ArelHash

ArelHash is a library that offers some utilities for serializing/deserializing Arel expressions into/from hashes. At the heart of the where part of such an ArelHash expression, we have core expressions in the form of:

{ <predication>: { <left_operand> => <right_operand> } }

with operand being a 'column name' if it is a symbol, or a constant otherwise.

These expressions can be combined using OR and/or AND:

{ or: [ <subexpression>, <subexpression>, ... ] }
{ and: [ <subexpression>, <subexpression>, ... ] }