Class: Effective::ActiveRecordDatatableTool

Inherits:
Object
  • Object
show all
Defined in:
app/models/effective/active_record_datatable_tool.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(datatable, table_columns) ⇒ ActiveRecordDatatableTool

Returns a new instance of ActiveRecordDatatableTool.



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# File 'app/models/effective/active_record_datatable_tool.rb', line 7

def initialize(datatable, table_columns)
  @datatable = datatable
  @table_columns = table_columns
end

Instance Attribute Details

#table_columns ⇒ Object

Returns the value of attribute table_columns.



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# File 'app/models/effective/active_record_datatable_tool.rb', line 3

def table_columns
  @table_columns
end

Instance Method Details

#order(collection) ⇒ Object 



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# File 'app/models/effective/active_record_datatable_tool.rb', line 20

def order(collection)
  return collection if order_column.blank?

  column = order_column[:column]
  before = ''; after = ''

  if postgres?
    after = if order_column[:nulls] == :first
      ' NULLS FIRST'
    elsif order_column[:nulls] == :last
      ' NULLS LAST'
    else
      " NULLS #{order_direction == 'DESC' ? 'FIRST' : 'LAST' }"
    end
  elsif mysql?
    before = "ISNULL(#{column}), "
  end

  if order_column[:type] == :belongs_to_polymorphic
    collection.order("#{before}#{column.sub('_id', '_type')} #{order_direction}, #{column} #{order_direction}#{after}")
  elsif order_column[:sql_as_column] == true
    collection.order("#{column} #{order_direction}")
  else
    collection.order("#{before}#{column} #{order_direction}#{after}")
  end
end

#order_column ⇒ Object 



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# File 'app/models/effective/active_record_datatable_tool.rb', line 16

def order_column
  @order_column ||= table_columns[order_name]
end

#paginate(collection) ⇒ Object 



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# File 'app/models/effective/active_record_datatable_tool.rb', line 199

def paginate(collection)
  collection.page(page).per(per_page)
end

#search(collection) ⇒ Object 



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# File 'app/models/effective/active_record_datatable_tool.rb', line 47

def search(collection)
  search_terms.each do |name, search_term|
    column_search = search_column(collection, table_columns[name], search_term)
    raise 'search_column must return an ActiveRecord::Relation object' unless column_search.kind_of?(ActiveRecord::Relation)
    collection = column_search
  end
  collection
end

#search_column_with_defaults(collection, table_column, term) ⇒ Object 



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# File 'app/models/effective/active_record_datatable_tool.rb', line 56

def search_column_with_defaults(collection, table_column, term)
  column = table_column[:column]
  sql_op = table_column[:filter][:sql_operation] || :where # only other option is :having

  case table_column[:type]
  when :string, :text
    if (table_column[:filter][:type] == :select && table_column[:filter][:fuzzy] != true) || sql_op != :where
      if ['null', 'nil', nil].include?(term)
        collection.public_send(sql_op, "#{column} = :term OR #{column} IS NULL", term: term)
      else
        collection.public_send(sql_op, "#{column} = :term", term: term)
      end
    else
      collection.public_send(sql_op, "#{column} #{ilike} :term", term: "%#{term}%")
    end
  when :belongs_to_polymorphic
    # our key will be something like Post_15, or Event_1
    (type, id) = term.split('_')

    if type.present? && id.present?
      collection.public_send(sql_op, "#{column} = :id AND #{column.sub('_id', '_type')} = :type", id: id, type: type)
    else
      collection
    end
  when :has_many
    reflection = collection.klass.reflect_on_association(table_column[:name].to_sym)
    raise "unable to find #{collection.klass.name} :has_many :#{table_column[:name]} association" unless reflection

    obj = reflection.build_association({})
    klass = obj.class

    inverse = reflection.inverse_of || klass.reflect_on_association(collection.table_name) || obj.class.reflect_on_association(collection.table_name.singularize)
    raise "unable to find #{klass.name} has_many :#{collection.table_name} or belongs_to :#{collection.table_name.singularize} associations" unless inverse

    ids = if [:select, :grouped_select].include?(table_column[:filter][:type])
      # Treat the search term as one or more IDs
      inverse_ids = term.split(',').map { |term| (term = term.to_i) == 0 ? nil : term }.compact
      return collection unless inverse_ids.present?

