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from __future__ import unicode_literals
from django import http
from django.db import models
from django.contrib.databrowse.datastructures import EasyModel
from django.contrib.databrowse.sites import DatabrowsePlugin
from django.shortcuts import render_to_response
from django.utils.html import format_html, format_html_join
from django.utils.text import capfirst
from django.utils.encoding import smart_str, force_unicode
from django.utils.safestring import mark_safe
import urllib
class FieldChoicePlugin(DatabrowsePlugin):
def __init__(self, field_filter=None):
# If field_filter is given, it should be a callable that takes a
# Django database Field instance and returns True if that field should
# be included. If field_filter is None, that all fields will be used.
self.field_filter = field_filter
def field_dict(self, model):
Helper function that returns a dictionary of all fields in the given
model. If self.field_filter is set, it only includes the fields that
match the filter.
if self.field_filter:
return dict([(, f) for f in model._meta.fields if self.field_filter(f)])
return dict([(, f) for f in model._meta.fields if not f.rel and not f.primary_key and not f.unique and not isinstance(f, (models.AutoField, models.TextField))])
def model_index_html(self, request, model, site):
fields = self.field_dict(model)
if not fields:
return ''
return format_html('<p class="filter"><strong>View by:</strong> {0}</p>',
format_html_join(', ', '<a href="fields/{0}/">{1}</a>',
((, force_unicode(capfirst(f.verbose_name))) for f in fields.values())))
def urls(self, plugin_name, easy_instance_field):
if easy_instance_field.field in self.field_dict(easy_instance_field.model.model).values():
field_value = smart_str(easy_instance_field.raw_value)
return [mark_safe('%s%s/%s/%s/' % (
urllib.quote(field_value, safe='')))]
def model_view(self, request, model_databrowse, url):
self.model, = model_databrowse.model,
self.fields = self.field_dict(self.model)
# If the model has no fields with choices, there's no point in going
# further.
if not self.fields:
raise http.Http404('The requested model has no fields.')
if url is None:
return self.homepage_view(request)
url_bits = url.split('/', 1)
if url_bits[0] in self.fields:
return self.field_view(request, self.fields[url_bits[0]], *url_bits[1:])
raise http.Http404('The requested page does not exist.')
def homepage_view(self, request):
easy_model = EasyModel(, self.model)
field_list = self.fields.values()
field_list.sort(key=lambda k: k.verbose_name)
return render_to_response('databrowse/fieldchoice_homepage.html', {'root_url':, 'model': easy_model, 'field_list': field_list})
def field_view(self, request, field, value=None):
easy_model = EasyModel(, self.model)
easy_field = easy_model.field(
if value is not None:
obj_list = easy_model.objects(**{ value})
return render_to_response('databrowse/fieldchoice_detail.html', {'root_url':, 'model': easy_model, 'field': easy_field, 'value': value, 'object_list': obj_list})
obj_list = [v[] for v in self.model._default_manager.distinct().order_by(]
return render_to_response('databrowse/fieldchoice_list.html', {'root_url':, 'model': easy_model, 'field': easy_field, 'object_list': obj_list})
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