Module: Partitioned::ActiveRecordOverrides

Included in:
PartitionedBase
Defined in:
lib/partitioned/active_record_overrides.rb

Overview

methods that need to be override in an ActiveRecord::Base derived class so that we can support partitioning

Instance Method Summary collapse

Instance Method Details

#arel_attributes_values(include_primary_key = true, include_readonly_attributes = true, attribute_names = @attributes.keys) ⇒ Hash

arel_attribute_values needs to return attributes (and their values) associated with the dynamic_arel_table instead of the static arel_table provided by ActiveRecord.

The standard release of this function gathers a collection of attributes and creates a wrapper function around them that names the table they are associated with. that naming is incorrect for partitioned tables.

We call the standard releases method then retrofit our partitioned table into the hash that is returned.

Parameters:

  • include_primary_key (Boolean) (defaults to: true) —

    (true)

  • include_readonly_attributes (Boolean) (defaults to: true) —

    (true)

  • attribute_names (Boolean) (defaults to: @attributes.keys) —

    (@attributes.keys)

Returns:

  • (Hash) —

    hash of key value pairs associated with persistent attributes



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# File 'lib/partitioned/active_record_overrides.rb', line 24

def arel_attributes_values(include_primary_key = true, include_readonly_attributes = true, attribute_names = @attributes.keys)
  attrs = super
  actual_arel_table = dynamic_arel_table()
  return Hash[*attrs.map{|k,v| [actual_arel_table[k.name], v]}.flatten]
end

#delete ⇒ optional

Delete just needs a wrapper around it to specify the specific partition.

Returns:

  • (optional) —

    undefined



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# File 'lib/partitioned/active_record_overrides.rb', line 34

def delete
  if persisted?
    self.class.from_partition(*self.class.partition_key_values(attributes)).delete(id)
  end
  @destroyed = true
  freeze
end