      klass.where(id: inverse_ids).joins(inverse.name).pluck(inverse.foreign_key)
    else
      # Treat the search term as a string.
      klass_columns = if (table_column[:column] == klass.table_name) # No custom column has been defined
        klass.columns.map { |col| col.name if col.text? }.compact  # Search all database text? columns
      else
        [table_column[:column].gsub("#{klass.table_name}.", '')] # table_column :order_items, column: 'order_items.title'
      end

      conditions = klass_columns.map { |col_name| "#{klass.table_name}.#{col_name} #{ilike} :term" }

      klass.where(conditions.join(' OR '), term: "%#{term}%", num: term.to_i).joins(inverse.name).pluck(inverse.foreign_key)
    end

    collection.public_send(sql_op, id: ids)

  when :has_and_belongs_to_many
    reflection = collection.klass.reflect_on_association(table_column[:name].to_sym)
    raise "unable to find #{collection.klass.name} :has_and_belongs_to_many :#{table_column[:name]} association" unless reflection

    obj = reflection.build_association({})
    klass = obj.class

    inverse = reflection.inverse_of || klass.reflect_on_association(collection.table_name) || obj.class.reflect_on_association(collection.table_name.singularize)
    raise "unable to find #{klass.name} has_and_belongs_to_many :#{collection.table_name} or belongs_to :#{collection.table_name.singularize} associations" unless inverse

    ids = if [:select, :grouped_select].include?(table_column[:filter][:type])
      # Treat the search term as one or more IDs
      inverse_ids = term.split(',').map { |term| (term = term.to_i) == 0 ? nil : term }.compact
      return collection unless inverse_ids.present?

      klass.where(id: inverse_ids).flat_map { |klass| (klass.send(inverse.name).pluck(:id) rescue []) }
    else
      # Treat the search term as a string.

      klass_columns = if (table_column[:column] == klass.table_name) # No custom column has been defined
        klass.columns.map { |col| col.name if col.text? }.compact  # Search all database text? columns
      else
        [table_column[:column].gsub("#{klass.table_name}.", '')] # table_column :order_items, column: 'order_items.title'
      end

      conditions = klass_columns.map { |col_name| "#{klass.table_name}.#{col_name} #{ilike} :term" }

      klass.where(conditions.join(' OR '), term: "%#{term}%", num: term.to_i).flat_map { |klass| (klass.send(inverse.name).pluck(:id) rescue []) }
    end

    collection.public_send(sql_op, id: ids)
  when :obfuscated_id
    if (deobfuscated_id = collection.deobfuscate(term)) == term # We weren't able to deobfuscate it, so this is an Invalid ID
      collection.public_send(sql_op, "#{column} = :term", term: 0)
    else
      collection.public_send(sql_op, "#{column} = :term", term: deobfuscated_id)
    end
  when :effective_address
    ids = Effective::Address
      .where('addressable_type = ?', collection_class.name)
      .where("address1 #{ilike} :term OR address2 #{ilike} :term OR city #{ilike} :term OR postal_code #{ilike} :term OR state_code = :code OR country_code = :code", term: "%#{term}%", code: term)
      .pluck(:addressable_id)

    collection.public_send(sql_op, id: ids)
  when :effective_roles
    collection.with_role(term)
  when :datetime, :date
    begin
      digits = term.scan(/(\d+)/).flatten.map(&:to_i)
      start_at = Time.zone.local(*digits)

      case digits.length
      when 1  # Year
        end_at = start_at.end_of_year
      when 2 # Year-Month
        end_at = start_at.end_of_month
      when 3 # Year-Month-Day
        end_at = start_at.end_of_day
      when 4 # Year-Month-Day Hour
        end_at = start_at.end_of_hour
      when 5 # Year-Month-Day Hour-Minute
        end_at = start_at.end_of_minute
      when 6
        end_at = start_at + 1.second
      else
        end_at = start_at
      end

      collection.public_send(sql_op, "#{column} >= :start_at AND #{column} <= :end_at", start_at: start_at, end_at: end_at)
    rescue => e
      collection
    end
  when :boolean
    collection.public_send(sql_op, "#{column} = :term", term: [1, 'true', 'yes'].include?(term.to_s.downcase))
  when :integer
    collection.public_send(sql_op, "#{column} = :term", term: term.gsub(/\D/, '').to_i)
  when :year
    collection.public_send(sql_op, "EXTRACT(YEAR FROM #{column}) = :term", term: term.to_i)
  when :price
    price_in_cents = (term.gsub(/[^0-9|\.]/, '').to_f * 100.0).to_i
    collection.public_send(sql_op, "#{column} = :term", term: price_in_cents)
  when :currency, :decimal
    collection.public_send(sql_op, "#{column} = :term", term: term.gsub(/[^0-9|\.]/, '').to_f)
  else
    collection.public_send(sql_op, "#{column} = :term", term: term)
  end
end

#search_terms ⇒ Object 



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# File 'app/models/effective/active_record_datatable_tool.rb', line 12

def search_terms
  @search_terms ||= @datatable.search_terms.select { |name, search_term| table_columns.key?(name) }
end