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1 """
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2 This module contains custom forms to tailor the Haystack search application to
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3 our needs.
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4
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5 """
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6 import logging
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7
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8 from django import forms
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9 from django.conf import settings
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10 from haystack.forms import ModelSearchForm
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11
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12
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13 MODEL_CHOICES = (
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14 ('forums.topic', 'Forum Topics'),
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15 ('forums.post', 'Forum Posts'),
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16 ('news.story', 'News Stories'),
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17 ('bio.userprofile', 'User Profiles'),
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18 ('weblinks.link', 'Links'),
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19 ('downloads.download', 'Downloads'),
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20 ('podcast.item', 'Podcasts'),
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21 ('ygroup.post', 'Yahoo Group Archives'),
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22 )
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23
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24 logger = logging.getLogger(__name__)
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25
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26
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27 class CustomModelSearchForm(ModelSearchForm):
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28 """
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29 This customized ModelSearchForm allows us to explictly label and order
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30 the model choices.
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31
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32 We also provide "all words", "exact phrase", and "exclude" text input boxes.
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33 Haystack 2.1.0's auto_query() function did not seem to work right so we just
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34 rolled our own.
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35
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36 """
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37 q = forms.CharField(required=False, label='All these words',
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38 widget=forms.TextInput(attrs={'type': 'search', 'class': 'search',
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39 'size': 48}))
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40 exact = forms.CharField(required=False, label='This exact word or phrase',
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41 widget=forms.TextInput(attrs={'type': 'search', 'class': 'search',
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42 'size': 48}))
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43 exclude = forms.CharField(required=False, label='None of these words',
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44 widget=forms.TextInput(attrs={'type': 'search', 'class': 'search',
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45 'size': 48}))
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46
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47 def __init__(self, *args, **kwargs):
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48 super(CustomModelSearchForm, self).__init__(*args, **kwargs)
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49 self.fields['models'] = forms.MultipleChoiceField(choices=MODEL_CHOICES,
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50 label='Search in', widget=forms.CheckboxSelectMultiple)
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51
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52 def clean(self):
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53 if not settings.SEARCH_QUEUE_ENABLED:
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54 raise forms.ValidationError("Our search function is offline for "
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55 "maintenance. Please try again later. "
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56 "We apologize for any inconvenience.")
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57
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58 if not (self.cleaned_data['q'] or self.cleaned_data['exact'] or
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59 self.cleaned_data['exclude']):
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60 raise forms.ValidationError('Please supply some search terms')
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61
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62 return self.cleaned_data
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63
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64 def search(self):
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65 if not self.is_valid():
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66 return self.no_query_found()
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67
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68 logger.info('Search executed: /%s/%s/%s/ in %s',
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69 self.cleaned_data['q'],
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70 self.cleaned_data['exact'],
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71 self.cleaned_data['exclude'],
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72 self.cleaned_data['models'])
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73
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74 sqs = self.searchqueryset
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75
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76 # Note that in Haystack 2.x content is untrusted and is automatically
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77 # auto-escaped for us.
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78 #
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79 # Filter on the q terms; these should be and'ed together:
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80 terms = self.cleaned_data['q'].split()
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81 for term in terms:
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82 sqs = sqs.filter(content=term)
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83
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84 # Exact words or phrases:
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85 if self.cleaned_data['exact']:
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86 sqs = sqs.filter(content__exact=self.cleaned_data['exact'])
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87
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88 # Exclude terms:
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89 terms = self.cleaned_data['exclude'].split()
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90 for term in terms:
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91 sqs = sqs.exclude(content=term)
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92
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93 if self.load_all:
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94 sqs = sqs.load_all()
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95
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96 # Apply model filtering
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97 sqs = sqs.models(*self.get_models())
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98
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99 return sqs
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