Author: carljm
Date: 2011-09-15 18:16:25 -0700 (Thu, 15 Sep 2011)
New Revision: 16833
Modified:
django/trunk/django/template/debug.py
django/trunk/django/template/defaulttags.py
django/trunk/django/views/debug.py
django/trunk/tests/regressiontests/templates/nodelist.py
django/trunk/tests/regressiontests/templates/tests.py
django/trunk/tests/regressiontests/views/tests/debug.py
Log:
Fixed #16770 -- Eliminated TemplateSyntaxError wrapping of exceptions. Thanks
to Justin Myles-Holmes for report and draft patch.
Exceptions raised in templates were previously wrapped in TemplateSyntaxError
(in TEMPLATE_DEBUG mode only) in order to provide template source details on
the debug 500 page. The same debug information is now provided by annotating
exceptions rather than wrapping them. This makes catching exceptions raised
from templates more sane, as it's consistent in or out of DEBUG, and you can
catch the specific exception(s) you care about rather than having to also catch
TemplateSyntaxError and unwrap it.
Modified: django/trunk/django/template/debug.py
===================================================================
--- django/trunk/django/template/debug.py 2011-09-15 23:55:30 UTC (rev
16832)
+++ django/trunk/django/template/debug.py 2011-09-16 01:16:25 UTC (rev
16833)
@@ -4,6 +4,7 @@
from django.utils.safestring import SafeData, EscapeData
from django.utils.formats import localize
+
class DebugLexer(Lexer):
def __init__(self, template_string, origin):
super(DebugLexer, self).__init__(template_string, origin)
@@ -42,9 +43,9 @@
def error(self, token, msg):
return self.source_error(token.source, msg)
- def source_error(self, source,msg):
+ def source_error(self, source, msg):
e = TemplateSyntaxError(msg)
- e.source = source
+ e.django_template_source = source
return e
def create_nodelist(self):
@@ -63,38 +64,31 @@
raise self.source_error(source, msg)
def compile_function_error(self, token, e):
- if not hasattr(e, 'source'):
- e.source = token.source
+ if not hasattr(e, 'django_template_source'):
+ e.django_template_source = token.source
class DebugNodeList(NodeList):
def render_node(self, node, context):
try:
- result = node.render(context)
- except TemplateSyntaxError, e:
- if not hasattr(e, 'source'):
- e.source = node.source
- raise
+ return node.render(context)
except Exception, e:
- from sys import exc_info
- wrapped = TemplateSyntaxError(u'Caught %s while rendering: %s' %
- (e.__class__.__name__, force_unicode(e, errors='replace')))
- wrapped.source = getattr(e, 'template_node_source', node.source)
- wrapped.exc_info = exc_info()
- raise wrapped, None, wrapped.exc_info[2]
- return result
+ if not hasattr(e, 'django_template_source'):
+ e.django_template_source = node.source
+ raise
+
class DebugVariableNode(VariableNode):
def render(self, context):
try:
output = self.filter_expression.resolve(context)
output = localize(output, use_l10n=context.use_l10n)
output = force_unicode(output)
- except TemplateSyntaxError, e:
- if not hasattr(e, 'source'):
- e.source = self.source
- raise
except UnicodeDecodeError:
return ''
+ except Exception, e:
+ if not hasattr(e, 'django_template_source'):
+ e.django_template_source = self.source
+ raise
if (context.autoescape and not isinstance(output, SafeData)) or
isinstance(output, EscapeData):
return escape(output)
else:
Modified: django/trunk/django/template/defaulttags.py
===================================================================
--- django/trunk/django/template/defaulttags.py 2011-09-15 23:55:30 UTC (rev
16832)
+++ django/trunk/django/template/defaulttags.py 2011-09-16 01:16:25 UTC (rev
16833)
@@ -227,17 +227,15 @@
context.update(unpacked_vars)
else:
context[self.loopvars[0]] = item
- # In TEMPLATE_DEBUG mode providing source of the node which
