Древовидные справочники: parent_id, drag&drop, древовидный выбор в полях table
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migrations/0055_data_table_rows_hierarchy.sql
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migrations/0055_data_table_rows_hierarchy.sql
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-- Add hierarchy support to data table rows
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ALTER TABLE data_table_rows ADD COLUMN IF NOT EXISTS parent_id INTEGER;
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CREATE INDEX IF NOT EXISTS data_table_rows_table_parent_position_idx
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ON data_table_rows(table_id, parent_id, position);
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