Re: Display database content on a page

[André Rothe]

Thank you for your responses! I have read the book, things are clearer
now. I will come back with further questions about locking and long
running requests...

Best regards
Andre


On 07.10.2017 16:14, Markus Ruggiero wrote:
> Andre,
> 
> please take this seriously
> 
> Chick Hill wrote:
> 
>> And it will also show you the correct and effective way to leverage WO
>> and Wonder.  The architecture is quite different from most other
>> frameworks and if you don’t make the adjustment to that, you will be
>> forever struggling against the intention of the frameworks.
> 
> One important thing to note (and this seems to be a major stumbling
> block for all non-WOers): We are programming objectoriented, we are not
> programming SQL / database stuff!!
> 
> When you think "OO" you think "object". An object encapsulates state and
> shows behavior. When you start to learn oo-programming you usually have
> instance variables and methods. The object's state is kept in the
> instance vars and the behavior is defined by the methods. It is good and
> strongly recommended style to make instance variables private (or maybe
> proteced) and create public accessors (getter and setter methods). One
> should never access an object's state directly (instance variables) from
> outside the object but access them through the getter and setter
> methods. This allows the object (actually the programmer writing the
> class) to re-implement the internal representation of state in any way
> that makes sense. Any piece of code using the getter/setter methods
> won't be affected by that.
> 
> The EOF allows you to implement objects in a way so that their internal
> state is not kept in instance variables but is connected to a database
> record. Correct oo-thinking says "I access the object's state via
> accessor methods. I don't care where/how the object manages to store
> that state". Your enterprise objects are based on classes that inherit
> from framework classes. There is functionality in those classes to
> pull/push state to/from a relational database. You as the "user" of the
> object DO NOT CARE! The EOF framework manages this for you.
> 
> You MUST NOT THINK "database/table/record" but THINK "OBJECT". 
> 
> Instead of asking "how do I retrieve customer records from the
> database?" you should think "how do I make the framework give me a list
> of customer objects that have their state backed by a record in the
> database?". With this in mind EOF becomes almost trivial to use. Any
> programmer coming from "standard java" background has a problem with
> this thinking because most persistence frameworks are more or less
> nicely built "sql generators". Thus one's thinking is often closer to
> "data record" instead of "object". Not so with Wonder and EOF. Just
> think "object" and you are all set.
> 
> With the EOModel you basically tell the EOF framework how to "map object
> thinking into a relational database". Let the framework do it, you are
> an oo-programmer!
> 
> Hope this clears things a bit.
> 
> Have fun
> ---markus---
> 
> 
>> On 6 Oct 2017, at 16:38, André Rothe > > wrote:
>>
>> Hi Markus,
>>
>> I'm on part C of the book...
>>
>> Best regards
>> Andre
>>
>> On 06.10.2017 15:51, Markus Ruggiero wrote:
>>> Hi Andre,
>>>
>>> I am the author of Learning the Wonders. If you have any question
>>> regarding the book you can reach me here or directly by writing to
>>> aut...@learningthewonders.com 
>>> .
>>> I'll be glad to help you get started.
>>>
>>> ---markus---
>>>
>>> PS 
>>> Chuck and Theo, thanks for the recommendation :-)))
>>> Yes, I use the book as official coursebook in formal education in
>>> Switzerland for the module "Object Oriented implementation of Multiuser
>>> Applications". This in itself has nothing to do with Wonder but
>>> everything with oo-concepts and I use Wonder/WebObjecs as a showcase for
>>> clean oo design.
>>>
>>>
 On 5 Oct 2017, at 23:12, Theodore Petrosky 
 > wrote:

 "Learning the Wonders" is the best book to start with. The author uses
 that book in classes he teaches (I believe in Germany).

 I would recommend that book to start with over the others that are
 available.

 All of the videos are available in the iTunes podcasts. I know the
 other links sometimes don’t work.

 Use the iTunes podcasts. go to podcasts, then select Store, then
 search for WebObjects.

 I know you mentioned that you viewed the two chapters of Leaning the
 Wonders. It really gets going after that.

