You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: validations_controller.rb
    path of file: ./repos/form_core/test/dummy/app/controllers/fields
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

    
  def edit; end

  def update
    @validations.assign_attributes(validations_params)
    if @validations.valid? && @field.save(validate: false)
      redirect_to fields_url, notice: "Field was successfully updated."
    else
      render :edit
    end
  end