out_sql: fix unmapped columns being explicitly set to NULL on INSERT#169
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When using `column_mapping`, columns that are not mapped should be ignored during the INSERT query, allowing the database to apply its default values (e.g., `DEFAULT NOW()`). However, the previous implementation passed only the array of record objects to `activerecord-import`, which caused ActiveRecord to automatically fill unmapped columns with `nil` and insert them as `NULL`. Signed-off-by: Shizuo Fujita <fujita@clear-code.com>
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When using
column_mapping, columns that are not mapped should be ignored during the INSERT query, allowing the database to apply its default values (e.g.,DEFAULT NOW()).However, the previous implementation passed only the array of record objects to
activerecord-import, which caused ActiveRecord to automatically fill unmapped columns withniland insert them asNULL.Fixes #156