Re: Creating a EOModel in code
Re: Creating a EOModel in code
- Subject: Re: Creating a EOModel in code
- From: Jesse Tayler via Webobjects-dev <email@hidden>
- Date: Fri, 26 Jun 2020 15:32:04 -0400
so, my simple EOF/ERXKey qualifiers and stuff would work, I’d use EOModeler?
MySQL works fine it sounds, I’m using AWS stuff myself…
> On Jun 26, 2020, at 3:27 PM, Hugi Thordarson <email@hidden> wrote:
>
>> Ok, so are all the cool guys using Cayenne now then?
>
> I've seen some pretty cool guys use it but I also use it.
>
>
>> I'm sure I should read some page about it rather than waste everyone’s time
>> reiterating why it’s better and why we should be moving to that sort of
>> thing etc.
>
> It's awesome in so many ways. But for people that already know EOF, it's
> probably best described as "EOF without that darned locking thing". And
> there's seriously exciting stuff happening in the most recent releases
> (subqueries, SQL-functions and more, all type safe using "Properties", the
> Cayenne version of ERXKey.
>
> API-wise it can pretty much be a drop-in replacement for EOF and from
> experience I can say there's nothing to lose and much to gain. (assuming
> you're using an SQL db. Cayenne is explicitly an SQL DB framework, not a
> "generic everything framework" like EOF wants to be).
>
> - hugi
>
>
>>> On Jun 26, 2020, at 3:10 PM, Hugi Thordarson via Webobjects-dev
>>> <email@hidden> wrote:
>>>
>>> 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
>>>> e: email@hidden t: (301) 956-2319
>>>>
>>>>
>>>>> On Jun 25, 2020, at 8:53 PM, Don Lindsay via Webobjects-dev
>>>>> <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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