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PODo I need to manually create indexes for a DBIx::Class belongs_to relationship
 

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  1. PODo I need to manually create indexes for a DBIx::Class belongs_to relationship
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    <p>I'm using the <code>DBIx::Class</code> modules for an ORM approach to an application I have.</p> <p>I'm having some problems with my relationships.</p> <p>I have the following</p> <pre><code>package MySchema::Result::ClusterIP; use strict; use warnings; use base qw/DBIx::Class::Core/; our $VERSION = '1.0'; __PACKAGE__-&gt;load_components(qw/InflateColumn::Object::Enum Core/); __PACKAGE__-&gt;table('cluster_ip'); __PACKAGE__-&gt;add_columns( # Columns here ); __PACKAGE__-&gt;set_primary_key('objkey'); __PACKAGE__-&gt;belongs_to( 'configuration' =&gt; 'MySchema::Result::Configuration', 'config_key'); __PACKAGE__-&gt;belongs_to( 'cluster' =&gt; 'MySchema::Result::Cluster', { 'foreign.config_key' =&gt; 'self.config_key', 'foreign.id' =&gt; 'self.cluster_id' } ); </code></pre> <p>As well as</p> <pre><code>package MySchema::Result::Cluster; use strict; use warnings; use base qw/DBIx::Class::Core/; our $VERSION = '1.0'; __PACKAGE__-&gt;load_components(qw/InflateColumn::Object::Enum Core/); __PACKAGE__-&gt;table('cluster'); __PACKAGE__-&gt;add_columns( # Columns here ); __PACKAGE__-&gt;set_primary_key('objkey'); __PACKAGE__-&gt;belongs_to( 'configuration' =&gt; 'MySchema::Result::Configuration', 'config_key'); __PACKAGE__-&gt;has_many('cluster_ip' =&gt; 'MySchema::Result::ClusterIP', { 'foreign.config_key' =&gt; 'self.config_key', 'foreign.cluster_id' =&gt; 'self.id' }); </code></pre> <p>There are a couple of other modules, but I don't believe that they are relevant.</p> <p>When I attempt to deploy this schema, I get the following error:</p> <pre><code>DBIx::Class::Schema::deploy(): DBI Exception: DBD::mysql::db do failed: Can't create table 'test.cluster_ip' (errno: 150) [ for Statement "CREATE TABLE `cluster_ip` ( `objkey` smallint(5) unsigned NOT NULL auto_increment, `config_key` smallint(5) unsigned NOT NULL, `cluster_id` char(16) NOT NULL, INDEX `cluster_ip_idx_config_key_cluster_id` (`config_key`, `cluster_id`), INDEX `cluster_ip_idx_config_key` (`config_key`), PRIMARY KEY (`objkey`), CONSTRAINT `cluster_ip_fk_config_key_cluster_id` FOREIGN KEY (`config_key`, `cluster_id`) REFERENCES `cluster` (`config_key`, `id`) ON DELETE CASCADE ON UPDATE CASCADE, CONSTRAINT `cluster_ip_fk_config_key` FOREIGN KEY (`config_key`) REFERENCES `configuration` (`config_key`) ON DELETE CASCADE ON UPDATE CASCADE ) ENGINE=InnoDB"] at test_deploy.pl line 18 (running "CREATE TABLE `cluster_ip` ( `objkey` smallint(5) unsigned NOT NULL auto_increment, `config_key` smallint(5) unsigned NOT NULL, `cluster_id` char(16) NOT NULL, INDEX `cluster_ip_idx_config_key_cluster_id` (`config_key`, `cluster_id`), INDEX `cluster_ip_idx_config_key` (`config_key`), PRIMARY KEY (`objkey`), CONSTRAINT `cluster_ip_fk_config_key_cluster_id` FOREIGN KEY (`config_key`, `cluster_id`) REFERENC ES `cluster` (`config_key`, `id`) ON DELETE CASCADE ON UPDATE CASCADE, CONSTRAINT `cluster_ip_fk_config_key` FOREIGN KEY (`config_key`) REFERENCES `configuration` (`conf ig_key`) ON DELETE CASCADE ON UPDATE CASCADE ) ENGINE=InnoDB") at test_deploy.pl line 18 </code></pre> <p>From what I can tell, MySQL is complaining about the FOREIGN KEY constraint, in particular, the REFERENCE to (<code>config_key</code>, <code>id</code>) in the <code>cluster</code> table. From my reading of the MySQL documentation, this seems like a reasonable complaint, especially in regards to the third bullet point on <a href="http://dev.mysql.com/doc/refman/5.5/en/innodb-foreign-key-constraints.html" rel="nofollow">this doc page</a>.</p> <p>Here's my question. Am I missing something in the <code>DBIx::Class</code> module? I realize that I could explicitly create the necessary index to match up with this foreign key constraint, but that seems to be repetitive work. Is there something I should be doing to make this occur implicitly?</p>
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      1. PODo I need to manually create indexes for a DBIx::Class belongs_to relationship
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    1. COPlease add schema which created cluster table.
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      1. PODo I need to manually create indexes for a DBIx::Class belongs_to relationship
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    2. COIt's already in the question
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    3. COI don't see anything like "for Statement "CREATE TABLE `cluster`" in your third block (I think its part of logs)
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