How to pass a instance html_safe string variable to js.erb

Question

It seems a stupid question, but there are no way to achieve this

With Rails 4.2.5.

in a remote call to the controller,

def update
  # ... save ...
  @notice="S'han trovat errors"
  # automatically renders update.js.erb
end

in update.js.erb

alert('<%=(@notice)%>');

this is the output:

What I've tried:

1)In the controller:

 @notice="S'han trovat errors".html_safe

2)another proof, in js.erb:

  alert('<%=raw(@notice)%>');

In both cases, when javascript function alert() is executed, it hangs without any message in terminal neither in browser console ¿?

3)I have tried too:

alert('<%=escape_javascript(@notice)%>');

But doesn't work, shows "S'han trobat..."

Of course, if I show in index.html.erb, @notice , the result is correct (S'han trobat..)

I don't know how to pass from controller to js.erb a " ' " character in a string instance variable to be shown

Thanks

I've already done, it is one of my proofs, I also have tried `alert('<%=escape_javascript(@notice)%>');` without success — Albert Català, May 25 '16 at 07:16
Have you even looked at the generated code? What's the problem with it in each case? — Niklas B., May 25 '16 at 07:31

score 0 · Answer 1 · answered May 25 '16 at 07:21

0

just remove raw or try add .html_safe in js file not in the controller.

Other solution is to use a \' to escape single quote like

@notice="S\'han trovat errors"

answered May 25 '16 at 07:21

bxorcloud

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I've already removed raw, and it doesn't work, it is one of my proofs, – Albert Català May 25 '16 at 07:25
did you try adding \' to scape single quote? – bxorcloud May 25 '16 at 07:28
If I put in @notice "S\\'han trobat" the result is "S'han trobat" – Albert Català May 25 '16 at 07:30
If I put in @notice "S\'han trobat the result is "S'han trobat" too – Albert Català May 25 '16 at 07:32
try using the #{} instead of <%= %>, maybe it will work because you are in .erb file. just maybe. – bxorcloud May 25 '16 at 07:39
PUFF!!! the problem is that javaScript recives: alert('S'han trobat..') three semicolons character ( ' ) -> catalan newbie mistake!!, sorry – Albert Català May 25 '16 at 07:42
or try this alert('escape(<%=@notice%>)'); – bxorcloud May 25 '16 at 07:42
If I put `alert(escape('<%=(@notice)%>'));` the result is `S%26%2339%3Bhan%20trobat%20errors` – Albert Català May 25 '16 at 07:56

Albert Català · Answer 2 · 2016-05-25T08:02:09.250

The problem is that javascript recives:

alert('S'han trobat errors');

there are 3 '

So the solution is puting in the controller:

@notice="S'han trobat errors".html_safe

and in js.erb:

 alert("<%=(@notice)%>");

Of course, I fell in the quotation marks mistake,

but I still have the question: Why in html.erb files are strings auto-escaped, and they aren't in js.erb? so, why is needed to put .html_safe in the string if I want to show it in js.erb

How to pass a instance html_safe string variable to js.erb

2 Answers2