Class: PgShrink::SubTableOperator

Inherits:
Object
  • Object
show all
Defined in:
lib/pg_shrink/sub_table_operator.rb

Direct Known Subclasses

SubTableFilter, SubTableSanitizer

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(parent, table_name, opts = {}) ⇒ SubTableOperator

Returns a new instance of SubTableOperator.



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# File 'lib/pg_shrink/sub_table_operator.rb', line 28

def initialize(parent, table_name, opts = {})
  self.parent = parent
  self.table_name = table_name
  self.database = parent.database
  @opts = default_opts.merge(opts)

  validate_opts!(@opts)
end

Instance Attribute Details

#database ⇒ Object

Returns the value of attribute database.



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# File 'lib/pg_shrink/sub_table_operator.rb', line 3

def database
  @database
end

#parent ⇒ Object

Returns the value of attribute parent.



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# File 'lib/pg_shrink/sub_table_operator.rb', line 3

def parent
  @parent
end

#table_name ⇒ Object

Returns the value of attribute table_name.



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# File 'lib/pg_shrink/sub_table_operator.rb', line 3

def table_name
  @table_name
end

Instance Method Details

#default_opts ⇒ Object 



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# File 'lib/pg_shrink/sub_table_operator.rb', line 4

def default_opts
  {:foreign_key =>
    "#{ActiveSupport::Inflector.singularize(parent.table_name.to_s)}_id",
   :primary_key => :id
  }
end

#name ⇒ Object 



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# File 'lib/pg_shrink/sub_table_operator.rb', line 11

def name
  "#{table_name} #{self.class.name.demodulize} from #{parent.table_name}"
end

#propagate!(old_parent_data, new_parent_data) ⇒ Object 



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# File 'lib/pg_shrink/sub_table_operator.rb', line 37

def propagate!(old_parent_data, new_parent_data)
  raise "Implement in subclass"
end

#table ⇒ Object 



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# File 'lib/pg_shrink/sub_table_operator.rb', line 15

def table
  database.table(table_name)
end

#validate_opts!(opts) ⇒ Object 



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# File 'lib/pg_shrink/sub_table_operator.rb', line 19

def validate_opts!(opts)
  if opts[:type_key] && !opts[:type]
    raise "Error:  #{name} has type_key set but no type"
  end
  if opts[:type] && !opts[:type_key]
    raise "Error:  #{name} has type set but no type_key"
  end
end