42 lines
1.8 KiB
Python
42 lines
1.8 KiB
Python
"""
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This is the core database connection.
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All CMS code assumes database SELECT statements cast the resulting values as such:
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* booleans are mapped to Python booleans
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* dates are mapped to Python datetime.date objects
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* times are mapped to Python datetime.time objects
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* timestamps are mapped to Python datetime.datetime objects
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Right now, we're handling this by using psycopg's custom typecast definitions.
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If we move to a different database module, we should ensure that it either
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performs the appropriate typecasting out of the box, or that it has hooks that
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let us do that.
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"""
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from django.conf.settings import DATABASE_ENGINE
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try:
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dbmod = __import__('django.core.db.backends.%s' % DATABASE_ENGINE, '', '', [''])
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except ImportError, exc:
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# The database backend wasn't found. Display a helpful error message
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# listing all possible database backends.
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from django.core.exceptions import ImproperlyConfigured
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import os
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backend_dir = os.path.join(__path__[0], 'backends')
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available_backends = [f[:-3] for f in os.listdir(backend_dir) if f.endswith('.py') and not f.startswith('__init__')]
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available_backends.sort()
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raise ImproperlyConfigured, "Could not load database backend: %s. Is your DATABASE_ENGINE setting (currently, %r) spelled correctly? Available options are: %s" % \
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(exc, DATABASE_ENGINE, ", ".join(map(repr, available_backends)))
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DatabaseError = dbmod.DatabaseError
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db = dbmod.DatabaseWrapper()
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dictfetchone = dbmod.dictfetchone
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dictfetchmany = dbmod.dictfetchmany
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dictfetchall = dbmod.dictfetchall
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dictfetchall = dbmod.dictfetchall
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get_last_insert_id = dbmod.get_last_insert_id
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get_date_extract_sql = dbmod.get_date_extract_sql
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get_date_trunc_sql = dbmod.get_date_trunc_sql
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OPERATOR_MAPPING = dbmod.OPERATOR_MAPPING
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DATA_TYPES = dbmod.DATA_TYPES
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