Class: Pakyow::Data::Adapters::Sql::Differ Private

Inherits:
Object
  • Object
show all
Defined in:
lib/pakyow/data/adapters/sql/differ.rb

This class is part of a private API. You should avoid using this class if possible, as it may be removed or be changed in the future.

Instance Method Summary collapse

Constructor Details

#initialize(connection:, source:, attributes: source.attributes) ⇒ Differ

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Returns a new instance of Differ.



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# File 'lib/pakyow/data/adapters/sql/differ.rb', line 9

def initialize(connection:, source:, attributes: source.attributes)
  @connection, @source, @attributes = connection, source, attributes
end

Instance Method Details

#attributes ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/pakyow/data/adapters/sql/differ.rb', line 25

def attributes
  Hash[@attributes.map { |attribute_name, attribute|
    [attribute_name, @connection.adapter.finalized_attribute(attribute)]
  }]
end

#attributes_to_add ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/pakyow/data/adapters/sql/differ.rb', line 31

def attributes_to_add
  {}.tap { |attributes|
    self.attributes.each do |attribute_name, attribute_type|
      unless schema.find { |column| column[0] == attribute_name }
        attributes[attribute_name] = attribute_type
      end
    end
  }
end

#changes? ⇒ Boolean

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Returns:

  • (Boolean) 


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# File 'lib/pakyow/data/adapters/sql/differ.rb', line 17

def changes?
  attributes_to_add.any? || columns_to_remove.any? || column_types_to_change.any?
end

#column_types_to_change ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/pakyow/data/adapters/sql/differ.rb', line 51

def column_types_to_change
  {}.tap { |attributes|
    self.attributes.each do |attribute_name, attribute_type|
      if found_column = schema.find { |column| column[0] == attribute_name }
        column_name, column_info = found_column
        unless column_info[:type] == attribute_type.meta[:column_type] && (!attribute_type.meta.include?(:native_type) || column_info[:db_type] == attribute_type.meta[:native_type])
          attributes[column_name] = attribute_type.meta[:migration_type]
        end
      end
    end
  }
end

#columns_to_remove ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/pakyow/data/adapters/sql/differ.rb', line 41

def columns_to_remove
  {}.tap { |columns|
    schema.each do |column_name, column_info|
      unless @source.attributes.keys.find { |attribute_name| attribute_name == column_name }
        columns[column_name] = column_info
      end
    end
  }
end

#exists? ⇒ Boolean

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Returns:

  • (Boolean) 


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# File 'lib/pakyow/data/adapters/sql/differ.rb', line 13

def exists?
  raw_connection.table_exists?(table_name)
end

#table_name ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/pakyow/data/adapters/sql/differ.rb', line 21

def table_name
  @source.dataset_table
end