 Ted



> On Oct 5, 2017, at 3:31 PM, Chuck Hill  
> > wrote:
>
> Here is a good place to start:
>
> 

Re: Display database content on a page

[Morris, Mark]

+1

— Mark

On Oct 7, 2017, at 9:14 AM, Markus Ruggiero 
> wrote:

Andre,

please take this seriously

Chick Hill wrote:

And it will also show you the correct and effective way to leverage WO and 
Wonder.  The architecture is quite different from most other frameworks and if 
you don’t make the adjustment to that, you will be forever struggling against 
the intention of the frameworks.

One important thing to note (and this seems to be a major stumbling block for 
all non-WOers): We are programming objectoriented, we are not programming SQL / 
database stuff!!

When you think "OO" you think "object". An object encapsulates state and shows 
behavior. When you start to learn oo-programming you usually have instance 
variables and methods. The object's state is kept in the instance vars and the 
behavior is defined by the methods. It is good and strongly recommended style 
to make instance variables private (or maybe proteced) and create public 
accessors (getter and setter methods). One should never access an object's 
state directly (instance variables) from outside the object but access them 
through the getter and setter methods. This allows the object (actually the 
programmer writing the class) to re-implement the internal representation of 
state in any way that makes sense. Any piece of code using the getter/setter 
methods won't be affected by that.

The EOF allows you to implement objects in a way so that their internal state 
is not kept in instance variables but is connected to a database record. 
Correct oo-thinking says "I access the object's state via accessor methods. I 
don't care where/how the object manages to store that state". Your enterprise 
objects are based on classes that inherit from framework classes. There is 
functionality in those classes to pull/push state to/from a relational 
database. You as the "user" of the object DO NOT CARE! The EOF framework 
manages this for you.

You MUST NOT THINK "database/table/record" but THINK "OBJECT".

Instead of asking "how do I retrieve customer records from the database?" you 
should think "how do I make the framework give me a list of customer objects 
that have their state backed by a record in the database?". With this in mind 
EOF becomes almost trivial to use. Any programmer coming from "standard java" 
background has a problem with this thinking because most persistence frameworks 
are more or less nicely built "sql generators". Thus one's thinking is often 
closer to "data record" instead of "object". Not so with Wonder and EOF. Just 
think "object" and you are all set.

With the EOModel you basically tell the EOF framework how to "map object 
thinking into a relational database". Let the framework do it, you are an 
oo-programmer!

Hope this clears things a bit.

Have fun
---markus---


On 6 Oct 2017, at 16:38, André Rothe 
> wrote:

Hi Markus,

I'm on part C of the book...

Best regards
Andre

On 06.10.2017 15:51, Markus Ruggiero wrote:
Hi Andre,

I am the author of Learning the Wonders. If you have any question
regarding the book you can reach me here or directly by writing to
aut...@learningthewonders.com 
.
I'll be glad to help you get started.

---markus---

PS
Chuck and Theo, thanks for the recommendation :-)))
Yes, I use the book as official coursebook in formal education in
Switzerland for the module "Object Oriented implementation of Multiuser
Applications". This in itself has nothing to do with Wonder but
everything with oo-concepts and I use Wonder/WebObjecs as a showcase for
clean oo design.


On 5 Oct 2017, at 23:12, Theodore Petrosky 

> wrote:

"Learning the Wonders" is the best book to start with. The author uses
that book in classes he teaches (I believe in Germany).

I would recommend that book to start with over the others that are
available.

All of the videos are available in the iTunes podcasts. I know the
other links sometimes don’t work.

Use the iTunes podcasts. go to podcasts, then select Store, then
search for WebObjects.

I know you mentioned that you viewed the two chapters of Leaning the
Wonders. It really gets going after that.

