[forms] add vocab tags back to dataset view page
[forms] add vocab tags back to dataset view page

file:a/README.rst -> file:b/README.rst
This CKAN Extension demonstrates some common patterns for customising a CKAN instance. This CKAN Extension demonstrates some common patterns for customising a CKAN instance.
   
It comprises: It comprises:
   
* A CKAN Extension "plugin" at ``ckanext/example/plugin.py`` which, when * A CKAN Extension "plugin" at ``ckanext/example/plugin.py`` which, when
loaded, overrides various settings in the core ``ini``-file to provide: loaded, overrides various settings in the core ``ini``-file to provide:
   
* A path to local customisations of the core templates and stylesheets * A path to local customisations of the core templates and stylesheets
* A "stream filter" that replaces arbitrary strings in rendered templates * A "stream filter" that replaces arbitrary strings in rendered templates
* A "route" to override and extend the default behaviour of a core CKAN page * A "route" to override and extend the default behaviour of a core CKAN page
   
* A custom Pylons controller for overriding some core CKAN behaviour * A custom Pylons controller for overriding some core CKAN behaviour
   
* A custom Package edit form * A custom Package edit form
   
  * A custom Group edit form
   
* A plugin that allows for custom forms to be used for datasets based on * A plugin that allows for custom forms to be used for datasets based on
their "type". their "type".
   
* A custom User registration and edition form * A custom User registration and edition form
   
* Some simple template customisations * Some simple template customisations
   
Installation Installation
============ ============
   
To install this package, from your CKAN virtualenv, run the following from your CKAN base folder (e.g. ``pyenv/``):: To install this package, from your CKAN virtualenv, run the following from your CKAN base folder (e.g. ``pyenv/``)::
   
pip install -e git+https://github.com/okfn/ckanext-example#egg=ckanext-example pip install -e git+https://github.com/okfn/ckanext-example#egg=ckanext-example
   
Then activate it by setting ``ckan.plugins = example`` in your main ``ini``-file. Then activate it by setting ``ckan.plugins = example`` in your main ``ini``-file.
   
   
Orientation Orientation
=========== ===========
   
* Examine the source code, starting with ``ckanext/example/plugin.py`` * Examine the source code, starting with ``ckanext/example/plugin.py``
   
* To understand the nuts and bolts of this file, which is a CKAN * To understand the nuts and bolts of this file, which is a CKAN
*Extension*, read in conjunction with the "Extension *Extension*, read in conjunction with the "Extension
documentation": http://docs.ckan.org/en/latest/plugins.html documentation": http://docs.ckan.org/en/latest/plugins.html
   
* One thing the extension does is set the values of * One thing the extension does is set the values of
``extra_public_paths`` and ``extra_template_paths`` in the CKAN ``extra_public_paths`` and ``extra_template_paths`` in the CKAN
config, which are "documented config, which are "documented
here": http://docs.ckan.org/en/latest/configuration.html#extra-template-paths here": http://docs.ckan.org/en/latest/configuration.html#extra-template-paths
   
* These are set to point at directories within * These are set to point at directories within
``ckanext/example/theme/`` (in this package). Here we: ``ckanext/example/theme/`` (in this package). Here we:
* override the home page HTML ``ckanext/example/theme/templates/home/index.html`` * override the home page HTML ``ckanext/example/theme/templates/home/index.html``
* provide some extra style by serving ``extra.css`` (which is loaded using the ``ckan.template_head_end`` option * provide some extra style by serving ``extra.css`` (which is loaded using the ``ckan.template_head_end`` option
* customise the navigation and header of the main template in the file ``layout.html``. * customise the navigation and header of the main template in the file ``layout.html``.
   
The latter file is a great place to make global theme alterations. The latter file is a great place to make global theme alterations.
It uses the _layout template_ pattern "described in the Genshi It uses the _layout template_ pattern "described in the Genshi
documentation":http://genshi.edgewall.org/wiki/GenshiTutorial#AddingaLayoutTemplate. documentation":http://genshi.edgewall.org/wiki/GenshiTutorial#AddingaLayoutTemplate.
This allows you to use Xpath selectors to override snippets of HTML This allows you to use Xpath selectors to override snippets of HTML
globally. globally.
   
