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jifty::dbi::column

Jifty::DBI::Column(3pm) 				User Contributed Perl Documentation				   Jifty::DBI::Column(3pm)

NAME

       Jifty::DBI::Column - Encapsulates a single column in a Jifty::DBI::Record table

DESCRIPTION

       This class encapsulates a single column in a Jifty::DBI::Record table description. It replaces the _accessible method in
       Jifty::DBI::Record.

       It has the following accessors: "name type default validator boolean refers_to readable writable length".

   new
   is_numeric
       Returns true if the column is of some numeric type, otherwise returns false.

   is_string
       Returns true if this column is a text field

   is_boolean
       Returns true if this column is a boolean

   serialize_metadata
       Returns a hash describing this column object with enough detail to fully describe it in the database.  Intentionally skips "record_class",
       all column attributes starting with "_", and all column attributes which are undefined.	The "known" attributes in the "attributes" hash
       are flattened and returned as well.  The list of known attributes are:

       container
       label hints render_as
       display_length
       valid_values
       available_values
       autocompleted
       documentation
       no_placeholder
	   Setting this to a true value causes "load_by_cols" in Jifty::DBI::record to not use a placeholder when loading the column.  This can
	   allow the database to come up with better query plans in some cases.

   serialize_metadata2
       Returns a hash describing this column object with enough detail to fully describe it in the database.  Intentionally skips "record_class",
       all column attributes starting with "_", and all column attributes which are undefined.

   validator
       Gets/sets the validator coderef for the column.

   read
       DEPRECATED.  Use "$column->readable" instead.

   write
       DEPRECATED.  Use "$column->writable" instead.

   length
       DEPRECATED.  Use "$column->max_length" instead.

   until
       DEPRECATED.  Use "$column->till" instead.

   active
       Returns the a true value if the column method exists for the current application version. The current application version is determined by
       checking the "schema_version" in Jifty::DBI::Record of the column's "record_class". This method returns a false value if the column is not
       yet been added or has been dropped.

       This method returns a false value under these circumstances:

       o   Both the "since" trait and "schema_version" method are defined and "schema_version" is less than the version set on "since".

       o   Both the "till" trait and "schema_version" method are defined and "schema_version" is greater than or equal to the version set on
	   "till".

       Otherwise, this method returns true.

perl v5.14.2							    2012-01-25						   Jifty::DBI::Column(3pm)