Fix a bug in the dataset form
Fix a bug in the dataset form

file:a/README.rst -> file:b/README.rst
--- a/README.rst
+++ b/README.rst
@@ -31,7 +31,6 @@
 
 Then activate it by setting ``ckan.plugins = example`` in your main ``ini``-file.
 
-
 Orientation
 ===========
 
@@ -63,4 +62,19 @@
   updating. In the meantime, follow the instructions at: 
   http://readthedocs.org/docs/ckan/en/latest/forms.html
 
+Example Tags With Vocabularies
+==============================
 
+To add example tag vocabulary data to the database, from the ckanext-example directory run:
+
+::
+
+    paster example create-example-vocabs -c <path to your ckan config file>
+
+This data can be removed with
+
+::
+
+    paster example clean -c <path to your ckan config file>
+
+

--- /dev/null
+++ b/ckanext/example/commands.py
@@ -1,1 +1,83 @@
+from ckan import model
+from ckan.lib.cli import CkanCommand
+from ckan.logic import get_action, NotFound
+import forms
 
+import logging
+log = logging.getLogger()
+
+
+class ExampleCommand(CkanCommand):
+    '''
+    CKAN Example Extension
+
+    Usage::
+
+        paster example create-example-vocabs -c <path to config file>
+
+        paster example clean -c <path to config file>
+            - Remove all data created by ckanext-example
+
+    The commands should be run from the ckanext-example directory.
+    '''
+    summary = __doc__.split('\n')[0]
+    usage = __doc__
+
+    def command(self):
+        '''
+        Parse command line arguments and call appropriate method.
+        '''
+        if not self.args or self.args[0] in ['--help', '-h', 'help']:
+            print ExampleCommand.__doc__
+            return
+
+        cmd = self.args[0]
+        self._load_config()
+
+        if cmd == 'create-example-vocabs':
+            self.create_example_vocabs()
+        if cmd == 'clean':
+            self.clean()
+        else:
+            log.error('Command "%s" not recognized' % (cmd,))
+
+    def create_example_vocabs(self):
+        '''
+        Adds example vocabularies to the database if they don't already exist.
+        '''
+        user = get_action('get_site_user')({'model': model, 'ignore_auth': True}, {})
+        context = {'model': model, 'session': model.Session, 'user': user['name']}
+
+        try:
+            data = {'id': forms.GENRE_VOCAB}
+            get_action('vocabulary_show')(context, data)
+            log.info("Example genre vocabulary already exists, skipping.")
+        except NotFound:
+            log.info("Creating vocab %s" % forms.GENRE_VOCAB)
+            data = {'name': forms.GENRE_VOCAB}
+            vocab = get_action('vocabulary_create')(context, data)
+            log.info("Adding tag %s to vocab %s" % ('jazz', forms.GENRE_VOCAB))
+            data = {'name': 'jazz', 'vocabulary_id': vocab['id']}
+            get_action('tag_create')(context, data)
+            log.info("Adding tag %s to vocab %s" % ('soul', forms.GENRE_VOCAB))
+            data = {'name': 'soul', 'vocabulary_id': vocab['id']}
+            get_action('tag_create')(context, data)
+
+        try:
+            data = {'id': forms.COMPOSER_VOCAB}
+            get_action('vocabulary_show')(context, data)
+            log.info("Example composer vocabulary already exists, skipping.")
+        except NotFound:
+            log.info("Creating vocab %s" % forms.COMPOSER_VOCAB)
+            data = {'name': forms.COMPOSER_VOCAB}
+            vocab = get_action('vocabulary_create')(context, data)
+            log.info("Adding tag %s to vocab %s" % ('Bob Mintzer', forms.COMPOSER_VOCAB))
+            data = {'name': 'Bob Mintzer', 'vocabulary_id': vocab['id']}
+            get_action('tag_create')(context, data)
+            log.info("Adding tag %s to vocab %s" % ('Steve Lewis', forms.COMPOSER_VOCAB))
+            data = {'name': 'Steve Lewis', 'vocabulary_id': vocab['id']}
+            get_action('tag_create')(context, data)
+
+    def clean(self):
+        log.error("Clean command not yet implemented")
+

--- a/ckanext/example/forms.py
+++ b/ckanext/example/forms.py
@@ -1,23 +1,29 @@
-import os, logging
+import os
+import logging
+from pylons import tmpl_context as c
 from ckan.authz import Authorizer
 from ckan.logic.converters import convert_to_extras,\
     convert_from_extras, convert_to_tags, convert_from_tags, free_tags_only
-from ckan.logic import get_action
+from ckan.logic import get_action, NotFound
 from ckan.logic.schema import package_form_schema, group_form_schema
 from ckan.lib.base import c, model
-from ckan.plugins import IDatasetForm, IGroupForm, IConfigurer, IConfigurable
+from ckan.plugins import IDatasetForm, IGroupForm, IConfigurer
 from ckan.plugins import IGenshiStreamFilter
 from ckan.plugins import implements, SingletonPlugin
-from ckan.lib.navl.validators import ignore_missing, not_empty, keep_extras
+from ckan.lib.navl.validators import ignore_missing, keep_extras
 
 log = logging.getLogger(__name__)
+
+GENRE_VOCAB = u'genre_vocab'
+COMPOSER_VOCAB = u'composer_vocab'
+
 
 class ExampleGroupForm(SingletonPlugin):
     """This plugin demonstrates how a class packaged as a CKAN
     extension might extend CKAN behaviour by providing custom forms
     based on the type of a Group.
 
-    In this case, we implement two extension interfaces to provide custom 
+    In this case, we implement two extension interfaces to provide custom
     forms for specific types of group.
 
       - ``IConfigurer`` allows us to override configuration normally
@@ -30,7 +36,7 @@
         class will be used. 
     """
     implements(IGroupForm, inherit=True)
-    implements(IConfigurer, inherit=True)    
+    implements(IConfigurer, inherit=True)
     
     def update_config(self, config):
         """
@@ -48,7 +54,7 @@
         """
         Returns a string representing the location of the template to be
         rendered.  e.g. "forms/group_form.html".
-        """        
+        """
         return 'forms/group_form.html'
 
     def group_types(self):
@@ -111,14 +117,13 @@
         found in the ``ini``-file.  Here we use it to specify where the
         form templates can be found.
       - ``IDatasetForm`` allows us to provide a custom form for a dataset
-        based on the type_name that may be set for a package.  Where the 
-        type_name matches one of the values in package_types then this 
-        class will be used. 
+        based on the type_name that may be set for a package.  Where the
+        type_name matches one of the values in package_types then this
+        class will be used.
     """
     implements(IDatasetForm, inherit=True)
     implements(IConfigurer, inherit=True)    
-    implements(IConfigurable)
-    implements(IGenshiStreamFilter)
+    implements(IGenshiStreamFilter, inherit=True)
     
     def update_config(self, config):
         """
@@ -132,45 +137,11 @@
         config['extra_template_paths'] = ','.join([template_dir,
                 config.get('extra_template_paths', '')])
 
-    def configure(self, config):
-        '''
-        Adds some new vocabularies to the database if they don't already exist.
-
-        '''
-        # Add a 'genre' vocabulary with some tags.
-        self.genre_vocab = model.Vocabulary.get('Genre')
-        if not self.genre_vocab:
-            log.info("Adding vocab Genre")
-            self.genre_vocab = model.Vocabulary('Genre')
-            model.Session.add(self.genre_vocab)
-            model.Session.commit()
-            log.info("Adding example tags to vocab %s" % self.genre_vocab.name)
-            jazz_tag = model.Tag('jazz', self.genre_vocab.id)
-            soul_tag = model.Tag('soul', self.genre_vocab.id)
-            model.Session.add(jazz_tag)
-            model.Session.add(soul_tag)
-            model.Session.commit()
-
-        # Add a 'composer' vocabulary with some tags.
-        self.composer_vocab = model.Vocabulary.get('Composer')
-        if not self.composer_vocab:
-            log.info("Adding vocab Composer")
-            self.composer_vocab = model.Vocabulary('Composer')
-            model.Session.add(self.composer_vocab)
-            model.Session.commit()
-            log.info("Adding example tags to vocab %s" %
-                    self.composer_vocab.name)
-            mintzer_tag = model.Tag('Bob Mintzer', self.composer_vocab.id)
-            lewis_tag = model.Tag('Steve Lewis', self.composer_vocab.id)
-            model.Session.add(mintzer_tag)
-            model.Session.add(lewis_tag)
-            model.Session.commit()
-
     def package_form(self):
         """
         Returns a string representing the location of the template to be
         rendered.  e.g. "package/new_package_form.html".
-        """        
+        """
         return 'forms/dataset_form.html'
 