- # actually raised an exception to DefaultNodeList.render_node
+ # In TEMPLATE_DEBUG mode provide source of the node which
+ # actually raised the exception
if settings.TEMPLATE_DEBUG:
for node in self.nodelist_loop:
try:
nodelist.append(node.render(context))
except Exception, e:
- if not hasattr(e, 'template_node_source'):
- from sys import exc_info
- e.template_node_source = node.source
- raise e, None, exc_info()[2]
+ if not hasattr(e, 'django_template_source'):
+ e.django_template_source = node.source
raise
else:
for node in self.nodelist_loop:
Modified: django/trunk/django/views/debug.py
===================================================================
--- django/trunk/django/views/debug.py 2011-09-15 23:55:30 UTC (rev 16832)
+++ django/trunk/django/views/debug.py 2011-09-16 01:16:25 UTC (rev 16833)
@@ -8,8 +8,7 @@
from django.core.exceptions import ImproperlyConfigured
from django.http import (HttpResponse, HttpResponseServerError,
HttpResponseNotFound, HttpRequest, build_request_repr)
-from django.template import (Template, Context, TemplateDoesNotExist,
- TemplateSyntaxError)
+from django.template import Template, Context, TemplateDoesNotExist
from django.template.defaultfilters import force_escape, pprint
from django.utils.html import escape
from django.utils.importlib import import_module
@@ -223,8 +222,8 @@
'loader': loader_name,
'templates': template_list,
})
- if (settings.TEMPLATE_DEBUG and hasattr(self.exc_value, 'source') and
- isinstance(self.exc_value, TemplateSyntaxError)):
+ if (settings.TEMPLATE_DEBUG and
+ hasattr(self.exc_value, 'django_template_source')):
self.get_template_exception_info()
frames = self.get_traceback_frames()
@@ -268,7 +267,7 @@
return t.render(c)
def get_template_exception_info(self):
- origin, (start, end) = self.exc_value.source
+ origin, (start, end) = self.exc_value.django_template_source
template_source = origin.reload()
context_lines = 10
line = 0
@@ -626,7 +625,7 @@
{% endif %}
{% if template_info %}
<div id="template">
- <h2>Template error</h2>
+ <h2>Error during template rendering</h2>
<p>In template <code>{{ template_info.name }}</code>, error at line
<strong>{{ template_info.line }}</strong></p>
<h3>{{ template_info.message }}</h3>
<table class="source{% if template_info.top %} cut-top{% endif %}{%
ifnotequal template_info.bottom template_info.total %} cut-bottom{%
endifnotequal %}">
Modified: django/trunk/tests/regressiontests/templates/nodelist.py
===================================================================
--- django/trunk/tests/regressiontests/templates/nodelist.py 2011-09-15
23:55:30 UTC (rev 16832)
+++ django/trunk/tests/regressiontests/templates/nodelist.py 2011-09-16
01:16:25 UTC (rev 16833)
@@ -1,7 +1,7 @@
-from django.conf import settings
-from django.template import VariableNode, Context, TemplateSyntaxError
+from django.template import VariableNode, Context
from django.template.loader import get_template_from_string
from django.utils.unittest import TestCase
+from django.test.utils import override_settings
class NodelistTest(TestCase):
@@ -35,13 +35,7 @@
Checks whether index of error is calculated correctly in
template debugger in for loops. Refs ticket #5831
"""
- def setUp(self):
- self.old_template_debug = settings.TEMPLATE_DEBUG
- settings.TEMPLATE_DEBUG = True
-
- def tearDown(self):
- settings.TEMPLATE_DEBUG = self.old_template_debug
-
+ @override_settings(DEBUG=True, TEMPLATE_DEBUG = True)
def test_correct_exception_index(self):
tests = [
('{% load bad_tag %}{% for i in range %}{% badsimpletag %}{%
endfor %}', (38, 56)),
@@ -58,7 +52,7 @@
template = get_template_from_string(source)
try:
template.render(context)
- except TemplateSyntaxError, e:
- error_source_index = e.source[1]
+ except (RuntimeError, TypeError), e:
