Ruby on Rails

thank you Mike.

Good that you pointed out railstutorial.org. I just checked and Michael
Hartl has updated the Learn Rails by Example to version 4. There is a
free version here to read online:
http://www.railstutorial.org/book/beginning

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Until Rails 4.0.4 everything was working fine until I upgraded to latest
Rails version. It seems to be a bug because from the error message looks
like rails is doing just a count(Bla bla )without using properly using a
select count(id) from (SELECT COUNT(orders_header.id,
orders_header.created_at) FROM `orders_header` WHERE (shop_id=99 and
customer_id=1 and hash_key like
'539de64e8793790430052bc861dd0ff521334e32')

Is there a workaround for this problem?

query= OrderHeader.select("orders_header.id,
orders_header.created_at").where("shop_id=#{shop_id} and
customer_id=#{customer_id} and hash_key like
'#{current_hash_key}'").order("id desc")
if query.nil?
return true # no duplicates found
end
if (query.count>0) # duplicates found
# I get the error righ here
end
ERROR
SELECT COUNT(orders_header.id, orders_header.created_at) FROM
`orders_header` WHERE (shop_id=99 and customer_id=1 and hash_key like
'539de64e8793790430052bc861dd0ff521334e32')
Mysql2::Error: You have an error in your SQL syntax; check the manual
that corresponds to your MySQL server version for the right syntax to
use near ' orders_header.created_at) FROM `orders_header` WHERE
(shop_id=99 and customer_' at line 1: SELECT COUNT(orders_header.id,
orders_header.created_at) FROM `orders_header` WHERE (shop_id=99 and
customer_id=1 and hash_key like
'539de64e8793790430052bc861dd0ff521334e32')

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I've put my favicon into app/assets/images and include in my header

<%= favicon_link_tag 'my_favicon.jpg' %>

The favicon is correctly recognized by the browser, so it works
perfectly. When viewing the source code, I see to my surprise that the
following HTML code is generated:

<link href="/assets/my_favicon.jpg" rel="shortcut icon"
type="image/vnd.microsoft.icon" />

Aside from the MIME type (I had expected that rails would generate
image/jpeg), what really puzzles me is the path. The file is definitely
in /assets/images, not in /assets . How can the browser locate the file?

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Hi guys,

I'm one of the authors of Feedly (python). So it does sound exactly like
what you're looking for but in the wrong language :)

The same team behind Feedly is also offering a hosted solution now
called getstream.io
Have a look at the getting started, https://getstream.io/get_started/
We have client libraries available for Ruby, PHP, Python and Node.

Internally its using a highly optimized system with Cassandra. It will
be substantially cheaper than running your own Redis cluster. In
addition it's currently in Beta, which means its free and comes with
free tech support :)

In case you are looking for building your own solution have a look at
this article on highscalability:
http://highscalability.com/blog/2013/10/28/design-decisions-for-scaling-your-high-traffic-feeds.html

Cheers,
Thierry

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Please change my email address:

jimandirenewhite@gmail.com

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I resolved that problem.

I done somethig like so to update each column:

def update_multiple
@postis = Posti.find(params[:posti_ids])

@postis.each do |posti|
posti.update_column(:stato, params[:posti])
end
redirect_to prenotazione_path(params[:spectacle_id])
end

<%= form_for :posti, :url => update_multiple_path, :html => { :method =>
:put } do |f| %>
<%= hidden_field_tag "spectacle_id", params[:spectacle_id] %>
<strong>Posti scelti:</strong>
<ul>
<% for posti in @postis %>
<li>
<%=h posti.numero %>

<%= hidden_field_tag "posti_ids[]", posti.id %>
</li>
<% end %>
</ul>

<p>

<%= f.hidden_field :stato, :value => "checked" %>
</p>
<p><%= f.submit "PRENOTA" %></p>
<% end %>

It works very well and i am so very happy. Thank you Colin for helps. I
will very well a tutorial when i will finish all my esams at university.
Ruby on Rails is the best :)

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On 28 May 2014 19:32, Sheyam Selvaraj <smartsheyam@gmail.com> wrote:
> When I try to run my Ruby on Rails app it shows the error page
> I tried rake db:drop
> rake db:create
> rake db:migrate
> rake db:seed
> still the problem persists
> how can I fix this issue

It is not a good idea to post an image, just copy/paste the important
text here. It is even worse if you just post html into a text email
so that the image does not even appear. Have a look in
development.log first though, often there is useful information there.

Also do the rake messages you posted work ok?
You say you get the error when you run the app, what do you mean by 'run' it?

Colin

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I have a rails application for a research group and the data just grows.
One requested feature in the application is to provide a way to track
the changes made in the data. I have used PaperTrail for this and is
quite efficient for just tracking the changes.

The problem I am in is that there needs to be a way to download the data
at a particular instance and share this URL so that other researchers
can view at the exact same data. I am completely lost at how to achieve
this functionality. Additionally, the models have some associations
between them.
For eg:
Models: Coral, Observation, Measurement, Location
They have a number of associations like many-to-many, one-to-many etc.

Questions
1. How can I version the database so that there can be a URL which
points to the exact data during that version ?
2. Should I create an API for that ?

Please help me :)

Regards
Suren

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gon is great, and easy to use.

