connect to a database that my app does not know about,
>> someone provides connection parameters and I create an EOModel and connect
>> to that database or rest and access it using the EOModel created using new
>> EOModel().
>>
>> Thanks
>>
>> Don
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