| 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.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.name, f) for f in model._meta.fields if self.field_filter(f)]) |
| else: |
| return dict([(f.name, 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 u'' |
| return mark_safe(u'<p class="filter"><strong>View by:</strong> %s</p>' % \ |
| u', '.join(['<a href="fields/%s/">%s</a>' % (f.name, 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(u'%s%s/%s/%s/' % ( |
| easy_instance_field.model.url(), |
| plugin_name, easy_instance_field.field.name, |
| urllib.quote(field_value, safe='')))] |
| |
| def model_view(self, request, model_databrowse, url): |
| self.model, self.site = model_databrowse.model, model_databrowse.site |
| 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 self.fields.has_key(url_bits[0]): |
| 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.site, self.model) |
| field_list = self.fields.values() |
| field_list.sort(lambda x, y: cmp(x.verbose_name, y.verbose_name)) |
| return render_to_response('databrowse/fieldchoice_homepage.html', {'root_url': self.site.root_url, 'model': easy_model, 'field_list': field_list}) |
| |
| def field_view(self, request, field, value=None): |
| easy_model = EasyModel(self.site, self.model) |
| easy_field = easy_model.field(field.name) |
| if value is not None: |
| obj_list = easy_model.objects(**{field.name: value}) |
| return render_to_response('databrowse/fieldchoice_detail.html', {'root_url': self.site.root_url, 'model': easy_model, 'field': easy_field, 'value': value, 'object_list': obj_list}) |
| obj_list = [v[field.name] for v in self.model._default_manager.distinct().order_by(field.name).values(field.name)] |
| return render_to_response('databrowse/fieldchoice_list.html', {'root_url': self.site.root_url, 'model': easy_model, 'field': easy_field, 'object_list': obj_list}) |
