Module: ActiveScaffold::Helpers::FormColumnHelpers

Included in:
ViewHelpers
Defined in:
lib/active_scaffold/helpers/form_column_helpers.rb

Overview

Helpers that assist with the rendering of a Form Column

Instance Method Summary collapse

Instance Method Details

#action_for_validation(record) ⇒ Object 



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# File 'lib/active_scaffold/helpers/form_column_helpers.rb', line 100

def action_for_validation(record)
  record&.persisted? ? :update : :create
end

#active_scaffold_add_existing_input(options) ⇒ Object 



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# File 'lib/active_scaffold/helpers/form_column_helpers.rb', line 422

def active_scaffold_add_existing_input(options)
  record = options.delete(:object)
  if controller.respond_to?(:record_select_config, true)
    remote_controller = active_scaffold_controller_for(record_select_config.model).controller_path
    options[:controller] = remote_controller
    options.merge!(active_scaffold_input_text_options)
    record_select_field(options[:name], nil, options)
  else
    helper_method = association_helper_method(nested.association, :sorted_association_options_find)
    select_options = send(helper_method, nested.association, nil, record)
    select_options ||= active_scaffold_config.model.all
    select_options = options_from_collection_for_select(select_options, :id, :to_label)
    select_tag 'associated_id', (content_tag(:option, as_(:_select_), value: '') + select_options) unless select_options.empty?
  end
end

#active_scaffold_add_existing_label ⇒ Object 



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# File 'lib/active_scaffold/helpers/form_column_helpers.rb', line 438

def active_scaffold_add_existing_label
  if controller.respond_to?(:record_select_config, true)
    record_select_config.model.model_name.human
  else
    active_scaffold_config.model.model_name.human
  end
end

#active_scaffold_column_expect_array?(column) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/active_scaffold/helpers/form_column_helpers.rb', line 313

def active_scaffold_column_expect_array?(column)
  ui_options = column.form_ui_options || column.options
  case column.form_ui
  when :select
    column.association&.collection? || ui_options[:multiple]
  when :select_multiple, :checkboxes, :draggable
    true
  end
end

#active_scaffold_input_for(column, scope = nil, options = nil, form_columns: nil) ⇒ Object

This method decides which input to use for the given column. It does not do any rendering. It only decides which method is responsible for rendering.



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# File 'lib/active_scaffold/helpers/form_column_helpers.rb', line 9

def active_scaffold_input_for(column, scope = nil, options = nil, form_columns: nil)
  options ||= active_scaffold_input_options(column, scope)
  options = update_columns_options(column, scope, options, form_columns: form_columns)
  active_scaffold_render_input(column, options)
end

#active_scaffold_input_options(column, scope = nil, options = {}) ⇒ Object

the standard active scaffold options used for class, name and scope



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# File 'lib/active_scaffold/helpers/form_column_helpers.rb', line 105

def active_scaffold_input_options(column, scope = nil, options = {})
  name = scope ? "record#{scope}[#{column.name}]" : "record[#{column.name}]"
  record = options[:object]

  # Add some HTML5 attributes for in-browser validation and better user experience
  if column.required?(action_for_validation(record)) && (!@disable_required_for_new || scope.nil? || record&.persisted?)
    options[:required] = true
  end
  options[:placeholder] = column.placeholder if column.placeholder.present?

  # Fix for keeping unique IDs in subform
  id_control = "record_#{column.name}_#{[params[:eid], params[:parent_id] || params[:id]].compact.join '_'}"
  id_control += scope_id(scope) if scope

  classes = "#{column.name}-input"
  classes += ' numeric-input' if column.number?

  collapsible_id = "container_#{id_control}" if (column.form_ui_options || column.options)[:collapsible]

  {name: name, class: classes, id: id_control, collapsible_id: collapsible_id}.merge(options)
end

#active_scaffold_input_text_options(options = {}) ⇒ Object

the standard active scaffold options used for textual inputs



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# File 'lib/active_scaffold/helpers/form_column_helpers.rb', line 94

def active_scaffold_input_text_options(options = {})
  options[:autocomplete] ||= 'off'
  options[:class] = "#{options[:class]} text-input".strip
  options
end

#active_scaffold_render_input(column, options) ⇒ Object 



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# File 'lib/active_scaffold/helpers/form_column_helpers.rb', line 15

def active_scaffold_render_input(column, options)
  record = options[:object]

