3

Since administrate does not yet have support for multiple selects. Has anyone created a custom multiple select? Preferably one that works like the HasMany select.

dan-klasson
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1 Answers1

6

Here it is in case someone else needs it:

app/fields/multiple_select_field.rb

# app/fields/multiple_select_field.rb

require "administrate/field/base"

class MultipleSelectField < Administrate::Field::Select

  def to_s
    data
  end

  def self.permitted_attribute(attribute)
    { attribute.to_sym => [] }
  end

  def permitted_attribute
    self.class.permitted_attribute(attribute)
  end

end

app/views/fields/multiple_select_field/_form.html.erb

# app/views/fields/multiple_select_field/_form.html.erb

<div class="field-unit__label">
  <%= f.label field.attribute %>
</div>
<div class="field-unit__field">
  <%= f.select(
    field.attribute,
    options_from_collection_for_select(
      field.selectable_options,
      :to_s,
      :to_s,
      field.data.presence,
    ),
    {}, multiple: true,
  ) %>
</div>

app/views/fields/multiple_select_field/_index.html.erb

# app/views/fields/multiple_select_field/_index.html.erb
<%= field.to_param.join(', ') %>

app/views/fields/multiple_select_field/_show.html.erb

# app/views/fields/multiple_select_field/_show.html.erb
<%= field.to_param.join(', ') %>
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dan-klasson
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  • Good stuff! How exactly do I incorporate this in attribute_dashboard.rb? – Esseme May 15 '19 at 10:23
  • @Esseme Haven't worked with this in years but assuming you just have to use it in your view like you would with any other administrate field. – dan-klasson May 15 '19 at 11:52
  • hi @dan-klasson, I am trying to implement bulk delete by providing checkbox to select records and delete multiple at once, can you please point me in the right direction as to how i can achieve this, thanks. – opensource-developer Oct 17 '19 at 12:40
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    with probably the latest version of administrate gem, you would need to update `def self.permitted_attribute(attribute)` to `def self.permitted_attribute(attribute, _options = nil)` – opensource-developer May 09 '22 at 11:41