def __new__(mcs, name, bases, attrs):
binding = ConcretePyGlassModelsMeta._engines.get(name)
if binding is None:
# Retrieve the database URL from the __init__.py for the package in which the model class
# resides.
try:
module = attrs['__module__']
package = module[:module.rfind('.')]
res = __import__(package, globals(), locals(), [StringUtils.toStr2('DATABASE_URL')])
except Exception as err:
PyGlassModelUtils.logger.writeError([
'ERROR: Unable to initialize model',
'NAME: %s' % name ])
raise
try:
sourceUrl = getattr(res, 'DATABASE_URL')
except Exception as err:
PyGlassModelUtils.logger.writeError([
'ERROR: Unable to get DATABASE_URL from %s.__init__.py' % package,
'NAME: %s' % name ], err)
raise
try:
url = PyGlassModelUtils.getEngineUrl(sourceUrl)
except Exception as err:
PyGlassModelUtils.logger.writeError([
'ERROR: Unable to get url from database url',
'DATABASE URL: ' + StringUtils.toUnicode(sourceUrl) ], err)
raise
try:
engine = create_engine(url, echo=False)
except Exception as err:
PyGlassModelUtils.logger.writeError([
'DATABASE FAILURE: Unable to create engine for database',
'URL: ' + StringUtils.toUnicode(url),
'NAME: ' + StringUtils.toUnicode(name)
], err)
raise
try:
Session = scoped_session(sessionmaker(bind=engine))
except Exception as err:
PyGlassModelUtils.logger.writeError([
'DATABASE FAILURE: Unable to create bound Session.',
'URL: ' + StringUtils.toUnicode(url),
'ENGINE: ' + StringUtils.toUnicode(engine)
], err)
raise
try:
Base = declarative_base(bind=engine)
except Exception as err:
PyGlassModelUtils.logger.writeError([
'DATABASE FAILURE: Unable to create database engine Base.',
'URL: ' + StringUtils.toUnicode(url),
'ENGINE: ' + StringUtils.toUnicode(engine)
], err)
raise
try:
Base.metadata.create_all(engine)
except Exception as err:
PyGlassModelUtils.logger.writeError([
'DATABASE FAILURE: Unable to create models.'
'URL: ' + StringUtils.toUnicode(url),
'ENGINE: ' + StringUtils.toUnicode(engine),
'BASE: ' + StringUtils.toUnicode(Base)
], err)
raise
binding = {
'engine':engine,
'SessionClass':Session,
'BaseClass':Base,
'url':url,
'databaseUrl':sourceUrl }
mcs._engines[name] = binding
attrs['ENGINE'] = binding['engine']
attrs['SESSION_CLASS'] = binding['SessionClass']
attrs['BASE'] = binding['BaseClass']
attrs['URL'] = binding['url']
attrs['MODEL_NAME'] = name
attrs['DATABASE_URL'] = binding['databaseUrl']
attrs['BINDING'] = binding
# Add the declarative base to inheritance
declaredBase = (binding['BaseClass'],)
try:
bases = bases + declaredBase
except Exception as err:
bases = declaredBase
out = AbstractPyGlassModelsMeta.__new__(mcs, name, bases, attrs)
return out
attrs['SESSION_CLASS'] = binding['SessionClass']
attrs['BASE'] = binding['BaseClass']
attrs['URL'] = binding['url']
attrs['MODEL_NAME'] = name
attrs['DATABASE_URL'] = binding['databaseUrl']
attrs['BINDING'] = binding
# Add the declarative base to inheritance
declaredBase = (binding['BaseClass'],)
try:
bases = bases + declaredBase
except Exception, err:
bases = declaredBase
out = AbstractPyGlassModelsMeta.__new__(mcs, name, bases, attrs)
return out
#===================================================================================================
# P U B L I C
#___________________________________________________________________________________________________ createSession
def createSession(cls):
return cls.SESSION_CLASS()
#___________________________________________________________________________________________________ query
def query(cls, session, modelFilter =None, modelOrderBy =None, limit =None, offset =None,
joinModels =None):
query = cls.createQuery(session)
if joinModels is not None:
for model in joinModels:
