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annotate piecrust/dataproviders/blog.py @ 853:f070a4fc033c

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core: Continue PieCrust3 refactor, simplify pages. The asset pipeline is still the only function pipeline at this point. * No more `QualifiedPage`, and several other pieces of code deleted. * Data providers are simpler and more focused. For instance, the page iterator doesn't try to support other types of items. * Route parameters are proper known source metadata to remove the confusion between the two. * Make the baker and pipeline more correctly manage records and record histories. * Add support for record collapsing and deleting stale outputs in the asset pipeline.
author Ludovic Chabant <ludovic@chabant.com>
date Sun, 21 May 2017 00:06:59 -0700
parents
children 08e02c2a2a1a
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rev   line source
853
f070a4fc033c core: Continue PieCrust3 refactor, simplify pages.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
1 import time
f070a4fc033c core: Continue PieCrust3 refactor, simplify pages.
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2 import collections.abc
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3 from piecrust.dataproviders.base import DataProvider
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4 from piecrust.generation.taxonomy import Taxonomy
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5
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6
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7 class BlogDataProvider(DataProvider, collections.abc.Mapping):
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8 PROVIDER_NAME = 'blog'
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9
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10 debug_render_doc = """Provides a list of blog posts and yearly/monthly
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11 archives."""
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12 debug_render_dynamic = (['_debugRenderTaxonomies'] +
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13 DataProvider.debug_render_dynamic)
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14
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15 def __init__(self, source, page, override):
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16 super(BlogDataProvider, self).__init__(source, page, override)
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17 self._yearly = None
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18 self._monthly = None
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19 self._taxonomies = {}
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20 self._ctx_set = False
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21
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22 @property
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23 def posts(self):
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24 return self._posts()
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25
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26 @property
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27 def years(self):
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28 return self._buildYearlyArchive()
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29
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30 @property
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31 def months(self):
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32 return self._buildMonthlyArchive()
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33
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34 def __getitem__(self, name):
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35 if name == 'posts':
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36 return self._posts()
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37 elif name == 'years':
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38 return self._buildYearlyArchive()
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39 elif name == 'months':
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40 return self._buildMonthlyArchive()
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41
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42 if self._source.app.config.get('site/taxonomies/' + name) is not None:
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43 return self._buildTaxonomy(name)
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44
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45 raise KeyError("No such item: %s" % name)
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46
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47 def __iter__(self):
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48 keys = ['posts', 'years', 'months']
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49 keys += list(self._source.app.config.get('site/taxonomies').keys())
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50 return iter(keys)
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51
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52 def __len__(self):
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53 return 3 + len(self._source.app.config.get('site/taxonomies'))
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54
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55 def _debugRenderTaxonomies(self):
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56 return list(self._source.app.config.get('site/taxonomies').keys())
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57
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58 def _posts(self):
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59 it = PageIterator(self._source, current_page=self._page)
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60 it._iter_event += self._onIteration
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61 return it
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62
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63 def _buildYearlyArchive(self):
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64 if self._yearly is not None:
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65 return self._yearly
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66
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67 self._yearly = []
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68 yearly_index = {}
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69 for post in self._source.getPages():
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70 year = post.datetime.strftime('%Y')
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71
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72 posts_this_year = yearly_index.get(year)
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73 if posts_this_year is None:
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74 timestamp = time.mktime(
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75 (post.datetime.year, 1, 1, 0, 0, 0, 0, 0, -1))
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76 posts_this_year = BlogArchiveEntry(self._page, year, timestamp)
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77 self._yearly.append(posts_this_year)
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78 yearly_index[year] = posts_this_year
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79
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80 posts_this_year._data_source.append(post)
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81 self._yearly = sorted(self._yearly,
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82 key=lambda e: e.timestamp,
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83 reverse=True)
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84 self._onIteration()
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85 return self._yearly
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86
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87 def _buildMonthlyArchive(self):
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88 if self._monthly is not None:
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89 return self._monthly
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90
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91 self._monthly = []
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92 for post in self._source.getPages():
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93 month = post.datetime.strftime('%B %Y')
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94
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95 posts_this_month = next(
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96 filter(lambda m: m.name == month, self._monthly),
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97 None)
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98 if posts_this_month is None:
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99 timestamp = time.mktime(
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100 (post.datetime.year, post.datetime.month, 1,
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101 0, 0, 0, 0, 0, -1))
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102 posts_this_month = BlogArchiveEntry(self._page, month, timestamp)
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103 self._monthly.append(posts_this_month)
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104
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105 posts_this_month._data_source.append(post)
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106 self._monthly = sorted(self._monthly,
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107 key=lambda e: e.timestamp,
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108 reverse=True)
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109 self._onIteration()
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110 return self._monthly
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111
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112 def _buildTaxonomy(self, tax_name):
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113 if tax_name in self._taxonomies:
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114 return self._taxonomies[tax_name]
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115
