Arthur Axel "fREW" Schmidt > SQL-Translator-0.11013_03 > SQL::Translator::Schema::Field

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Module Version: 1.59   Source   Latest Release: SQL-Translator-0.11018

NAME ^

SQL::Translator::Schema::Field - SQL::Translator field object

SYNOPSIS ^

  use SQL::Translator::Schema::Field;
  my $field = SQL::Translator::Schema::Field->new(
      name  => 'foo',
      table => $table,
  );

DESCRIPTION ^

SQL::Translator::Schema::Field is the field object.

METHODS ^

new

Object constructor.

  my $field = SQL::Translator::Schema::Field->new(
      name  => 'foo',
      table => $table,
  );

comments

Get or set the comments on a field. May be called several times to set and it will accumulate the comments. Called in an array context, returns each comment individually; called in a scalar context, returns all the comments joined on newlines.

  $field->comments('foo');
  $field->comments('bar');
  print join( ', ', $field->comments ); # prints "foo, bar"

data_type

Get or set the field's data type.

  my $data_type = $field->data_type('integer');

sql_data_type

Constant from DBI package representing this data type. See "DBI Constants" in DBI for more details.

default_value

Get or set the field's default value. Will return undef if not defined and could return the empty string (it's a valid default value), so don't assume an error like other methods.

  my $default = $field->default_value('foo');

extra

Get or set the field's "extra" attibutes (e.g., "ZEROFILL" for MySQL). Accepts a hash(ref) of name/value pairs to store; returns a hash.

  $field->extra( qualifier => 'ZEROFILL' );
  my %extra = $field->extra;

foreign_key_reference

Get or set the field's foreign key reference;

  my $constraint = $field->foreign_key_reference( $constraint );

is_auto_increment

Get or set the field's is_auto_increment attribute.

  my $is_auto = $field->is_auto_increment(1);

is_foreign_key

Returns whether or not the field is a foreign key.

  my $is_fk = $field->is_foreign_key;

is_nullable

Get or set whether the field can be null. If not defined, then returns "1" (assumes the field can be null). The argument is evaluated by Perl for True or False, so the following are eqivalent:

  $is_nullable = $field->is_nullable(0);
  $is_nullable = $field->is_nullable('');
  $is_nullable = $field->is_nullable('0');

While this is technically a field constraint, it's probably easier to represent this as an attribute of the field. In order keep things consistent, any other constraint on the field (unique, primary, and foreign keys; checks) are represented as table constraints.

is_primary_key

Get or set the field's is_primary_key attribute. Does not create a table constraint (should it?).

  my $is_pk = $field->is_primary_key(1);

is_unique

Determine whether the field has a UNIQUE constraint or not.

  my $is_unique = $field->is_unique;

is_valid

Determine whether the field is valid or not.

  my $ok = $field->is_valid;

name

Get or set the field's name.

 my $name = $field->name('foo');

The field object will also stringify to its name.

 my $setter_name = "set_$field";

Errors ("No field name") if you try to set a blank name.

full_name

Read only method to return the fields name with its table name pre-pended. e.g. "person.foo".

order

Get or set the field's order.

  my $order = $field->order(3);

schema

Shortcut to get the fields schema ($field->table->schema) or undef if it doesn't have one.

  my $schema = $field->schema;

size

Get or set the field's size. Accepts a string, array or arrayref of numbers and returns a string.

  $field->size( 30 );
  $field->size( [ 255 ] );
  $size = $field->size( 10, 2 );
  print $size; # prints "10,2"

  $size = $field->size( '10, 2' );
  print $size; # prints "10,2"

table

Get or set the field's table object. As the table object stringifies this can also be used to get the table name.

  my $table = $field->table;
  print "Table name: $table";

Returns the field exactly as the parser found it

equals

Determines if this field is the same as another

  my $isIdentical = $field1->equals( $field2 );

AUTHOR ^

Ken Youens-Clark <kclark@cpan.org>.

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