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annotate piecrust/data/provider.py @ 7:343d08ef5668

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More PieCrust 3 fixes, and a couple of miscellaneous bug fixes.
author Ludovic Chabant <ludovic@chabant.com>
date Sat, 16 Aug 2014 15:07:22 -0700
parents 474c9882decf
children 923699e816d0
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rev   line source
3
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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1 import time
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2 from piecrust.data.iterators import PageIterator
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3 from piecrust.sources.base import ArraySource
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4
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5
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6 class DataProvider(object):
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7 debug_render_dynamic = ['_debugRenderUserData']
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8 debug_render_invoke_dynamic = ['_debugRenderUserData']
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9
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10 def __init__(self, source, page, user_data):
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11 if source.app is not page.app:
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12 raise Exception("The given source and page don't belong to "
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13 "the same application.")
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14 self._source = source
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15 self._page = page
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16 self._user_data = user_data
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17
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18 def __getattr__(self, name):
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19 if self._user_data is not None:
7
343d08ef5668 More PieCrust 3 fixes, and a couple of miscellaneous bug fixes.
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20 try:
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21 return self._user_data[name]
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22 except KeyError:
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23 pass
3
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24 raise AttributeError()
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25
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26 def __getitem__(self, name):
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27 if self._user_data is not None:
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28 return self._user_data[name]
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29 raise KeyError()
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30
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31 def _debugRenderUserData(self):
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32 if self._user_data:
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33 return list(self._user_data.keys())
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34 return []
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35
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36
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37 class CompositeDataProvider(object):
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38 def __init__(self, providers):
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39 self._providers = providers
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40
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41 def __getattr__(self, name):
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42 for p in self._providers:
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43 try:
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44 return getattr(p, name)
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45 except AttributeError:
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46 pass
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47 raise AttributeError()
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48
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49
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50 class IteratorDataProvider(DataProvider):
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51 PROVIDER_NAME = 'iterator'
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52
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53 debug_render_doc = """Provides a list of pages."""
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54
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55 def __init__(self, source, page, user_data):
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56 super(IteratorDataProvider, self).__init__(source, page, user_data)
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57 self._pages = PageIterator(source, current_page=page)
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58 self._pages._iter_event += self._onIteration
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59 self._ctx_set = False
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60
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61 def __len__(self):
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62 return len(self._pages)
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63
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64 def __getitem__(self, key):
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65 return self._pages[key]
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66
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67 def __iter__(self):
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68 return iter(self._pages)
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69
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70 def _onIteration(self):
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71 if not self._ctx_set:
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72 eis = self._page.app.env.exec_info_stack
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73 eis.current_page_info.render_ctx.used_source_names.add(
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74 self._source.name)
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75 self._ctx_set = True
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76
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77
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78 class BlogDataProvider(DataProvider):
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79 PROVIDER_NAME = 'blog'
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80
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81 debug_render_doc = """Provides a list of blog posts and yearly/monthly
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82 archives."""
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83 debug_render = ['posts', 'years', 'months']
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84 debug_render_dynamic = (['_debugRenderTaxonomies'] +
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85 DataProvider.debug_render_dynamic)
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86
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87 def __init__(self, source, page, user_data):
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88 super(BlogDataProvider, self).__init__(source, page, user_data)
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89 self._yearly = None
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90 self._monthly = None
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91 self._taxonomies = {}
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92 self._ctx_set = False
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93
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94 def __getattr__(self, name):
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95 if self._source.app.getTaxonomy(name) is not None:
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96 return self._buildTaxonomy(name)
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97 return super(BlogDataProvider, self).__getattr__(name)
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98
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99 @property
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100 def posts(self):
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101 it = PageIterator(self._source, current_page=self._page)
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102 it._iter_event += self._onIteration
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103 return it
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104
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105 @property
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106 def years(self):
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107 return self._buildYearlyArchive()
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108
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109 @property
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110 def months(self):
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111 return self._buildMonthlyArchive()
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112
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113 def _debugRenderTaxonomies(self):
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114 return [t.name for t in self._source.app.taxonomies]
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115
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116 def _buildYearlyArchive(self):
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117 if self._yearly is not None:
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118 return self._yearly
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119
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120 self._yearly = []
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121 for fac in self._source.getPageFactories():
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122 post = fac.buildPage()
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123 year = post.datetime.strftime('%Y')
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124
