Mercurial > piecrust2

annotate piecrust/data/base.py @ 371:c2ca72fb7f0b 2.0.0a8

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caching: Use separate caches for config variants and other contexts. * The `_cache` directory is now organized in multiple "sub-caches" for different contexts. * A new context is created when config variants or overrides are applied. * `serve` context uses a different context that the other commends, to prevent the `bake` command's output from messing up the preview server (e.g. with how asset URLs are generated differently between the two). * Fix a few places where the cache directory was referenced directly.
author Ludovic Chabant <ludovic@chabant.com>
date Sun, 03 May 2015 23:59:46 -0700
parents 4b1019bb2533
children 4c9eab0e283b
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
369
4b1019bb2533 serve: Giant refactor to change how we handle data when serving pages.
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diff changeset
1 import copy
3
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2 import time
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3 import logging
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4 from piecrust.data.assetor import Assetor
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5 from piecrust.uriutil import split_uri
3
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6
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7
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8 logger = logging.getLogger(__name__)
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9
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10
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11 class LazyPageConfigData(object):
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12 """ An object that represents the configuration header of a page,
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13 but also allows for additional data. It's meant to be exposed
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14 to the templating system.
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15 """
12
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16 debug_render = []
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17 debug_render_dynamic = ['_debugRenderKeys']
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18
3
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19 def __init__(self, page):
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20 self._page = page
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21 self._values = None
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22 self._loaders = None
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23
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24 @property
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25 def page(self):
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26 return self._page
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27
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28 def get(self, name):
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29 try:
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30 return self._getValue(name)
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31 except KeyError:
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32 return None
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33
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34 def __getattr__(self, name):
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35 try:
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36 return self._getValue(name)
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37 except KeyError:
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38 raise AttributeError
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39
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40 def __getitem__(self, name):
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41 return self._getValue(name)
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42
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43 def _getValue(self, name):
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44 self._load()
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45
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46 if self._loaders:
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47 loader = self._loaders.get(name)
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48 if loader is not None:
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49 try:
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50 self._values[name] = loader(self, name)
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51 except Exception as ex:
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52 raise Exception(
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53 "Error while loading attribute '%s' for: %s" %
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54 (name, self._page.rel_path)) from ex
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55
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56 # We need to double-check `_loaders` here because
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57 # the loader could have removed all loaders, which
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58 # would set this back to `None`.
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59 if self._loaders is not None:
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60 del self._loaders[name]
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61 if len(self._loaders) == 0:
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62 self._loaders = None
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63
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64 elif name not in self._values:
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65 loader = self._loaders.get('*')
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66 if loader is not None:
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67 try:
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68 self._values[name] = loader(self, name)
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69 except Exception as ex:
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70 raise Exception(
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71 "Error while loading attirbute '%s' for: %s" %
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72 (name, self._page.rel_path)) from ex
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73
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74 return self._values[name]
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75
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76 def _setValue(self, name, value):
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77 if self._values is None:
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78 raise Exception("Can't call _setValue before this data has been "
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79 "loaded")
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80 self._values[name] = value
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81
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82 def mapLoader(self, attr_name, loader):
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83 if loader is None:
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84 if self._loaders is None or attr_name not in self._loaders:
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85 return
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86 del self._loaders[attr_name]
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87 if len(self._loaders) == 0:
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88 self._loaders = None
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89 return
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90
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91 if self._loaders is None:
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92 self._loaders = {}
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93 if attr_name in self._loaders:
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94 raise Exception(
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95 "A loader has already been mapped for: %s" % attr_name)
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96 self._loaders[attr_name] = loader
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97
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98 def _load(self):
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99 if self._values is not None:
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100 return
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101 self._values = self._page.config.getDeepcopy(self._page.app.debug)
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102 try:
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103 self._loadCustom()
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104 except Exception as ex:
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105 raise Exception(
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106 "Error while loading data for: %s" %
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107 self._page.rel_path) from ex
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108
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109 def _loadCustom(self):
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110 pass
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111
12
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112 def _debugRenderKeys(self):
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113 self._load()
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114 keys = set(self._values.keys())
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115 if self._loaders:
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116 keys |= set(self._loaders.keys())
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117 return list(keys)
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118
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119
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120 class PaginationData(LazyPageConfigData):
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121 def __init__(self, page):
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122 super(PaginationData, self).__init__(page)
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123 self._route = None
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124 self._route_metadata = None
3
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125
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126 def _get_uri(self):
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127 page = self._page
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128 if self._route is None:
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129 # TODO: this is not quite correct, as we're missing parts of the
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130 # route metadata if the current page is a taxonomy page.
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131 self._route = page.app.getRoute(page.source.name,
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132 page.source_metadata)
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133 self._route_metadata = copy.deepcopy(page.source_metadata)
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134 if self._route is None:
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135 raise Exception("Can't get route for page: %s" % page.path)
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136 return self._route.getUri(self._route_metadata, provider=page)
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137
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138 def _loadCustom(self):
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139 page_url = self._get_uri()
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140 _, slug = split_uri(self.page.app, page_url)
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141 self._setValue('url', page_url)
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142 self._setValue('slug', slug)
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143 self._setValue(
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144 'timestamp',
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145 time.mktime(self.page.datetime.timetuple()))
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146 date_format = self.page.app.config.get('site/date_format')
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147 if date_format:
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148 self._setValue('date', self.page.datetime.strftime(date_format))
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149
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150 assetor = Assetor(self.page, page_url)
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151 self._setValue('assets', assetor)
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152
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153 segment_names = self.page.config.get('segments')
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154 for name in segment_names:
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155 self.mapLoader(name, self._load_rendered_segment)
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156
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157 def _load_rendered_segment(self, data, name):
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158 do_render = True
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159 eis = self._page.app.env.exec_info_stack
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160 if eis is not None and eis.hasPage(self._page):
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161 # This is the pagination data for the page that is currently
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162 # being rendered! Inception! But this is possible... so just
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163 # prevent infinite recursion.
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164 do_render = False
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165
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166 assert self is data
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167
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168 if do_render:
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169 uri = self._get_uri()
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170 try:
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171 from piecrust.rendering import (
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172 QualifiedPage, PageRenderingContext,
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173 render_page_segments)
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174 qp = QualifiedPage(self._page, self._route,
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175 self._route_metadata)
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176 ctx = PageRenderingContext(qp)
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177 segs = render_page_segments(ctx)
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178 except Exception as e:
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179 raise Exception(
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180 "Error rendering segments for '%s'" % uri) from e
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181 else:
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182 segs = {}
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183 for name in self.page.config.get('segments'):
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184 segs[name] = "<unavailable: current page>"
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185
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186 for k, v in segs.items():
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187 self.mapLoader(k, None)
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188 self._setValue(k, v)
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189
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190 if 'content.abstract' in segs:
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191 self._setValue('content', segs['content.abstract'])
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192 self._setValue('has_more', True)
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193 if name == 'content':
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194 return segs['content.abstract']
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195
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196 return segs[name]
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197