Re: [Erlangweb-users] Problem with DTL and password field in forms

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On Tue, Feb 23, 2010 at 08:23:42AM +0000, Michal Ptaszek wrote:

> > You're welcome.
> > 
> > I found another issue with DTL. When I use {{ variable }} in a
> > template,
> > and set the value with wpart:fset("variable", "Hello"). Erlydtl
> > doesn't find
> > it.
> > 
...
> 
> Which version of erlydtl are you using?
> 
> The one that is bundled with standard Erlang Web contains a patch
> for erlydtl_runtime: when accessing the request dictionary, the
> key will be first transformed into a string, an if the value is not
> found, the original atom will be used (erlydtl_runtime:18).
> 
Hello,

I am using erlydtl 0.5.3. I do see the code around line 18, but in my
case find_value at line 5 is used or fetch_value at line 38. Both fail.

fetch_value is called by the use of {{ hello }}
     fetch_value(Key, Data) ->
         case find_value(Key, Data) of
             undefined ->
                 throw({undefined_variable, Key});
             Val ->
                 Val
         end.

Key: hello
Data: [{"get",[]},
            {"__https",false},
            {"__ip",{194,79,152,115}},
            {"__cookies",
             [{"eptic_cookie","nonode@nohost-9933714052825178113"}]},
            {"session",[]},
            {"__path",[]},
            {"__cookie_key","nonode@nohost-9933714052825178113"},
            {"__controller",front},
            {"hello","Hello world!"}]

find_value at line 5 is called when using {% if hello %} Hello {% endif %}
     find_value(Key, L) when is_list(L) ->
         proplists:get_value(Key, L);

Key: hello
L: [{"get",[]},
            {"__https",false},
            {"__ip",{194,79,152,115}},
            {"__cookies",
             [{"eptic_cookie","nonode@nohost-9933714052825178113"}]},
            {"session",[]},
            {"__path",[]},
            {"__cookie_key","nonode@nohost-9933714052825178113"},
            {"__controller",front},
            {"hello","Hello world!"}]

Here's the relevant controller code:
index(_Args) ->
    wpart:fset("hello", "Hello world!"),
    {template, "test/index.html"}.

And the template
<html>
<head>
</head>
<body>
<h1> {% if hello %} Hello ! {% endif %}</h1>
</body>
</html>

This is on a fresh install, downloaded with 
hg clone https://bitbucket.org/etc/erlang-web/

Regards