Question

我有角色的用户：admin，manager，cashier。用户模型与员工模型的关系。

员工belongs_to用户和用户has_many员工

在新表格员工中，我使用了这种方法

<%= form_for @employee, remote: true, html: {role: "form", multipart: true} do |f| %>
  <div class="form-group">
    <%= f.label :user_id, 'User', class: "exampleInputEmail1" %>
    <%= f.select :user_id, options_for_select(@users.map {|u|[u.name, u.id]}, f.object.user_id), {prompt: "Select User"}, class: "form-control" %>
  </div>

使用上面的方法，我得到了所有用户。但我想只过滤角色＆＃34; admin＆＃34;在选择。怎么做到的？

修改

employees_controller

新建并创建行动

  def new
    @employee = Employee.new
    @users = User.all
  end

  def create
    @employee = Employee.new(employee_params)
    @users = User.all
    respond_to do |format|
      if @employee.save
        format.html { redirect_to employees_path, notice: 'Employee was successfully created.' }
        format.json { render :show, status: :created, location: @employee }
        format.js
      else
        format.html { render :new }
        format.json { render json: @employee.errors, status: :unprocessable_entity }
      end
    end
  end

修改2

忘记添加此内容。关系用户和角色。

class User < ActiveRecord::Base
  has_many :user_roles, :dependent => :destroy
  has_many :roles, :through => :user_roles
end

class Role < ActiveRecord::Base
  has_many :user_roles, :dependent => :destroy
  has_many :users, :through => :user_roles
end

编辑3

schema.rb

  create_table "roles", force: :cascade do |t|
    t.string   "name"
    t.datetime "created_at", null: false
    t.datetime "updated_at", null: false
  end

  add_index "roles", ["name"], name: "index_roles_on_name", unique: true, using: :btree

  create_table "user_roles", force: :cascade do |t|
    t.integer  "user_id"
    t.integer  "role_id"
    t.datetime "created_at", null: false
    t.datetime "updated_at", null: false
  end

  add_index "user_roles", ["role_id"], name: "index_user_roles_on_role_id", using: :btree
  add_index "user_roles", ["user_id"], name: "index_user_roles_on_user_id", using: :btree

  create_table "users", force: :cascade do |t|
    t.string   "name"
    t.string   "gender"
    t.string   "username"
    t.string   "email"
    t.string   "salt"
    t.string   "encrypted_password"
    t.string   "auth_token"
    t.string   "password_reset_token"
    t.datetime "password_reset_sent_at"
    t.datetime "created_at",             null: false
    t.datetime "updated_at",             null: false
  end

  add_index "users", ["email"], name: "index_users_on_email", unique: true, using: :btree
  add_index "users", ["username"], name: "index_users_on_username", unique: true, using: :btree

  add_foreign_key "user_roles", "roles"
  add_foreign_key "user_roles", "users"

  create_table "employees", force: :cascade do |t|
    t.string   "employee_code"
    t.string   "name"
    t.string   "age"
    t.string   "address"
    t.string   "telp"
    t.datetime "created_at",    null: false
    t.datetime "updated_at",    null: false
    t.integer  "user_id"   
  end

Answer 1

编辑。

您可以使用以下方式浏览管理员：

@user.roles.where(name: 'Admin')

这假设您的Role类已将角色存储在名为＆＃34; Name＆＃34;的列中。并且给管理员的名称是＆＃34; Admin＆＃34; - 如果没有，则用（your_role_column：＆＃39;您的管理员名称＆＃39;）替换括号内部。

Answer 2

更好的方法是使用范围：

模特中的

：

db.delete("TABLE_NAME", null, null);

控制器中的

：

scope :admins, ->{ where(name: 'Admin') }

按选择轨道上的角色过滤用户

2 个答案: