【问题标题】:Grails Spring Security querying users which don't have a certain roleGrails Spring Security 查询没有特定角色的用户
【发布时间】:2015-11-01 10:28:42
【问题描述】:

使用Grails spring security REST(它本身使用Grails Spring Security Core)我生成了UserRoleUserRole 类。

用户:

class User extends DomainBase{

    transient springSecurityService

    String username
    String password
    String firstName
    String lastNameOrTitle
    String email
    boolean showEmail
    String phoneNumber
    boolean enabled = true
    boolean accountExpired
    boolean accountLocked
    boolean passwordExpired

    static transients = ['springSecurityService']

    static hasMany = [
            roles: Role,
            ratings: Rating,
            favorites: Favorite
    ]

    static constraints = {
        username blank: false, unique: true
        password blank: false
        firstName nullable: true, blank: false
        lastNameOrTitle nullable: false, blank: false
        email nullable: false, blank: false
        phoneNumber nullable: true
    }

    static mapping = {
        DomainUtil.inheritDomainMappingFrom(DomainBase, delegate)
        id column: 'user_id', generator: 'sequence', params: [sequence: 'user_seq']
        username column: 'username'
        password column: 'password'
        enabled column: 'enabled'
        accountExpired column: 'account_expired'
        accountLocked column: 'account_locked'
        passwordExpired column: 'password_expired'
        roles joinTable: [
                name: 'user_role',
                column: 'role_id',
                key: 'user_id']
    }

    Set<Role> getAuthorities() {
//        UserRole.findAllByUser(this).collect { it.role }
//        userRoles.collect { it.role }
        this.roles
    }

    def beforeInsert() {
        encodePassword()
    }

    def beforeUpdate() {
        super.beforeUpdate()
        if (isDirty('password')) {
            encodePassword()
        }
    }

    protected void encodePassword() {
        password = springSecurityService?.passwordEncoder ? springSecurityService.encodePassword(password) : password
    }
}

角色:

class Role {

    String authority

    static mapping = {
        cache true
        id column: 'role_id', generator: 'sequence', params: [sequence: 'role_seq']
        authority column: 'authority'
    }

    static constraints = {
        authority blank: false, unique: true
    }
}

用户角色:

class UserRole implements Serializable {

    private static final long serialVersionUID = 1

    static belongsTo = [
            user: User,
            role: Role
    ]
//    User user
//    Role role

    boolean equals(other) {
        if (!(other instanceof UserRole)) {
            return false
        }

        other.user?.id == user?.id &&
                other.role?.id == role?.id
    }

    int hashCode() {
        def builder = new HashCodeBuilder()
        if (user) builder.append(user.id)
        if (role) builder.append(role.id)
        builder.toHashCode()
    }

    static UserRole get(long userId, long roleId) {
        UserRole.where {
            user == User.load(userId) &&
                    role == Role.load(roleId)
        }.get()
    }

    static boolean exists(long userId, long roleId) {
        UserRole.where {
            user == User.load(userId) &&
                    role == Role.load(roleId)
        }.count() > 0
    }

    static UserRole create(User user, Role role, boolean flush = false) {
        def instance = new UserRole(user: user, role: role)
        instance.save(flush: flush, insert: true)
        instance
    }

    static boolean remove(User u, Role r, boolean flush = false) {
        if (u == null || r == null) return false

        int rowCount = UserRole.where {
            user == User.load(u.id) &&
                    role == Role.load(r.id)
        }.deleteAll()

        if (flush) {
            UserRole.withSession { it.flush() }
        }

        rowCount > 0
    }

    static void removeAll(User u, boolean flush = false) {
        if (u == null) return

        UserRole.where {
            user == User.load(u.id)
        }.deleteAll()

        if (flush) {
            UserRole.withSession { it.flush() }
        }
    }

    static void removeAll(Role r, boolean flush = false) {
        if (r == null) return

        UserRole.where {
            role == Role.load(r.id)
        }.deleteAll()

        if (flush) {
            UserRole.withSession { it.flush() }
        }
    }

    static constraints = {
        role validator: { Role r, UserRole ur ->
            if (ur.user == null) return
            boolean existing = false
            UserRole.withNewSession {
                existing = UserRole.exists(ur.user.id, r.id)
            }
            if (existing) {
                return 'userRole.exists'
            }
        }
    }

    static mapping = {
        id composite: ['role', 'user']
        version false
    }
}

现在我希望创建一个管理员区域,管理员可以在其中修改/启用用户帐户,但不能接触其他管理员,因此我决定创建一个可分页查询,它只选择不这样做的用户拥有ROLE_ADMIN 角色,因为管理员同时拥有ROLE_USERROLE_ADMIN 角色。

从上面的代码可以看出,我稍微修改了默认生成的代码,并在User 类中添加了joinTable,而不是hasMany: [roles:UserRole],或者保持默认而不引用角色.进行此更改的原因是因为在查询 UserRole 时,我偶尔会遇到重复,这会使分页变得困难。

因此,通过当前的设置,我设法创建了两个查询,允许我仅获取没有管理员角色的用户。

def rolesToIgnore = ["ROLE_ADMIN"]
def userIdsWithGivenRoles = User.createCriteria().list() {
    projections {
        property "id"
    }
    roles {
        'in' "authority", rolesToIgnore
    }
}

def usersWithoutGivenRoles = User.createCriteria().list(max: 10, offset: 0) {
    not {
        'in' "id", userIdsWithGivenRoles
    }
}

第一个查询获取所有具有ROLE_ADMIN 角色的用户 id 的列表,然后第二个查询获取所有 id 不在前一个列表中的用户。

这可行并且是可分页的,但是它困扰我有两个原因:

  1. 用户上的joinTable 对我来说似乎“恶心”。为什么要使用joinTable 当我已经有一个特定的类用于该目的UserRole,但是该类更难查询,我担心为每个找到的Role 映射Role 可能的开销@ 987654341@ 即使我只需要User
  2. 两个查询,只能分页第二个。

所以我的问题是: 是否有更优化的方法来构造查询以获取不包含某些角色的用户(无需将数据库重组为每个用户只有一个角色的金字塔角色系统)?

两个查询是绝对必要的吗?我试图构建一个纯 SQL 查询,但如果没有子查询,我就无法做到。

【问题讨论】:

    标签: hibernate grails spring-security grails-orm


    【解决方案1】:

    你可以这样做:

    return UserRole.createCriteria().list {
        distinct('user')
        user {
            ne("enabled", false)
        }
        or {
            user {
                eq('id', springSecurityService.currentUser.id)
            }
            role {
                not {
                    'in'('authority', ['ADMIN', 'EXECUTIVE'])
                }
            }
        }
    }
    

    使用distinct('user'),您只会得到Users

    【讨论】:

      【解决方案2】:

      如果你的 UserRoleuser 和角色 properties 而不是 belongsTo,像这样:

      class UserRole implements Serializable {
      
          private static final long serialVersionUID = 1
      
          User user
          Role role
          ...
      }
      

      那么你可以这样做:

      def rolesToIgnore = ["ROLE_ADMIN"]
      
      def userIdsWithGivenRoles = UserRole.where {
          role.authority in rolesToIgnore
      }.list().collect { it.user.id }.unique()
      
      def userIdsWithoutGivenRoles = UserRole.where {
          !(role.authority in rolesToIgnore)
      }.list().collect { it.user.id }.unique()
      

      我不擅长预测,所以我使用 unique() 删除重复项。

      SQL 等价物是:

      SELECT DISTINCT ur.user_id
      FROM    user_role AS ur INNER JOIN role AS r
              ON ur.authority_id = r.id
      WHERE   r.authority IN ('ROLE_ADMIN');
      
      SELECT DISTINCT ur.user_id
      FROM    user_role AS ur INNER JOIN role AS r
              ON ur.authority_id = r.id
      WHERE   r.authority NOT IN ('ROLE_ADMIN');
      

      【讨论】:

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