Module: NestedForm::BuilderMixin

Included in:
Builder
Defined in:
lib/nested_form/builder_mixin.rb

Instance Method Summary collapse

Instance Method Details

#fields_for_nested_model(name, object, options, block) ⇒ Object 



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# File 'lib/nested_form/builder_mixin.rb', line 90

def fields_for_nested_model(name, object, options, block)
  classes = 'fields'
  classes << ' marked_for_destruction' if object.respond_to?(:marked_for_destruction?) && object.marked_for_destruction?

  perform_wrap   = options.fetch(:nested_wrapper, true)
  perform_wrap &&= options[:wrapper] != false # wrap even if nil

  if perform_wrap
    @template.content_tag(:div, super, :class => classes)
  else
    super
  end
end

#fields_for_with_nested_attributes(association_name, *args) ⇒ Object 



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# File 'lib/nested_form/builder_mixin.rb', line 74

def fields_for_with_nested_attributes(association_name, *args)
  # TODO Test this better
  block = args.pop || Proc.new { |fields| @template.render(:partial => "#{association_name.to_s.singularize}_fields", :locals => {:f => fields}) }

  options = args.dup.extract_options!

  # Rails 3.0.x
  if options.empty? && args[0].kind_of?(Array)
    options = args[0].dup.extract_options!
  end

  @fields ||= {}
  @fields[fields_blueprint_id_for(association_name)] = { :block => block, :options => options }
  super(association_name, *(args << block))
end

#link_to_add(*args, &block) ⇒ Object

Adds a link to insert a new associated records. The first argument is the name of the link, the second is the name of the association.

f.link_to_add("Add Task", :tasks)

You can pass HTML options in a hash at the end and a block for the content.

<%= f.link_to_add(:tasks, :class => "add_task", :href => new_task_path) do %>
  Add Task
<% end %>

You can also pass model_object option with an object for use in the blueprint, e.g.:

<%= f.link_to_add(:tasks, :model_object => Task.new(:name => 'Task')) %>

See the README for more details on where to call this method.



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# File 'lib/nested_form/builder_mixin.rb', line 19

def link_to_add(*args, &block)
  options = args.extract_options!.symbolize_keys
  association = args.pop

  unless object.respond_to?("#{association}_attributes=")
    raise ArgumentError, "Invalid association. Make sure that accepts_nested_attributes_for is used for #{association.inspect} association."
  end

  model_object = options.delete(:model_object) do
    reflection = object.class.reflect_on_association(association)
    reflection.klass.new
  end

  options[:class] = [options[:class], "add_nested_fields"].compact.join(" ")
  options["data-association"] = association
  options["data-blueprint-id"] = fields_blueprint_id = fields_blueprint_id_for(association)
  args << (options.delete(:href) || "javascript:void(0)")
  args << options

  @fields ||= {}
  @template.after_nested_form(fields_blueprint_id) do
    blueprint = {:id => fields_blueprint_id, :style => 'display: none'}
    block, options = @fields[fields_blueprint_id].values_at(:block, :options)
    options[:child_index] = "new_#{association}"
    blueprint[:"data-blueprint"] = fields_for(association, model_object, options, &block).to_str
    @template.content_tag(:div, nil, blueprint)
  end
  @template.link_to(*args, &block)
end

#link_to_remove(*args, &block) ⇒ Object

Adds a link to remove the associated record. The first argment is the name of the link.

f.link_to_remove("Remove Task")

You can pass HTML options in a hash at the end and a block for the content.

<%= f.link_to_remove(:class => "remove_task", :href => "#") do %>
  Remove Task
<% end %>

See the README for more details on where to call this method.



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# File 'lib/nested_form/builder_mixin.rb', line 60

def link_to_remove(*args, &block)
  options = args.extract_options!.symbolize_keys
  options[:class] = [options[:class], "remove_nested_fields"].compact.join(" ")

  # Extracting "milestones" from "...[milestones_attributes][...]"
  md = object_name.to_s.match /(\w+)_attributes\]\[[\w\d]+\]$/
  association = md && md[1]
  options["data-association"] = association

  args << (options.delete(:href) || "javascript:void(0)")
  args << options
  hidden_field(:_destroy) << @template.link_to(*args, &block)
end