app/soc/logic/lists.py
author Sverre Rabbelier <srabbelier@gmail.com>
Fri, 23 Jan 2009 21:20:33 +0000
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parent 625 ec867361b5ba
child 1307 091a21cf3627
permissions -rw-r--r--
Adust the as_table tag to render a pick link if appropriate The templates are adjusted to pass on a 'reference' value, which is the url_name of the view from which the entity should be picked. The as_table (and related) function(s) construct and then pass on this argument and enable takes_contex so that we have access to the context of the enclosing template. We only extract ReferenceProperties that end with '_link_id' since that is how all RP's are currently named. It is not possible to create a field with the same name as the RP, as GAE will try to interpret it's contents as the key of an entity before even calling any function we can override. Patch by: Sverre Rabbelier
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#!/usr/bin/python2.5
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#
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# Copyright 2008 the Melange authors.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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#   http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""List generation logic.
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"""
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__authors__ = [
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  '"Sverre Rabbelier" <sverre@rabbelier.nl>',
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  ]
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class Lists(object):
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  """List array suitable for enumerating over with just 'for in'.
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  """
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  DEF_PASSTHROUGH_FIELDS = [
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      'pagination',
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      'pagination_form',
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      'description',
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      'heading',
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      'row',
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      'limit',
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      'newest',
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      'prev',
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      'next',
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      'first',
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      'last',
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      ]
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  def __init__(self, contents):
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    """Constructs a new Lists object with the specified contents.
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    """
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    # All the contents of all the lists
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    self._contents = contents
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    self._content = {}
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    # For iterating over all the lists
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    self._lists = range(len(contents))
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    self._list_data = []
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    # For iterating over the rows
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    self._rows = []
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    self._row_data = []
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  def __getattr__(self, attr):
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    """Delegate field lookup to the current list if appropriate.
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    If, and only if, a lookup is done on one of the fields defined in
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    DEF_PASSTHROUGH_FIELDS, and the current list defines this field,
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    the value from the current list is returned.
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    """
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    if attr not in self.DEF_PASSTHROUGH_FIELDS:
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      raise AttributeError()
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    if attr not in self._content:
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      raise AttributeError()
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    return self.get(attr)
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  def get(self, item):
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    """Returns the item for the current list data.
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    """
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    return self._content[item]
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  def nextList(self):
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    """Shifts out the current list content.
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    The main content of the next list is returned for further processing.
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    """
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    # Advance the list data once
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    self._content = self._contents[0]
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    self._contents = self._contents[1:]
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    # Update internal 'iterators'
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    self._list_data = self.get('data')
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    self._rows = range(len(self._list_data))
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    return self.get('main')
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  def nextRow(self):
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    """Returns the next list row for the current list.
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    Before calling this method, nextList should be called at least once.
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    """
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    # Update internal 'iterators'
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    self._row_data =  self._list_data[0]
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    # Advance the row data once
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    self._list_data = self._list_data[1:]
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    return self.get('row')
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  def lists(self):
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    """Returns a list of numbers the size of the amount of lists.
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    This method can be used to iterate over all lists with shift,
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    without using a while loop.
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    """
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    return self._lists
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  def rows(self):
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    """Returns a list of numbers the size of the amount of items.
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    This method can be used to iterate over all items with next for
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    the current list, without using a while loop.
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    """
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    return self._rows
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  def item(self):
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    """Returns the current row item for the current list.
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    Before calling this method, nextRow should be called at least once.
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    """
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    return self._row_data
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  def redirect(self):
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    """Returns the redirect for the current row item in the current list.
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    """
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    action, args = self.get('action')
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    return action(self._row_data, args)