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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
Try looking in the code of this book. https://github.com/PacktPublishing/Django-3-by-Example/tree/master/Chapter09/myshop/coupons I hope that helps.
NOTE:
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