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I'm using a Django-Compressor Filter as part of Wagtail (Django variant CMS with super cool UI). Environment is Wagtail 0.2 + Python 2.7 + Django 1.6 + Virtualenv + FastCGI + Apache shared hosting.
Issue occurs when trying to access admin/login page of the CMS. Django shows an Error rendering template
Error during template rendering
In template /home/username/env/lib/python2.7/site-packages/wagtail/wagtailadmin/templates/wagtailadmin/skeleton.html, error at line 20
/bin/sh: django_libsass.SassCompiler: command not found
Line 20 of the skeleton.html is:
<!doctype html>
{% load compress %}
<!--[if lt IE 7]> <html class="no-js lt-ie9 lt-ie8 lt-ie7" lang="{{ LANGUAGE_CODE|default:"en-gb" }}"> <![endif]-->
<!--[if IE 7]> <html class="no-js lt-ie9 lt-ie8" lang="{{ LANGUAGE_CODE|default:"en-gb" }}"> <![endif]-->
<!--[if IE 8]> <html class="no-js lt-ie9" lang="{{ LANGUAGE_CODE|default:"en-gb" }}"> <![endif]-->
<!--[if gt IE 8]><!--> <html class="no-js" lang="{{ LANGUAGE_CODE|default:"en-gb" }}"> <!--<![endif]-->
<title>Wagtail - {% block titletag %}{% endblock %}</title>
<meta name="description" content="" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<script src="//cdnjs.cloudflare.com/ajax/libs/modernizr/2.6.2/modernizr.min.js"></script>
{% block css %}{# Block defined for timing breakdowns in django debug toolbar - not expected to be overridden #}
<link rel="stylesheet" href="//fonts.googleapis.com/css?family=Open+Sans:300,400,600,700" />
<link rel="stylesheet" href="//fonts.googleapis.com/css?family=Bitter:400,700" />
19
20 {% compress css %}
21 <link rel="stylesheet" href="{{ STATIC_URL }}wagtailadmin/scss/normalize.css" />
<link rel="stylesheet" href="{{ STATIC_URL }}wagtailadmin/scss/vendor/jquery-ui/jquery-ui-1.10.3.verdant.css" />
<link rel="stylesheet" href="{{ STATIC_URL }}wagtailadmin/scss/vendor/jquery.timepicker.css" />
<link rel="stylesheet" href="{{ STATIC_URL }}wagtailadmin/scss/core.scss" type="text/x-scss" />
{% endcompress %}
{% block extra_css %}{% endblock %}
{% endblock %}
</head>
<body class="{% block bodyclass %}{% endblock %} {% if messages %}has-messages{% endif %}">
the precompiler in my settings.py, DEBUG is set to True:
COMPRESS_ENABLED = True
COMPRESS_PRECOMPILERS = (
('text/x-scss', 'django_libsass.SassCompiler'),
)
TRIAL AND ERROR #1
I've tried changing to:
('text/x-scss', '/home/username/env/lib/python2.7/site-packages/django_libsass {infile} {outfile}')
but that leads me to a dictionary update sequence element #0 error.
I have django_libsass & compressor installed, also tried pip install libsass, ngm install lessc, pip install sass, turning DEBUG = False, adding COMPRESSOR_OFFLINE, adding COMPRESSOR_ENABLED as suggested in other similar questions. Running manage.py compress returns the same error.
Have rechecked and site-packages and django_libsass are indeed on my sys.path
SassCompiler can be found in ~/env/lib/python2.7/site-packages/django_libsass.py
TRIAL AND ERROR #2
Re-checked that sass is installed and on my path.
Change code to:
COMPRESS_PRECOMPILERS = (
('text/x-scss', 'sass --scss {infile} {outfile}'),
)
Returns error:
Exception Type: FilterError
Exception Value:
/bin/sh: sass: command not found
TRIAL AND ERROR #3
After reading this feedly issue, tried pip install compass to no effect
TRIAL AND ERROR #4
Following gasman's comment, I ran python manage.py shell and tried to import SassCompiler It works with no errors.
Python 2.7.6 (default, Nov 11 2013, 18:34:29)
[GCC 4.4.7 20120313 (Red Hat 4.4.7-3)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
(InteractiveConsole)
>>> from django_libsass import SassCompiler
>>>
Full Traceback
I do apologize if this question is getting too long.