  # first, check if the dev has created an override for this specific field
  if (method = override_form_field(column))
    send(method, record, options)

  # second, check if the dev has specified a valid form_ui for this column
  elsif column.form_ui && (method = override_input(column.form_ui))
    send(method, column, options, ui_options: (column.form_ui_options || column.options).except(:collapsible))

  elsif column.association
    # if we get here, it's because the column has a form_ui but not one ActiveScaffold knows about.
    raise ArgumentError, "Unknown form_ui `#{column.form_ui}' for column `#{column.name}'" if column.form_ui

    # its an association and nothing is specified, we will assume form_ui :select
    active_scaffold_input_select(column, options)

  elsif column.virtual?
    options[:value] = format_number_value(record.send(column.name), column.options) if column.number?
    active_scaffold_input_virtual(column, options)

  elsif (method = override_input(column.column_type)) # regular model attribute column
    # if we (or someone else) have created a custom render option for the column type, use that
    send(method, column, options)

  else # final ultimate fallback: use rails' generic input method
    # for textual fields we pass different options
    options = active_scaffold_input_text_options(options) if column.text? || column.number?
    if column.column_type == :string && options[:maxlength].blank?
      options[:maxlength] = column.type_for_attribute.limit
      options[:size] ||= options[:maxlength].to_i > 30 ? 30 : options[:maxlength]
    end
    options[:value] = format_number_value(record.send(column.name), column.options) if column.number?
    text_field(:record, column.name, options.merge(column.options).except(:format))
  end
rescue StandardError => e
  handle_exception_on_column(e, column, record)
end

#active_scaffold_render_subform_column(column, scope, crud_type, readonly, add_class = false, record = nil, form_columns: nil) ⇒ Object

rubocop:disable Metrics/ParameterLists



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# File 'lib/active_scaffold/helpers/form_column_helpers.rb', line 55

def active_scaffold_render_subform_column(column, scope, crud_type, readonly, add_class = false, record = nil, form_columns: nil) # rubocop:disable Metrics/ParameterLists
  if add_class
    col_class = []
    col_class << 'required' if column.required?(action_for_validation(record))
    col_class << column.css_class unless column.css_class.nil? || column.css_class.is_a?(Proc)
    col_class << 'hidden' if column_renders_as(column) == :hidden
    col_class << 'checkbox' if column.form_ui == :checkbox
    col_class = col_class.join(' ')
  end
  if (readonly && !record.new_record?) || !record.authorized_for?(crud_type: crud_type, column: column.name)
    form_attribute(column, record, scope, true, col_class)
  else
    renders_as = column_renders_as(column)
    html = render_column(column, record, renders_as, scope, only_value: false, col_class: col_class, form_columns: form_columns)
    html = content_tag(:div, html, active_scaffold_subform_attributes(column)) if renders_as == :subform
    html
  end
end

#active_scaffold_subform_attributes(column, column_css_class = nil, klass = nil, tab_id: nil, ui_options: column.options) ⇒ Object 



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# File 'lib/active_scaffold/helpers/form_column_helpers.rb', line 74

def active_scaffold_subform_attributes(column, column_css_class = nil, klass = nil, tab_id: nil, ui_options: column.options)
  {
    class: "sub-form #{ui_options[:layout] || active_scaffold_config_for(klass || column.association.klass).subform.layout}-sub-form #{column_css_class} #{column.name}-sub-form",
    id: sub_form_id(association: column.name, tab_id: tab_id)
  }
end

#active_scaffold_subform_record_actions(association_column, record, locked, scope) ⇒ Object 



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# File 'lib/active_scaffold/helpers/form_column_helpers.rb', line 81

def active_scaffold_subform_record_actions(association_column, record, locked, scope)
  return unless association_column.association.collection? && !locked

  auth = %i[destroy delete_all delete].exclude?(association_column.association.dependent)
  auth, reason = record.authorized_for?(crud_type: :delete, reason: true) unless auth
  if auth
    link_to(as_(:remove), '#', class: 'destroy')
  else
    content_tag :span, reason, class: 'destroy reason'
  end
end

