Merge "Fix loading 'block_device_mapping' info error"
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@ -203,7 +203,8 @@ class NovaEngine(engine.BackupEngine):
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image = self.glance.images.get(image_id)
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image_block_mapping_info = image.get("block_device_mapping")
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image_block_mapping = json.loads(image_block_mapping_info)
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image_block_mapping = json.loads(image_block_mapping_info) \
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if image_block_mapping_info else None
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image_temporary_snapshot_id = \
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image_block_mapping[0]['snapshot_id'] \
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if image_block_mapping else None
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