[RUBY] What to do if validation doesn't work with the update action

environment

What you want to implement

Reflect validation in the ╩╗update action of controller.rb`.

Cause

It is written from @ post.valid? in the if statement of error handling of the update action. With this writing method, validation will be effective for information that has already been registered.

post_controller.rb


def update
    if @post.valid?
      @post.update(post_params)
      flash[:notice] = "Editing is complete"
      redirect_to post_path(@post.id)
    else
      flash.now[:alert] = "Editing failed"
      render :edit
    end
  end

Solution

By starting writing from @ post.update (post_params), validation will work normally even with updates.

post_controller.rb


def update
    if @post.update(post_params)
      flash[:notice] = "Editing is complete"
      redirect_to post_path(@post.id)
    else
      flash.now[:alert] = "Editing failed"
      render :edit
    end
  end

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