+ error_source_index = e.django_template_source[1]
self.assertEqual(error_source_index,
expected_error_source_index)
Modified: django/trunk/tests/regressiontests/templates/tests.py
===================================================================
--- django/trunk/tests/regressiontests/templates/tests.py 2011-09-15
23:55:30 UTC (rev 16832)
+++ django/trunk/tests/regressiontests/templates/tests.py 2011-09-16
01:16:25 UTC (rev 16833)
@@ -1,4 +1,6 @@
# -*- coding: utf-8 -*-
+from __future__ import with_statement
+
from django.conf import settings
if __name__ == '__main__':
@@ -20,7 +22,7 @@
from django.template import loader
from django.template.loaders import app_directories, filesystem, cached
from django.test.utils import (get_warnings_state, restore_warnings_state,
- setup_test_template_loader, restore_template_loaders)
+ setup_test_template_loader, restore_template_loaders, override_settings)
from django.utils import unittest
from django.utils.formats import date_format
from django.utils.translation import activate, deactivate, ugettext as _
@@ -309,9 +311,9 @@
r = None
try:
r = tmpl.render(template.Context({}))
- except template.TemplateSyntaxError, e:
+ except template.TemplateDoesNotExist, e:
settings.TEMPLATE_DEBUG = old_td
- self.assertEqual(e.args[0], 'Caught TemplateDoesNotExist while
rendering: missing.html')
+ self.assertEqual(e.args[0], 'missing.html')
self.assertEqual(r, None, 'Template rendering unexpectedly
succeeded, produced: ->%r<-' % r)
finally:
loader.template_source_loaders = old_loaders
@@ -336,8 +338,8 @@
r = None
try:
r = tmpl.render(template.Context({}))
- except template.TemplateSyntaxError, e:
- self.assertEqual(e.args[0], 'Caught TemplateDoesNotExist while
rendering: missing.html')
+ except template.TemplateDoesNotExist, e:
+ self.assertEqual(e.args[0], 'missing.html')
self.assertEqual(r, None, 'Template rendering unexpectedly
succeeded, produced: ->%r<-' % r)
# For the cached loader, repeat the test, to ensure the first
attempt did not cache a
@@ -345,8 +347,8 @@
tmpl = loader.get_template(load_name)
try:
tmpl.render(template.Context({}))
- except template.TemplateSyntaxError, e:
- self.assertEqual(e.args[0], 'Caught TemplateDoesNotExist while
rendering: missing.html')
+ except template.TemplateDoesNotExist, e:
+ self.assertEqual(e.args[0], 'missing.html')
self.assertEqual(r, None, 'Template rendering unexpectedly
succeeded, produced: ->%r<-' % r)
finally:
loader.template_source_loaders = old_loaders
@@ -358,28 +360,32 @@
split = token.split_contents()
self.assertEqual(split, ["sometag", '_("Page not found")',
'value|yesno:_("yes,no")'])
+ @override_settings(SETTINGS_MODULE=None, TEMPLATE_DEBUG=True)
def test_url_reverse_no_settings_module(self):
# Regression test for #9005
- from django.template import Template, Context, TemplateSyntaxError
+ from django.template import Template, Context
- old_settings_module = settings.SETTINGS_MODULE
- old_template_debug = settings.TEMPLATE_DEBUG
-
- settings.SETTINGS_MODULE = None
- settings.TEMPLATE_DEBUG = True
-
t = Template('{% url will_not_match %}')
c = Context()
- try:
- rendered = t.render(c)
- except TemplateSyntaxError, e:
- # Assert that we are getting the template syntax error and not the
- # string encoding error.
- self.assertEqual(e.args[0], "Caught NoReverseMatch while
rendering: Reverse for 'will_not_match' with arguments '()' and keyword
arguments '{}' not found.")
+ with self.assertRaises(urlresolvers.NoReverseMatch):
+ t.render(c)
- settings.SETTINGS_MODULE = old_settings_module
- settings.TEMPLATE_DEBUG = old_template_debug
+ @override_settings(DEBUG=True, TEMPLATE_DEBUG = True)
+ def test_no_wrapped_exception(self):
+ """
+ The template system doesn't wrap exceptions, but annotates them.
