Question

class User < ActiveRecord::Base
    has_many :assignments
    has_many :projects, through: :assignments
end

class Project < ActiveRecord::Base
    has_many :assignments
    has_many :users, through: :assignments
end

class Assignment < ActiveRecord::Base
    belongs_to :user
    belongs_to :project
    scope :current_assignments, where(...)
end

我想获得当前分配给当前用户的所有项目。类似的东西：

current_user.current_assigned_projects

但是现在，我必须这样做：

current_user.assignments.current_assignments.map{ |a| a.project }.uniq

或

Project.includes(:users, :assignments).where('assignments.status' => 1, 'users.id' => current_user.id)

有没有什么好方法可以做到这一点？

Answer 1

像

这样的东西

class User < ActiveRecord::Base
   has_many :assignments
   has_many :projects, through: :assignments
   has_many :current_projects, conditions: 'assignments.status = 1', through: :assignments
end

应该有效。或者至少我希望如此;）

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