Ted



On Oct 5, 2017, at 3:31 PM, Chuck Hill 

> wrote:

Here is a good place to start:

https://www.amazon.com/Learning-Wonders-Markus-Ruggiero-ebook/dp/B00FCDHDAA
http://learningthewonders.com


Chuck

On 2017-10-05, 12:25 PM, 

Re: Display database content on a page

[Markus Ruggiero]

Andre,

please take this seriously

Chick Hill wrote:

> And it will also show you the correct and effective way to leverage WO and 
> Wonder.  The architecture is quite different from most other frameworks and 
> if you don’t make the adjustment to that, you will be forever struggling 
> against the intention of the frameworks.


One important thing to note (and this seems to be a major stumbling block for 
all non-WOers): We are programming objectoriented, we are not programming SQL / 
database stuff!!

When you think "OO" you think "object". An object encapsulates state and shows 
behavior. When you start to learn oo-programming you usually have instance 
variables and methods. The object's state is kept in the instance vars and the 
behavior is defined by the methods. It is good and strongly recommended style 
to make instance variables private (or maybe proteced) and create public 
accessors (getter and setter methods). One should never access an object's 
state directly (instance variables) from outside the object but access them 
through the getter and setter methods. This allows the object (actually the 
programmer writing the class) to re-implement the internal representation of 
state in any way that makes sense. Any piece of code using the getter/setter 
methods won't be affected by that.

The EOF allows you to implement objects in a way so that their internal state 
is not kept in instance variables but is connected to a database record. 
Correct oo-thinking says "I access the object's state via accessor methods. I 
don't care where/how the object manages to store that state". Your enterprise 
objects are based on classes that inherit from framework classes. There is 
functionality in those classes to pull/push state to/from a relational 
database. You as the "user" of the object DO NOT CARE! The EOF framework 
manages this for you.

You MUST NOT THINK "database/table/record" but THINK "OBJECT". 

Instead of asking "how do I retrieve customer records from the database?" you 
should think "how do I make the framework give me a list of customer objects 
that have their state backed by a record in the database?". With this in mind 
EOF becomes almost trivial to use. Any programmer coming from "standard java" 
background has a problem with this thinking because most persistence frameworks 
are more or less nicely built "sql generators". Thus one's thinking is often 
closer to "data record" instead of "object". Not so with Wonder and EOF. Just 
think "object" and you are all set.

With the EOModel you basically tell the EOF framework how to "map object 
thinking into a relational database". Let the framework do it, you are an 
oo-programmer!

Hope this clears things a bit.

Have fun
---markus---


> On 6 Oct 2017, at 16:38, André Rothe  wrote:
> 
> Hi Markus,
> 
> I'm on part C of the book...
> 
> Best regards
> Andre
> 
> On 06.10.2017 15:51, Markus Ruggiero wrote:
>> Hi Andre,
>> 
>> I am the author of Learning the Wonders. If you have any question
>> regarding the book you can reach me here or directly by writing to
>> aut...@learningthewonders.com .
>> I'll be glad to help you get started.
>> 
>> ---markus---
>> 
>> PS 
>> Chuck and Theo, thanks for the recommendation :-)))
>> Yes, I use the book as official coursebook in formal education in
>> Switzerland for the module "Object Oriented implementation of Multiuser
>> Applications". This in itself has nothing to do with Wonder but
>> everything with oo-concepts and I use Wonder/WebObjecs as a showcase for
>> clean oo design.
>> 
>> 
>>> On 5 Oct 2017, at 23:12, Theodore Petrosky >> > wrote:
>>> 
>>> "Learning the Wonders" is the best book to start with. The author uses
>>> that book in classes he teaches (I believe in Germany).
>>> 
>>> I would recommend that book to start with over the others that are
>>> available.
>>> 
>>> All of the videos are available in the iTunes podcasts. I know the
>>> other links sometimes don’t work.
>>> 
>>> Use the iTunes podcasts. go to podcasts, then select Store, then
>>> search for WebObjects.
>>> 
>>> I know you mentioned that you viewed the two chapters of Leaning the
>>> Wonders. It really gets going after that.
>>> 
>>> Ted
>>> 
>>> 
>>> 
 On Oct 5, 2017, at 3:31 PM, Chuck Hill > wrote:
 
 Here is a good place to start:
 
 https://www.amazon.com/Learning-Wonders-Markus-Ruggiero-ebook/dp/B00FCDHDAA
 http://learningthewonders.com
 
 
 Chuck
 
 On 2017-10-05, 12:25 PM, "Webobjects-dev on behalf of André Rothe"
  wrote:
 
   Am 2017-10-05 20:10, schrieb Theodore Petrosky:
> You are working too hard!
 
