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annotate piecrust/dataproviders/base.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
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children 08e02c2a2a1a
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f070a4fc033c core: Continue PieCrust3 refactor, simplify pages.
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1 from piecrust.configuration import ConfigurationError
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4 class UnsupportedWrappedDataProviderError(Exception):
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5 pass
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8 class DataProvider:
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9 """ The base class for a data provider.
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10 """
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11 PROVIDER_NAME = None
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12
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13 debug_render_dynamic = []
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14 debug_render_invoke_dynamic = []
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16 def __init__(self, source):
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17 self._source = source
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18
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19 def _wrapDataProvider(self, provider):
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20 raise UnsupportedWrappedDataProviderError()
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21
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23 def get_data_provider_class(app, provider_type):
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24 if not provider_type:
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25 raise Exception("No data provider type specified.")
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26 for prov in app.plugin_loader.getDataProviders():
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27 if prov.PROVIDER_NAME == provider_type:
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28 return prov
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29 raise ConfigurationError(
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30 "Unknown data provider type: %s" % provider_type)
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