Module: ActiveRecordSchema::SchemaDiff

Extended by:
ActiveSupport::Concern
Included in:
Schema
Defined in:
lib/active_record_schema/schema_diff.rb

Instance Method Summary collapse

Instance Method Details

#_column_names ⇒ Object 



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# File 'lib/active_record_schema/schema_diff.rb', line 31

def _column_names
  _connection.columns(_table).map(&:name)
end

#_connection ⇒ Object 



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# File 'lib/active_record_schema/schema_diff.rb', line 23

def _connection
  ActiveRecord::Base.connection
end

#_diff_fields_add ⇒ Object 



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# File 'lib/active_record_schema/schema_diff.rb', line 10

def _diff_fields_add
  model.schema.fields.values.delete_if {|field| _column_names.include?(field.name.to_s) }
end

#_diff_indexes_add ⇒ Object 



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# File 'lib/active_record_schema/schema_diff.rb', line 14

def _diff_indexes_add
  model.schema.indexes.values.delete_if {|index| _index_names.include?(index.name.to_s) }
end

#_diff_joins_add ⇒ Object 



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# File 'lib/active_record_schema/schema_diff.rb', line 18

def _diff_joins_add
  model.schema.joins.values.delete_if {|join| _table_names.include?(join.table.to_s) }
end

#_index_names ⇒ Object 



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# File 'lib/active_record_schema/schema_diff.rb', line 35

def _index_names
  _connection.indexes(_table).map(&:name)      
end

#_table ⇒ Object 



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# File 'lib/active_record_schema/schema_diff.rb', line 27

def _table
  model.table_name
end

#_table_names ⇒ Object 



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# File 'lib/active_record_schema/schema_diff.rb', line 39

def _table_names
  _connection.tables
end

#diff(*args) ⇒ Object 



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# File 'lib/active_record_schema/schema_diff.rb', line 5

def diff(*args)
  diff_method = "_diff_" << args.join('_')
  self.respond_to?(diff_method) ? self.send(diff_method) : []
end