templates: pass request in context whenever it's available (#21137)

tests/templates/qommon/forms/widgets/select--test.html

@@ -0,0 +1,14 @@
+{% extends "qommon/forms/widget.html" %}
+{% load qommon %}
+{% block widget-control %}
+<!-- TEST TEMPLATE -->
+<!-- backoffice: {{ request.quixote_request.is_in_backoffice|pprint }} -->
+<select id="form_{{widget.name}}" name="{{widget.name}}"
+    {% for attr in widget.attrs.items %}{{attr.0}}="{{attr.1}}"{% endfor %}>
+  <option value="">---</option>
+  {% for option in widget.get_options %}
+    <option{% for attr in option.attrs.items %} {{attr.0}}="{{attr.1}}"{% endfor %}
+      >{{ option.description }}</option>
+  {% endfor %}
+</select>
+{% endblock %}

tests/test_form_pages.py

@@ -3914,3 +3914,21 @@ def test_resubmit(pub):
     resp = resp.click('new draft')
     resp = resp.follow()
     assert resp.forms[1]['f2'].value == 'XXX'
+
+def test_form_custom_select_template(pub):
+    formdef = create_formdef()
+    formdef.fields = [
+            fields.ItemField(id='1', label='select', type='item',
+                required=True,
+                varname='foo', items=['Foo', 'Bar', 'Baz'])]
+    formdef.store()
+    formdef.data_class().wipe()
+    resp = get_app(pub).get('/test/')
+    assert not 'TEST TEMPLATE' in resp.body
+    formdef.fields[0].extra_css_class = 'template-test'
+    formdef.store()
+
+    resp = get_app(pub).get('/test/')
+    assert 'TEST TEMPLATE' in resp.body
+    # make sure request is available in context
+    assert '<!-- backoffice: False -->' in resp.body

tests/utilities.py

@@ -94,6 +94,8 @@ def create_temporary_pub(sql_mode=False):
         return pub
 
     os.mkdir(pub.app_dir)
+    os.symlink(os.path.join(os.path.dirname(__file__), 'templates'),
+            os.path.join(pub.app_dir, 'templates'))
     fd = file(os.path.join(pub.app_dir, 'site-options.cfg'), 'w')
     fd.write('[wscall-secrets]\n')
     fd.write('idp.example.net = BAR\n')

wcs/qommon/template.py

@@ -415,7 +415,8 @@ def decorate(body, response):
 
 
 def render(template_name, context):
-    return htmltext(render_to_string(template_name, context).encode('utf-8'))
+    request = getattr(get_request(), 'django_request', None)
+    return htmltext(render_to_string(template_name, context, request=request).encode('utf-8'))
 
 
 class TemplateError(Exception):

wcs/settings.py

@@ -94,6 +94,7 @@ TEMPLATES = [
                 "django.template.context_processors.debug",
                 "django.template.context_processors.i18n",
                 "django.template.context_processors.media",
+                "django.template.context_processors.request",
                 "django.template.context_processors.static",
                 "django.template.context_processors.tz",
                 "django.contrib.messages.context_processors.messages",