On Friday, May 30, 2014, Dave Sims <davsims@gmail.com> wrote:

I've used the gon gem for this and liked it quite a bit.

https://github.com/gazay/gon

Pierre-Andre M. wrote:

I have a variable created by some ruby in my controller that looks like
this:

@begpoint = row["begpoint"]


and I want to pass it into some js that is referenced from within my
view:

view:

   <% javascript_include_tag "play_time" %>



js (play_time):

I am trying to pass "<beg-point>  into the js [obviously that<>  is not
the right syntax just trying to denote where'd id like the variable to
end up]


var endtime =<beg-point>+10;
myPlayer= document.getElementById('example_video_1');
myPlayer.addEventListener('loadeddata', function(){
     myPlayer.currentTime = 10505.89;
     myPlayer.play();
     myPlayer.addEventListener('timeupdate', function(){
     if (myPlayer.currentTime>= endtime) {
         myPlayer.pause();
     }


Can anyone help?  Thanks

     }, false);

}, false);

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 greatghoul - Ask and Learn!

I've used the gon gem for this and liked it quite a bit.

https://github.com/gazay/gon

Pierre-Andre M. wrote:

I have a variable created by some ruby in my controller that looks like
this:

@begpoint = row["begpoint"]


and I want to pass it into some js that is referenced from within my
view:

view:

   <% javascript_include_tag "play_time" %>



js (play_time):

I am trying to pass "<beg-point>  into the js [obviously that<>  is not
the right syntax just trying to denote where'd id like the variable to
end up]


var endtime =<beg-point>+10;
myPlayer= document.getElementById('example_video_1');
myPlayer.addEventListener('loadeddata', function(){
     myPlayer.currentTime = 10505.89;
     myPlayer.play();
     myPlayer.addEventListener('timeupdate', function(){
     if (myPlayer.currentTime>= endtime) {
         myPlayer.pause();
     }


Can anyone help?  Thanks

     }, false);

}, false);

Pierre-Andre M. wrote in post #1147586:
> I have a variable created by some ruby in my controller that looks like
> this:
>
> @begpoint = row["begpoint"]
>
>
> and I want to pass it into some js that is referenced from within my
> view:

There are several way of doing this, but the simplest is to use HTML5
data- attributes.

Example:

HTML:

<body data-begpoint="<%= @begpoint %>">
... page content
</body>

jQuery:

var begpoint;

$(funtion() {
begpoint = $('body').data('begpoint');
});

So to think of is as "pass it to JavaScript" is sort of inside out. You
use JavaScript to "get" the value from the DOM. jQuery gives you nice
syntax for doing just that.

This is good for relatively small amount of data. If you need lots of
data in your JavaScript there are alternatives to this technique. A good
place to learn something about those techniques is something like
Backbone.js, Ember.js or Angular.

http://backbonejs.org
http://emberjs.com
https://angularjs.org

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I have a variable created by some ruby in my controller that looks like
this:

@begpoint = row["begpoint"]


and I want to pass it into some js that is referenced from within my
view:

view:

<% javascript_include_tag "play_time" %>



js (play_time):

I am trying to pass "<beg-point> into the js [obviously that <> is not
the right syntax just trying to denote where'd id like the variable to
end up]


var endtime = <beg-point>+10;
myPlayer= document.getElementById('example_video_1');
myPlayer.addEventListener('loadeddata', function(){
myPlayer.currentTime = 10505.89;
myPlayer.play();
myPlayer.addEventListener('timeupdate', function(){
if (myPlayer.currentTime >= endtime) {
myPlayer.pause();
}


Can anyone help? Thanks

}, false);

}, false);

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Wow...I was very close. my issue was currentTime vs currenttime. A
Captial-T was the answer to all my woes.

The lower-case t created a new function (currenttime) that it seemed to
have no idea what to do with other than put the value in it that I
passed.

Any who on to the next challenge.

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On 28 May 2014 22:35, Simon Eric <lists@ruby-forum.com> wrote:
> @postis is an string.

No it isn't, you had
@postis = Posti.where(:stato => "unchecked" , :spectacle_id =>
params[:spectacle_id] , :hall_num => params[:sala])
so why would it be a string? The method 'where' returns (effectively)
an array of records, hence the error you saw. So *please* just work
right through a good tutorial. the time spent will be repaid many
times over.

Colin

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Walter...I tried my best to get this to some public location to no
avail.

at this point I changed everything to myPlayer


var endtime = 10505.89+10;
myPlayer= document.getElementById('example_video_1');
myPlayer.addEventListener('loadeddata', function(){
myPlayer.currenttime = 10505.89;
myPlayer.play();
myPlayer.addEventListener('timeupdate', function(){
if (myPlayer.currentTime >= endtime) {
myPlayer.pause();
}

}, false);

}, false);

When I use the debugger in Google Chrome I'm no longer getting any
errors...however the script doesn't seem to be executing. In the
javascript console within the browser the only thing I've been able to
get working FOR SURE is myPlayer.play() and myPlayer.pause

When I try myPlayer.currenttime=20 it returns the value "20" but still
wont play at that time. I've been going around in circles on this for
days. very frustrated since it works great outside of rails.

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A lot of really helpful people on these forums.

I'll bet this person went ahead and did this:

production:
secret_key_base: 12345

Someone probably could have mentioned that <%= ENV["SECRET_KEY_BASE"] %>
loads the config from something called an "environment variable", in
this case SECRET_KEY_BASE, which has to be defined per-server, and they
should go read up on where to define it for their particular system.

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On May 29, 2014, at 12:56 PM, Asa Romberger wrote:

> I am working on a Rails app where people sign up and have a profile. When they are first signing up, they fill in their profile but I have an additional question when they are creating their account that alters the initial configuration of the account but is never used afterwards, so I don't want to include it in the profile. It is a multiple choice question with certain validation rules. How do I go about including this in the form?

How serious do these validations need to be? You may be able to do all of this in the view, using JavaScript for validation. As long as the result of the choice being made here is backed up by actual validations on your model, you should be fine.

Walter

>
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