error.log

Gardener.joins(:support_visits).group(:gardener_id).select("SUM(CASE WHEN count(gardener_id) = 1 THEN 1 END) AS z
D, [2015-10-11T19:21:42.481818 #3] DEBUG -- :   Gardener Load (1.2ms)  SELECT SUM(CASE WHEN count(gardener_id) = 1 THEN 1 END) AS zero_count FROM "gardeners" INNER JOIN "support_visits" ON "support_visits"."gardener_id" = "gardeners"."id" GROUP BY gardener_id
PG::GroupingError: ERROR:  aggregate function calls cannot be nested
LINE 1: SELECT SUM(CASE WHEN count(gardener_id) = 1 THEN 1 END) AS z...
                             ^
: SELECT SUM(CASE WHEN count(gardener_id) = 1 THEN 1 END) AS zero_count FROM "gardeners" INNER JOIN "support_visits" ON "support_visits"."gardener_id" = "gardeners"."id" GROUP BY gardener_id
PG::GroupingError: ERROR:  aggregate function calls cannot be nested
LINE 1: SELECT SUM(CASE WHEN count(gardener_id) = 1 THEN 1 END) AS z...
                             ^
: SELECT SUM(CASE WHEN count(gardener_id) = 1 THEN 1 END) AS zero_count FROM "gardeners" INNER JOIN "support_visits" ON "support_visits"."gardener_id" = "gardeners"."id" GROUP BY gardener_id
ActiveRecord::StatementInvalid: PG::GroupingError: ERROR:  aggregate function calls cannot be nested
LINE 1: SELECT SUM(CASE WHEN count(gardener_id) = 1 THEN 1 END) AS z...
                             ^
: SELECT SUM(CASE WHEN count(gardener_id) = 1 THEN 1 END) AS zero_count FROM "gardeners" INNER JOIN "support_visits" ON "support_visits"."gardener_id" = "gardeners"."id" GROUP BY gardener_id
	from /app/vendor/bundle/ruby/2.1.0/gems/activerecord-4.1.4/lib/active_record/connection_adapters/postgresql_adapter.rb:822:in `async_exec'
	from /app/vendor/bundle/ruby/2.1.0/gems/activerecord-4.1.4/lib/active_record/connection_adapters/postgresql_adapter.rb:822:in `block in exec_no_cache'
	from /app/vendor/bundle/ruby/2.1.0/gems/activerecord-4.1.4/lib/active_record/connection_adapters/abstract_adapter.rb:373:in `block in log'
	from /app/vendor/bundle/ruby/2.1.0/gems/activesupport-4.1.4/lib/active_support/notifications/instrumenter.rb:20:in `instrument'
	from /app/vendor/bundle/ruby/2.1.0/gems/activerecord-4.1.4/lib/active_record/connection_adapters/abstract_adapter.rb:367:in `log'
	from /app/vendor/bundle/ruby/2.1.0/gems/activerecord-4.1.4/lib/active_record/connection_adapters/postgresql_adapter.rb:822:in `exec_no_cache'
	from /app/vendor/bundle/ruby/2.1.0/gems/activerecord-4.1.4/lib/active_record/connection_adapters/postgresql/database_statements.rb:137:in `exec_query'
	from /app/vendor/bundle/ruby/2.1.0/gems/oboe-2.7.8.1/lib/oboe/frameworks/rails/inst/connection_adapters/utils.rb:74:in `exec_query_with_oboe'
	from /app/vendor/bundle/ruby/2.1.0/gems/activerecord-4.1.4/lib/active_record/connection_adapters/postgresql_adapter.rb:954:in `select'
	from /app/vendor/bundle/ruby/2.1.0/gems/activerecord-4.1.4/lib/active_record/connection_adapters/abstract/database_statements.rb:24:in `select_all'
	from /app/vendor/bundle/ruby/2.1.0/gems/activerecord-4.1.4/lib/active_record/connection_adapters/abstract/query_cache.rb:70:in `select_all'
	from /app/vendor/bundle/ruby/2.1.0/gems/activerecord-4.1.4/lib/active_record/querying.rb:39:in `find_by_sql'
	from /app/vendor/bundle/ruby/2.1.0/gems/activerecord-4.1.4/lib/active_record/relation.rb:604:in `exec_queries'
	from /app/vendor/bundle/ruby/2.1.0/gems/activerecord-4.1.4/lib/active_record/relation.rb:486:in `load'
	from /app/vendor/bundle/ruby/2.1.0/gems/activerecord-4.1.4/lib/active_record/relation.rb:231:in `to_a'
	from /app/vendor/bundle/ruby/2.1.0/gems/activerecord-4.1.4/lib/active_record/relation.rb:595:in `inspect'
	from /app/vendor/bundle/ruby/2.1.0/gems/railties-4.1.4/lib/rails/commands/console.rb:90:in `start'
	from /app/vendor/bundle/ruby/2.1.0/gems/railties-4.1.4/lib/rails/commands/console.rb:9:in `start'
	from /app/vendor/bundle/ruby/2.1.0/gems/railties-4.1.4/lib/rails/commands/commands_tasks.rb:69:in `console'
	from /app/vendor/bundle/ruby/2.1.0/gems/railties-4.1.4/lib/rails/commands/commands_tasks.rb:40:in `run_command!'
	from /app/vendor/bundle/ruby/2.1.0/gems/railties-4.1.4/lib/rails/commands.rb:17:in `<top (required)>'
	from bin/rails:8:in `require'