RailsAPI控制器更新操作——如何添加多對多

我有一個提供 Vue 前端的 Rails Api。我有兩個主要模型，Contacts 和 Outlets，通過連接表 ContactOutlets 建立多對多關系。我試圖弄清楚如何在聯系人控制器中將關聯添加到插座。

我知道，我可以單獨呼叫 ContactOutlet create 操作，但是如果 Rails 可以在后端處理這個操作似乎很浪費。我想讓 vue 呼叫一次contact#update。

聯系方式：

class Contact < ApplicationRecord
  has_many :contact_outlets
  has_many :outlets, through: :contact_outlets
  has_many :calls

  validates_uniqueness_of :email
  validates_uniqueness_of :name

end

出口型號：

class Outlet < ApplicationRecord
  has_many :contact_outlets
  has_many :contacts, through: :contact_outlets
  has_many :calls

  validates_uniqueness_of :website
end

聯系方式：

class ContactOutlet < ApplicationRecord
  belongs_to :contact
  belongs_to :outlet

  validates_uniqueness_of :contact_id, :scope => :outlet_id
end

聯系人控制器：

class ContactsController < ApplicationController
  before_action :set_contact, only: %i[ show update destroy ]

  # GET /contacts
  def index
    @contacts = Contact.all

    render json: @contacts, include: :outlets
  end

  # GET /contacts/1
  def show
    render json: @contact, include: :outlets
  end

  # POST /contacts
  def create
    @contact = Contact.new(contact_params)

    if @contact.save
      render json: @contact, status: :created, location: @contact
    else
      render json: @contact.errors, status: :unprocessable_entity
    end
  end

  # PATCH/PUT /contacts/1
  def update
    if @contact.update(contact_params)
      render json: @contact, include: :outlets
    else
      render json: @contact.errors, status: :unprocessable_entity
    end
  end

  # DELETE /contacts/1
  def destroy
    @contact.destroy
  end

  private
    # Use callbacks to share common setup or constraints between actions.
    def set_contact
      @contact = Contact.find(params[:id])
    end

    # Only allow a list of trusted parameters through.
    def contact_params
      params.require(:contact).permit(:name, :email, :bio, :image_url)
    end
end

uj5u.com熱心網友回復：

解決了這個問題。如果其他人在看上面的模型就可以了。對 contact_params 進行了一些調整，以允許訪問 outlets 陣列。然后修復了更新操作。完整的控制器代碼如下：

class ContactsController < ApplicationController
  before_action :set_contact, only: %i[ show update destroy ]

  # GET /contacts
  def index
    @contacts = Contact.all

    render json: @contacts, include: :outlets
  end

  # GET /contacts/1
  def show
    render json: @contact, include: :outlets
  end

  # POST /contacts
  def create
    @contact = Contact.new(contact_params)

    if @contact.save
      render json: @contact, status: :created, location: @contact
    else
      render json: @contact.errors, status: :unprocessable_entity
    end
  end

  # PATCH/PUT /contacts/1
  def update
    if @contact.outlets
      @contact.outlets.delete_all
    end
    if params[:outlets]
      contactOutlets = params[:outlets]
      contactOutlets.each do |outlet|
        @contact.outlets << Outlet.find(outlet[:key])
      end
    end
    if @contact.update(contact_params)
      render json: @contact, include: :outlets
    else
      render json: @contact.errors, status: :unprocessable_entity
    end
  end

  # DELETE /contacts/1
  def destroy
    @contact.destroy
  end

  private
    # Use callbacks to share common setup or constraints between actions.
    def set_contact
      @contact = Contact.find(params[:id])
    end

    # Only allow a list of trusted parameters through.
    def contact_params
      params.require(:contact).permit(:name, :email, :bio, :image_url, outlet_ids:[])
    end
end

標籤：轨道上的红宝石 多对多 rails-api

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