* The custom package edit form at ``package_form.py`` follows a deprecated * The custom package edit form at ``package_form.py`` follows a deprecated
way to make a form (using FormAlchemy). This part of the Example Theme needs way to make a form (using FormAlchemy). This part of the Example Theme needs
updating. In the meantime, follow the instructions at: updating. In the meantime, follow the instructions at:
http://readthedocs.org/docs/ckan/en/latest/forms.html http://readthedocs.org/docs/ckan/en/latest/forms.html
   
   
  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()
  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)
 
import os, logging import os
  import logging
  from pylons import tmpl_context as c
from ckan.authz import Authorizer from ckan.authz import Authorizer
import ckan.logic.action.create as create from ckan.logic.converters import convert_to_extras,\
import ckan.logic.action.update as update convert_from_extras, convert_to_tags, convert_from_tags, free_tags_only
import ckan.logic.action.get as get from ckan.logic import get_action, NotFound
from ckan.logic.converters import date_to_db, date_to_form, convert_to_extras, convert_from_extras from ckan.logic.schema import package_form_schema, group_form_schema
from ckan.logic import NotFound, NotAuthorized, ValidationError from ckan.lib.base import c, model
from ckan.logic import tuplize_dict, clean_dict, parse_params  
import ckan.logic.schema as default_schema  
from ckan.logic.schema import package_form_schema  
import ckan.logic.validators as val  
from ckan.lib.base import BaseController, render, c, model, abort, request  
from ckan.lib.base import redirect, _, config, h  
from ckan.lib.package_saver import PackageSaver  
from ckan.lib.field_types import DateType, DateConvertError  
from ckan.lib.navl.dictization_functions import Invalid  
from ckan.lib.navl.dictization_functions import validate, missing  
from ckan.lib.navl.dictization_functions import DataError, flatten_dict, unflatten  
from ckan.plugins import IDatasetForm, IGroupForm, IConfigurer from ckan.plugins import IDatasetForm, IGroupForm, IConfigurer
  from ckan.plugins import IGenshiStreamFilter
from ckan.plugins import implements, SingletonPlugin from ckan.plugins import implements, SingletonPlugin
  from ckan.lib.navl.validators import ignore_missing, keep_extras
from ckan.lib.navl.validators import (ignore_missing,  
not_empty,  
empty,  
ignore,  
keep_extras,  
)  
   
log = logging.getLogger(__name__) log = logging.getLogger(__name__)
   
  GENRE_VOCAB = u'genre_vocab'
  COMPOSER_VOCAB = u'composer_vocab'
   
   
class ExampleGroupForm(SingletonPlugin): class ExampleGroupForm(SingletonPlugin):
"""This plugin demonstrates how a theme packaged as a CKAN """This plugin demonstrates how a class packaged as a CKAN
extension might extend CKAN behaviour. extension might extend CKAN behaviour by providing custom forms
  based on the type of a Group.
In this case, we implement twos extension interfaces to provide custom  
  In this case, we implement two extension interfaces to provide custom
forms for specific types of group. forms for specific types of group.
   
- ``IConfigurer`` allows us to override configuration normally - ``IConfigurer`` allows us to override configuration normally
found in the ``ini``-file. Here we use it to specify where the found in the ``ini``-file. Here we use it to specify where the
form templates can be found. form templates can be found.
   
