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django-chartjs

A simple Django + charts.js implementation (early 2019)

Brief: ~200 members submit quarterly figures. Provide insight / data visualisation / charts to admins

Rationale: Submission every quarter / client already has a standard dataset they extract every quarter, so run preset queries at submission close; process and store the results in database to reduce computing.

Model:

Chart -< DataSet -< Entry

Pretty simple (Chart can have 1+ related DataSets, which are composed of 1+ related Entries)

View:

ChartSerialiser() - ready data before it's sent to database as JSON

AdminGraphView() - retrieve stored data and send to front-end

Serializers:

Pre-configured settings for consistancy between generated charts and chart customisation

ChartSerializer(Serializer) - convert data into the format required by chartjs package

  • title, charty_type and data

  • to_representation()

  • apply specific options based on chart type, colours, standard settings

  • generate chart selector

  • return chart