Traceback:
File "/home/username/env/lib/python2.7/site-packages/django/core/handlers/base.py" in get_response
139. response = response.render()
File "/home/username/env/lib/python2.7/site-packages/django/template/response.py" in render
105. self.content = self.rendered_content
File "/home/username/env/lib/python2.7/site-packages/django/template/response.py" in rendered_content
82. content = template.render(context)
File "/home/username/env/lib/python2.7/site-packages/django/template/base.py" in render
140. return self._render(context)
File "/home/username/env/lib/python2.7/site-packages/django/template/base.py" in _render
134. return self.nodelist.render(context)
File "/home/username/env/lib/python2.7/site-packages/django/template/base.py" in render
840. bit = self.render_node(node, context)
File "/home/username/env/lib/python2.7/site-packages/django/template/debug.py" in render_node
78. return node.render(context)
File "/home/username/env/lib/python2.7/site-packages/django/template/loader_tags.py" in render
123. return compiled_parent._render(context)
File "/home/username/env/lib/python2.7/site-packages/django/template/base.py" in _render
134. return self.nodelist.render(context)
File "/home/username/env/lib/python2.7/site-packages/django/template/base.py" in render
840. bit = self.render_node(node, context)
File "/home/username/env/lib/python2.7/site-packages/django/template/debug.py" in render_node
78. return node.render(context)
File "/home/username/env/lib/python2.7/site-packages/django/template/loader_tags.py" in render
62. result = block.nodelist.render(context)
File "/home/username/env/lib/python2.7/site-packages/django/template/base.py" in render
840. bit = self.render_node(node, context)
File "/home/username/env/lib/python2.7/site-packages/django/template/debug.py" in render_node
78. return node.render(context)
File "/home/username/env/lib/python2.7/site-packages/compressor/templatetags/compress.py" in render
147. return self.render_compressed(context, self.kind, self.mode, forced=forced)
File "/home/username/env/lib/python2.7/site-packages/compressor/templatetags/compress.py" in render_compressed
107. rendered_output = self.render_output(compressor, mode, forced=forced)
File "/home/username/env/lib/python2.7/site-packages/compressor/templatetags/compress.py" in render_output
119. return compressor.output(mode, forced=forced)
File "/home/username/env/lib/python2.7/site-packages/compressor/css.py" in output
51. ret.append(subnode.output(*args, **kwargs))
File "/home/username/env/lib/python2.7/site-packages/compressor/css.py" in output
53. return super(CssCompressor, self).output(*args, **kwargs)
File "/home/username/env/lib/python2.7/site-packages/compressor/base.py" in output
246. content = self.filter_input(forced)
File "/home/username/env/lib/python2.7/site-packages/compressor/base.py" in filter_input
194. for hunk in self.hunks(forced):
File "/home/username/env/lib/python2.7/site-packages/compressor/base.py" in hunks
169. precompiled, value = self.precompile(value, **options)
File "/home/username/env/lib/python2.7/site-packages/compressor/base.py" in precompile
226. **kwargs)
File "/home/username/env/lib/python2.7/site-packages/django_libsass.py" in input
51. return compile(filename=self.filename)
File "/home/username/env/lib/python2.7/site-packages/django_libsass.py" in compile
41. return sass.compile(**kwargs)
Exception Type: AttributeError at /admin/login/
Exception Value: 'module' object has no attribute 'compile'
660
(Reposting my comments as an answer, as requested...)
The original error: django_libsass.SassCompiler: command not found
meant that it was failing to import the django-libsass library. (django-compressor responded to that failure by trying to treat it as a shell command instead - django_libsass is not a runnable command, so this failed too, giving the actual error seen here.) The solution is to ensure that django-libsass is installed - it should show up in the output of pip freeze.
The second error: 'module' object has no attribute 'compile'
meant that there was another package installed which defined a module called sass, and this was being loaded in place of the one we wanted, from the libsass package. The solution is to uninstall all sass-related packages apart from django-libsass and libsass.
177
I had the same problem my Python-Django project and rvm. The problem is that the compress precompiler does not know which rvm to use. Solution is to add the ruby path to environ and tell the precompiler where to find sass in the settings.py file:
Like in my case (just do which sass to find the path):
environ['PATH'] = '/Users/username/.rvm/gems/ruby-2.1.5/bin:/Users/username/.rvm/gems/ruby-2.1.5@global/bin:/Users/username/.rvm/rubies/ruby-2.1.5/bin:Users/username/bin'
COMPRESS_PRECOMPILERS = (
('text/x-scss', '/Users/username/.rvm/gems/ruby-2.1.5/bin/sass --scss --trace {infile} {outfile}'),
)
Hope that this helps someone.
40
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