#column_description(column, record, scope = nil) ⇒ Object 



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# File 'lib/active_scaffold/helpers/form_column_helpers.rb', line 239

def column_description(column, record, scope = nil)
  desc = column.description(record, scope)
  content_tag(:span, h(desc) + content_tag(:span, nil, class: 'close'), class: 'description') if desc.present?
end

#column_numerical_constraints(column, options) ⇒ Object

Try to get numerical constraints from model's validators



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# File 'lib/active_scaffold/helpers/form_column_helpers.rb', line 447

def column_numerical_constraints(column, options)
  validators = column.active_record_class.validators.select do |v|
    v.is_a?(ActiveModel::Validations::NumericalityValidator) &&
      v.attributes.include?(column.name) &&
      !v.options[:if] && !v.options[:unless]
  end

  equal_validator = validators.find { |v| v.options[:equal_to] }
  # If there is equal_to constraint - use it (unless otherwise specified by user)
  if equal_validator && !(options[:min] || options[:max])
    equal_to = equal_validator.options[:equal_to]
    return {min: equal_to, max: equal_to}
  end

  numerical_constraints = {}

  # find minimum and maximum from validators
  # we can safely modify :min and :max by 1 for :greater_tnan or :less_than value only for integer values
  only_integer = column.column_type == :integer if column.column
  only_integer ||= validators.find { |v| v.options[:only_integer] }.present?
  margin = only_integer ? 1 : 0

  # Minimum
  unless options[:min]
    min = validators.filter_map { |v| v.options[:greater_than_or_equal_to] }.max
    greater_than = validators.filter_map { |v| v.options[:greater_than] }.max
    numerical_constraints[:min] = [min, (greater_than + margin if greater_than)].compact.max
  end

  # Maximum
  unless options[:max]
    max = validators.filter_map { |v| v.options[:less_than_or_equal_to] }.min
    less_than = validators.filter_map { |v| v.options[:less_than] }.min
    numerical_constraints[:max] = [max, (less_than - margin if less_than)].compact.min
  end

  # Set step = 2 for column values restricted to be odd or even (but only if minimum is set)
  unless options[:step]
    only_odd_valid  = validators.any? { |v| v.options[:odd] }
    only_even_valid = validators.any? { |v| v.options[:even] } unless only_odd_valid
    if !only_integer
      numerical_constraints[:step] ||= "0.#{'0' * (column.column.scale - 1)}1" if column.column&.scale.to_i.positive?
    elsif options[:min].respond_to?(:even?) && (only_odd_valid || only_even_valid)
      numerical_constraints[:step] = 2
      numerical_constraints[:min] += 1 if only_odd_valid  && options[:min].even?
      numerical_constraints[:min] += 1 if only_even_valid && options[:min].odd?
    end
    numerical_constraints[:step] ||= 'any' unless only_integer
  end

  numerical_constraints
end

#column_renders_as(column) ⇒ Object

Macro-level rendering decisions for columns



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# File 'lib/active_scaffold/helpers/form_column_helpers.rb', line 402

def column_renders_as(column)
  if column.respond_to? :each
    :subsection
  elsif column.active_record_class.locking_column.to_s == column.name.to_s || column.form_ui == :hidden
    :hidden
  elsif column.association.nil? || column.form_ui || active_scaffold_config_for(column.association.klass).actions.exclude?(:subform) || override_form_field?(column)
    :field
  else
    :subform
  end
end

#column_scope(column, scope = nil, record = nil, generated_id = nil) ⇒ Object 



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# File 'lib/active_scaffold/helpers/form_column_helpers.rb', line 414

def column_scope(column, scope = nil, record = nil, generated_id = nil)
  if column.association&.collection?
    "#{scope}[#{column.name}][#{record.id || generate_temporary_id(record, generated_id)}]"
  else
    "#{scope}[#{column.name}]"
  end
end

#column_show_add_existing(column, record = nil) ⇒ Object 



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# File 'lib/active_scaffold/helpers/form_column_helpers.rb', line 344

def column_show_add_existing(column, record = nil)
  column.allow_add_existing && options_for_association_count(column.association, record).positive?
end

#column_show_add_new(column, associated, record) ⇒ Object 



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# File 'lib/active_scaffold/helpers/form_column_helpers.rb', line 348

def column_show_add_new(column, associated, record)
  assoc = column.association
  value = assoc.singular?
  value ||= assoc.collection? && !assoc.readonly? && (!assoc.through? || !assoc.through_reflection.collection?)
  value &&= false unless assoc.klass.authorized_for?(crud_type: :create)
  value
end