     def is_fallback(self):
@@ -178,7 +149,7 @@
         Returns true iff this provides the fallback behaviour, when no other
         plugin instance matches a package's type.
 
-        As this is not the fallback controller we should return False.  If 
+        As this is not the fallback controller we should return False.  If
         we were wanting to act as the fallback, we'd return True
         """
         return True
@@ -200,13 +171,17 @@
         """
         Adds variables to c just prior to the template being rendered that can
         then be used within the form
-        """        
+        """
         c.licences = [('', '')] + model.Package.get_license_options()
         c.publishers = [('Example publisher', 'Example publisher 2')]
         c.is_sysadmin = Authorizer().is_sysadmin(c.user)
         c.resource_columns = model.Resource.get_columns()
-        c.genre_tags = get_action('tag_list')(context, {'vocabulary_id': self.genre_vocab.name})
-        c.composer_tags = get_action('tag_list')(context, {'vocabulary_id': self.composer_vocab.name})
+        try:
+            c.genre_tags = get_action('tag_list')(context, {'vocabulary_id': GENRE_VOCAB})
+            c.composer_tags = get_action('tag_list')(context, {'vocabulary_id': COMPOSER_VOCAB})
+        except NotFound:
+            c.vocab_tags = None
+            c.composer_tags = None
 
         ## This is messy as auths take domain object not data_dict
         pkg = context.get('package') or c.pkg
@@ -221,9 +196,9 @@
         """
         schema = package_form_schema()
         schema.update({
-            'published_by': [not_empty, unicode, convert_to_extras],
-            'genre_tags': [ignore_missing, convert_to_tags(self.genre_vocab.name)],
-            'composer_tags': [ignore_missing, convert_to_tags(self.composer_vocab.name)],
+            'published_by': [ignore_missing, unicode, convert_to_extras],
+            'genre_tags': [ignore_missing, convert_to_tags(GENRE_VOCAB)],
+            'composer_tags': [ignore_missing, convert_to_tags(COMPOSER_VOCAB)]
         })
         return schema
     
@@ -237,10 +212,12 @@
             'tags': {
                 '__extras': [keep_extras, free_tags_only]
             },
-            'genre_tags_selected': [convert_from_tags(self.genre_vocab.name),
-                ignore_missing],
+            'genre_tags_selected': [
+                convert_from_tags(GENRE_VOCAB), ignore_missing
+            ],
             'composer_tags_selected': [
-                convert_from_tags(self.composer_vocab.name), ignore_missing],
+                convert_from_tags(COMPOSER_VOCAB), ignore_missing
+            ],
             'published_by': [convert_from_extras, ignore_missing],
         })
         return schema
@@ -257,20 +234,28 @@
         from genshi.filters import Transformer
         from genshi.input import HTML
         routes = request.environ.get('pylons.routes_dict')
+        context = {'model': model}
         if routes.get('controller') == 'package' \
             and routes.get('action') == 'read':
-                for vocab in (self.genre_vocab, self.composer_vocab):
-                    vocab_tags = [tag for tag in c.pkg_dict.get('tags', [])
-                            if tag.get('vocabulary_id') == vocab.id]
+                for vocab in (GENRE_VOCAB, COMPOSER_VOCAB):
+                    try:
+                        vocab = get_action('vocabulary_show')(context, {'id': vocab})
+                        vocab_tags = [t for t in c.pkg_dict.get('tags', [])
+                                      if t.get('vocabulary_id') == vocab['id']]
+                    except NotFound:
+                        vocab_tags = None
+
                     if not vocab_tags:
                         continue
+
                     html = '<li class="sidebar-section">'
-                    html = html + '<h3>%s</h3>' % vocab.name
+                    html = html + '<h3>%s</h3>' % vocab['name']
                     html = html + '<ul class="tags clearfix">'
                     for tag in vocab_tags:
-                        html = html + '<li>%s</li>' % tag.get('name')
+                        html = html + '<li>%s</li>' % tag['name']
                     html = html + "</ul></li>"
-                    stream = stream | Transformer("//div[@id='sidebar']")\
-                        .append(HTML(html))
+                    stream = stream | Transformer(
+                        "//div[@id='sidebar']//ul[@class='widget-list']"
+                    ).append(HTML(html))
         return stream
 

