rails 4 ActiveModel::ForbiddenAttributesError [duplicate]

Answer 1

Your's should look like this:

def new
    @ad = Ad.new(params[:ad].permit(:title, :price, :description))
end

Mine looks like this:

def create
    @about = About.new(params[:about].permit(:introduction, :description))

    respond_to do |format|
        if @about.save
            format.html { redirect_to @about, notice: 'About was successfully created.' }
            format.json { render action: 'show', status: :created, location: @about }
        else
            format.html { render action: 'new' }
            format.json { render json: @about.errors, status: :unprocessable_entity }
        end
    end
end