   :-)
 
> you need to look at all the examples. what you are 

Re: Display database content on a page

[Chuck Hill]

And it will also show you the correct and effective way to leverage WO and 
Wonder.  The architecture is quite different from most other frameworks and if 
you don’t make the adjustment to that, you will be forever struggling against 
the intention of the frameworks.

Chuck


From: Webobjects-dev 
<webobjects-dev-bounces+chill=gevityinc@lists.apple.com> on behalf of 
Markus Ruggiero <mailingli...@kataputt.com>
Date: Friday, October 6, 2017 at 6:51 AM
To: "webobjects-dev@lists.apple.com" <webobjects-dev@lists.apple.com>
Subject: Re: Display database content on a page

Hi Andre,

I am the author of Learning the Wonders. If you have any question regarding the 
book you can reach me here or directly by writing to 
aut...@learningthewonders.com<mailto:aut...@learningthewonders.com>. I'll be 
glad to help you get started.

---markus---

PS
Chuck and Theo, thanks for the recommendation :-)))
Yes, I use the book as official coursebook in formal education in Switzerland 
for the module "Object Oriented implementation of Multiuser Applications". This 
in itself has nothing to do with Wonder but everything with oo-concepts and I 
use Wonder/WebObjecs as a showcase for clean oo design.


On 5 Oct 2017, at 23:12, Theodore Petrosky 
<tedp...@yahoo.com<mailto:tedp...@yahoo.com>> wrote:

"Learning the Wonders" is the best book to start with. The author uses that 
book in classes he teaches (I believe in Germany).

I would recommend that book to start with over the others that are available.

All of the videos are available in the iTunes podcasts. I know the other links 
sometimes don’t work.

Use the iTunes podcasts. go to podcasts, then select Store, then search for 
WebObjects.

I know you mentioned that you viewed the two chapters of Leaning the Wonders. 
It really gets going after that.

Ted




On Oct 5, 2017, at 3:31 PM, Chuck Hill 
<ch...@gevityinc.com<mailto:ch...@gevityinc.com>> wrote:

Here is a good place to start:

https://www.amazon.com/Learning-Wonders-Markus-Ruggiero-ebook/dp/B00FCDHDAA
http://learningthewonders.com


Chuck

On 2017-10-05, 12:25 PM, "Webobjects-dev on behalf of André Rothe" 
<webobjects-dev-bounces+chill=gevityinc@lists.apple.com on behalf of 
andre.ro...@phosco.info> wrote:

  Am 2017-10-05 20:10, schrieb Theodore Petrosky:

You are working too hard!

  :-)


you need to look at all the examples. what you are asking for is so
simple (when you know how).

  LOL, exact. When you know how and where... The problem is, that a lot of
  WebObjects links on the internet are dead.


Have you used EOModeler to build your model?

  Yes, I have.


I recommend you look at these videos:

  50% of these videos I have already watched (and downloaded). A lot
  things you don't understand at the first time you will watch the video,
  because the WO community has its own "language", so it is hard to follow
  the concepts.

  Nevertheless, I have downloaded the examples for the WebObjects
  Developer's Guide. This book is not bad, but it doesn't summarize the
  workflows. So I have to read all the pages to find a hint for a specific
  problem. That is also a problem to find something, if you cannot name
  the problem with the correct "WO Community term".

  My question refers to WOTable. In the meantime I have decompiled
  WORepetition and find out, that you have to set components into the
  WOTable tags, one component for every column of the database table,
  which I need. The output of WOTable base on the "list" attribute, which
  needs an NSArray or List and the "item" attribute, which is of the type
  of the underlying database table.