#current_form_columns(record, scope, subform_controller = nil) ⇒ Object 



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# File 'lib/active_scaffold/helpers/form_column_helpers.rb', line 127

def current_form_columns(record, scope, subform_controller = nil)
  if @main_columns && (scope.nil? || subform_controller == controller.class)
    @main_columns.visible_columns_names
  elsif scope
    subform_controller.active_scaffold_config.subform.columns.visible_columns_names
  elsif %i[new create edit update render_field].include? action_name.to_sym
    # disable update_columns for inplace_edit (GET render_field)
    return if action_name == 'render_field' && request.get?

    active_scaffold_config.send(record.new_record? ? :create : :update).columns.visible_columns_names
  end
end

#field_attributes(column, record) ⇒ Object 



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# File 'lib/active_scaffold/helpers/form_column_helpers.rb', line 173

def field_attributes(column, record)
  {}
end

#form_attribute(column, record, scope = nil, only_value = false, col_class = nil, form_columns: nil) ⇒ Object 



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# File 'lib/active_scaffold/helpers/form_column_helpers.rb', line 244

def form_attribute(column, record, scope = nil, only_value = false, col_class = nil, form_columns: nil)
  column_options = active_scaffold_input_options(column, scope, object: record)
  collapsible_id = column_options.delete :collapsible_id
  attributes = field_attributes(column, record)
  attributes[:class] = "#{attributes[:class]} #{col_class}" if col_class.present?
  if only_value
    field = content_tag(:span, show_column_value(record, column), column_options.except(:name, :object))
    if column.association.nil? || column.association.belongs_to?
      # hidden field probably not needed, but leaving it just in case
      # but it isn't working for assocations which are not belongs_to
      method = column.association ? column.association.foreign_key : column.name
      field << hidden_field(:record, method, column_options)
    end
  else
    field = active_scaffold_input_for column, scope, column_options, form_columns: form_columns
  end
  if field
    field << loading_indicator_tag(action: :render_field, id: params[:id]) if column.update_columns
    desc = column_description(column, record, scope)
    field << desc if desc.present?
  end

  label = label_tag(label_for(column, column_options), form_column_label(column, record, scope))
  label << h(' ') << link_to_visibility_toggle(collapsible_id) if collapsible_id
  content_tag :dl, attributes do
    content_tag(:dt, label) << content_tag(:dd, field, id: collapsible_id)
  end
end

#form_column_is_hidden?(column, record, scope = nil) ⇒ Boolean

rubocop:disable Naming/PredicateMethod

Returns:

  • (Boolean) 


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# File 'lib/active_scaffold/helpers/form_column_helpers.rb', line 220

def form_column_is_hidden?(column, record, scope = nil) # rubocop:disable Naming/PredicateMethod
  if column.clear_form_column_if.nil?
    condition_to_hide = column.hide_form_column_if
    clear = false
  else
    condition_to_hide = column.clear_form_column_if
    clear = true
  end
  hide =
    if condition_to_hide.respond_to?(:call)
      condition_to_hide.call(record, column, scope)
    elsif condition_to_hide.is_a?(Symbol)
      record.send(condition_to_hide)
    else
      condition_to_hide
    end
  [hide, clear]
end

#form_column_label(column, record = nil, scope = nil) ⇒ Object 



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# File 'lib/active_scaffold/helpers/form_column_helpers.rb', line 277

def form_column_label(column, record = nil, scope = nil)
  column.label(record, scope)
end

#form_hidden_attribute(column, record, scope = nil, clear = false) ⇒ Object 



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# File 'lib/active_scaffold/helpers/form_column_helpers.rb', line 285

def form_hidden_attribute(column, record, scope = nil, clear = false)
  content_tag :dl, style: 'display: none' do
    content_tag(:dt, '') <<
      content_tag(:dd, form_hidden_field(column, record, scope, clear))
  end
end

