Add the ability to "rollup" values in a time series #554
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Another prerequisite PR for #543 that aims to make it much easier to work with time series and aggregated data.
Overview
This PR introduces two important domain concepts:
TimeSeries
+TimeSeries::Value
ValueGroup
Time Series Data
Maybe will be presenting user data in a time series format often. The
TimeSeries
model accepts an array ofTimeSeries::Value
objects, which have adate
andvalue
. This is a generic domain concept that works with numeric and money values:It also works with collections via the
from_collection
class method:Value Groups
The purpose of value groups is to recursively "roll up" both individual values and time series arrays based on an arbitrary hierarchy. For example, we can create a hierarchy of assets: