Structured metadata extension
by Lucia Espona Pernas

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target https://coveralls.io/r/espona/ckanext-composite

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ckanext-composite

Allows to store structured dataset metadata, single or multiple fields. Only one level of subfields is possible. The subfields can be basic text, date type o choice dropboxes. Do not use dashes or numbers in the labels or values of fields.

Requirements

Developed for CKAn version 2.5.2. Requires the extensions ckanext-scheming and ckanext-repeating (using version from repository eawag-rdm).

Installation

To install ckanext-composite:

  1. Install the ckan extensions ckanext-scheming and ckanext-composite
  2. Activate your CKAN virtual environment, for example:

    . /usr/lib/ckan/default/bin/activate
    
  3. Install the ckanext-composite Python package into your virtual environment:

    pip install ckanext-composite
    
  4. Add composite to the ckan.plugins setting in your CKAN config file (by default the config file is located at /etc/ckan/default/production.ini).
  5. Restart CKAN. For example if you’ve deployed CKAN with Apache on Ubuntu:

    sudo service apache2 reload
    

Config Settings

Additional config settings:

scheming.presets = ckanext.scheming:presets.json
                   ckanext.repeating:presets.json
                   ckanext.composite:presets.json

Add this to your schema.json file:

# Composite Field
{
 "field_name": "maintainer",
 "label": "Maintainer",
 "preset": "composite",
 "subfields":[
     {
       "field_name": "name",
       "label": "Name",
       "form_placeholder": "Joe Bloggs"
     },
     {
       "field_name": "email",
       "label": "Email",
       "form_placeholder": "joe@example.com"
      },
     {
       "field_name": "date",
       "label": "Date",
       "preset": "date",
       "form_placeholder": "yyyy-mm-mm"
      },
      {
       "field_name": "identifier_scheme",
       "label": "Scheme",
       "preset": "select",
       "choices": [
         {
           "value": "orcid",
           "label": "ORCID"
         },
         {
           "value": "isni",
           "label": "ISNI"
         }
      ]
    }
 ]
}
# Composite Repeating Field
{
 "field_name": "author",
 "label": "Authors",
 "preset": "composite_repeating",
 "form_blanks": 1,
 "subfields": [
     {
       "field_name": "name",
       "label": "Name",
       "form_placeholder":"eg. John Smith"
     },
     {
       "field_name": "type",
       "label": "Type",
       choices = [
        {
           "value": "collaborator",
           "label": "Collaborator"
         },
         {
           "value": "editor",
           "label": "Editor"
         }
       ]
     }
  ]
 }

Development Installation

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

git clone https://github.com/espona/ckanext-composite.git
cd ckanext-composite
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.composite --cover-inclusive --cover-erase --cover-tests

———————————Registering ckanext-composite on PyPI ———————————

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

  1. Create a source distribution of the project:

    python setup.py sdist
    
  2. Register the project:

    python setup.py register
    
  3. Upload the source distribution to PyPI:

    python setup.py sdist upload
    
  4. 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-composite —————————————-

ckanext-composite is availabe on PyPI as https://pypi.python.org/pypi/ckanext-composite. To publish a new version to PyPI follow these steps:

  1. Update the version number in the setup.py file. See PEP 440 for how to choose version numbers.
  2. Create a source distribution of the new version:

    python setup.py sdist
    
  3. Upload the source distribution to PyPI:

    python setup.py sdist upload
    
  4. 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
    

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