- ``IGroupForm`` allows us to provide a custom form for a dataset - ``IGroupForm`` allows us to provide a custom form for a dataset
based on the 'type' that may be set for a group. Where the based on the 'type' that may be set for a group. Where the
'type' matches one of the values in group_types then this 'type' matches one of the values in group_types then this
class will be used. class will be used.
""" """
implements(IGroupForm, inherit=True) implements(IGroupForm, inherit=True)
implements(IConfigurer, inherit=True) implements(IConfigurer, inherit=True)
def update_config(self, config): def update_config(self, config):
""" """
This IConfigurer implementation causes CKAN to look in the This IConfigurer implementation causes CKAN to look in the
```templates``` directory when looking for the group_form() ```templates``` directory when looking for the group_form()
""" """
here = os.path.dirname(__file__) here = os.path.dirname(__file__)
rootdir = os.path.dirname(os.path.dirname(here)) rootdir = os.path.dirname(os.path.dirname(here))
template_dir = os.path.join(rootdir, 'ckanext', template_dir = os.path.join(rootdir, 'ckanext',
'example', 'theme', 'templates') 'example', 'theme', 'templates')
config['extra_template_paths'] = ','.join([template_dir, config['extra_template_paths'] = ','.join([template_dir,
config.get('extra_template_paths', '')]) config.get('extra_template_paths', '')])
def group_form(self): def group_form(self):
""" """
Returns a string representing the location of the template to be Returns a string representing the location of the template to be
rendered. e.g. "forms/group_form.html". rendered. e.g. "forms/group_form.html".
""" """
from pdb import set_trace; set_trace()  
   
return 'forms/group_form.html' return 'forms/group_form.html'
   
def group_types(self): def group_types(self):
""" """
Returns an iterable of group type strings. Returns an iterable of group type strings.
   
If a request involving a group of one of those types is made, then If a request involving a group of one of those types is made, then
this plugin instance will be delegated to. this plugin instance will be delegated to.
   
There must only be one plugin registered to each group type. Any There must only be one plugin registered to each group type. Any
attempts to register more than one plugin instance to a given group attempts to register more than one plugin instance to a given group
type will raise an exception at startup. type will raise an exception at startup.
""" """
return ["example"] return ["testgroup"]
   
def is_fallback(self): def is_fallback(self):
""" """
Returns true iff this provides the fallback behaviour, when no other Returns true iff this provides the fallback behaviour, when no other
plugin instance matches a group's type. plugin instance matches a group'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 we were wanting to act as the fallback, we'd return True
""" """
return False return False
  def form_to_db_schema(self):
  """
  Returns the schema for mapping group data from a form to a format
  suitable for the database.
  """
  return group_form_schema()
   
  def db_to_form_schema(self):
  """
  Returns the schema for mapping group data from the database into a
  format suitable for the form (optional)
  """
  return {}
   
  def check_data_dict(self, data_dict):
  """
  Check if the return data is correct.
   
  raise a DataError if not.
  """
   
  def setup_template_variables(self, context, data_dict):
  """
  Add variables to c just prior to the template being rendered.
  """
   
class ExampleDatasetForm(SingletonPlugin): class ExampleDatasetForm(SingletonPlugin):
"""This plugin demonstrates how a theme packaged as a CKAN """This plugin demonstrates how a theme packaged as a CKAN
extension might extend CKAN behaviour. extension might extend CKAN behaviour.
   
In this case, we implement three extension interfaces: In this case, we implement three extension interfaces:
   
- ``IConfigurer`` allows us to override configuration normally - ``IConfigurer`` allows us to override configuration normally
found in the ``ini``-file. Here we use it to specify where the found in the ``ini``-file. Here we use it to specify where the
form templates can be found. form templates can be found.
- ``IDatasetForm`` allows us to provide a custom form for a dataset - ``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 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 type_name matches one of the values in package_types then this
class will be used. class will be used.
""" """
implements(IDatasetForm, inherit=True) implements(IDatasetForm, inherit=True)
implements(IConfigurer, inherit=True) implements(IConfigurer, inherit=True)
  implements(IGenshiStreamFilter, inherit=True)
def update_config(self, config): def update_config(self, config):
""" """
This IConfigurer implementation causes CKAN to look in the This IConfigurer implementation causes CKAN to look in the
```templates``` directory when looking for the package_form() ```templates``` directory when looking for the package_form()
""" """
here = os.path.dirname(__file__) here = os.path.dirname(__file__)
rootdir = os.path.dirname(os.path.dirname(here)) rootdir = os.path.dirname(os.path.dirname(here))
template_dir = os.path.join(rootdir, 'ckanext', template_dir = os.path.join(rootdir, 'ckanext',
'example', 'theme', 'templates') 'example', 'theme', 'templates')
config['extra_template_paths'] = ','.join([template_dir, config['extra_template_paths'] = ','.join([template_dir,
config.get('extra_template_paths', '')]) config.get('extra_template_paths', '')])
   
def package_form(self): def package_form(self):
""" """
Returns a string representing the location of the template to be Returns a string representing the location of the template to be
rendered. e.g. "package/new_package_form.html". rendered. e.g. "package/new_package_form.html".
""" """
return 'forms/dataset_form.html' return 'forms/dataset_form.html'
   
def is_fallback(self): def is_fallback(self):
""" """
Returns true iff this provides the fallback behaviour, when no other Returns true iff this provides the fallback behaviour, when no other
plugin instance matches a package's type. 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 we were wanting to act as the fallback, we'd return True
""" """
return False return True
   
def package_types(self): def package_types(self):
""" """
Returns an iterable of package type strings. Returns an iterable of package type strings.
   
If a request involving a package of one of those types is made, then If a request involving a package of one of those types is made, then
this plugin instance will be delegated to. this plugin instance will be delegated to.
   
There must only be one plugin registered to each package type. Any There must only be one plugin registered to each package type. Any
attempts to register more than one plugin instance to a given package attempts to register more than one plugin instance to a given