ckanext-relation

This extension provides an UI for creating, deleting and viewing relationships between datasets.

In this implementation which is specifically designed for the requirements of HEF, TUM.

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Requirements

This extension is tested with CKAN 2.8.0. You may have problem with the deleting if you use this version. You may need to upgrade / update the delete function to purge all deleted datasets. Have a look at this: https://github.com/ckan/ckan/blob/ckan-2.8.0/ckan/controllers/package.py#L1024

Here is the correct code:

 def delete(self, id):

        if 'cancel' in request.params:
            h.redirect_to(controller='package', action='edit', id=id)

        context = {'model': model, 'session': model.Session,
                   'user': c.user, 'auth_user_obj': c.userobj}

        try:
            if request.method == 'POST':
				# Newly added block to delete the relationship if there exists
                # It only includes three types of relationship 
				for rel in ['depends_on', 'links_to', 'child_of']: 
					print('test:'+ rel)
					rel_exist = []
					try:
						rel_exist = get_action('package_relationships_list')(data_dict={'id': id, 'rel':rel})
						print('done with action')
						print(rel_exist)
						if len(rel_exist)!=0:
							print(rel, 'exists')
							for ds in rel_exist:
								data_dict={"subject": id, "object": ds['object'], "type": rel}								
								get_action('package_relationship_delete')({}, data_dict)
								print('hier ist ds:')
					except:
						pass
                ####### till here############
				get_action('package_delete')(context, {'id': id})             
				h.flash_notice(_('Dataset has been deleted.'))
				h.redirect_to(controller='package', action='search')							
            c.pkg_dict = get_action('package_show')(context, {'id': id})
            dataset_type = c.pkg_dict['type'] or 'dataset'
        except NotAuthorized:
            abort(403, _('Unauthorized to delete package %s') % '')
        except NotFound:
            abort(404, _('Dataset not found'))
        return render('package/confirm_delete.html',
                      extra_vars={'dataset_type': dataset_type})

The javascript is also directly included in the main.min.js and not in this ckanext. Here is the Javascript code used for this extension:

$(document).ready(function() {
    $(".glyphicon").click(function() {
        $(this).toggleClass("glyphicon-chevron-down").toggleClass("glyphicon-chevron-up")
    })
});

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Installation

To install ckanext-relation:

1. Activate your CKAN virtual environment, for example::

   . /usr/lib/ckan/default/bin/activate
   

2. Install the ckanext-relation Python package into your virtual environment::

   pip install -e 'git+https://github.com/MandanaMoshref/ckanext-relation.git#egg=ckanext-relation'
   

3. Add relation to the ckan.plugins setting in your CKAN config file (by default the config file is located at /etc/ckan/default/production.ini).

4. Restart CKAN. For example if you've deployed CKAN with Apache on Ubuntu::

   sudo service apache2 reload
   

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Config settings

None at present

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Developer installation

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

git clone https://github.com/MandanaMoshref/ckanext-relation.git
cd ckanext-relation
python setup.py develop

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License

The ckanext-relation is available as free and open source and is licensed under the Apache License, Version 2.0.