Make generated code more explicit for clarity

Created by: gracewashere

Changes:

• Use explicit ruby arrays for TABLE_ATTRIBUTES and FORM_ATTRIBUTES
• Remove the generated READ_ONLY_ATTRIBUTES, which was not used by Administrate and may have been confusing.

Before

require "administrate/base_dashboard"

class ProductDashboard < Administrate::BaseDashboard
  READ_ONLY_ATTRIBUTES = [
    :id,
    :created_at,
    :updated_at,
  ]

  # ATTRIBUTE_TYPES
  # a hash that describes the type of each of the model's fields.
  #
  # Each different type represents an Administrate::Field object,
  # which determines how the attribute is displayed
  # on pages throughout the dashboard.
  ATTRIBUTE_TYPES = {
    id: Field::Number,
    name: Field::String,
    price: Field::Number.with_options(decimals: 2),
    description: Field::String,
    image_url: Field::String,
    created_at: Field::DateTime,
    updated_at: Field::DateTime,
    slug: Field::String,
  }

  # TABLE_ATTRIBUTES
  # an array of attributes that will be displayed on the model's index page.
  #
  # By default, it's limited to four items to reduce clutter on index pages.
  # Feel free to remove the limit or customize the returned array.
  TABLE_ATTRIBUTES = ATTRIBUTE_TYPES.keys.first(4)

  # SHOW_PAGE_ATTRIBUTES
  # an array of attributes that will be displayed on the model's show page.
  SHOW_PAGE_ATTRIBUTES = ATTRIBUTE_TYPES.keys

  # FORM_ATTRIBUTES
  # an array of attributes that will be displayed
  # on the model's form (`new` and `edit`) pages.
  FORM_ATTRIBUTES = ATTRIBUTE_TYPES.keys - READ_ONLY_ATTRIBUTES
end

After

require "administrate/base_dashboard"

class ProductDashboard < Administrate::BaseDashboard
  # ATTRIBUTE_TYPES
  # a hash that describes the type of each of the model's fields.
  #
  # Each different type represents an Administrate::Field object,
  # which determines how the attribute is displayed
  # on pages throughout the dashboard.
  ATTRIBUTE_TYPES = {
    id: Field::Number,
    name: Field::String,
    price: Field::Number.with_options(decimals: 2),
    description: Field::String,
    image_url: Field::String,
    created_at: Field::DateTime,
    updated_at: Field::DateTime,
    slug: Field::String,
  }

  # TABLE_ATTRIBUTES
  # an array of attributes that will be displayed on the model's index page.
  #
  # By default, it's limited to four items to reduce clutter on index pages.
  # Feel free to add, remove, or rearrange items.
  TABLE_ATTRIBUTES = [
    :id,
    :name,
    :price,
    :description,
  ]

  # SHOW_PAGE_ATTRIBUTES
  # an array of attributes that will be displayed on the model's show page.
  SHOW_PAGE_ATTRIBUTES = ATTRIBUTE_TYPES.keys

  # FORM_ATTRIBUTES
  # an array of attributes that will be displayed
  # on the model's form (`new` and `edit`) pages.
  FORM_ATTRIBUTES = [
    :name,
    :price,
    :description,
    :image_url,
    :slug,
  ]
end