Reconstructors¶
BaseReconstructor¶
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class
cerami.reconstructor.BaseReconstructor¶ The base class for all Reconstructors
Reconstructors are used to interpret data from a DynamoDB response. All classes that inherit from BaseReconstructor implement
reconstruct()which takes in the DynamoDB data and manipulates it accordingly.For example, the ModelReconstructor converts the raw DynamoDB response data back into the Model of the corresponding table
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reconstruct(item_dict)¶ The abstract reconstruct method to be implemented by child classes
Its purpose it to convert the item_dict from DynamoDB
- Parameters
item_dict – a dict from DynamoDB. It will be in the format like
{"a_column": {"S": "my_value"}}- Raises
Exception – Not Implemented
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ModelReconstructor¶
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class
cerami.reconstructor.ModelReconstructor(model_cls)¶ A Reconstructor class to convert the DynamoDB response data back into a Model
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__init__(model_cls)¶ constructor for ModelReconstructor
- Parameters
model_cls – the class of the Model to convert the data into
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reconstruct(item_dict)¶ Convert the item_dict into a Model instance
Iterates over all columns in the model_cls and tries to set the value based on the item_dict’s keys
- Parameters
item_dict – a dict from DynamoDB. It will be in the format like
{"a_column": {"S": "my_value"}}- Returns
an instance of
model_cls
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