Allow `column_exists?` to be passed `type` argument as a string

Currently `conn.column_exists?("testings", "created_at", "datetime")`
returns false even if the table has the `created_at` column.

That reason is that `column.type` is a symbol but passed `type` is not
normalized to symbol unlike `column_name`, it is surprising behavior to
me.

I've improved that to normalize a value before comparison.

1 files changed, 1 insertions, 1 deletions

diff --git a/activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb b/activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb
index 208c8c9c64..90a130320b 100644
--- a/activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb
+++ b/activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb
@@ -134,7 +134,7 @@ module ActiveRecord
         column_name = column_name.to_s
         checks = []
         checks << lambda { |c| c.name == column_name }
-        checks << lambda { |c| c.type == type } if type
+        checks << lambda { |c| c.type == type.to_sym rescue nil } if type
         column_options_keys.each do |attr|
           checks << lambda { |c| c.send(attr) == options[attr] } if options.key?(attr)
         end