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58 lines
1.8 KiB
ReStructuredText
58 lines
1.8 KiB
ReStructuredText
Add a Breadcrumb Subscriber to a Pyramid project using 4 simple steps
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#####################################################################
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:date: 2011-07-02 17:25
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:author: Russell Ballestrini
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:tags: Code, Guide, Python
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:slug: add-a-breadcrumb-subscriber-to-a-pyramid-project-using-4-simple-steps
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:status: published
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:summary:
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**Note:** This post shows an old way to modify the request object.
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I discuss a new way in my `Pyramid add_request_method </register-super-powers-with-pyramid-add-request-method/>`_ post.
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This article will explain how to add a breadcrumb subscriber to a
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Pyramid project using 4 simple steps.
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While programming https://school.yohdah.com/ I needed the ability to easily create
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breadcrumb links from the current url. You may view the `bread.py source
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code
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here <https://bitbucket.org/russellballestrini/bread/src/tip/bread.py>`__.
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The following guide describes the process I took to add this
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functionality.
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1. Download and include
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`bread.py <https://bitbucket.org/russellballestrini/bread/raw/tip/bread.py>`__
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at the top of your Pyramid project's \_\_init\_\_.py file:
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::
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from yourproject.bread import Bread
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from pyramid.events import subscriber, NewRequest
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2. At the bottom of the projects \_\_init\_\_.py file create the
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following subscriber function as follows:
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::
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def bread_subscriber( event ):
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""" Build Bread object and add to request """
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event.request.bread = Bread( event.request.url )
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3. Now we can add our new subscriber to our Pyramid config inside
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main and above the routes:
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::
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config.add_subscriber(bread_subscriber, NewRequest)
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4. You are done! Now you should have the ability to use the bread
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object from your template. Below I have provided a mako template
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snippet:
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::
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% for link in request.bread.links:
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${ link | n } /
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% endfor
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.. contents::
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