nil的未定義方法“保存”：我的應用程式的NilClass

[在此處輸入圖片描述][1]

我不斷收到此錯誤訊息，無法弄清楚為什么會這樣。我相信這是因為@resturant 為零。但我不明白為什么它是零。無論如何要“列印或控制臺記錄”回應，以便我可以看到問題是什么[1]：https ://i.stack.imgur.com/sHUrz.png

這是模型

    class Resturant < ApplicationRecord
    mount_uploader :image, ImageUploader
    serialize :image, JSON # If you use SQLite, add this line
    belongs_to :user, optional: true

    validates :name, :description, :location, :resturant, :glutenfree, :vegan, presence: true
    validates :description, length: {maximum: 1000, too_long: "%{count} characters is the maximum allowed"}

    validates :title, length: {maximum: 140, too_long: "%{count} characters is the maximum allowed"}
end

這是控制器：

class Resturant < ApplicationRecord
    mount_uploader :image, ImageUploader
    serialize :image, JSON # If you use SQLite, add this line
    belongs_to :user, optional: true

    validates :name, :description, :location, :resturant, :glutenfree, :vegan, presence: true
    validates :description, length: {maximum: 1000, too_long: "%{count} characters is the maximum allowed"}

    validates :title, length: {maximum: 140, too_long: "%{count} characters is the maximum allowed"}

結尾

# GET /resturants/new
def new
  @resturant = Resturant.new
end

# GET /resturants/1/edit
def edit
end

# POST /resturants or /resturants.json
def create
  @resturants = Resturant.new(resturant_params)

  respond_to do |format|
    
    if @resturant.save
      format.html { redirect_to resturant_url(@resturant), notice: "Resturant was successfully created." }
      format.json { render :show, status: :created, location: @resturant }
    else
      format.html { render :new, status: :unprocessable_entity }
      format.json { render json: @resturant.errors, status: :unprocessable_entity }
    end
  end
end

# PATCH/PUT /resturants/1 or /resturants/1.json
def update
  respond_to do |format|

    if @resturant.update(resturant_params)
      format.html { redirect_to resturant_url(@resturant), notice: "Resturant was successfully updated." }
      format.json { render :show, status: :ok, location: @resturant }
    else
      format.html { render :edit, status: :unprocessable_entity }
      format.json { render json: @resturant.errors, status: :unprocessable_entity }
    end
  end
end

# DELETE /resturants/1 or /resturants/1.json
def destroy
  @resturant.destroy

  respond_to do |format|
    format.html { redirect_to resturants_url, notice: "Resturant was successfully destroyed." }
    format.json { head :no_content }
  end
end

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

  # Only allow a list of trusted parameters through.
  def resturant_params
    params.require(:resturant).permit(:name, :genre, :description, :location, :glutenfree, :vegan, :image, :resturant)
  end

結尾

uj5u.com熱心網友回復：

你有一個錯字。（看到這些通常需要第二組新的眼睛。）
您在創建操作中不小心使用了復數形式resturant，但后來又使用了單數形式。

你有：

@resturants = Resturant.new(resturant_params)

將其更改為：

@resturant = Resturant.new(resturant_params)

（您還在整個申請中拼錯了“Restaurant”。您是否愿意解決這個問題由您自己決定。我知道我自己因為某些愚蠢的原因拼錯了那個。）

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