How to Use Form Validations in Dialog with NitroKit

I’ve ran into issues trying to validate form inside dialog component using NitroKit UI components. The dialog kept closing on every submission, the solution that worked was wraping form in turbo_frame_tag.

# the controller
class PostsController < ApplicationController
    ...

    def new
    @post = Post.new
    end

    def create
    @post = Post.new(post_params)

        if @post.save
        ...
        else
        respond_to do |format|
            format.turbo_stream do
            render turbo_stream: turbo_stream.replace("post_form",
                                                        partial: 'form',
                                                        locals: { post: @post })
            end
        end
        end

    end
    ...
end

On save error, the controller renders form with errors via turbo stream, without refreshing the page or closing the dialog.

# the form partial
<%= turbo_frame_tag "post_form" do %>
    <%= nk_form_with model: post, url: request.path do |f| %>
        ...
    <% end %>
<% end %>

The same form partial is used by controller when rendering error and by dialog component when trigger button is clicked

# the dialog component
<%= nk_dialog do |d| %>
    <%= d.trigger "Add Post", variant: :primary %>
        <%= d.dialog do %>
        <%= render 'form', post: @post %>
        <%= d.close_button %>
    <% end %>
<% end %>

and the model has the usual rails validations.