Mercurial > piecrust2

annotate piecrust/data/base.py @ 238:4dce0e61b48c

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internal: Fix bug with the default source when listing `/` path.
author Ludovic Chabant <ludovic@chabant.com>
date Sun, 15 Feb 2015 22:47:46 -0800
parents eaf18442bff8
children f130365568ff
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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 import logging
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3 from piecrust.data.assetor import Assetor
12
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4 from piecrust.uriutil import get_slug
3
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5
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6
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7 logger = logging.getLogger(__name__)
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8
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9
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f5ca5c5bed85 More Python 3 fixes, modularization, and new unit tests.
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10 class IPaginationSource(object):
12
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11 """ Defines the interface for a source that can be used as the data
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12 for an iterator or a pagination.
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13 """
6
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14 def getItemsPerPage(self):
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15 raise NotImplementedError()
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16
f5ca5c5bed85 More Python 3 fixes, modularization, and new unit tests.
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17 def getSourceIterator(self):
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18 raise NotImplementedError()
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19
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20 def getSorterIterator(self, it):
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21 raise NotImplementedError()
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22
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23 def getTailIterator(self, it):
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24 raise NotImplementedError()
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25
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26 def getPaginationFilter(self, page):
f5ca5c5bed85 More Python 3 fixes, modularization, and new unit tests.
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27 raise NotImplementedError()
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28
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29 def getSettingAccessor(self):
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30 raise NotImplementedError()
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31
6
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32
3
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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33 class LazyPageConfigData(object):
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34 """ An object that represents the configuration header of a page,
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35 but also allows for additional data. It's meant to be exposed
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36 to the templating system.
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37 """
12
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38 debug_render = []
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39 debug_render_dynamic = ['_debugRenderKeys']
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40
3
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41 def __init__(self, page):
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42 self._page = page
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43 self._values = None
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44 self._loaders = None
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45
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46 @property
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47 def page(self):
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48 return self._page
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49
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50 def get(self, name):
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51 try:
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52 return self._getValue(name)
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53 except KeyError:
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54 return None
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55
12
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56 def __getattr__(self, name):
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57 try:
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58 return self._getValue(name)
12
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59 except KeyError:
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60 raise AttributeError
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61
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62 def __getitem__(self, name):
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63 return self._getValue(name)
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64
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65 def _getValue(self, name):
3
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66 self._load()
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67
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68 if self._loaders:
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69 loader = self._loaders.get(name)
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70 if loader is not None:
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71 try:
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72 self._values[name] = loader(self, name)
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73 except Exception as ex:
158
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74 raise Exception(
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75 "Error while loading attribute '%s' for: %s" %
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76 (name, self._page.rel_path)) from ex
3
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77
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78 # We need to double-check `_loaders` here because
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79 # the loader could have removed all loaders, which
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80 # would set this back to `None`.
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81 if self._loaders is not None:
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82 del self._loaders[name]
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83 if len(self._loaders) == 0:
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84 self._loaders = None
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85
236
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86 elif name not in self._values:
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87 loader = self._loaders.get('*')
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88 if loader is not None:
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89 try:
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90 self._values[name] = loader(self, name)
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91 except Exception as ex:
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92 raise Exception(
eaf18442bff8 internal: Add support for "wildcard" loader in `LazyPageConfigData`.
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93 "Error while loading attirbute '%s' for: %s" %
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94 (name, self._page.rel_path)) from ex
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95
3
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96 return self._values[name]
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97
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98 def _setValue(self, name, value):
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99 if self._values is None:
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100 raise Exception("Can't call _setValue before this data has been "
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101 "loaded")
3
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102 self._values[name] = value
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103
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104 def mapLoader(self, attr_name, loader):
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105 if loader is None:
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106 if self._loaders is None or attr_name not in self._loaders:
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107 return
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108 del self._loaders[attr_name]
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109 if len(self._loaders) == 0:
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110 self._loaders = None
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111 return
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112
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113 if self._loaders is None:
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114 self._loaders = {}
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115 if attr_name in self._loaders:
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116 raise Exception(
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117 "A loader has already been mapped for: %s" % attr_name)
3
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118 self._loaders[attr_name] = loader
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119
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120 def _load(self):
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121 if self._values is not None:
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122 return
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123 self._values = dict(self._page.config.get())
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124 try:
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125 self._loadCustom()
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126 except Exception as ex:
158
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127 raise Exception(
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128 "Error while loading data for: %s" %
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129 self._page.rel_path) from ex
3
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130
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131 def _loadCustom(self):
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132 pass
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133
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134 def _debugRenderKeys(self):
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135 self._load()
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136 keys = set(self._values.keys())
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137 if self._loaders:
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138 keys |= set(self._loaders.keys())
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139 return list(keys)
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140
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141
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142 class PaginationData(LazyPageConfigData):
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143 def __init__(self, page):
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144 super(PaginationData, self).__init__(page)
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145
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146 def _get_uri(self):
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147 page = self._page
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148 route = page.app.getRoute(page.source.name, page.source_metadata)
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149 if route is None:
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150 raise Exception("Can't get route for page: %s" % page.path)
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151 return route.getUri(page.source_metadata, page)
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152
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153 def _loadCustom(self):
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154 page_url = self._get_uri()
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155 self._setValue('url', page_url)
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156 self._setValue('slug', get_slug(self._page.app, page_url))
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157 self._setValue(
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158 'timestamp',
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159 time.mktime(self.page.datetime.timetuple()))
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160 date_format = self.page.app.config.get('site/date_format')
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161 if date_format:
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162 self._setValue('date', self.page.datetime.strftime(date_format))
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163
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164 assetor = Assetor(self.page, page_url)
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165 self._setValue('assets', assetor)
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166
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167 segment_names = self.page.config.get('segments')
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168 for name in segment_names:
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169 self.mapLoader(name, self._load_rendered_segment)
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170
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171 def _load_rendered_segment(self, data, name):
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172 do_render = True
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173 eis = self._page.app.env.exec_info_stack
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174 if eis is not None and eis.hasPage(self._page):
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175 # This is the pagination data for the page that is currently
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176 # being rendered! Inception! But this is possible... so just
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177 # prevent infinite recursion.
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178 do_render = False
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179
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180 assert self is data
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181
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182 if do_render:
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183 uri = self._get_uri()
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184 try:
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185 from piecrust.rendering import (
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186 PageRenderingContext, render_page_segments)
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187 ctx = PageRenderingContext(self._page, uri)
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188 segs = render_page_segments(ctx)
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189 except Exception as e:
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190 raise Exception(
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191 "Error rendering segments for '%s'" % uri) from e
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192 else:
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193 segs = {}
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194 for name in self.page.config.get('segments'):
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195 segs[name] = "<unavailable: current page>"
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196
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197 for k, v in segs.items():
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198 self.mapLoader(k, None)
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199 self._setValue(k, v)
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200
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201 if 'content.abstract' in segs:
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202 self._setValue('content', segs['content.abstract'])
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203 self._setValue('has_more', True)
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204 if name == 'content':
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205 return segs['content.abstract']
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206
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207 return segs[name]
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208