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from django.template import loader
from django.template.backends.django import Template as DjangoTemplate
try:
from django.template.backends.jinja2 import Template as Jinja2Template
except ImportError:
# Most likely Jinja2 isn't installed, in that case just create a class since
# we always want it to be false anyway.
class Jinja2Template:
pass
from render_block.django import django_render_block
from render_block.exceptions import UnsupportedEngine
def render_block_to_string(template_name, block_name, context=None, request=None):
"""
Loads the given template_name and renders the given block with the given
dictionary as context. Returns a string.
template_name
The name of the template to load and render. If it's a list of
template names, Django uses select_template() instead of
get_template() to find the template.
"""
# Like render_to_string, template_name can be a string or a list/tuple.
if isinstance(template_name, (tuple, list)):
t = loader.select_template(template_name)
else:
t = loader.get_template(template_name)
# Create the context instance.
context = context or {}
# The Django backend.
if isinstance(t, DjangoTemplate):
return django_render_block(t, block_name, context, request)
elif isinstance(t, Jinja2Template):
from render_block.jinja2 import jinja2_render_block
return jinja2_render_block(t, block_name, context)
else:
raise UnsupportedEngine(
'Can only render blocks from the Django template backend.')
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