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116 tax_cfg = self._page.app.config.get('site/taxonomies/' + tax_name)
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117 tax = Taxonomy(tax_name, tax_cfg)
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118
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119 posts_by_tax_value = {}
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120 for post in self._source.getPages():
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121 tax_values = post.config.get(tax.setting_name)
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122 if tax_values is None:
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123 continue
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124 if not isinstance(tax_values, list):
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125 tax_values = [tax_values]
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126 for val in tax_values:
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127 posts = posts_by_tax_value.setdefault(val, [])
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128 posts.append(post)
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129
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130 entries = []
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131 for value, ds in posts_by_tax_value.items():
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132 source = ArraySource(self._page.app, ds)
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133 entries.append(BlogTaxonomyEntry(self._page, source, value))
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134 self._taxonomies[tax_name] = sorted(entries, key=lambda k: k.name)
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135
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136 self._onIteration()
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137 return self._taxonomies[tax_name]
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138
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139 def _onIteration(self):
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140 if not self._ctx_set:
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Ludovic Chabant <ludovic@chabant.com>
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141 eis = self._page.app.env.exec_info_stack
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142 if eis.current_page_info:
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143 eis.current_page_info.render_ctx.addUsedSource(self._source)
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144 self._ctx_set = True
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145
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146
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Ludovic Chabant <ludovic@chabant.com>
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147 class BlogArchiveEntry(object):
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148 debug_render = ['name', 'timestamp', 'posts']
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149 debug_render_invoke = ['name', 'timestamp', 'posts']
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150
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151 def __init__(self, page, name, timestamp):
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152 self.name = name
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153 self.timestamp = timestamp
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154 self._page = page
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Ludovic Chabant <ludovic@chabant.com>
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155 self._data_source = []
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Ludovic Chabant <ludovic@chabant.com>
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156 self._iterator = None
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157
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158 def __str__(self):
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159 return self.name
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160
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161 def __int__(self):
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162 return int(self.name)
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163
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164 @property
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Ludovic Chabant <ludovic@chabant.com>
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165 def posts(self):
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Ludovic Chabant <ludovic@chabant.com>
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166 self._load()
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Ludovic Chabant <ludovic@chabant.com>
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167 self._iterator.reset()
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Ludovic Chabant <ludovic@chabant.com>
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168 return self._iterator
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169
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170 def _load(self):
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Ludovic Chabant <ludovic@chabant.com>
parents:
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171 if self._iterator is not None:
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Ludovic Chabant <ludovic@chabant.com>
parents:
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172 return
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Ludovic Chabant <ludovic@chabant.com>
parents:
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173 source = ArraySource(self._page.app, self._data_source)
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parents:
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174 self._iterator = PageIterator(source, current_page=self._page)
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parents:
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175
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176
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Ludovic Chabant <ludovic@chabant.com>
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177 class BlogTaxonomyEntry(object):
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178 debug_render = ['name', 'post_count', 'posts']
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parents:
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179 debug_render_invoke = ['name', 'post_count', 'posts']
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parents:
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180
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181 def __init__(self, page, source, property_value):
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182 self._page = page
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Ludovic Chabant <ludovic@chabant.com>
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183 self._source = source
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Ludovic Chabant <ludovic@chabant.com>
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184 self._property_value = property_value
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185 self._iterator = None
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parents:
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186
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187 def __str__(self):
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188 return self._property_value
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parents:
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189
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parents:
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190 @property
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Ludovic Chabant <ludovic@chabant.com>
parents:
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191 def name(self):
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Ludovic Chabant <ludovic@chabant.com>
parents:
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192 return self._property_value
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parents:
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193
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parents:
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194 @property
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Ludovic Chabant <ludovic@chabant.com>
parents:
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195 def posts(self):
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Ludovic Chabant <ludovic@chabant.com>
parents:
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196 self._load()
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Ludovic Chabant <ludovic@chabant.com>
parents:
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197 self._iterator.reset()
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
198 return self._iterator
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Ludovic Chabant <ludovic@chabant.com>
parents:
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199
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Ludovic Chabant <ludovic@chabant.com>
parents:
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200 @property
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Ludovic Chabant <ludovic@chabant.com>
parents:
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201 def post_count(self):
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
202 return self._source.page_count
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
203
f070a4fc033c core: Continue PieCrust3 refactor, simplify pages.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
204 def _load(self):
f070a4fc033c core: Continue PieCrust3 refactor, simplify pages.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
205 if self._iterator is not None:
f070a4fc033c core: Continue PieCrust3 refactor, simplify pages.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
206 return
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
207
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Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
208 self._iterator = PageIterator(self._source, current_page=self._page)
f070a4fc033c core: Continue PieCrust3 refactor, simplify pages.
Ludovic Chabant <ludovic@chabant.com>
parents:
diff changeset
209