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Allow retrieval of project state at start of migrations
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@ -120,11 +120,14 @@ class MigrationGraph(object):
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def __str__(self):
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return "Graph: %s nodes, %s edges" % (len(self.nodes), sum(len(x) for x in self.dependencies.values()))
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def project_state(self, node):
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def project_state(self, node, at_end=True):
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"""
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Given a migration node, returns a complete ProjectState for it.
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If at_end is False, returns the state before the migration has run.
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"""
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plan = self.forwards_plan(node)
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if not at_end:
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plan = plan[:-1]
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project_state = ProjectState()
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for node in plan:
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project_state = self.nodes[node].mutate_state(project_state)
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