46 lines
1.4 KiB
Python
46 lines
1.4 KiB
Python
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import warnings
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import sqlalchemy
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def parse_version(v):
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"""
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Take a string version and conver it to a tuple (for easier comparison), e.g.:
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"1.2.3" --> (1, 2, 3)
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"1.2" --> (1, 2, 0)
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"1" --> (1, 0, 0)
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"""
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parts = v.split(".")
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# Pad the list to make sure there is three elements so that we get major, minor, point
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# comparisons that default to "0" if not given. I.e. "1.2" --> (1, 2, 0)
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parts = (parts + 3 * ['0'])[:3]
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return tuple(int(x) for x in parts)
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def sqlalchemy_version(op, val):
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sa_ver = parse_version(sqlalchemy.__version__)
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target_ver = parse_version(val)
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assert op in ('<', '>', '<=', '>=', '=='), 'op {} not supported'.format(op)
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if op == '<':
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return sa_ver < target_ver
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if op == '>':
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return sa_ver > target_ver
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if op == '<=':
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return sa_ver <= target_ver
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if op == '>=':
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return sa_ver >= target_ver
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return sa_ver == target_ver
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def engine_config_warning(config, version, deprecated_config_key, engine_option):
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if config[deprecated_config_key] is not None:
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warnings.warn(
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'The `{}` config option is deprecated and will be removed in'
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' v{}. Use `SQLALCHEMY_ENGINE_OPTIONS[\'{}\']` instead.'
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.format(deprecated_config_key, version, engine_option),
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DeprecationWarning
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)
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