1 package SQL::Translator::Producer::GraphViz;
3 # -------------------------------------------------------------------
4 # Copyright (C) 2002-2009 SQLFairy Authors
6 # This program is free software; you can redistribute it and/or
7 # modify it under the terms of the GNU General Public License as
8 # published by the Free Software Foundation; version 2.
10 # This program is distributed in the hope that it will be useful, but
11 # WITHOUT ANY WARRANTY; without even the implied warranty of
12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 # General Public License for more details.
15 # You should have received a copy of the GNU General Public License
16 # along with this program; if not, write to the Free Software
17 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
19 # -------------------------------------------------------------------
25 SQL::Translator::Producer::GraphViz - GraphViz producer for SQL::Translator
31 my $trans = new SQL::Translator(
32 from => 'MySQL', # or your db of choice
35 out_file => 'schema.png',
37 show_constraints => 1,
41 ) or die SQL::Translator->error;
43 $trans->translate or die $trans->error;
47 Creates a graph of a schema using the amazing graphviz
48 (see http://www.graphviz.org/) application (via
49 the GraphViz module). It's nifty--you should try it!
57 The name of the file where the resulting GraphViz output will be
58 written. Alternatively an open filehandle can be supplied. If
59 undefined (the default) - the result is returned as a string.
61 =item * layout (DEFAULT: 'dot')
63 determines which layout algorithm GraphViz will use; possible
64 values are 'dot' (the default GraphViz layout for directed graph
65 layouts), 'neato' (for undirected graph layouts - spring model)
66 or 'twopi' (for undirected graph layouts - circular)
68 =item * node_shape (DEFAULT: 'record')
70 sets the node shape of each table in the graph; this can be
71 one of 'record', 'plaintext', 'ellipse', 'circle', 'egg',
72 'triangle', 'box', 'diamond', 'trapezium', 'parallelogram',
73 'house', 'hexagon', or 'octagon'
75 =item * output_type (DEFAULT: 'png')
77 sets the file type of the output graphic; possible values are
78 'ps', 'hpgl', 'pcl', 'mif', 'pic', 'gd', 'gd2', 'gif', 'jpeg',
79 'png', 'wbmp', 'cmap', 'ismap', 'imap', 'vrml', 'vtx', 'mp',
80 'fig', 'svg', 'canon', 'plain' or 'text' (see GraphViz for
81 details on each of these)
83 =item * width (DEFAULT: 8.5)
85 width (in inches) of the output graphic
87 =item * height (DEFAULT: 11)
89 height (in inches) of the output grahic
93 custom font size for node and edge labels (note that arbitrarily large
94 sizes may be ignored due to page size or graph size constraints)
98 custom font name (or full path to font file) for node, edge, and graph
103 reference to a hash of node attribute names and their values; these
104 may override general fontname or fontsize parameter
108 reference to a hash of edge attribute names and their values; these
109 may override general fontname or fontsize parameter
113 reference to a hash of graph attribute names and their values; these
114 may override the general fontname parameter
116 =item * show_fields (DEFAULT: true)
118 if set to a true value, the names of the colums in a table will
119 be displayed in each table's node
123 if set to a true value, only columns which are foreign keys
124 will be displayed in each table's node
126 =item * show_datatypes
128 if set to a true value, the datatype of each column will be
129 displayed next to each column's name; this option will have no
130 effect if the value of show_fields is set to false
134 if set to a true value, the size (in bytes) of each CHAR and
135 VARCHAR column will be displayed in parentheses next to the
136 column's name; this option will have no effect if the value of
137 show_fields is set to false
139 =item * show_constraints
141 if set to a true value, a field's constraints (i.e., its
142 primary-key-ness, its foreign-key-ness and/or its uniqueness)
143 will appear as a comma-separated list in brackets next to the
144 field's name; this option will have no effect if the value of
145 show_fields is set to false
149 if set to a true value, the graphic will have a background
150 color of 'lightgoldenrodyellow'; otherwise the background
155 if set to a true value, the make_natural_join method of
156 SQL::Translator::Schema will be called before generating the
157 graph; a true value for join_pk_only (see below) implies a
158 true value for this option
162 the value of this option will be passed as the value of the
163 like-named argument in the make_natural_join method (see
164 natural_join above) of SQL::Translator::Schema, if either the
165 value of this option or the natural_join option is set to true
169 the value of this option will be passed as the value of the
170 like-named argument in the make_natural_join method (see
171 natural_join above) of SQL::Translator::Schema, if either
172 the natural_join or join_pk_only options has a true value
176 A comma-separated list of table names that should be skipped.
178 =item * skip_tables_like
180 A comma-separated list of regular expressions describing table names
181 that should be skipped.
