1 package SQL::Translator::Producer::TTSchema;
7 SQL::Translator::Producer::TTSchema -
8 Produces output using the Template Toolkit from a SQL schema
13 my $translator = SQL::Translator->new(
15 filename => 'foo_schema.sql',
18 ttfile => 'foo_template.tt', # Template file to use
20 # Extra template variables
25 # Template config options
27 INCLUDE_PATH => '/foo/templates',
31 print $translator->translate;
35 Produces schema output using a given Template Tookit template.
37 It needs one additional producer_arg of C<ttfile> which is the file
38 name of the template to use. This template will be passed a variable
39 called C<schema>, which is the C<SQL::Translator::Producer::Schema> object
40 created by the parser. You can then use it to walk the schema via the
41 methods documented in that module.
43 Here's a brief example of what the template could look like:
45 database: [% schema.database %]
47 [% FOREACH table = schema.get_tables %]
50 [% FOREACH field = table.get_fields %]
51 [% field.name %] [% field.data_type %]([% field.size %])
55 See F<t/data/template/basic.tt> for a more complete example.
57 The template will also get the set of extra variables given as a hashref via the
58 C<tt_vars> producer arg.
60 You can set any of the options used to initiallize the Template object by
61 adding a tt_conf producer_arg. See Template Toolkit docs for details of
63 (Note that the old style of passing this config directly in the producer args
67 $translator = SQL::Translator->new(
70 ttfile => 'foo_template.tt',
73 INCLUDE_PATH => '/foo/templates/tt',
79 You can use this producer to create any type of text output you like,
80 even using it to create your own versions of what the other producers
81 make. For example, you could create a template that translates the
82 schema into MySQL's syntax, your own HTML documentation, your own
83 Class::DBI classes (or some other code) -- the opportunities are
92 The template file to generate the output with.
96 A hash ref of extra variables you want to add to the template.
100 A hash ref of configuration options to pass to the L<Template> object's
110 our ( $DEBUG, @EXPORT_OK );
111 our $VERSION = '1.59';
112 $DEBUG = 0 unless defined $DEBUG;
117 use base qw(Exporter);
118 @EXPORT_OK = qw(produce);
120 use SQL::Translator::Utils 'debug';
123 my $translator = shift;
124 local $DEBUG = $translator->debug;
125 my $scma = $translator->schema;
126 my $args = $translator->producer_args;
127 my $file = delete $args->{'ttfile'} or die "No template file!";
129 my $tt_vars = delete $args->{'tt_vars'} || {};
130 if ( exists $args->{ttargs} ) {
131 warn "Use of 'ttargs' producer arg is deprecated."
132 ." Please use 'tt_vars' instead.\n";
133 %$tt_vars = { %{$args->{ttargs}}, %$tt_vars };
136 my %tt_conf = exists $args->{tt_conf} ? %{$args->{tt_conf}} : ();
137 # sqlt passes the producer args for _all_ producers in, so we use this
138 # grep hack to test for the old usage.
139 debug(Dumper(\%tt_conf));
140 if ( grep /^[A-Z_]+$/, keys %$args ) {
141 warn "Template config directly in the producer args is deprecated."
142 ." Please use 'tt_conf' instead.\n";
143 %tt_conf = ( %tt_conf, %$args );
146 debug "Processing template $file\n";
148 my $tt = Template->new(
150 ABSOLUTE => 1, # Set so we can use from the command line sensibly
151 RELATIVE => 1, # Maybe the cmd line code should set it! Security!
154 debug("Template ERROR: " . Template->error. "\n") if(!$tt);
155 $tt || die "Failed to initialize Template object: ".Template->error;
157 my $ttproc = $tt->process(
159 { schema => $scma , %$tt_vars },
162 debug("ERROR: ". $tt->error. "\n") if(!$ttproc);
163 $ttproc or die "Error processing template '$file': ".$tt->error;
174 Mark Addison E<lt>grommit@users.sourceforge.netE<gt>.
178 B<More template vars?> e.g. [% tables %] as a shortcut for
179 [% schema.get_tables %].