Jifty::DBI::Column(3p)

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:

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

•   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.