make MySQL FK handling more robust

Now handles FKs to schemas not listed in db_schema, and to tables that
don't exist at all.

diff --git a/lib/DBIx/Class/Schema/Loader/DBI/SQLAnywhere.pm b/lib/DBIx/Class/Schema/Loader/DBI/SQLAnywhere.pm
index b353861..e92cfe6 100644 (file)
--- a/lib/DBIx/Class/Schema/Loader/DBI/SQLAnywhere.pm
+++ b/lib/DBIx/Class/Schema/Loader/DBI/SQLAnywhere.pm
@@ -9,6 +9,7 @@ use base qw/
 use mro 'c3';
 use List::MoreUtils 'any';
 use namespace::clean;
+use DBIx::Class::Schema::Loader::Table ();
 
 our $VERSION = '0.07010';
 

diff --git a/lib/DBIx/Class/Schema/Loader/DBI/mysql.pm b/lib/DBIx/Class/Schema/Loader/DBI/mysql.pm
index 8131ee2..f62162d 100644 (file)
--- a/lib/DBIx/Class/Schema/Loader/DBI/mysql.pm
+++ b/lib/DBIx/Class/Schema/Loader/DBI/mysql.pm
@@ -9,6 +9,7 @@ use List::Util 'first';
 use List::MoreUtils 'any';
 use Try::Tiny;
 use namespace::clean;
+use DBIx::Class::Schema::Loader::Table ();
 
 our $VERSION = '0.07010';
 
@@ -88,10 +89,28 @@ sub _table_fk_info {
         my @f_cols = map { s/$qt//g; $self->_lc($_) }
             split(/$qt?\s*$qt?,$qt?\s*$qt?/, $f_cols);
 
-        my $remote_table = first {
-               lc($_->name) eq lc($f_table)
-            && ((not $f_schema) || lc($_->schema) eq lc($f_schema))
-        } $self->_tables_list;
+        my $remote_table = do {
+            # Get ->tables_list to return tables from the remote schema, in case it is not in the db_schema list.
+            local $self->{db_schema} = [ $f_schema ] if $f_schema;
+
+            first {
+                   lc($_->name) eq lc($f_table)
+                && ((not $f_schema) || lc($_->schema) eq lc($f_schema))
+            } $self->_tables_list;
+        };
+
+        # The table may not be in any database, or it may not have been found by the previous code block for whatever reason.
+        if (not $remote_table) {
+            my $remote_schema = $f_schema || $self->db_schema && @{ $self->db_schema } == 1 && $self->db_schema->[0];
+
+            $remote_table = DBIx::Class::Schema::Loader::Table->new(
+                loader => $self,
+                name   => $f_table,
+                ($remote_schema ? (
+                    schema => $remote_schema,
+                ) : ()),
+            );
+        }
 
         push(@rels, {
             local_columns => \@cols,

diff --git a/t/10_02mysql_common.t b/t/10_02mysql_common.t
index 2df8a4b..65292e6 100644 (file)
--- a/t/10_02mysql_common.t
+++ b/t/10_02mysql_common.t
@@ -261,6 +261,22 @@ EOF
                         FOREIGN KEY (mysql_loader_test7_id) REFERENCES `dbicsl.test`.mysql_loader_test7 (id)
                     ) $innodb
 EOF
+                # Test dumping a rel to a table that's not part of the dump.
+                $dbh->do('CREATE DATABASE `dbicsl_test_ignored`');
+                $dbh->do(<<"EOF");
+                    CREATE TABLE `dbicsl_test_ignored`.mysql_loader_test9 (
+                        id INT AUTO_INCREMENT PRIMARY KEY,
+                        value VARCHAR(100)
+                    ) $innodb
+EOF
+                $dbh->do(<<"EOF");
+                    CREATE TABLE `dbicsl-test`.mysql_loader_test10 (
+                        id INT AUTO_INCREMENT PRIMARY KEY,
+                        value VARCHAR(100),
+                        mysql_loader_test9_id INTEGER,
+                        FOREIGN KEY (mysql_loader_test9_id) REFERENCES `dbicsl_test_ignored`.mysql_loader_test9 (id)
+                    ) $innodb
+EOF
 
                 $databases_created = 1;
 
@@ -436,7 +452,9 @@ else {
 END {
     if (not $ENV{SCHEMA_LOADER_TESTS_NOCLEANUP}) {
         if ($databases_created && (my $dbh = try { $schema->storage->dbh })) {
-            foreach my $table ('`dbicsl-test`.mysql_loader_test8',
+            foreach my $table ('`dbicsl-test`.mysql_loader_test10',
+                               'dbicsl_test_ignored.mysql_loader_test9',
+                               '`dbicsl-test`.mysql_loader_test8',
                                '`dbicsl.test`.mysql_loader_test7',
                                '`dbicsl.test`.mysql_loader_test6',
                                '`dbicsl-test`.mysql_loader_test5',
@@ -449,7 +467,7 @@ END {
                 };
             }
 
-            foreach my $db (qw/dbicsl-test dbicsl.test/) {
+            foreach my $db (qw/dbicsl-test dbicsl.test dbicsl_test_ignored/) {
                 try {
                     $dbh->do("DROP DATABASE `$db`");
                 }