mysql外键不检查正确的值

Question

我有 3 张桌子：

CREATE TABLE World_Type ( 
  Name_             varchar (15) NOT NULL,
  Skills            varchar (30),
  Bonus             varchar (30),       
  Penalty           varchar (30),
  Description       varchar (90),
  PRIMARY KEY (Name_)   );

  CREATE TABLE Class (
  Class_name        varchar (30) NOT NULL,
  Description       varchar (50),
  PRIMARY KEY (Class_name)  );

CREATE TABLE character_ ( 
  Name_             varchar (30) NOT NULL,
  Class             varchar (30),
  World_Type        varchar (15),
  Str               integer     ,
  WS                integer     ,               
  BS                integer     ,
  Fel               integer     ,
  Per               integer     ,
  Int_              integer     ,
  Agi               integer     ,
  WP                integer     ,
  Tough             integer     ,  
  PRIMARY KEY (Name_)           ,
  FOREIGN KEY (Class) REFERENCES Class(Class_name),
  FOREIGN KEY (World_Type) REFERENCES World_Type(Name_)     );

  CREATE TABLE world_class_requirements (
  World_Type        varchar (15) NOT NULL,
  Class_name        varchar (30) NOT NULL,
  PRIMARY KEY (World_Type, Class_name),
  FOREIGN KEY (World_Type) REFERENCES World_Type(Name_),
  FOREIGN KEY (Class_Name) REFERENCES Class(Class_name)     );

在character_中创建一个人时，它应该检查它是否可能有正确的组合，如果条件正确则插入，如果不正确则出错。但是，即使我故意插入无效的 worl_type 和 class 组合，它仍然会插入 character_ 表中。

world_class_requirements 中的值是：

INSERT INTO world_class_requirements (World_Type, Class_name) VALUES (
'Feral World','Assassin');

INSERT INTO world_class_requirements (World_Type, Class_name) VALUES (
'Feral World','Guardsman');

INSERT INTO world_class_requirements (World_Type, Class_name) VALUES (
'Feral World','Imperial Psyker');

INSERT INTO world_class_requirements (World_Type, Class_name) VALUES (
'Feral World','Scum');

INSERT INTO world_class_requirements (World_Type, Class_name) VALUES (
'Hive World','Arbitrator');

INSERT INTO world_class_requirements (World_Type, Class_name) VALUES (
'Hive World','Assassin');

INSERT INTO world_class_requirements (World_Type, Class_name) VALUES (
'Hive World','Cleric');

INSERT INTO world_class_requirements (World_Type, Class_name) VALUES (
'Hive World','Guardsman');

INSERT INTO world_class_requirements (World_Type, Class_name) VALUES (
'Hive World','Imperial Psyker');

INSERT INTO world_class_requirements (World_Type, Class_name) VALUES (
'Hive World','Scum');

INSERT INTO world_class_requirements (World_Type, Class_name) VALUES (
'Hive World','Tech-Priest');

INSERT INTO world_class_requirements (World_Type, Class_name) VALUES (
'Imperial World','Adept');

INSERT INTO world_class_requirements (World_Type, Class_name) VALUES (
'Imperial World','Arbitrator');

INSERT INTO world_class_requirements (World_Type, Class_name) VALUES (
'Imperial World','Assassin');

INSERT INTO world_class_requirements (World_Type, Class_name) VALUES (
'Imperial World','Cleric');

INSERT INTO world_class_requirements (World_Type, Class_name) VALUES (
'Imperial World','Guardsman');

INSERT INTO world_class_requirements (World_Type, Class_name) VALUES (
'Imperial World','Imperial Psyker');

INSERT INTO world_class_requirements (World_Type, Class_name) VALUES (
'Imperial World','Scum');

INSERT INTO world_class_requirements (World_Type, Class_name) VALUES (
'Imperial World','Tech-Priest');

INSERT INTO world_class_requirements (World_Type, Class_name) VALUES (
'Void Born','Adept');

INSERT INTO world_class_requirements (World_Type, Class_name) VALUES (
'Void Born','Arbitrator');

INSERT INTO world_class_requirements (World_Type, Class_name) VALUES (
'Void Born','Assassin');

INSERT INTO world_class_requirements (World_Type, Class_name) VALUES (
'Void Born','Cleric');

INSERT INTO world_class_requirements (World_Type, Class_name) VALUES (
'Void Born','Imperial Psyker');

INSERT INTO world_class_requirements (World_Type, Class_name) VALUES (
'Void Born','Scum');

INSERT INTO world_class_requirements (World_Type, Class_name) VALUES (
'Void Born','Tech-Priest');

例如，不应允许“熟练”类来自 world_type“野性世界”，但它仍然接受它。

我在这里做错了什么？

Answer 1

我认为问题在于character_ 表没有引用world_class_requirements 表。我认为您需要添加以下关系：

FOREIGN KEY (World_Type, Class) REFERENCES world_class_requirements(World_Type, Class),