Ajax_scaffold demo

Rails
1

I’ve been working my way through installing AjaxScaffold 3.1.0 and
getting the associations_demo working. I’ve been correcting my various
misinterpretations (and outright guesses sometimes) to get thing working
but this one has me stumped. The forms all come up fine, but whenever I
click on a Create, Update, Edit, Delete, or even a Cancel link, the
little “working” animated ring comes up and never goes away. The action
is not performed and no error message appears, only the ring keeps
moving.

Does this scenario ring a bell for anyone who’s used (or created - hint,
hint to Richard W.) this demo? I’m new to Ruby and Rails, and I
haven’t learned yet how to set a breakpoint and step through my code.
Can anyone point me to the right areas to look and maybe give a quick
simple instruction on how to set a breakpoint there and step through? I
am not coming from a Java or PHP background; I’m a desktop database
application developer who wants to create a web-based version of an
application.

I messed something up between pet and pets and have been making little
corrections all along. Maybe that’s a clue? By the way, it would be
helpful for newbies to this demo to have the setup instructions from
beginning to end in one place, including the expected table structure.
This is such an amazing demo that does a big piece of what I need
Rails/Ajax to do.

Thanks, Shauna

2

The javascript debugger for firefox is called firebug. I agree that the
silent failures can be fairly annoying. I’m not sure whether that is
specific to ajax_scaffold, or is inherent in Rails itself.

3

Is the database getting updated when executing an action and your just
don’t see the answer from the server? or will the request never be
send.
You can find that out by looking at the logs/development.log file.

When you changed something in the tables (fieldnames, tablenames etc. )
I recomend to run the ajax scaffold generator again, if your not sure
what needs to be changed - that may fix your errors. Attention on
which files to overwrite.

you can read about the debuging stuff here:
http://wiki.rubyonrails.com/rails/pages/HowtoDebugWithBreakpoint

And there something like a javascript debugger for firefox - but I
don’t know how it’s called. ask google.

hope that helps

4

Shauna wrote:

hint to Richard W.) this demo? I’m new to Ruby and Rails, and I
beginning to end in one place, including the expected table structure.
This is such an amazing demo that does a big piece of what I need
Rails/Ajax to do.

Thanks, Shauna

–
Posted via http://www.ruby-forum.com/.

I’ve encountered this only when the server was not runing.

do a ps -x | grep server

you should see a line containing “ruby script/server”

5

H Shauna,
I’ve used Rich’s ajax scaffold generator extensively in my application
http://www.webtestlive.com. The spinning circles and the people/pets
demo did drive me bonkers for a few weeks.

The secret is to pay attention to pluralization of the model names.

If I was doing a Teachers/Students scaffold based on the People/Pets I
found it very helpful to write down this and keep referring to it while
making the changes to the scaffold

PEOPLE => PETS
TEACHERS => STUDENTS

So every time I see PETS I would substitute STUDENTS
Every time I see PERSON I would substitute TEACHER

The thing to watch for is the pluralisation.

The other thing to be careful with is model names with more than 1 word
e.g. STUDENT_SUBJECTS.

If you check your development.log file it should tell you what error has
occurred when you get spinning circles. You’ll probably find you keep
clearing the log and keeping it open a lot while debuggging!

hope this helps

–john

Shauna wrote:

I’ve been working my way through installing AjaxScaffold 3.1.0 and
getting the associations_demo working. I’ve been correcting my various
misinterpretations (and outright guesses sometimes) to get thing working
but this one has me stumped. The forms all come up fine, but whenever I
click on a Create, Update, Edit, Delete, or even a Cancel link, the
little “working” animated ring comes up and never goes away. The action
is not performed and no error message appears, only the ring keeps
moving.

Does this scenario ring a bell for anyone who’s used (or created - hint,
hint to Richard W.) this demo? I’m new to Ruby and Rails, and I
haven’t learned yet how to set a breakpoint and step through my code.
Can anyone point me to the right areas to look and maybe give a quick
simple instruction on how to set a breakpoint there and step through? I
am not coming from a Java or PHP background; I’m a desktop database
application developer who wants to create a web-based version of an
application.

I messed something up between pet and pets and have been making little
corrections all along. Maybe that’s a clue? By the way, it would be
helpful for newbies to this demo to have the setup instructions from
beginning to end in one place, including the expected table structure.
This is such an amazing demo that does a big piece of what I need
Rails/Ajax to do.

Thanks, Shauna