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annotate piecrust/data/provider.py @ 111:208c652551a3

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Quick fix for making the server correctly update referenced pages. Disable the file-system cache for rendered segments when in server mode. We can bring this optimization back when we're actually using the baking record in the server too in order to know dependencies.
author Ludovic Chabant <ludovic@chabant.com>
date Thu, 16 Oct 2014 17:03:42 -0700
parents 923699e816d0
children 371a6c879ab9
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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:
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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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923699e816d0 Don't try to get the name of a source that doesn't have one.
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73 eis.current_page_info.render_ctx.addUsedSource(self._source.name)
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74 self._ctx_set = True
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75
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76
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77 class BlogDataProvider(DataProvider):
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78 PROVIDER_NAME = 'blog'
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79
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80 debug_render_doc = """Provides a list of blog posts and yearly/monthly
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81 archives."""
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82 debug_render = ['posts', 'years', 'months']
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83 debug_render_dynamic = (['_debugRenderTaxonomies'] +
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84 DataProvider.debug_render_dynamic)
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85
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86 def __init__(self, source, page, user_data):
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87 super(BlogDataProvider, self).__init__(source, page, user_data)
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88 self._yearly = None
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89 self._monthly = None
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90 self._taxonomies = {}
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91 self._ctx_set = False
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92
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93 def __getattr__(self, name):
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94 if self._source.app.getTaxonomy(name) is not None:
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95 return self._buildTaxonomy(name)
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96 return super(BlogDataProvider, self).__getattr__(name)
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97
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98 @property
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99 def posts(self):
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100 it = PageIterator(self._source, current_page=self._page)
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101 it._iter_event += self._onIteration
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102 return it
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103
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104 @property
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105 def years(self):
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106 return self._buildYearlyArchive()
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107
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108 @property
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109 def months(self):
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110 return self._buildMonthlyArchive()
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111
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112 def _debugRenderTaxonomies(self):
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113 return [t.name for t in self._source.app.taxonomies]
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114
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115 def _buildYearlyArchive(self):
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116 if self._yearly is not None:
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117 return self._yearly
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118
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119 self._yearly = []
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120 for fac in self._source.getPageFactories():
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121 post = fac.buildPage()
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122 year = post.datetime.strftime('%Y')
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123
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124 posts_this_year = next(
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125 filter(lambda y: y.name == year, self._yearly),
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126 None)
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127 if posts_this_year is None:
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128 timestamp = time.mktime(
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129 (post.datetime.year, 1, 1, 0, 0, 0, 0, 0, -1))
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130 posts_this_year = BlogArchiveEntry(self._page, year, timestamp)
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131 self._yearly.append(posts_this_year)
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132
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133 posts_this_year._data_source.append(post)
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134 self._yearly = sorted(self._yearly,
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135 key=lambda e: e.timestamp,
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136 reverse=True)
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137 self._onIteration()
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138 return self._yearly
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139
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140 def _buildMonthlyArchive(self):
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141 if self._monthly is not None:
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142 return self._monthly
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143
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144 self._monthly = []
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145 for fac in self._source.getPageFactories():
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146 post = fac.buildPage()
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147 month = post.datetime.strftime('%B %Y')
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148
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149 posts_this_month = next(
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150 filter(lambda m: m.name == month, self._monthly),
3
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151 None)
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152 if posts_this_month is None:
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153 timestamp = time.mktime(
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154 (post.datetime.year, post.datetime.month, 1,
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155 0, 0, 0, 0, 0, -1))
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156 posts_this_month = BlogArchiveEntry(self._page, month, timestamp)
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157 self._monthly.append(posts_this_month)
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158
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159 posts_this_month._data_source.append(post)
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160 self._monthly = sorted(self._monthly,
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161 key=lambda e: e.timestamp,
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162 reverse=True)
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163 self._onIteration()
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164 return self._monthly
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165
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166 def _buildTaxonomy(self, tax_name):
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167 if tax_name in self._taxonomies:
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168 return self._taxonomies[tax_name]
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169
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170 posts_by_tax_value = {}
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171 for fac in self._source.getPageFactories():
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172 post = fac.buildPage()
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173 tax_values = post.config.get(tax_name)
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174 if tax_values is None:
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175 continue
3
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176 if not isinstance(tax_values, list):
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177 tax_values = [tax_values]
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178 for val in tax_values:
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179 posts_by_tax_value.setdefault(val, [])
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180 posts_by_tax_value[val].append(post)
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181
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182 entries = []
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183 for value, ds in posts_by_tax_value.items():
3
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184 source = ArraySource(self._page.app, ds)
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185 entries.append(BlogTaxonomyEntry(self._page, source, value))
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186 self._taxonomies[tax_name] = sorted(entries, key=lambda k: k.name)
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187
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188 self._onIteration()
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189 return self._taxonomies[tax_name]
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190
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191 def _onIteration(self):
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192 if not self._ctx_set:
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193 eis = self._page.app.env.exec_info_stack
23
923699e816d0 Don't try to get the name of a source that doesn't have one.
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diff changeset
194 eis.current_page_info.render_ctx.addUsedSource(self._source)
3
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195 self._ctx_set = True
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196
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197
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198 class BlogArchiveEntry(object):
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199 def __init__(self, page, name, timestamp):
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200 self.name = name
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201 self.timestamp = timestamp
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202 self._page = page
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203 self._data_source = []
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204 self._iterator = None
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205
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206 def __str__(self):
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207 return self.name
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208
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209 @property
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210 def posts(self):
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211 self._load()
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212 self._iterator.reset()
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213 return self._iterator
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214
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215 def _load(self):
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216 if self._iterator is not None:
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217 return
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diff changeset
218 source = ArraySource(self._page.app, self._data_source)
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219 self._iterator = PageIterator(source, current_page=self._page)
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220
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221
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222 class BlogTaxonomyEntry(object):
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223 def __init__(self, page, source, property_value):
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224 self._page = page
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225 self._source = source
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226 self._property_value = property_value
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227 self._iterator = None
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228
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229 def __str__(self):
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230 return self._property_value
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231
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232 @property
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233 def name(self):
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234 return self._property_value
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235
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236 @property
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237 def posts(self):
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238 self._load()
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239 self._iterator.reset()
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240 return self._iterator
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241
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242 @property
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243 def post_count(self):
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244 return self._source.page_count
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245
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246 def _load(self):
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247 if self._iterator is not None:
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248 return
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249
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diff changeset
250 self._iterator = PageIterator(self._source, self._page)
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251