Pivots [WIP]

[jasper-lyons]

Here is an initial implementation of allowing users to add pivots to their queries via the sunpot search api.

Some major additions so far

• Pivot api added to searches. This allows queries like:

  Model.search do
      facet :created_at,
          tag: :per_month,
          range: from..to,
          range_interval: '+1MONTH',
          minimum_count: -1
  
      pivot :owned_by_location,
          range: :per_month,
          minimum_count: -1
  end

• Adapted the range facet to support date ranges. This is required to support pivoting over date ranges. See here

I am currently lacking:

• tests
• documentation
• full implementation

Others could help by:

• reviewing the code and suggesting changes
• adding or suggesting tests
• documenting methods
• updating existing documentation or making suggestions as to how docs can could change
• Identifying other aspects of pivots that should be implemented.

[anikett-rpx]

I believe fields should be in last because you are expecting more than 1 values.
def initialize(pivot, setup, fields).

[jasper-lyons]

Hey @anikett-rpx, thanks for the comment!

Could you give me an example of what you mean? fields should be an explicit array of field names, entered like .new([:field1, :field2, ...], ...).