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This CKAN Extension demonstrates some common patterns for customising a CKAN instance. |
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It comprises: |
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rgrp
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* A CKAN Extension "plugin" at ``ckanext/example/plugin.py`` which, when |
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loaded, overrides various settings in the core ``ini``-file to provide: |
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rgrp
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* A path to local customisations of the core templates and stylesheets |
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* A "stream filter" that replaces arbitrary strings in rendered templates |
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* A "route" to override and extend the default behaviour of a core CKAN page |
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* A custom Pylons controller for overriding some core CKAN behaviour |
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* A custom Package edit form |
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* Some simple template customisations |
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Seb Bacon
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Installation |
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============ |
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To install this package, from your CKAN virtualenv, run the following from your CKAN base folder (e.g. ``pyenv/``):: |
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rgrp
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pip install -e git+https://github.com/okfn/ckanext-example#egg=ckanext-example |
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Seb Bacon
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rgrp
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Then activate it by setting ``ckan.plugins = example`` in your main ``ini``-file. |
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Seb Bacon
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Orientation |
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=========== |
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rgrp
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* Examine the source code, starting with ``ckanext/example/plugin.py`` |
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Seb Bacon
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* To understand the nuts and bolts of this file, which is a CKAN |
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*Extension*, read in conjunction with the "Extension |
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documentation":http://packages.python.org/ckan/plugins.html |
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* One thing the extension does is set the values of |
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``extra_public_paths`` and ``extra_template_paths`` in the CKAN |
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config, which are "documented |
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here":http://packages.python.org/ckan/configuration.html#extra-template-paths |
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* These are set to point at directories within |
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rgrp
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`ckanext/example/theme/`` (in this package). Here, we override |
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Seb Bacon
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the home page, provide some extra style with an ``extra.css``, and |
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customise the navigation and header of the main template in the file ``layout.html``. |
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The latter file is a great place to make global theme alterations. |
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It uses the _layout template_ pattern "described in the Genshi |
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documentation":http://genshi.edgewall.org/wiki/GenshiTutorial#AddingaLayoutTemplate. |
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This allows you to use Xpath selectors to override snippets of HTML |
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globally. |
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* The custom package edit form at ``package_form.py`` follows the |
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conventions in the "main CKAN |
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documentation":http://packages.python.org/ckan/forms.html |
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