+ Refs #16770
+
+ """
+ c = Context({"coconuts": lambda: 42 / 0})
+ t = Template("{{ coconuts }}")
+ with self.assertRaises(ZeroDivisionError) as cm:
+ t.render(c)
+
+ self.assertEqual(cm.exception.django_template_source[1], (0, 14))
+
+
def test_invalid_block_suggestion(self):
# See #7876
from django.template import Template, TemplateSyntaxError
@@ -666,7 +672,7 @@
# In methods that raise an exception without a
# "silent_variable_attribute" set to True, the exception propagates
- 'filter-syntax14': (r'1{{ var.method4 }}2', {"var": SomeClass()},
(SomeOtherException, SomeOtherException, template.TemplateSyntaxError)),
+ 'filter-syntax14': (r'1{{ var.method4 }}2', {"var": SomeClass()},
(SomeOtherException, SomeOtherException)),
# Escaped backslash in argument
'filter-syntax15': (r'{{ var|default_if_none:"foo\bar" }}',
{"var": None}, r'foo\bar'),
@@ -695,8 +701,8 @@
# In attribute and dict lookups that raise an unexpected exception
# without a "silent_variable_attribute" set to True, the exception
# propagates
- 'filter-syntax23': (r'1{{ var.noisy_fail_key }}2', {"var":
SomeClass()}, (SomeOtherException, SomeOtherException,
template.TemplateSyntaxError)),
- 'filter-syntax24': (r'1{{ var.noisy_fail_attribute }}2', {"var":
SomeClass()}, (SomeOtherException, SomeOtherException,
template.TemplateSyntaxError)),
+ 'filter-syntax23': (r'1{{ var.noisy_fail_key }}2', {"var":
SomeClass()}, (SomeOtherException, SomeOtherException)),
+ 'filter-syntax24': (r'1{{ var.noisy_fail_attribute }}2', {"var":
SomeClass()}, (SomeOtherException, SomeOtherException)),
### COMMENT SYNTAX
########################################################
'comment-syntax01': ("{# this is hidden #}hello", {}, "hello"),
@@ -753,7 +759,7 @@
### EXCEPTIONS
############################################################
# Raise exception for invalid template name
- 'exception01': ("{% extends 'nonexistent' %}", {},
(template.TemplateDoesNotExist, template.TemplateDoesNotExist,
template.TemplateSyntaxError)),
+ 'exception01': ("{% extends 'nonexistent' %}", {},
(template.TemplateDoesNotExist, template.TemplateDoesNotExist)),
# Raise exception for invalid template name (in variable)
'exception02': ("{% extends nonexistent %}", {},
(template.TemplateSyntaxError, template.TemplateDoesNotExist)),
@@ -1050,7 +1056,7 @@
'include-fail2': ('{% load broken_tag %}', {},
template.TemplateSyntaxError),
'include-error07': ('{% include "include-fail1" %}', {}, ('', '',
RuntimeError)),
'include-error08': ('{% include "include-fail2" %}', {}, ('', '',
template.TemplateSyntaxError)),
- 'include-error09': ('{% include failed_include %}',
{'failed_include': 'include-fail1'}, ('', '', template.TemplateSyntaxError)),
+ 'include-error09': ('{% include failed_include %}',
{'failed_include': 'include-fail1'}, ('', '', RuntimeError)),
'include-error10': ('{% include failed_include %}',
{'failed_include': 'include-fail2'}, ('', '', template.TemplateSyntaxError)),
@@ -1481,8 +1487,8 @@
# Failures
'old-url-fail01': ('{% url %}', {}, template.TemplateSyntaxError),
- 'old-url-fail02': ('{% url no_such_view %}', {},
(urlresolvers.NoReverseMatch, urlresolvers.NoReverseMatch,
template.TemplateSyntaxError)),
- 'old-url-fail03': ('{% url regressiontests.templates.views.client
%}', {}, (urlresolvers.NoReverseMatch, urlresolvers.NoReverseMatch,
template.TemplateSyntaxError)),
+ 'old-url-fail02': ('{% url no_such_view %}', {},
(urlresolvers.NoReverseMatch, urlresolvers.NoReverseMatch)),
+ 'old-url-fail03': ('{% url regressiontests.templates.views.client
%}', {}, (urlresolvers.NoReverseMatch, urlresolvers.NoReverseMatch)),
'old-url-fail04': ('{% url view id, %}', {},
