Query is not consistent -- sometimes get an error if I change the parameter

[angelacode]

Issue

Please explain this issue you're encountering to the best of your ability.

Reproduction

[47] pry(#<BotResponse>)> e = Event.where.has {(keyword == 'daily_check') & (recurring == 'true') & (time_of_day == '8am')}
=> [#<Event:0x00000003f3eca8
  id: 15,
  bot_client_id: "aiaas-1409611358153-user-0147",
  keyword: "daily_check",
  topic: nil,
  status: "active",
  channel: "telegram",
  created_date: 2017-05-08 00:24:32 UTC,
  tickle_expression: "daily",
  time_of_day: "8am",
  next_occurrence: 2017-05-14 15:00:00 UTC,
  time_zone: nil,
  recurring: true>]
[48] pry(#<BotResponse>)> e.count
=> 1

[49] pry(#<BotResponse>)> e = Event.where.has {(bot_client_id == 'daily_check') & (recurring == 'true') & (time_of_day == '8am')}
=> #<Event::ActiveRecord_Relation:0x1ec6034>
[50] pry(#<BotResponse>)> e.count
RuntimeError: unsupported: FalseClass
from /usr/local/rvm/gems/ruby-2.2.1/gems/arel-6.0.4/lib/arel/visitors/to_sql.rb:736:in `unsupported'

I'm not sure why there should be a difference:

ActiveRecord::Schema.define do
	  unless ActiveRecord::Base.connection.tables.include? 'events'
	    create_table :events do |table|

	    	table.column :bot_client_id, 			:string

	    	table.column :keyword, 					:string
	    	table.column :topic, 					:string
	    	table.column :status, 					:string
	    	table.column :channel, 					:string

	    	table.column :created_date,             :datetime
	      	table.column :tickle_expression,        :string
	      	table.column :time_of_day,              :string
	      	table.column :next_occurrence,			:datetime
	      	table.column :time_zone,				:string
	      	table.column :recurring,				:boolean
	    end
	  end

	end

[rzane]

@angelacode, I didn't see this issue! Sorry!

I'm not able to reproduce this issue. Could you fill out the issue template?