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-rw-r--r--activerecord/lib/active_record/connection_adapters/postgresql/oid/date_time.rb27
1 files changed, 27 insertions, 0 deletions
diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/oid/date_time.rb b/activerecord/lib/active_record/connection_adapters/postgresql/oid/date_time.rb
new file mode 100644
index 0000000000..b9e7894e5c
--- /dev/null
+++ b/activerecord/lib/active_record/connection_adapters/postgresql/oid/date_time.rb
@@ -0,0 +1,27 @@
+module ActiveRecord
+ module ConnectionAdapters
+ module PostgreSQL
+ module OID # :nodoc:
+ class DateTime < Type::DateTime # :nodoc:
+ include Infinity
+
+ def cast_value(value)
+ if value.is_a?(::String)
+ case value
+ when 'infinity' then ::Float::INFINITY
+ when '-infinity' then -::Float::INFINITY
+ when / BC$/
+ astronomical_year = format("%04d", -value[/^\d+/].to_i + 1)
+ super(value.sub(/ BC$/, "").sub(/^\d+/, astronomical_year))
+ else
+ super
+ end
+ else
+ value
+ end
+ end
+ end
+ end
+ end
+ end
+end