  As I sent my question, I thought, that WOTable creates output for all
  attributes of the "item" automatically, so I tried to reduce the
  attributes of "item" before it will be visible to WOTable. But that was
  a fault.

  Sorry for my "simple" questions, but this is a learning process. And
  there are almost 20 years between my knowlegde of WebObjects and the
  knowledge of the other readers here.

  Best regards
  Andre
   ___
  Do not post admin requests to the list. They will be ignored.
  Webobjects-dev mailing list  (Webobjects-dev@lists.apple.com)
  Help/Unsubscribe/Update your Subscription:
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 __

Re: Display database content on a page

[Markus Ruggiero]

Hi Andre,

I am the author of Learning the Wonders. If you have any question regarding the 
book you can reach me here or directly by writing to 
aut...@learningthewonders.com . I'll be 
glad to help you get started.

---markus---

PS 
Chuck and Theo, thanks for the recommendation :-)))
Yes, I use the book as official coursebook in formal education in Switzerland 
for the module "Object Oriented implementation of Multiuser Applications". This 
in itself has nothing to do with Wonder but everything with oo-concepts and I 
use Wonder/WebObjecs as a showcase for clean oo design.


> On 5 Oct 2017, at 23:12, Theodore Petrosky  wrote:
> 
> "Learning the Wonders" is the best book to start with. The author uses that 
> book in classes he teaches (I believe in Germany).
> 
> I would recommend that book to start with over the others that are available.
> 
> All of the videos are available in the iTunes podcasts. I know the other 
> links sometimes don’t work.
> 
> Use the iTunes podcasts. go to podcasts, then select Store, then search for 
> WebObjects.
> 
> I know you mentioned that you viewed the two chapters of Leaning the Wonders. 
> It really gets going after that.
> 
> Ted
> 
> 
> 
>> On Oct 5, 2017, at 3:31 PM, Chuck Hill  wrote:
>> 
>> Here is a good place to start:
>> 
>> https://www.amazon.com/Learning-Wonders-Markus-Ruggiero-ebook/dp/B00FCDHDAA
>> http://learningthewonders.com
>> 
>> 
>> Chuck
>> 
>> On 2017-10-05, 12:25 PM, "Webobjects-dev on behalf of André Rothe" 
>> > andre.ro...@phosco.info> wrote:
>> 
>>   Am 2017-10-05 20:10, schrieb Theodore Petrosky:
>>> You are working too hard!
>> 
>>   :-)
>> 
>>> you need to look at all the examples. what you are asking for is so
>>> simple (when you know how).
>> 
>>   LOL, exact. When you know how and where... The problem is, that a lot of 
>>   WebObjects links on the internet are dead.
>> 
>>> Have you used EOModeler to build your model?
>> 
>>   Yes, I have.
>> 
>>> I recommend you look at these videos:
>> 
>>   50% of these videos I have already watched (and downloaded). A lot 
>>   things you don't understand at the first time you will watch the video, 
>>   because the WO community has its own "language", so it is hard to follow 
>>   the concepts.
>> 
>>   Nevertheless, I have downloaded the examples for the WebObjects 
>>   Developer's Guide. This book is not bad, but it doesn't summarize the 
>>   workflows. So I have to read all the pages to find a hint for a specific 
>>   problem. That is also a problem to find something, if you cannot name 
>>   the problem with the correct "WO Community term".
>> 
>>   My question refers to WOTable. In the meantime I have decompiled 
>>   WORepetition and find out, that you have to set components into the 
>>   WOTable tags, one component for every column of the database table, 
>>   which I need. The output of WOTable base on the "list" attribute, which 
>>   needs an NSArray or List and the "item" attribute, which is of the type 
>>   of the underlying database table.
>> 
>>   As I sent my question, I thought, that WOTable creates output for all 
>>   attributes of the "item" automatically, so I tried to reduce the 
>>   attributes of "item" before it will be visible to WOTable. But that was 
>>   a fault.
>> 
>>   Sorry for my "simple" questions, but this is a learning process. And 
>>   there are almost 20 years between my knowlegde of WebObjects and the 
>>   knowledge of the other readers here.
>> 
>>   Best regards
>>   Andre
>>___
>>   Do not post admin requests to the list. They will be ignored.
>>   Webobjects-dev mailing list  (Webobjects-dev@lists.apple.com)
>>   Help/Unsubscribe/Update your Subscription:
>>   
>> https://lists.apple.com/mailman/options/webobjects-dev/chill%40gevityinc.com
>> 
>>   This email sent to ch...@gevityinc.com
>> 
>> 
> 
> ___
> Do not post admin requests to the list. They will be ignored.
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> Help/Unsubscribe/Update your Subscription:
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Re: Display database content on a page