#form_hidden_field(column, record, scope, clear = false) ⇒ Object 



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# File 'lib/active_scaffold/helpers/form_column_helpers.rb', line 292

def form_hidden_field(column, record, scope, clear = false)
  options = active_scaffold_input_options(column, scope)
  value = record.send(column.name) unless clear
  if column.association&.collection?
    options[:name] += '[]'
    if value.blank?
      hidden_field_tag options[:name], '', options
    else
      fields = value.map do |r|
        hidden_field_tag options[:name], r.id, options.merge(id: options[:id] + "_#{r.id}")
      end
      safe_join fields, ''
    end
  elsif column.association
    hidden_field_tag options[:name], value&.id, options
  else
    options[:name] += '[]' if active_scaffold_column_expect_array?(column)
    hidden_field_tag options[:name], value, options
  end
end

#in_subform?(column, parent_record, parent_column) ⇒ Boolean

Should this column be displayed in the subform?

Returns:

  • (Boolean) 


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# File 'lib/active_scaffold/helpers/form_column_helpers.rb', line 324

def in_subform?(column, parent_record, parent_column)
  return true unless column.association

  if column.association.reverse.nil?
    # Polymorphic associations can't appear because they *might* be the reverse association
    return false if column.association.polymorphic?

    # A column shouldn't be in the subform if it's the reverse association to the parent
    !column.association.inverse_for?(parent_record.class)
  elsif column.association.reverse == parent_column.name
    if column.association.polymorphic?
      column.association.name != parent_column.association.as
    else
      !column.association.inverse_for?(parent_record.class)
    end
  else
    true
  end
end

#label_for(column, options) ⇒ Object 



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# File 'lib/active_scaffold/helpers/form_column_helpers.rb', line 273

def label_for(column, options)
  options[:id] unless column.form_ui == :select && column.association&.collection?
end

#numerical_constraints_for_column(column, options) ⇒ Object 



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# File 'lib/active_scaffold/helpers/form_column_helpers.rb', line 500

def numerical_constraints_for_column(column, options)
  constraints = Rails.cache.fetch("#{column.cache_key}#numerical_constraints") do
    column_numerical_constraints(column, options)
  end
  constraints.merge(options)
end

#override_form_field(column) ⇒ Object Also known as: override_form_field? 



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# File 'lib/active_scaffold/helpers/form_column_helpers.rb', line 381

def override_form_field(column)
  override_helper column, 'form_column'
end

#override_form_field_partial(column) ⇒ Object

the naming convention for overriding form fields with helpers



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# File 'lib/active_scaffold/helpers/form_column_helpers.rb', line 377

def override_form_field_partial(column)
  partial_for_model(column.active_record_class, "#{clean_column_name(column.name)}_form_column")
end

#override_input(form_ui) ⇒ Object Also known as: override_input?

the naming convention for overriding form input types with helpers



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# File 'lib/active_scaffold/helpers/form_column_helpers.rb', line 387

def override_input(form_ui)
  method = "active_scaffold_input_#{form_ui}"
  method if respond_to? method
end

#override_subform_partial(column, subform_partial) ⇒ Object

add functionality for overriding subform partials from association class path



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# File 'lib/active_scaffold/helpers/form_column_helpers.rb', line 372

def override_subform_partial(column, subform_partial)
  partial_for_model(column.association.klass, subform_partial) if column_renders_as(column) == :subform
end

#partial_for_model(model, partial) ⇒ Object

Form column override signatures



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# File 'lib/active_scaffold/helpers/form_column_helpers.rb', line 360

def partial_for_model(model, partial)
  controller = active_scaffold_controller_for(model)
  while controller.uses_active_scaffold?
    path = File.join(controller.controller_path, partial)
    return path if template_exists?(path, true)

    controller = controller.superclass
  end
  nil
end

#render_column(column, record, renders_as, scope = nil, only_value: false, col_class: nil, form_columns: nil, **subform_locals) ⇒ Object 



