mysql多对多添加数据_mysql – 如何通过DBIx为多对多关系插入数据？
我试图了解DBiX,当我有多对多的关系时,我正在努力将数据插入到我的数据库中.
在下面的示例中,我在对象和网络之间存在多对多关系.
对象具有名称和描述
网络具有IP和网络掩码
我有一个多对多关系的联结表.
如何添加对象及其关联网络？
比如我有
object
—————
Name : TestObject1
Description: TestObject1
使用以下网络
IP:1.1.1.1
Netmask:255.255.255.255
IP:2.2.2.2
Netmask:255.255.255.255
和
Name : TestObject2
Description: TestObject2
使用以下网络
IP:1.1.1.1
Netmask:255.255.255.255
IP:3.3.3.3
Netmask:255.255.255.255
我知道如何插入具有1到多个关系的数据,但我无法弄清楚如何处理多对多.理想情况下,我希望能够构建我的数据结构,然后一次性添加它.
下面是由模式加载器创建的相关表.
谢谢.
Object Table
------------
__PACKAGE__->table("Object");
__PACKAGE__->add_columns(
"objectid",
{ data_type => "integer", is_auto_increment => 1, is_nullable => 0 },
"description",
{ data_type => "varchar", is_nullable => 1, size => 100 },
"objectname",
{ data_type => "varchar", is_nullable => 0, size => 100 },
);
__PACKAGE__->set_primary_key("objectid");
__PACKAGE__->has_many(
"object_has_networks",
"TestApp::Schema::Result::ObjectHasNetwork",
{ "foreign.object_objectid" => "self.objectid" },
{ cascade_copy => 0, cascade_delete => 0 },
);
__PACKAGE__->many_to_many(
"network_networkids",
"object_has_networks",
"network_networkid",
);
Network Table
------------
__PACKAGE__->table("network");
__PACKAGE__->add_columns(
"networkid",
{ data_type => "integer", is_auto_increment => 1, is_nullable => 0 },
“IP”,
{ data_type => "varchar", is_nullable => 1, size => 15 },
"netmask",
{ data_type => "varchar", is_nullable => 1, size => 15 },
);
__PACKAGE__->set_primary_key("networkid");
__PACKAGE__->has_many(
"object_has_networks",
"TestApp::Schema::Result::ObjectHasNetwork",
{ "foreign.network_networkid" => "self.networkid" },
{ cascade_copy => 0, cascade_delete => 0 },
);
__PACKAGE__->many_to_many("object_objectids", "object_has_networks", "object_objectid");
Junction Table
--------------
__PACKAGE__->table("Object_has_network");
__PACKAGE__->add_columns(
"object_objectid",
{ data_type => "integer", is_foreign_key => 1, is_nullable => 0 },
"network_networkid",
{ data_type => "integer", is_foreign_key => 1, is_nullable => 0 },
);
__PACKAGE__->set_primary_key("object_objectid", "network_networkid");:wq
__PACKAGE__->belongs_to(
"network_networkid",
"TestApp::Schema::Result::Network",
{ networkid => "network_networkid" },
{ is_deferrable => 1, on_delete => "NO ACTION", on_update => "NO ACTION" },
);
__PACKAGE__->belongs_to(
"object_objectid",
"TestApp::Schema::Result::Object",
{ objectid => "object_objectid" },
{ is_deferrable => 1, on_delete => "NO ACTION", on_update => "NO ACTION" },
);
最佳答案 第一个DBIx是一个完整的命名空间,其中DBIx :: Class只是一个dist.常见的缩写是DBIC.
多对多不是关系而是辅助,因此您只需指定形成m2m关系桥的两个关系以进行搜索和插入.