template.TemplateSyntaxError),
'old-url-fail05': ('{% url view id= %}', {},
template.TemplateSyntaxError),
'old-url-fail06': ('{% url view a.id=id %}', {},
template.TemplateSyntaxError),
@@ -1522,8 +1528,8 @@
# Failures
'url-fail01': ('{% load url from future %}{% url %}', {},
template.TemplateSyntaxError),
- 'url-fail02': ('{% load url from future %}{% url "no_such_view"
%}', {}, (urlresolvers.NoReverseMatch, urlresolvers.NoReverseMatch,
template.TemplateSyntaxError)),
- 'url-fail03': ('{% load url from future %}{% url
"regressiontests.templates.views.client" %}', {}, (urlresolvers.NoReverseMatch,
urlresolvers.NoReverseMatch, template.TemplateSyntaxError)),
+ 'url-fail02': ('{% load url from future %}{% url "no_such_view"
%}', {}, (urlresolvers.NoReverseMatch, urlresolvers.NoReverseMatch)),
+ 'url-fail03': ('{% load url from future %}{% url
"regressiontests.templates.views.client" %}', {}, (urlresolvers.NoReverseMatch,
urlresolvers.NoReverseMatch)),
'url-fail04': ('{% load url from future %}{% url "view" id, %}',
{}, template.TemplateSyntaxError),
'url-fail05': ('{% load url from future %}{% url "view" id= %}',
{}, template.TemplateSyntaxError),
'url-fail06': ('{% load url from future %}{% url "view" a.id=id
%}', {}, template.TemplateSyntaxError),
@@ -1531,9 +1537,9 @@
'url-fail08': ('{% load url from future %}{% url "view"
id="unterminatedstring %}', {}, template.TemplateSyntaxError),
'url-fail09': ('{% load url from future %}{% url "view" id=", %}',
{}, template.TemplateSyntaxError),
- 'url-fail11': ('{% load url from future %}{% url named_url %}',
{}, (urlresolvers.NoReverseMatch, urlresolvers.NoReverseMatch,
template.TemplateSyntaxError)),
- 'url-fail12': ('{% load url from future %}{% url named_url %}',
{'named_url': 'no_such_view'}, (urlresolvers.NoReverseMatch,
urlresolvers.NoReverseMatch, template.TemplateSyntaxError)),
- 'url-fail13': ('{% load url from future %}{% url named_url %}',
{'named_url': 'regressiontests.templates.views.client'},
(urlresolvers.NoReverseMatch, urlresolvers.NoReverseMatch,
template.TemplateSyntaxError)),
+ 'url-fail11': ('{% load url from future %}{% url named_url %}',
{}, (urlresolvers.NoReverseMatch, urlresolvers.NoReverseMatch)),
+ 'url-fail12': ('{% load url from future %}{% url named_url %}',
{'named_url': 'no_such_view'}, (urlresolvers.NoReverseMatch,
urlresolvers.NoReverseMatch)),
+ 'url-fail13': ('{% load url from future %}{% url named_url %}',
{'named_url': 'regressiontests.templates.views.client'},
(urlresolvers.NoReverseMatch, urlresolvers.NoReverseMatch)),
'url-fail14': ('{% load url from future %}{% url named_url id,
%}', {'named_url': 'view'}, template.TemplateSyntaxError),
'url-fail15': ('{% load url from future %}{% url named_url id=
%}', {'named_url': 'view'}, template.TemplateSyntaxError),
'url-fail16': ('{% load url from future %}{% url named_url a.id=id
%}', {'named_url': 'view'}, template.TemplateSyntaxError),
Modified: django/trunk/tests/regressiontests/views/tests/debug.py
===================================================================
--- django/trunk/tests/regressiontests/views/tests/debug.py 2011-09-15
23:55:30 UTC (rev 16832)
+++ django/trunk/tests/regressiontests/views/tests/debug.py 2011-09-16
01:16:25 UTC (rev 16833)
@@ -75,7 +75,7 @@
for n in range(len(except_args)):
try:
self.client.get(reverse('template_exception', args=(n,)))
- except TemplateSyntaxError, e:
+ except Exception:
raising_loc = inspect.trace()[-1][-2][0].strip()
self.assertFalse(raising_loc.find('raise BrokenException') ==
-1,
"Failed to find 'raise BrokenException' in last frame of
traceback, instead found: %s" %
--
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