NAME¶
SQL::Translator::Producer::TT::Table -
Produces output using the Template Toolkit from a SQL schema, per table.
SYNOPSIS¶
# Normal STDOUT version
#
my $translator = SQL::Translator->new(
from => 'MySQL',
filename => 'foo_schema.sql',
to => 'TT::Table',
producer_args => {
tt_table => 'foo_table.tt',
},
);
print $translator->translate;
# To generate a file per table
#
my $translator = SQL::Translator->new(
from => 'MySQL',
filename => 'foo_schema.sql',
to => 'TT::Table',
producer_args => {
tt_table => 'foo_table.tt.html',
mk_files => 1,
mk_files_base => "./doc/tables",
mk_file_ext => ".html",
on_exists => "replace",
},
);
#
# ./doc/tables/ now contains the templated tables as $tablename.html
#
DESCRIPTION¶
Produces schema output using a given Template Tookit template, processing that
template for each table in the schema. Optionally allows you to write the
result for each table to a separate file.
It needs one additional producer_arg of "tt_table" which is the file
name of the template to use. This template will be passed a template var of
"table", which is the current SQL::Translator::Producer::Table table
we are producing, which you can then use to walk the schema via the methods
documented in that module. You also get schema as a shortcut to the
SQL::Translator::Producer::Schema for the table and "translator",
the SQL::Translator object for this parse in case you want to get access to
any of the options etc set here.
Here's a brief example of what the template could look like:
[% table.name %]
================
[% FOREACH field = table.get_fields %]
[% field.name %] [% field.data_type %]([% field.size %])
[% END -%]
See
t/data/template/table.tt for a more complete example.
You can also set any of the options used to initiallize the Template object by
adding them to your producer_args. See Template Toolkit docs for details of
the options.
$translator = SQL::Translator->new(
to => 'TT',
producer_args => {
ttfile => 'foo_template.tt',
INCLUDE_PATH => '/foo/templates/tt',
INTERPOLATE => 1,
},
);
If you set "mk_files" and its additional options the producer will
write a separate file for each table in the schema. This is useful for
producing things like HTML documentation where every table gets its own page
(you could also use TTSchema producer to add an index page). Its also
particulary good for code generation where you want to produce a class file
per table.
OPTIONS¶
- tt_table
- File name of the template to run for each table.
- mk_files
- Set to true to output a file for each table in the schema
(as well as returning the whole lot back to the Translalor and hence
STDOUT). The file will be named after the table, with the optional
"mk_files_ext" added and placed in the directory
"mk_files_base".
- mk_files_ext
- Extension (without the dot) to add to the filename when
using mk_files.
- mk_files_base = DIR
- Dir to build the table files into when using mk_files.
Defaults to the current directory.
- mk_file_dir
- Set true and if the file needs to written to a directory
that doesn't exist, it will be created first.
- on_exists [Default:replace]
- What to do if we are running with mk_files and a file
already exists where we want to write our output. One of "skip",
"die", "replace", "insert". The default is
die.
replace - Over-write the existing file with the new one, clobbering
anything already there.
skip - Leave the origional file as it was and don't write the new
version anywhere.
die - Die with an existing file error.
insert - Insert the generated output into the file bewteen a set of
special comments (defined by the following options.) Any code between the
comments will be overwritten (ie the results from a previous produce) but
the rest of the file is left alone (your custom code). This is
particularly useful for code generation as it allows you to generate
schema derived code and then add your own custom code to the file. Then
when the schema changes you just re-produce to insert the new code.
- insert_comment_start
- The comment to look for in the file when on_exists is
"insert". Default is "SQLF INSERT START". Must appear
on it own line, with only whitespace either side, to be recognised.
- insert_comment_end
- The end comment to look for in the file when on_exists is
"insert". Default is "SQLF INSERT END". Must appear on
it own line, with only whitespace either side, to be recognised.
AUTHOR¶
Mark Addison <grommit@users.sourceforge.net>.
TODO¶
- Some tests for the various on exists options (they have been tested
implicitley through use in a project but need some proper tests).
- More docs on code generation strategies.
- Better hooks for filename generation.
- Integrate with TT::Base and TTSchema.
SEE ALSO¶
SQL::Translator.