Templating

Introduction to the Template Interface

Cement defines a Template Interface, as well as a default DummyTemplateHandler that implements the interface as a placeholder but does not actually do anything.

Cement often includes multiple handler implementations of an interface that may or may not have additional features or functionality than the interface requires. The documentation below only references usage based on the interface and default handler (not the full capabilities of an implementation).

****

Cement Extensions That Provide Template Handlers:

API References:

Configuration

Application Meta Options

The following options under App.Meta modify configuration handling:

Option

Description

template_handler

The handler that implements the template interface.

Working with Templates

The template handler can be used to render content in-line, as well as copy render source directories before copying them to their destination.

Example: Working with Templates
Example: Working with Templates
from cement import App
class MyApp(App):
class Meta:
label = 'myapp'
extensions = ['jinja2']
template_handler = 'jinja2'
with MyApp() as app:
# create a data dictionary for templating
data = {
'foo': 'bar'
}
# render content as template
app.template.render('Foo => {{ foo }}', data)
# render and copy a source directory
src = '/path/to/source/dir'
dst = '/path/to/destination/dir'
app.template.copy(src, dst, data)

When copying a source directory, both the file/directory path names themselves are rendered as templates as well as the contents of files.

Creating a Template Handler

All interfaces in Cement can be overridden with your own implementation. This can be done either by sub-classing TemplateHandler itself, or by sub-classing an existing extension's handlers in order to alter their functionality.

Example: Creating a Template Handler
Example: Creating a Template Handler
myapp.py
from cement import App
from cement.core.template import TemplateHandler
class MyTemplateHandler(TemplateHandler):
class Meta:
label = 'my_template_handler'
# do something to implement the interface
class MyApp(App):
class Meta:
label = 'myapp'
template_handler = 'my_template_handler'
handlers = [
MyTemplateHandler,
]