#DATACROW BOOK FILE IMPORT RECURSIVE UPDATE#

SQL Server - supports core import functionality (available as an external gem: activerecord-import-sqlserver.Oracle - supports core import functionality through DML trigger (available as an external gem: activerecord-import-oracle_enhanced.SQLite3 - supports core import functionality (included in activerecord-import 0.1.0 and higher).PostgreSQL - supports core import functionality (included in activerecord-import 0.1.0 and higher).

#DATACROW BOOK FILE IMPORT RECURSIVE UPDATE#

MySQL2 - supports core import functionality plus on duplicate key update support (included in activerecord-import 0.2.0 and higher).MySQL - supports core import functionality plus on duplicate key update support (included in activerecord-import 0.1.0 and higher).The following database adapters are currently supported: import valid_books, validate: false Supported Adapters Without activerecord-import, you'd write something like this:īook = Book. This gem adds an import method (or bulk_import, for compatibility with gems like elasticsearch-model see Conflicts With Other Gems) to ActiveRecord classes. Performs on duplicate key updates (requires MySQL, SQLite 3.24.0+, or Postgres 9.5+).Works with raw columns and arrays of values (fastest).The gem provides the following high-level features: That would be about 4M SQL insert statements vs 3, which results in vastly improved performance. In contrast, the standard ActiveRecord save would generateġ00 insert statements for the publishers, then it would visit each publisher and save all the books:ġ00 * 10,000 = 1,000,000 SQL insert statementsġ00 * 10,000 * 3 = 3M SQL insert statements, This library will follow the associationsĭown and generate only 3 SQL insert statements - one for the publishers, one for the books, and one for the reviews. Say you had a schema like this:Īnd you wanted to bulk insert 100 new publishers with 10K books and 3 reviews per book. Number of SQL insert statements required, avoiding the N+1 insert problem. One of its major features is following activerecord associations and generating the minimal Activerecord-Import is a library for bulk inserting data using ActiveRecord.

Datacrow book file import recursive