我想添加触发器到我的数据库。我使用DBIx::Class
并遵循以下示例:1,2。
我的代码是:如何使用add_trigger方法在`DBIx :: Class`的帮助下在DB中创建触发器?
package App::Schema;
use base qw/DBIx::Class::Schema/;
__PACKAGE__->load_namespaces();
sub sqlt_deploy_hook {
my ($self, $schema) = @_;
$schema->add_trigger(name => 'foo');
}
1;
但我得到这个错误:
Failed to translate to YAML: translate: Error with producer 'SQL::Translator::Producer::YAML': Can't call method "name" on an undefined value at /home/kes/work/projects/x/app/local/lib/perl5/SQL/Translator/Schema/Trigger.pm line 198
当所要求的dbic-migration
运行的所有环境变量命令:
dbic-migration --force --schema_class App::Schema --database PostgreSQL -Ilib prepare
而此时我的地方,到SQL::Translator::Schema::Trigger
我错过了什么?如何解决这个错误?
UPD
即使当我添加的所有参数我得到错误:
Failed to translate to YAML: translate: Error with parser 'SQL::Translator::Parser::DBIx::Class': Table named users doesn't exist at /home/kes/work/projects/x/app/local/lib/perl5/SQL/Translator/Schema/Trigger.pm line 54
Here目标线:
my $table = $args->{schema}->get_table($arg)
or die "Table named $arg doesn't exist";
修改后的代码:
sub sqlt_deploy_hook {
my ($self, $schema) = @_;
warn "TABLES: " ,$schema->get_tables ,"\n";
$schema->add_trigger(()
,name => 'foo'
,perform_action_when => 'after'
,database_events => 'insert'
,on_table => 'users'
,action => 'text'
,scope => 'row'
);
}
此代码产生下一个警告:
TABLES: users
TABLES: dbix_class_deploymenthandler_versions
但DB有目前只有一个表。我期望它至少应该产生:
TABLES: users dbix_class_deploymenthandler_versions
如何在DB
中创建触发器?