Class | ActiveRecord::ConnectionAdapters::AbstractAdapter |
In: |
lib/active_record/connection_adapters/abstract_adapter.rb
|
Parent: | Object |
All the concrete database adapters follow the interface laid down in this class. You can use this interface directly by borrowing the database connection from the Base with Base.connection.
Most of the methods in the adapter are useful during migrations. Most notably, SchemaStatements#create_table, SchemaStatements#drop_table, SchemaStatements#add_index, SchemaStatements#remove_index, SchemaStatements#add_column, SchemaStatements#change_column and SchemaStatements#remove_column are very useful.
Returns the human-readable name of the adapter. Use mixed case - one can always use downcase if needed.
Should primary key values be selected from their corresponding sequence before the insert statement? If true, next_sequence_value is called before each insert to set the record’s primary key. This is false for all adapters but Firebird.
Does this adapter support migrations? Backend specific, as the abstract adapter always returns false.