Ransack：通過關聯搜索has_many

Question

我是Rails的新手，與Ransack有問題：

這是模型項目

 class Project < ApplicationRecord
  searchkick
  belongs_to :company
  belongs_to :m_category
  has_many :project_industries, dependent: :destroy
  has_many :m_industries, through: :project_industries

end

這是模特行業：

 class Industry < ApplicationRecord
  include M
  belongs_to :m_industry_category
  has_many :project_industries, dependent: :destroy, foreign_key: :industry_id
  has_many :projects, through: :project_industries
end

這是模型IndustryCategory：

 class IndustryCategory < ApplicationRecord
  has_many :industries, dependent: :destroy,
    foreign_key: :industry_category_id

  has_many :projects, through: :industries
end

現在，我想通過IndustryCategory搜索Project，但我不知道如何。 請幫我！！ TKS

Answer 1

你可以使用這樣的東西

@industrty_category = IndustryCategory.find(params[:id])

@project = @industry_category.projects.all