185 if set to a true value, each record will also show the indexes
186 set on each table. it describes the index types along with
187 which columns are included in the index. this option requires
188 that show_fields is a true value as well
190 =item * show_index_names
192 if show_indexes is set to a true value, then the value of this
193 parameter determines whether or not to print names of indexes.
194 if show_index_names is false, then a list of indexed columns
195 will appear below the field list. otherwise, it will be a list
196 prefixed with the name of each index. it defaults to true.
198 =item * friendly_ints
200 if set to a true value, each integer type field will be displayed
201 as a smallint, integer or bigint depending on the field's
202 associated size parameter. this only applies for the 'integer'
203 type (and not the lowercase 'int' type, which is assumed to be a
206 =item * friendly_ints_extended
208 if set to a true value, the friendly ints displayed will take into
209 account the non-standard types, 'tinyint' and 'mediumint' (which,
210 as far as I am aware, is only implemented in MySQL)
218 use SQL::Translator::Schema::Constants;
219 use SQL::Translator::Utils qw(debug);
220 use Scalar::Util qw/openhandle/;
222 use vars qw[ $VERSION $DEBUG ];
224 $DEBUG = 0 unless defined $DEBUG;
226 use constant VALID_LAYOUT => {
232 use constant VALID_NODE_SHAPE => {
250 my $schema = $t->schema;
251 my $args = $t->producer_args;
252 local $DEBUG = $t->debug;
254 my $out_file = $args->{'out_file'} || '';
255 my $layout = $args->{'layout'} || 'dot';
256 my $node_shape = $args->{'node_shape'} || 'record';
257 my $output_type = $args->{'output_type'} || 'png';
258 my $width = defined $args->{'width'}
259 ? $args->{'width'} : 8.5;
260 my $height = defined $args->{'height'}
261 ? $args->{'height'} : 11;
262 my $fontsize = $args->{'fontsize'};
263 my $fontname = $args->{'fontname'};
264 my $edgeattrs = $args->{'edgeattrs'} || {};
265 my $graphattrs = $args->{'graphattrs'} || {};
266 my $nodeattrs = $args->{'nodeattrs'} || {};
267 my $show_fields = defined $args->{'show_fields'}
268 ? $args->{'show_fields'} : 1;
269 my $add_color = $args->{'add_color'};
270 my $natural_join = $args->{'natural_join'};
271 my $show_fk_only = $args->{'show_fk_only'};
272 my $show_datatypes = $args->{'show_datatypes'};
273 my $show_sizes = $args->{'show_sizes'};
274 my $show_indexes = $args->{'show_indexes'};
275 my $show_index_names = defined $args->{'show_index_names'}
276 ? $args->{'show_index_names'} : 1;
277 my $friendly_ints = $args->{'friendly_ints'};
278 my $friendly_ints_ex = $args->{'friendly_ints_extended'};
279 my $show_constraints = $args->{'show_constraints'};
280 my $join_pk_only = $args->{'join_pk_only'};
281 my $skip_fields = $args->{'skip_fields'} || '';
282 my $skip_tables = $args->{'skip_tables'} || '';
283 my $skip_tables_like = $args->{'skip_tables_like'} || '';
284 my %skip = map { s/^\s+|\s+$//g; length $_ ? ($_, 1) : () }
285 split ( /,/, $skip_fields );
286 $natural_join ||= $join_pk_only;
288 $schema->make_natural_joins(
289 join_pk_only => $join_pk_only,
290 skip_fields => $args->{'skip_fields'},
293 die "Invalid layout '$layout'" unless VALID_LAYOUT->{ $layout };
294 die "Invalid node shape'$node_shape'"
295 unless VALID_NODE_SHAPE->{ $node_shape };
297 for ( $height, $width ) {
298 $_ = 0 unless $_ =~ /^\d+(.\d)?$/;
303 directed => $natural_join ? 0 : 1,
306 bgcolor => $add_color ? 'lightgoldenrodyellow' : 'white',
308 shape => $node_shape,
310 fillcolor => 'white',
313 $args{'width'} = $width if $width;
314 $args{'height'} = $height if $height;
315 # set fontsize for edge and node labels if specified
317 $args{'node'}->{'fontsize'} = $fontsize;
318 $args{'edge'} = {} unless $args{'edge'};
319 $args{'edge'}->{'fontsize'} = $fontsize;
321 # set the font name globally for node, edge, and graph labels if
322 # specified (use node, edge, or graph attributes for individual
323 # font specification)
325 $args{'node'}->{'fontname'} = $fontname;
326 $args{'edge'} = {} unless $args{'edge'};
327 $args{'edge'}->{'fontname'} = $fontname;
328 $args{'graph'} = {} unless $args{'graph'};
329 $args{'graph'}->{'fontname'} = $fontname;
331 # set additional node, edge, and graph attributes; these may
332 # possibly override ones set before
333 while (my ($key,$val) = each %$nodeattrs) {
334 $args{'node'}->{$key} = $val;
336 $args{'edge'} = {} if %$edgeattrs && !$args{'edge'};
337 while (my ($key,$val) = each %$edgeattrs) {
338 $args{'edge'}->{$key} = $val;
340 $args{'graph'} = {} if %$edgeattrs && !$args{'graph'};
341 while (my ($key,$val) = each %$graphattrs) {
342 $args{'graph'}->{$key} = $val;
346 # Create a blank GraphViz object and see if we can produce the output type.
348 my $gv = GraphViz->new( %args ) or die "Can't create GraphViz object\n";
349 my $output_method = "as_$output_type";
351 # the generators are AUTOLOADed so can't use ->can ($output_method)
352 eval { $gv->$output_method };
353 die "Invalid output type: '$output_type'" if $@;
355 my %skip_table = map { $_, 1 } split /\s*,\s*/, $skip_tables;
356 my @skip_tables_like = map { qr/$_/ } split /\s*,\s*/, $skip_tables_like;
357 my %nj_registry; # for locations of fields for natural joins
358 my @fk_registry; # for locations of fields for foreign keys
361 for my $table ( $schema->get_tables ) {
362 my $tname = $table->name;
365 next TABLE if $skip_table{ $tname };
367 for my $regex ( @skip_tables_like ) {
368 next TABLE if $tname =~ $regex;
372 my @fields = $table->get_fields;
373 if ( $show_fk_only ) {
374 @fields = grep { $_->is_foreign_key } @fields;
378 if ( $show_fields ) {
380 for my $field ( @fields ) {
382 if ($show_datatypes) {
383 $field_type = $field->data_type;
385 # For the integer type, transform into different
386 # types based on requested size, if a size is given.
