Play 2.1框架未檢測到進化變化

Question

在兩個模型（本例中爲User和Article模型[1]）上添加@ManyToMany連接表後，Play會正確檢測這些更改並相應地修改1.sql [2]文件：

[1] 
+ @ManyToMany 
+ public List<User> authors; 

+ @ManyToMany(mappedBy="authors") 
+ public List<Article> authoredArticles; 

[2] 
+ create table articles_users (
+  articles_id     bigint not null, 
+  users_id      bigint not null, 
+  constraint pk_articles_users primary key (articles_id, users_id) 
+ ); 

+ alter table articles_users add constraint fk_articles_users_articles_01 foreign key (articles_id) references articles (id); 
+ alter table articles_users add constraint fk_articles_users_users_02 foreign key (users_id) references users (id); 

# --- !Downs 

+ drop table if exists articles_users cascade; 

但是打開使用這種關係頁面時，將顯示演變需要申請，而不是呈現以下錯誤無消息：

PersistenceException: Query threw SQLException:ERROR: relation "articles_users" does not exist 

爲什麼玩不檢測，它已經做了修改需要應用的數據庫模式？

Answer 1

檢查play_evolutions表，如果已經有id爲1的行，則必須將sql文件重命名爲2.sql或手動刪除表。