Phlexi::Form

Phlexi::Form is a flexible and powerful form builder for Ruby applications. It provides a more customizable and extensible way to create forms compared to traditional form helpers.

Features

• Customizable form components (input, select, checkbox, radio button, etc.)
• Automatic field type and attribute inference based on model attributes
• Built-in support for validations and error handling
• Flexible form structure with support for nested attributes
• Works with Phlex or erb views
• Extract input from parameters that match your form definition. No need to strong paramters.
• Rails compatible form inputs

Installation

Add this line to your application's Gemfile:

gem 'phlexi-form'

And then execute:

$ bundle install

Or install it yourself as:

$ gem install phlexi-form

Usage

There are 2 ways to use Phlexi::Form:

Direct Usage

Phlexi::Form(User.new) do
  field(:name) do |name|
    render name.label_tag
    render name.input_tag
  end

  field(:email) do |email|
    render email.label_tag
    render email.input_tag
  end

  nest_one(:address) do |address|
    address.field(:street) do |street|
      render street.label_tag
      render street.input_tag
    end

    address.field(:city) do |city|
      render city.label_tag
      render city.input_tag
    end
  end

  render submit_button
end

Important

If you are rendering your form inline e.g.

render Phlexi::Form(User.new) {
  render field(:name).label_tag
  render field(:name).input_tag
}

Make sure you use {...} in defining your block instead of do...end This might be fixed in a future version.

Inherit form

class UserForm < Phlexi::Form::Base
  def form_template
    field(:name) do |name|
      render name.label_tag
      render name.input_tag
    end

    field(:email) do |email|
      render email.label_tag
      render email.input_tag
    end

    nest_one(:address) do |address|
      address.field(:street) do |street|
        render street.label_tag
        render street.input_tag
      end

      address.field(:city) do |city|
        render city.label_tag
        render city.input_tag
      end
    end

    render submit_button
  end
end


# In your view or controller
form = UserForm.new(User.new)

# Render the form
render form

# Extract params
form.extract_input({
  name: "Brad Pitt",
  email: "brad@pitt.com",
  address: {
    street: "Plumbago",
    city: "Accra",
  }
})

Advanced Usage

Custom Components

You can create custom form components by inheriting from Phlexi::Form::Components::Base:

class CustomInput < Phlexi::Form::Components::Base
  def template
    div(class: "custom-input") do
      input(**attributes)
      span(class: "custom-icon")
    end
  end
end

# Usage in your form
field(:custom_field) do |field|
  render CustomInput.new(field)
end

Theming

Phlexi::Form supports theming through a flexible theming system:

class ThemedForm < Phlexi::Form::Base
  class FieldBuilder < FieldBuilder
    private

    def default_theme
      {
        input: "border rounded px-2 py-1",
        label: "font-bold text-gray-700",
        # Add more theme options here
      }
    end
  end
end

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/radioactive-labs/phlexi-form.

License

The gem is available as open source under the terms of the MIT License.