43 lines
1.3 KiB
Python
43 lines
1.3 KiB
Python
from migrate.versioning.base import log,operations
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from migrate.versioning import pathed,exceptions
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import migrate.run
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class BaseScript(pathed.Pathed):
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"""Base class for other types of scripts
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All scripts have the following properties:
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source (script.source())
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The source code of the script
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version (script.version())
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The version number of the script
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operations (script.operations())
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The operations defined by the script: upgrade(), downgrade() or both.
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Returns a tuple of operations.
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Can also check for an operation with ex. script.operation(Script.ops.up)
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"""
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def __init__(self,path):
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log.info('Loading script %s...'%path)
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self.verify(path)
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super(BaseScript,self).__init__(path)
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log.info('Script %s loaded successfully'%path)
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@classmethod
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def verify(cls,path):
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"""Ensure this is a valid script, or raise InvalidScriptError
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This version simply ensures the script file's existence
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"""
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try:
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cls.require_found(path)
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except:
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raise exceptions.InvalidScriptError(path)
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def source(self):
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fd=open(self.path)
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ret=fd.read()
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fd.close()
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return ret
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def run(self,engine):
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raise NotImplementedError()
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