标签: ebean

我在后面使用ebean作为ORM和SQL Server.当我尝试setMaxRows时,我得到了SQL语法错误的例外.生成的sql有类似的东西

select .... from ... where ... LIMIT 5

虽然这可能适用于mysql,但SQLServer不喜欢它.

经过一些搜索后,我发现EBean,LimitOffsetSqlLimiter使用的默认SqlLimiter创建了这样的sql.我想知道我是否可以配置ebean,以便它可以使用其他实现,如RowNumberSqlLimiter,甚至我自己的实现,如这里提到的？

所以我有以下代码.我正在尝试创建一个名为SecurityType的表,其中包含值ID和描述.我想在其中添加两个字符串"Administrator"和"user".有没有办法可以将这两个排除在ebean表中的列之外？还是我需要搬到另一个班级？

@Entity
public class SecurityType extends Model {
    public static final String ADMIN = "Administrator";
    public static final String USER = "User";
    @Id
    public Long id;

    public String description;
}

我在尝试将数据保存到db中的模型时收到此错误.

@Entity
public class User extends Model {
   @Required
   public String name; 
   @Email
   public String email; 
   @Required @MaxLength(value=10)
   public String username;
   @Required @MinLength(value=4)
   public String password;
   @Id 
   public int id;
}

这是我的班级.

当我试图将模型保存到db时,这是错误.

我将不胜感激任何帮助!非常感谢.

编辑:表结构在这里

使用Play Framework,我有一个这样的模型:

class MyModel extends Model {
    // Some columns

    @ManyToOne
    public OtherModel other;

    public OtherModel getOther() {
        return other;
    }
}

出于某种原因我无法理解,如果我调用myModel.otherOR myModel.getOther()(myModel作为实例MyModel),我得到一个Null值,即使它应该返回OtherModel的实例!

而且,如果我将getOther()方法更改为:

public OtherModel getOther() {
    console.log (String.valueOf(other));
    return other;
}

getOther() 返回预期的实例 OtherModel

我只想说......是...... WTF？

有人可以向我解释为什么,以及如何解决这种奇怪的行为？

谢谢 :)

我有一个像这样的ManyToMany-Association:

@Entity
public class User extends Model implements RoleHolder {
  @ManyToMany(cascade=CascadeType.ALL) 
  public List<Task> tasks;
}

然后我这样做:

User u = Application.getLocalUser(session());
u.tasks.clear();
for (Task t : tasksToAdd)
  u.tasks.add(t);
u.saveManyToManyAssociations("tasks");
u.update()

但是当我尝试在Controller-Action中读取Collection时,只有一个"BeanList deferred"-Message

User u = Application.getLocalUser(session());       
return ok(tasks.render(u.tasks));

谢谢您的帮助

我的简化模型如下所示:

@Entity public class Aspect extends Model {
    @Id public Long id;
    @OneToMany(cascade = CascadeType.ALL) public List<Restriction> restrictions;
}

@Entity public class Restriction extends Model {
    @Id public Integer id;
    @ManyToOne public RestrictionTemplate restrictionTemplate;
}

@Entity public class RestrictionTemplate extends Model {
    @Id private Integer id;
}

基本上这个想法是这样的:每个Aspect都有一组限制.每个限制本身都依赖于RestrictionTemplate.

我希望Aspect创建表单是这样的:用户可以选择一些RestrictionTemplates,并在表单上提交新的限制应该创建并与新的Aspect相关联.

让我再次解释一下:在表单提交上,我想根据提供的RestrictionTemplate ids 创建Aspect和相关限制.

表格中的字段应该具有哪些名称才能使这种绑定成为可能？

适用于直接关系的命名:

restrictions[0].restrictionTemplate.id
restrictions[1].restrictionTemplate.id

在这里不起作用(在DB中创建Aspect …

我有一个查询,我想在我的产品模型中写

select * from shop inner join product on product.shops_id=shop.id where product.name=keyword

Shop.java

public class Shop extends Model {

    @Id
    @SequenceGenerator(name="shop_gen", sequenceName="shop_id_seq", allocationSize=1)
    @GeneratedValue(strategy=GenerationType.SEQUENCE, generator="shop_gen")
    @Column(name="id")
    public Long id;

    @Required
    public String name;

    @Required
    public String addressLine1;

    public String addressLine2;

    public String addressLine3;

    @Required
    public String city;

    @Required
    public String town;

    @Required
    public String phoneNumber;

    @OneToMany(mappedBy = "shops",cascade = CascadeType.REMOVE)
    public List<Product> products=new ArrayList<>();


    @Required
    @OneToOne
    public String category;

    @Lob
    @Column(name = "shop_pic")
    public  byte[] shop_pic;


    @ManyToOne
    @Required
    public User …

我有两个模型类

客户账户

@Entity
public class CustomerAccount extends Model {
    @Id
    @Column(columnDefinition = "int(11)")
    public int customer_id;
    @Column(columnDefinition = "varchar(50) not null unique")
    public String customer_email;
    @Column(columnDefinition = "varchar(50) not null")
    public String password;
}

顾客

@Entity
public class Customer extends Model {

    @Column(columnDefinition = "int(11) unique")
    public int customer_id = 6;
    @Column(columnDefinition = "varchar(50) not null")
    public String customer_fname;
    @Column(columnDefinition = "varchar(50) not null")
    public String customer_lname;
    @Column(columnDefinition = "varchar(50) unique not null")
    public String email = "";
}

现在我想在表CustomerAccount引用Customer表中添加一个foriegn键,如: …

   Posts Model

  /*set many to one relation with Privacy_Level model*/
  @ManyToOne//(fetch = FetchType.LAZY)
  @JoinColumn(name = "privacy_level_id",referencedColumnName = "id", insertable = false, updatable = false)
  public Privacy_Level privacy_level_t;

-------------------------------------------------------------------------------------------------------------
  Privacy_Level Model

  /*set one to many relation with Posts model*/
  @OneToMany(mappedBy = "privacy_level_t")
  public List<Posts> posts;

  /*set many to one relation with Table_Status model*/
  @ManyToOne
  @JoinColumn(name = "status",referencedColumnName = "id", insertable = false, updatable = false)
  public Table_Status table_status;
--------------------------------------------------------------------------------------------------------------
  Table_Status Model

  /*set many to one relation with Privacy_level table*/
  @OneToMany(mappedBy = …

我有一个基于Play框架Scala 2.11.1版本的应用程序。我想为其添加单元测试的方法有几种。这些方法通过Ebean直接调用数据库。

我尝试使用此链接使用嘲笑-ebean来模拟这些调用。但是导入不成功

我也尝试过powermock。但是它需要为模拟调用设置内存中的ebean服务器。但是不建议将其设置为用于单元测试的内存服务器。

知道下一个方向是什么？