`

#{identityManager.deleteUser(userSearch.selectedUser)}

阅读更多

  (1)在seamspace里面的userList的页面中,只用

<h:dataTable 
            id="threads"
            value="#{users}" 
            var="user" 
            styleClass="security"
            cellspacing="0"
            headerClass="header"
            rowClasses="odd,even"
            columnClasses=",,enabled,action">
          <h:column width="auto">
            <f:facet name="header">
              User name
            </f:facet>
            #{user}
          </h:column>
          
          <h:column width="auto">
            <f:facet name="header">
              Action
            </f:facet>
            
            <s:link value="Delete" action="#{identityManager.deleteUser(userSearch.selectedUser)}" 
                    rendered="#{s:hasPermission('seam.user', 'delete')}"
                    />
          </h:column>
 </h:dataTable>

 

value="#{users}" 这样就可以把所有的user全部列出来。如果这里谁有疑问的可以问我,呵呵。

另外在删除的时候identityManager.deleteUser(userSearch.selectedUser)这样就可以轻而易举的删除。

     (2) 我想表达的意思是我自己CMS项目的userList.xhtml有自己的业务逻辑在里面不可能象它这样就可以搞定。我的所有功能我都实现了,现在就剩下删除的功能没有实现。

       因为表有依赖关系在里面所有简单的删除不行。必须先删除user_role表中数据,再删除users表中数据。

但是要用它的那个方法identityManager.deleteUser(userSearch.selectedUser),这种条件是必须用value="#{users}"把所有的users列出来,才能用它。所有我就只能抛弃这样的方法,自己去找了。

     (3)我自己写:

<s:link id="delete" value="Delete"  onclick="JavaScript:if(confirm('Are you sure to delete it?')){return true;}else{return false;}"
	action="#{usersHome.remove}" rendered="true"
	view="/usersadmin/UsersList.xhtml">
        <f:param name="usersId" value="#{_users.id}" />
</s:link>

 我来覆盖掉@Override public String remove(){}方法。但是我在写删除的时候发现这个表user_role没有对应的实体给它,所有用实体对应的删除方法也行不通了。

   (4) 我想用eclipse反向从数据库里面生成实体,把中间表user_role的实体弄出来。结果还是没有达到我要的目的。因为user_role表只有2个字段是:user_id和role_id,且它们一起作为主键。这我就没有见过了。晕死了!! 结果我反向生成的实体,你知道生成了什么吗? 下面是实体的内容。

package org.domain.entityTest.entity;

// Generated 2009-9-10 15:41:59 by Hibernate Tools 3.2.2.GA

import javax.persistence.AttributeOverride;
import javax.persistence.AttributeOverrides;
import javax.persistence.Column;
import javax.persistence.EmbeddedId;
import javax.persistence.Entity;
import javax.persistence.Table;
import org.hibernate.validator.NotNull;

/**
 * UsersRole generated by hbm2java
 */
@Entity
@Table(name = "users_role", catalog = "cms")
public class UsersRole implements java.io.Serializable {

	private UsersRoleId id;

	public UsersRole() {
	}

	public UsersRole(UsersRoleId id) {
		this.id = id;
	}

	@EmbeddedId
	@AttributeOverrides( {
			@AttributeOverride(name = "usersId", column = @Column(name = "users_id", nullable = false)),
			@AttributeOverride(name = "roleId", column = @Column(name = "role_id", nullable = false)) })
	@NotNull
	public UsersRoleId getId() {
		return this.id;
	}

	public void setId(UsersRoleId id) {
		this.id = id;
	}

}

 

package org.domain.entityTest.entity;

// Generated 2009-9-10 15:41:59 by Hibernate Tools 3.2.2.GA

import javax.persistence.Column;
import javax.persistence.Embeddable;
import org.hibernate.validator.NotNull;

/**
 * UsersRoleId generated by hbm2java
 */
@Embeddable
public class UsersRoleId implements java.io.Serializable {

	private long usersId;
	private long roleId;

	public UsersRoleId() {
	}

	public UsersRoleId(long usersId, long roleId) {
		this.usersId = usersId;
		this.roleId = roleId;
	}

	@Column(name = "users_id", nullable = false)
	@NotNull
	public long getUsersId() {
		return this.usersId;
	}

	public void setUsersId(long usersId) {
		this.usersId = usersId;
	}

	@Column(name = "role_id", nullable = false)
	@NotNull
	public long getRoleId() {
		return this.roleId;
	}

	public void setRoleId(long roleId) {
		this.roleId = roleId;
	}

	public boolean equals(Object other) {
		if ((this == other))
			return true;
		if ((other == null))
			return false;
		if (!(other instanceof UsersRoleId))
			return false;
		UsersRoleId castOther = (UsersRoleId) other;

		return (this.getUsersId() == castOther.getUsersId())
				&& (this.getRoleId() == castOther.getRoleId());
	}

	public int hashCode() {
		int result = 17;

		result = 37 * result + (int) this.getUsersId();
		result = 37 * result + (int) this.getRoleId();
		return result;
	}

}

 竟然有2个实体,这个我从来没有见过的。所有在后面写remove方法的时候写不出来。

(5) 最后终于想出来办法了。

@Override
	public String remove(){
		if(this.usersId != null && !"".equals(this.usersId)){
			entityManager.createNativeQuery("delete ur.* from users_role ur where ur.users_id="+this.usersId).executeUpdate();
			
			removeUser = entityManager.find(Users.class, this.usersId);
			entityManager.remove(removeUser);
		}
		return "removed";
}

 

直接用entityManager的createNativeQuery本地SQL语句就可以搞定了。

      依次谨献:我本人。哈哈! 以后可以回顾。

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