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# File 'lib/active_scaffold/helpers/form_column_helpers.rb', line 196

def render_column(column, record, renders_as, scope = nil, only_value: false, col_class: nil, form_columns: nil, **subform_locals)
  hide_column, clear = form_column_is_hidden?(column, record, scope)
  if hide_column
    if clear
      form_hidden_attribute(column, record, scope, true)
    else
      # creates an element that can be replaced by the update_columns routine,
      # but will not affect the value of the submitted form in this state:
      # <dl><input type="hidden" class="<%= column.name %>-input"></dl>
      content_tag :dl, style: 'display: none' do
        hidden_field_tag(nil, nil, class: "#{column.name}-input")
      end
    end
  elsif (partial = override_form_field_partial(column))
    render partial, column: column, only_value: only_value, scope: scope, col_class: col_class, record: record, form_columns: form_columns
  elsif renders_as == :field || override_form_field?(column)
    form_attribute(column, record, scope, only_value, col_class, form_columns: form_columns)
  elsif renders_as == :subform
    render 'form_association', subform_locals.slice(:tabbed_by, :tab_value, :tab_id).merge(column: column, scope: scope, parent_record: record)
  else
    form_hidden_attribute(column, record, scope)
  end
end

#render_subsection(column, record, scope, form_action, partial: 'form') ⇒ Object 



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# File 'lib/active_scaffold/helpers/form_column_helpers.rb', line 177

def render_subsection(column, record, scope, form_action, partial: 'form')
  subsection_id = sub_section_id(sub_section: column.label)
  locals = {columns: column, form_action: form_action, scope: scope}
  header = content_tag(:h5) do
    h(column.label) <<
      link_to_visibility_toggle(subsection_id, default_visible: !column.collapsed)
  end
  if column.tabbed_by
    locals[:tabbed_by] = column.tabbed_by
    header << content_tag(:div, id: subsection_id) do
      active_scaffold_tabbed_by(column, record, scope, subsection_id) do |tab_value, tab_id|
        render partial, locals.merge(subsection_id: "#{subsection_id}-#{tab_id}", tab_id: tab_id, tab_value: tab_value)
      end
    end
  else
    header << render(partial, locals.merge(subsection_id: subsection_id))
  end
end

#subform_label(column, hidden) ⇒ Object 



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# File 'lib/active_scaffold/helpers/form_column_helpers.rb', line 281

def subform_label(column, hidden)
  column.label unless hidden
end

#subform_partial_for_column(column, klass = nil, ui_options: column.options) ⇒ Object 



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# File 'lib/active_scaffold/helpers/form_column_helpers.rb', line 393

def subform_partial_for_column(column, klass = nil, ui_options: column.options)
  subform_partial = "#{ui_options[:layout] || active_scaffold_config_for(klass || column.association.klass).subform.layout}_subform"
  override_subform_partial(column, subform_partial) || subform_partial
end

#update_columns_options(column, scope, options, force = false, form_columns: nil, url_params: {}) ⇒ Object 



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# File 'lib/active_scaffold/helpers/form_column_helpers.rb', line 155

def update_columns_options(column, scope, options, force = false, form_columns: nil, url_params: {})
  record = options[:object]
  subform_controller = controller.class.active_scaffold_controller_for(record.class) if scope
  form_columns ||= current_form_columns(record, scope, subform_controller)
  update_columns = column.update_columns&.flat_map { |col| col.is_a?(Hash) ? col.keys : col }
  force = true if update_columns&.include?(:__root__)

  if force || (form_columns && update_columns&.intersect?(form_columns))
    url_params = url_options_for_render_field(column, record, scope, subform_controller, url_params)
    options[:class] = "#{options[:class]} update_form".strip
    options['data-update_url'] = url_for(url_params)
    options['data-update_send_form'] = column.update_columns&.any?(Hash) || column.send_form_on_update_column
    options['data-update_send_form_selector'] = column.options[:send_form_selector] if column.options[:send_form_selector]
    options['data-skip-disable-form'] = !column.disable_on_update_column
  end
  options
end

#url_options_for_render_field(column, record, scope, subform_controller, url_params) ⇒ Object 



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# File 'lib/active_scaffold/helpers/form_column_helpers.rb', line 140

def url_options_for_render_field(column, record, scope, subform_controller, url_params)
  url_params.reverse_merge! params_for(action: 'render_field', column: column.name, id: record.to_param)
  if nested? && scope
    url_params[:nested] = url_params.slice(:parent_scaffold, :association, nested.param_name)
    url_params = url_params.except(:parent_scaffold, :association, nested.param_name)
  end
  if scope
    url_params[:parent_controller] ||= url_params[:controller].gsub(%r{^/}, '')
    url_params[:controller] = subform_controller.controller_path
    url_params[:scope] = scope
    url_params[:parent_id] = params[:parent_id] || params[:id]
  end
  url_params
end