javascript with embedded ruby

[Rynn Steinbolt]

Hi folks!

Im currently trying to generate diagrams with a js lib and rails. It
doesn't work, though, since I can't figure out how to embed ruby code to
supply the diagrams with data. My editor highlights the ruby code
weirdly,
too, with I take as a hint for wrong ruby syntax.
The diagrams work if I use the pure-js sample data, but it REALLY dont
want to input data sets with 200 items by hand.

The snippet in question is this one, it lives in an .html.erb file:

var hour = [
<% @raw.each do |raw| %>
[ <%= if raw.status == "aufgewacht" %>
<%= Time.parse(raw.timestamp).wday.to_json %>,
<%= raw.timestamp[15,2].to_json %>
<% end %> ],
<% end %>
];
(yeah, pretty ugly)

Some error messages; line 20 contains the "if"-conditional
.../app/views/processed_data/_scatter.html.erb:20: syntax error,
unexpected ')', expecting keyword_then or ';' or '\n'
...nd= ( if raw.status == "woke" );@output_buffer.safe_concat('

app/views/processed_data/_scatter.html.erb:23: syntax error, unexpected
keyword_end, expecting ')'
...ffer.safe_concat(' '); end ;@output_buffer.safe_concat(...


Does anyone know how to do this?

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

[Marco Antonio Almeida]

Hi Rynn,

On Mon, Jun 6, 2016 at 12:15 AM Rynn Steinbolt <li...@ruby-forum.com> wrote:

Hi folks!

Im currently trying to generate diagrams with a js lib and rails. It
doesn't work, though, since I can't figure out how to embed ruby code to
supply the diagrams with data. My editor highlights the ruby code
weirdly,
too, with I take as a hint for wrong ruby syntax.
The diagrams work if I use the pure-js sample data, but it REALLY dont
want to input data sets with 200 items by hand.

The snippet in question is this one, it lives in an .html.erb file:

 var hour = [
    <% @raw.each do |raw| %>
    [ <%= if raw.status == "aufgewacht" %>

It seems that your problem is here. You don't want to output the if condition so you should actually have:

<% if raw.status == "aufgewacht" %>

 

        <%= Time.parse(raw.timestamp).wday.to_json  %>,
        <%= raw.timestamp[15,2].to_json %>
      <% end %> ],
    <% end %>
  ];
(yeah, pretty ugly)

Some error messages; line 20 contains the "if"-conditional
.../app/views/processed_data/_scatter.html.erb:20: syntax error,
unexpected ')', expecting keyword_then or ';' or '\n'
...nd= ( if raw.status == "woke" );@output_buffer.safe_concat('

app/views/processed_data/_scatter.html.erb:23: syntax error, unexpected
keyword_end, expecting ')'
...ffer.safe_concat('      '); end ;@output_buffer.safe_concat(...


Does anyone know how to do this?

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[Rynn Steinbolt]

Marco Antonio Almeida wrote in post #1183823:

> Hi Rynn,
>
> On Mon, Jun 6, 2016 at 12:15 AM Rynn Steinbolt <li...@ruby-forum.com>
> wrote:
>
>> The snippet in question is this one, it lives in an .html.erb file:
>>
>> var hour = [
>> <% @raw.each do |raw| %>
>> [ <%= if raw.status == "aufgewacht" %>
>>
>
> It seems that your problem is here. You don't want to output the if
> condition so you should actually have:
>
> <% if raw.status == "aufgewacht" %>

Thank you! That does indeed get rid of the error messages. I wonder how
i missed this.
However, the code still doesnt work - there is no data displayed.

Maybe the syntax highlighting makes it a bit clearer. Compare the two
attached snippets, one with the js/erb code (with a working var hour
below it, to demontrate that the js is (probably) not the problem, and
some reguler embedded ruby without js.

Attachments:
http://www.ruby-forum.com/attachment/11367/Auswahl_004.jpg
http://www.ruby-forum.com/attachment/11368/Auswahl_006.jpg

[Walter Lee Davis]

You may be getting tripped up by the fact that raw() is a view helper method, and you are using it within your block as a local variable. Try a different word, and see if that makes any difference.

Walter

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

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[Rynn Steinbolt]

Walter Davis wrote in post #1183825:
>>>> var hour = [
>> i missed this.

>>
>>
>
> You may be getting tripped up by the fact that raw() is a view helper
> method, and you are using it within your block as a local variable. Try
> a different word, and see if that makes any difference.
>
> Walter

Thanks for your input!

Unfortunately it didnt solve my problem, but I finally figured it out:

I had a newline character appended to my status variable, so raw.status
could never equal "aufgewacht". It does, though, with raw.status.chomp!