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Contents
module Adminpanel
module SortableGallery
extend ActiveSupport::Concern
included do
before_create :set_position
before_destroy :rearrange_positions
scope :ordered, -> { order('position ASC') }
end
module ClassMethods
def is_sortable?
true
end
def in_better_position(current_position, new_position, record_id)
where(
'position >= ? AND position < ?',
new_position,
current_position
).where(
model_id: record_id,
type: self.to_s
)
end
def in_worst_position(current_position, new_position, record_id)
where(
'position > ? AND position <= ?',
current_position,
new_position
).where(
model_id: record_id,
type: self.to_s
)
end
end
def move_to_position(new_position)
if new_position < position
# search for better elements and downgrade them
self.class.in_better_position(
self.position,
new_position,
self.model_id
).update_all('position = position + 1')
else
# search for worster elements and upgrade them
self.class.in_worst_position(
self.position,
new_position,
self.model_id
).update_all('position = position - 1')
end
self.update(position: new_position)
end
# we should detect if the name isn't defined in the class
def name
I18n.t('gallery.image')
end
protected
def rearrange_positions
self.class.where(
'position > ?',
self.position
).where(
model_id: self.model_id,
model_type: self.model_type
).update_all('position = position - 1')
end
def set_position
last_record = self.class.ordered.last
if last_record.nil?
self.position = 1
else
self.position = last_record.position + 1
end
end
end
end
Version data entries
19 entries across 19 versions & 1 rubygems