universal_table/app/models/table_entry.rb

class TableEntry
	include Mongoid::Document
	include Mongoid::Timestamps
	include Slug

  	attr_accessor :sort_value
  	field :sort_number, type: Integer, default: 0

	has_many :column_entries, :dependent => :destroy
	belongs_to :u_table

	accepts_nested_attributes_for :column_entries, :allow_destroy => true

	def self.u_table
		UTable.find(criteria.selector['u_table_id'])
	end

	def self.sorting(params: nil,table: nil,field: nil,direction: nil)
		if table.nil?
			table = u_table
		end
		if field.nil? || direction.nil?
			if !params[:sortcolumn].blank?
				field = params[:sortcolumn]
				direction = params[:sort]
			else
				field = params[:sort].blank? ? nil : params[:sort]
				direction = params[:order].blank? ? 'desc' : params[:order]
			end
			if field.nil?
				field = table.default_ordered_field
				if field != 'created_at'
					columns = table.table_columns
					sort_column = columns.where(:key=>field).first || columns.where(:title=>field).first
					direction = sort_column.order_direction
				end
			end
		end
		
		field = field.to_s
		if field=='created_at' || field == 'sort_number'
			self.order_by({field => direction})
		else
			values = criteria.to_a
			field_id = table.table_columns.where(key: field).first || table.table_columns.where(title: field).first
			values.each do |v|
				v.sort_value = v.column_entries.where(:table_column_id=>field_id).first.sort_value
			end
			values = values.sort_by{|v| v.sort_value}
			if direction=='desc'
				values = values.reverse
			end
			Kaminari.paginate_array(values)
		end
	end
end