[Theodore Petrosky]

"Learning the Wonders" is the best book to start with. The author uses that 
book in classes he teaches (I believe in Germany).

I would recommend that book to start with over the others that are available.

All of the videos are available in the iTunes podcasts. I know the other links 
sometimes don’t work.

Use the iTunes podcasts. go to podcasts, then select Store, then search for 
WebObjects.

I know you mentioned that you viewed the two chapters of Leaning the Wonders. 
It really gets going after that.

Ted



> On Oct 5, 2017, at 3:31 PM, Chuck Hill  wrote:
> 
> Here is a good place to start:
> 
> https://www.amazon.com/Learning-Wonders-Markus-Ruggiero-ebook/dp/B00FCDHDAA
> http://learningthewonders.com
> 
> 
> Chuck
> 
> On 2017-10-05, 12:25 PM, "Webobjects-dev on behalf of André Rothe" 
>  andre.ro...@phosco.info> wrote:
> 
>Am 2017-10-05 20:10, schrieb Theodore Petrosky:
>> You are working too hard!
> 
>:-)
> 
>> you need to look at all the examples. what you are asking for is so
>> simple (when you know how).
> 
>LOL, exact. When you know how and where... The problem is, that a lot of 
>WebObjects links on the internet are dead.
> 
>> Have you used EOModeler to build your model?
> 
>Yes, I have.
> 
>> I recommend you look at these videos:
> 
>50% of these videos I have already watched (and downloaded). A lot 
>things you don't understand at the first time you will watch the video, 
>because the WO community has its own "language", so it is hard to follow 
>the concepts.
> 
>Nevertheless, I have downloaded the examples for the WebObjects 
>Developer's Guide. This book is not bad, but it doesn't summarize the 
>workflows. So I have to read all the pages to find a hint for a specific 
>problem. That is also a problem to find something, if you cannot name 
>the problem with the correct "WO Community term".
> 
>My question refers to WOTable. In the meantime I have decompiled 
>WORepetition and find out, that you have to set components into the 
>WOTable tags, one component for every column of the database table, 
>which I need. The output of WOTable base on the "list" attribute, which 
>needs an NSArray or List and the "item" attribute, which is of the type 
>of the underlying database table.
> 
>As I sent my question, I thought, that WOTable creates output for all 
>attributes of the "item" automatically, so I tried to reduce the 
>attributes of "item" before it will be visible to WOTable. But that was 
>a fault.
> 
>Sorry for my "simple" questions, but this is a learning process. And 
>there are almost 20 years between my knowlegde of WebObjects and the 
>knowledge of the other readers here.
> 
>Best regards
>Andre
> ___
>Do not post admin requests to the list. They will be ignored.
>Webobjects-dev mailing list  (Webobjects-dev@lists.apple.com)
>Help/Unsubscribe/Update your Subscription:
>
> https://lists.apple.com/mailman/options/webobjects-dev/chill%40gevityinc.com
> 
>This email sent to ch...@gevityinc.com
> 
> 

 ___
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Re: Display database content on a page

[Chuck Hill]

Here is a good place to start:

https://www.amazon.com/Learning-Wonders-Markus-Ruggiero-ebook/dp/B00FCDHDAA
http://learningthewonders.com


Chuck

On 2017-10-05, 12:25 PM, "Webobjects-dev on behalf of André Rothe" 
 wrote:

Am 2017-10-05 20:10, schrieb Theodore Petrosky:
> You are working too hard!