--- a/ckanext/example/theme/templates/forms/dataset_form.html
+++ b/ckanext/example/theme/templates/forms/dataset_form.html
@@ -41,7 +41,7 @@
 
     <dt class="name-label"><label class="field_req" for="name">Url</label></dt>
     <dd class="name-field">
-      <span class="js-url-text url-text">${url(controller='package', action='index')+'/'}<span class="js-url-viewmode js-url-suffix">&nbsp;</span><a href="#" style="display: none;" class="url-edit js-url-editlink js-url-viewmode">(edit)</a></span>
+      <span class="js-url-text url-text">${h.url(controller='package', action='index')+'/'}<span class="js-url-viewmode js-url-suffix">&nbsp;</span><a href="#" style="display: none;" class="url-edit js-url-editlink js-url-viewmode">(edit)</a></span>
       <input style="display: none;" id="name" maxlength="100" name="name" type="text" class="url-input js-url-editmode js-url-input" value="${data.get('name', '')}" />
       <p class="js-url-is-valid">&nbsp;</p>
     </dd>
@@ -144,8 +144,8 @@
     <dd class="tags-instructions field_error" py:if="errors.get('tag_string', '')">${errors.get('tag_string', '')}</dd>
   </dl>
 
-  <h3>Musical Genre</h3>
-  <dl>
+  <h3 py:if="c.genre_tags">Musical Genre</h3>
+  <dl py:if="c.genre_tags">
     <dt class="tags-label"><label class="field_opt" for="tags_vocab">Tags</label></dt>
     <dd class="tags-field">
       <select id="genre_tags" class="chzn-select" name="genre_tags" size="60" multiple="multiple">
@@ -160,8 +160,8 @@
     <dd class="tags-instructions field_error" py:if="errors.get('genre_tag_string', '')">${errors.get('genre_tag_string', '')}</dd>
   </dl>
 
-  <h3>Composer</h3>
-  <dl>
+  <h3 py:if="c.composer_tags">Composer</h3>
+  <dl py:if="c.composer_tags">
     <dt class="tags-label"><label class="field_opt" for="tags_vocab">Tags</label></dt>
     <dd class="tags-field">
       <select id="composer_tags" class="chzn-select" name="composer_tags" size="60" multiple="multiple">

file:a/setup.py -> file:b/setup.py
--- a/setup.py
+++ b/setup.py
@@ -17,9 +17,7 @@
 	namespace_packages=['ckanext', 'ckanext.example'],
 	include_package_data=True,
 	zip_safe=False,
-	install_requires=[
-		# -*- Extra requirements: -*-
-	],
+	install_requires=[],
 	entry_points=\
 	"""
         [ckan.plugins]
@@ -29,6 +27,9 @@
 
         [ckan.forms]
         example_form = ckanext.example.package_form:get_example_fieldset
+
+        [paste.paster_command]
+        example=ckanext.example.commands:ExampleCommand
 	""",
 )