ckanext-datasetthumbnail

Generates thumbnails for datasets.

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Project links

Homepage

Project description

This CKAN extension adds support for generation and display of thumbnail images. The helper function thumbnail_url can be called from a template, as in this example:

{% block thumbnail %}
{% set thumbnail = h.thumbnail_url(package.id) %}
{% if  thumbnail %}
    <a href="{{ h.url_for(controller='package', action='read', id=package.name) }}">
    <img class="dataset-list-thumbnail" src="{{ thumbnail }}">
    </a>
{% endif %}
{% endblock %}

If a resource exists with the name thumbnail.png, this will be used.
If no resource exists with this name and the logged-in user has sufficient access, the thumbnail will be generated from the first matching JPEG or PNG resource.
If no thumbnail exists at this point, a placeholder image will be used.

Requirements

CKAN 2.5.2
Pillow 3.2.0 (with PngImagePlugin and JpegImagePlugin)

Installation

To install ckanext-datasetthumbnail:

Activate your CKAN virtual environment, for example:
```
. /usr/lib/ckan/default/bin/activate
```
Install the ckanext-datasetthumbnail Python package into your virtual environment:
```
pip install ckanext-datasetthumbnail
```
Add datasetthumbnail to the ckan.plugins setting in your CKAN config file (by default the config file is located at /etc/ckan/default/production.ini).
Restart CKAN. For example if you’ve deployed CKAN with Apache on Ubuntu:
```
sudo service apache2 reload
```

Config Settings

# Show thumbnails
# (optional, default: False).
ckan.datasetthumbnail.show_thumbnail = True

# Autogenerate thumbnails
# (optional, default: False).
ckan.datasetthumbnail.auto_generate = True

# Generated thumbnail width
# (optional, default: 140).
ckan.datasetthumbnail.thumbnail_width = 140

# Generated thumbnail height
# (optional, default: int(width * 1.415)
ckan.datasetthumbnail.thumbnail_height = 140

Development Installation

To install ckanext-datasetthumbnail for development, activate your CKAN virtualenv and do:

git clone https://github.com/aptivate/ckanext-datasetthumbnail.git
cd ckanext-datasetthumbnail
python setup.py develop
pip install -r dev-requirements.txt

Running the Tests

To run the tests, do:

nosetests --nologcapture --with-pylons=test.ini

To run the tests and produce a coverage report, first make sure you have coverage installed in your virtualenv (pip install coverage) then run:

nosetests --nologcapture --with-pylons=test.ini --with-coverage --cover-package=ckanext.datasetthumbnail --cover-inclusive --cover-erase --cover-tests

Registering ckanext-datasetthumbnail on PyPI

ckanext-datasetthumbnail should be availabe on PyPI as https://pypi-hypernode.com/pypi/ckanext-datasetthumbnail. If that link doesn’t work, then you can register the project on PyPI for the first time by following these steps:

Create a source distribution of the project:
```
python setup.py sdist
```
Register the project:
```
python setup.py register
```
Upload the source distribution to PyPI:
```
python setup.py sdist upload
```
Tag the first release of the project on GitHub with the version number from the setup.py file. For example if the version number in setup.py is 0.0.1 then do:
```
git tag 0.0.1
git push --tags
```

Releasing a New Version of ckanext-datasetthumbnail

ckanext-datasetthumbnail is availabe on PyPI as https://pypi-hypernode.com/pypi/ckanext-datasetthumbnail. To publish a new version to PyPI follow these steps:

Update the version number in the setup.py file. See PEP 440 for how to choose version numbers.
Create a source distribution of the new version:
```
python setup.py sdist
```
Upload the source distribution to PyPI:
```
python setup.py sdist upload
```
Tag the new release of the project on GitHub with the version number from the setup.py file. For example if the version number in setup.py is 0.0.2 then do:
```
git tag 0.0.2
git push --tags
```