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# frozen_string_literal: true
# Concern for querying columns with specific case sensitivity handling.
module CaseSensitivity
extend ActiveSupport::Concern
class_methods do
# Queries the given columns regardless of the casing used.
#
# Unlike other ActiveRecord methods this method only operates on a Hash.
def iwhere(params)
criteria = self
params.each do |column, value|
column = arel_table[column] unless column.is_a?(Arel::Attribute)
criteria = case value
when Array
criteria.where(value_in(column, value))
else
criteria.where(value_equal(column, value))
end
end
criteria
end
private
def value_equal(column, value)
lower_value = lower_value(value)
lower_column(column).eq(lower_value).to_sql
end
def value_in(column, values)
lower_values = values.map do |value|
lower_value(value)
end
lower_column(column).in(lower_values).to_sql
end
def lower_value(value)
Arel::Nodes::NamedFunction.new('LOWER', [Arel::Nodes.build_quoted(value)])
end
def lower_column(column)
column.lower
end
end
end
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