389 and ( lc $field_type ) eq 'integer'
391 # Automatically translate to int2, int4, int8
392 # Type (Bits) Max. Signed/Unsigned Length
395 # smallint (16) 32767 5
397 # mediumint* (24) 8388607 7
399 # int (32) 2147483647 10
401 # bigint (64) 9223372036854775807 19
402 # 18446744073709551615 20
404 # * tinyint and mediumint are nonstandard extensions
405 # which are only available under MySQL (to my knowledge)
406 my $size = $field->size;
407 if ( $size <= 3 and $friendly_ints_ex ) {
408 $field_type = 'tinyint',;
410 elsif ( $size <= 5 ) {
411 $field_type = 'smallint';
413 elsif ( $size <= 8 and $friendly_ints_ex ) {
414 $field_type = 'mediumint';
416 elsif ( $size <= 11 ) {
417 $field_type = 'integer';
420 $field_type = 'bigint';
427 and ( $field_type =~ /^(var)?char2?$/
428 or $field_type eq 'numeric'
429 or $field_type eq 'decimal' )
431 $field_type .= '(' . $field->size . ')';
436 if ( $show_constraints ) {
439 push( @constraints, 'PK' ) if $field->is_primary_key;
440 push( @constraints, 'FK' ) if $field->is_foreign_key;
441 push( @constraints, 'U' ) if $field->is_unique;
443 $constraints = join( ',', @constraints );
446 # construct the field line from all info gathered so far
447 push @fmt_fields, join( ' ',
450 $constraints ? "[$constraints]" : (),
454 # join field lines with graphviz formatting
455 $field_str = join( '\l', @fmt_fields ) . '\l';
461 for my $index ( $table->get_indices ) {
462 next unless $index->is_valid;
464 push @fmt_indexes, join( ' ',
466 $show_index_names ? $index->name . ':' : (),
467 join( ', ', $index->fields ),
468 ( $index->type eq 'UNIQUE' ) ? '[U]' : (),
472 # join index lines with graphviz formatting (if any indexes at all)
473 $index_str = join( '\l', @fmt_indexes ) . '\l' if @fmt_indexes;
476 my $table_name = $table->name;
477 my $name_str = $table_name . '\n';
480 for ($name_str, $field_str, $index_str) {
485 # only the 'record' type supports nice formatting
486 if ( $node_shape eq 'record' ) {
487 # the necessity to supply shape => 'record' is a graphviz bug
488 $gv->add_node( $table_name,
490 label => sprintf( '{%s}',
491 join( '|', $name_str, $field_str || (), $index_str || (), ),
496 my $sep = sprintf ('%s\n',
497 '-' x ( (length $table_name) + 2)
500 $gv->add_node( $table_name,
509 debug("Processing table '$table_name'");
511 debug("Fields = ", join(', ', map { $_->name } @fields));
513 for my $f ( @fields ) {
514 my $name = $f->name or next;
515 my $is_pk = $f->is_primary_key;
516 my $is_unique = $f->is_unique;
519 # Decide if we should skip this field.
521 if ( $natural_join ) {
522 next unless $is_pk || $f->is_foreign_key;
525 my $constraints = $f->{'constraints'};
527 if ( $natural_join && !$skip{ $name } ) {
528 push @{ $nj_registry{ $name } }, $table_name;
532 unless ( $natural_join ) {
533 for my $c ( $table->get_constraints ) {
534 next unless $c->type eq FOREIGN_KEY;
535 my $fk_table = $c->reference_table or next;
537 for my $field_name ( $c->fields ) {
538 for my $fk_field ( $c->reference_fields ) {
539 next unless defined $schema->get_table( $fk_table );
540 push @fk_registry, [ $table_name, $fk_table ];
548 # Make the connections.
551 if ( $natural_join ) {
552 for my $field_name ( keys %nj_registry ) {
553 my @table_names = @{ $nj_registry{ $field_name } || [] } or next;
554 next if scalar @table_names == 1;
555 push @table_bunches, [ @table_names ];
559 @table_bunches = @fk_registry;
563 for my $bunch ( @table_bunches ) {
564 my @tables = @$bunch;
566 for my $i ( 0 .. $#tables ) {
567 my $table1 = $tables[ $i ];
568 for my $j ( 0 .. $#tables ) {
570 my $table2 = $tables[ $j ];
571 next if $done{ $table1 }{ $table2 };
572 $gv->add_edge( $table2, $table1 );
573 $done{ $table1 }{ $table2 } = 1;
574 $done{ $table2 }{ $table1 } = 1;
583 if ( openhandle( $out_file ) ) {
584 print $out_file $gv->$output_method;
587 open my $fh, ">$out_file" or die "Can't write '$out_file': $!\n";
589 print $fh $gv->$output_method;
594 return $gv->$output_method;
600 # -------------------------------------------------------------------
606 Ken Youens-Clark E<lt>kclark@cpan.orgE<gt>,
607 Jonathan Yu E<lt>frequency@cpan.orgE<gt>
611 SQL::Translator, GraphViz.