Play framework 2.0:使用简单模型进行H2 DB演变

Question

我试图创建一个简单的控制器/模型(基于播放2.0的示例代码)并获得有关DB演变的消息:

Database 'default' needs evolution!

An SQL script will be run on your database - "Apply this script now"

1 # --- Rev:1,Ups - fbdc2fd
2 create table group (
3 id                        bigint not null,
4 name                      varchar(255),
5 description               varchar(255),
6 due_date                  timestamp,
7 constraint pk_group primary key (id))
8 ;
9 
10 create sequence group_seq;

但是当点击按钮时,我收到以下错误消息:

Database 'default' is in inconsistent state!

An evolution has not been applied properly. Please check the problem and resolve it manually before making it as resolved 

We got the following error: SQL?????????????????? "CREATE TABLE GROUP[*] ( ID BIGINT NOT NULL, NAME VARCHAR(255), DESCRIPTION VARCHAR(255), DUE_DATE TIMESTAMP, CONSTRAINT PK_GROUP PRIMARY KEY (ID)) "; ???????????? "identifier" Syntax error in SQL statement "CREATE TABLE GROUP[*] ( ID BIGINT NOT NULL, NAME VARCHAR(255), DESCRIPTION VARCHAR(255), DUE_DATE TIMESTAMP, CONSTRAINT PK_GROUP PRIMARY KEY (ID)) "; expected "identifier"; SQL statement: create table group ( id bigint not null, name varchar(255), description varchar(255), due_date timestamp, constraint pk_group primary key (id)) [42001-158] [ERROR:42001, SQLSTATE:42001], while trying to run this SQL script:

 1# --- Rev:1,Ups - fbdc2fd
2
3 create table group (
4 id                        bigint not null,
5 name                      varchar(255),
6 description               varchar(255),
7 due_date                  timestamp,
8 constraint pk_group primary key (id))
9 ;
10
11 create sequence group_seq;

我的配置文件

#DB setting
db.default.driver=org.h2.Driver
db.default.url="jdbc:h2:mem:play"

# Ebean configuration
ebean.default="models.*"

我的控制器

public class Application extends Controller {

    /**
     * 
     * @return
     */
  public static Result index() {

      Group g = new Group("New group Test","This is a test !");
      g.save();

    return ok(index.render("Render page"));
  }

}

最后我的模型:

@Entity
public class Group extends Model {

    public static Finder<Long,Group> find = new Finder (Long.class, Group.class);

    @Id
    public Long id;

    @Required
    public String name;

    @Required
    public String description;

    @DateTime(pattern = "MM/dd/yy")
    public Date dueDate;


    /**
     *  ToString method
     */
    public String toString() {
        return "Group(" + id + ") in project " + name;
        }


    /**
     *  Constructor
     * @param name
     * @param description
     */
    public Group(String name, String description){
            this.name=name;
            this.description=description;
    }

}

有人遇到同样的问题？谢谢 !

Answer 1

可能是您的表(组)的名称是问题,因为它是一个SQL关键字.尝试引用表名("group")或测试如果使用不同的表名会发生什么.