:-)

> you need to look at all the examples. what you are asking for is so
> simple (when you know how).

LOL, exact. When you know how and where... The problem is, that a lot of 
WebObjects links on the internet are dead.

> Have you used EOModeler to build your model?

Yes, I have.

> I recommend you look at these videos:

50% of these videos I have already watched (and downloaded). A lot 
things you don't understand at the first time you will watch the video, 
because the WO community has its own "language", so it is hard to follow 
the concepts.

Nevertheless, I have downloaded the examples for the WebObjects 
Developer's Guide. This book is not bad, but it doesn't summarize the 
workflows. So I have to read all the pages to find a hint for a specific 
problem. That is also a problem to find something, if you cannot name 
the problem with the correct "WO Community term".

My question refers to WOTable. In the meantime I have decompiled 
WORepetition and find out, that you have to set components into the 
WOTable tags, one component for every column of the database table, 
which I need. The output of WOTable base on the "list" attribute, which 
needs an NSArray or List and the "item" attribute, which is of the type 
of the underlying database table.

As I sent my question, I thought, that WOTable creates output for all 
attributes of the "item" automatically, so I tried to reduce the 
attributes of "item" before it will be visible to WOTable. But that was 
a fault.

Sorry for my "simple" questions, but this is a learning process. And 
there are almost 20 years between my knowlegde of WebObjects and the 
knowledge of the other readers here.

Best regards
Andre
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Re: Display database content on a page

[André Rothe]

Am 2017-10-05 20:10, schrieb Theodore Petrosky:

You are working too hard!


:-)


you need to look at all the examples. what you are asking for is so
simple (when you know how).


LOL, exact. When you know how and where... The problem is, that a lot of 
WebObjects links on the internet are dead.



Have you used EOModeler to build your model?


Yes, I have.


I recommend you look at these videos:


50% of these videos I have already watched (and downloaded). A lot 
things you don't understand at the first time you will watch the video, 
because the WO community has its own "language", so it is hard to follow 
the concepts.


Nevertheless, I have downloaded the examples for the WebObjects 
Developer's Guide. This book is not bad, but it doesn't summarize the 
workflows. So I have to read all the pages to find a hint for a specific 
problem. That is also a problem to find something, if you cannot name 
the problem with the correct "WO Community term".


My question refers to WOTable. In the meantime I have decompiled 
WORepetition and find out, that you have to set components into the 
WOTable tags, one component for every column of the database table, 
which I need. The output of WOTable base on the "list" attribute, which 
needs an NSArray or List and the "item" attribute, which is of the type 
of the underlying database table.


As I sent my question, I thought, that WOTable creates output for all 
attributes of the "item" automatically, so I tried to reduce the 
attributes of "item" before it will be visible to WOTable. But that was 
a fault.


Sorry for my "simple" questions, but this is a learning process. And 
there are almost 20 years between my knowlegde of WebObjects and the 
knowledge of the other readers here.


Best regards
Andre
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Re: Display database content on a page

[Aaron Rosenzweig]

André you are thinking too hard.

You make a mapping with the EOModel between a java object and the database. 
When you fetch the entire java object is faulted in and relationships are 
faulted as they are needed. You access the relationships and attributes of the 
java object.

If you really want to fetch individual things by hand… sometimes this makes 
sense… then try “rawRowsForSQL()”

AARON ROSENZWEIG / Chat 'n Bike 
e:  aa...@chatnbike.com   t:  (301) 956-2319



> On Oct 5, 2017, at 1:50 PM, André Rothe  wrote:
> 
> Hi,
> 
> How I can select the columns of a database table before they will be visible 
> on the page (display not all columns of the database table on the page)? As I 
> have learned, EOQualifier builds the WHERE clause, but what builds the SELECT 
> part? Is there a tutorial which handles this question?
> 
> Best regards
> Andre
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