Class: EmptyEye::Shard

Inherits:
Object
  • Object
show all
Defined in:
lib/empty_eye/shard.rb

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(association) ⇒ Shard

shard for master_class class tracks associations for database updates managed by primary shard has many of the same interfaces as primary view shard



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# File 'lib/empty_eye/shard.rb', line 8

def initialize(association)
  @association = association
end

Class Method Details

.exclude_always ⇒ Object

exclude from view generation always



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# File 'lib/empty_eye/shard.rb', line 13

def self.exclude_always
  ['id','created_at','updated_at','deleted_at', 'type', 'mti_schema_version']
end

Instance Method Details

#arel_table ⇒ Object

used to create view



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# File 'lib/empty_eye/shard.rb', line 43

def arel_table
  @arel_table ||= begin
    t= Arel::Table.new(table)
    t.table_alias = alias_name if alias_name != table
    t
  end
end

#association ⇒ Object

association that this shard will build upon



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# File 'lib/empty_eye/shard.rb', line 18

def association
  @association
end

#columns ⇒ Object

the table columns that will be extended in sql



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# File 'lib/empty_eye/shard.rb', line 23

def columns
  restrictions - exclude
end

#foreign_key ⇒ Object

foreign key of the shard; used in view generation and database updates



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# File 'lib/empty_eye/shard.rb', line 52

def foreign_key
  association.foreign_key 
end

#klass ⇒ Object 



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# File 'lib/empty_eye/shard.rb', line 56

def klass
  association.klass
end

#name ⇒ Object

name of the association



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# File 'lib/empty_eye/shard.rb', line 38

def name
  association.name
end

#polymorphic_type ⇒ Object 



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# File 'lib/empty_eye/shard.rb', line 70

def polymorphic_type
  return unless association.options[:as]
  "#{association.options[:as]}_type"
end

#primary ⇒ Object

never the primary



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# File 'lib/empty_eye/shard.rb', line 28

def primary
  false
end

#table ⇒ Object

table of the shard



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# File 'lib/empty_eye/shard.rb', line 33

def table
  association.table_name
end

#type_column ⇒ Object

arel column of polymorphic type field



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# File 'lib/empty_eye/shard.rb', line 61

def type_column
  arel_table[polymorphic_type.to_sym] if polymorphic_type
end

#type_value ⇒ Object

value of the polymorphic column



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# File 'lib/empty_eye/shard.rb', line 66

def type_value
  master_class.base_class.name if polymorphic_type
end