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125 posts_this_year = next(
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126 filter(lambda y: y.name == year, self._yearly),
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127 None)
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128 if posts_this_year is None:
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129 timestamp = time.mktime(
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130 (post.datetime.year, 1, 1, 0, 0, 0, 0, 0, -1))
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131 posts_this_year = BlogArchiveEntry(self._page, year, timestamp)
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132 self._yearly.append(posts_this_year)
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133
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134 posts_this_year._data_source.append(post)
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135 self._yearly = sorted(self._yearly,
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136 key=lambda e: e.timestamp,
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137 reverse=True)
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138 self._onIteration()
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139 return self._yearly
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140
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141 def _buildMonthlyArchive(self):
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142 if self._monthly is not None:
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143 return self._monthly
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144
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145 self._monthly = []
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146 for fac in self._source.getPageFactories():
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147 post = fac.buildPage()
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148 month = post.datetime.strftime('%B %Y')
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149
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150 posts_this_month = next(
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151 filter(lambda m: m.name == month, self._monthly),
3
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152 None)
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153 if posts_this_month is None:
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154 timestamp = time.mktime(
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155 (post.datetime.year, post.datetime.month, 1,
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156 0, 0, 0, 0, 0, -1))
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157 posts_this_month = BlogArchiveEntry(self._page, month, timestamp)
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158 self._monthly.append(posts_this_month)
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159
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160 posts_this_month._data_source.append(post)
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161 self._monthly = sorted(self._monthly,
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162 key=lambda e: e.timestamp,
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163 reverse=True)
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164 self._onIteration()
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165 return self._monthly
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166
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167 def _buildTaxonomy(self, tax_name):
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168 if tax_name in self._taxonomies:
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169 return self._taxonomies[tax_name]
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170
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171 posts_by_tax_value = {}
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172 for fac in self._source.getPageFactories():
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173 post = fac.buildPage()
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174 tax_values = post.config.get(tax_name)
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175 if tax_values is None:
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176 continue
3
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177 if not isinstance(tax_values, list):
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178 tax_values = [tax_values]
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179 for val in tax_values:
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180 posts_by_tax_value.setdefault(val, [])
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181 posts_by_tax_value[val].append(post)
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182
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183 entries = []
5
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184 for value, ds in posts_by_tax_value.items():
3
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185 source = ArraySource(self._page.app, ds)
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186 entries.append(BlogTaxonomyEntry(self._page, source, value))
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187 self._taxonomies[tax_name] = sorted(entries, key=lambda k: k.name)
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188
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189 self._onIteration()
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190 return self._taxonomies[tax_name]
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191
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192 def _onIteration(self):
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193 if not self._ctx_set:
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194 eis = self._page.app.env.exec_info_stack
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195 eis.current_page_info.render_ctx.used_source_names.add(
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196 self._source.name)
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197 self._ctx_set = True
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198
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199
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200 class BlogArchiveEntry(object):
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201 def __init__(self, page, name, timestamp):
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202 self.name = name
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203 self.timestamp = timestamp
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204 self._page = page
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205 self._data_source = []
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206 self._iterator = None
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207
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208 def __str__(self):
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209 return self.name
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210
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211 @property
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212 def posts(self):
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213 self._load()
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214 self._iterator.reset()
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215 return self._iterator
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216
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217 def _load(self):
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218 if self._iterator is not None:
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219 return
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220 source = ArraySource(self._page.app, self._data_source)
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221 self._iterator = PageIterator(source, current_page=self._page)
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222
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223
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224 class BlogTaxonomyEntry(object):
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225 def __init__(self, page, source, property_value):
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226 self._page = page
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227 self._source = source
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228 self._property_value = property_value
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229 self._iterator = None
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230
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231 def __str__(self):
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232 return self._property_value
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233
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234 @property
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235 def name(self):
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236 return self._property_value
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237
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238 @property
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239 def posts(self):
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240 self._load()
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241 self._iterator.reset()
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242 return self._iterator
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243
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244 @property
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245 def post_count(self):
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246 return self._source.page_count
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247
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248 def _load(self):
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diff changeset
249 if self._iterator is not None:
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diff changeset
250 return
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parents:
diff changeset
251
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252 self._iterator = PageIterator(self._source, self._page)
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253