50 lines
2.1 KiB
MySQL
50 lines
2.1 KiB
MySQL
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-- Migration: Refactor configs to link via tasks.config_id
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-- This migration adds config_id to tasks table and migrates existing configs to tasks
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-- After migration: configs only contain words_count, max_cards (name and try_message removed)
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-- ============================================
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-- Step 1: Add config_id to tasks
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-- ============================================
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ALTER TABLE tasks
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ADD COLUMN IF NOT EXISTS config_id INTEGER REFERENCES configs(id) ON DELETE SET NULL;
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CREATE INDEX IF NOT EXISTS idx_tasks_config_id ON tasks(config_id);
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-- Unique index: only one task per config
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CREATE UNIQUE INDEX IF NOT EXISTS idx_tasks_config_id_unique
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ON tasks(config_id) WHERE config_id IS NOT NULL AND deleted = FALSE;
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COMMENT ON COLUMN tasks.config_id IS 'Link to test config. NULL if task is not a test.';
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-- ============================================
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-- Step 2: Migrate existing configs to tasks
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-- Create a task for each config that doesn't have one yet
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-- ============================================
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INSERT INTO tasks (user_id, name, reward_message, repetition_period, repetition_date, config_id)
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SELECT
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c.user_id,
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c.name, -- Config name -> Task name
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c.try_message, -- try_message -> reward_message
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'0 day'::INTERVAL, -- repetition_period = 0 (infinite task)
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'0 week', -- repetition_date = 0 (infinite task)
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c.id -- Link to config
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FROM configs c
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WHERE c.name IS NOT NULL -- Only configs with names
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AND NOT EXISTS (
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SELECT 1 FROM tasks t WHERE t.config_id = c.id AND t.deleted = FALSE
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);
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-- ============================================
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-- Step 3: Remove name and try_message from configs
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-- These are now stored in the linked task
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-- ============================================
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ALTER TABLE configs DROP COLUMN IF EXISTS name;
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ALTER TABLE configs DROP COLUMN IF EXISTS try_message;
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-- ============================================
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-- Comments for documentation
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-- ============================================
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COMMENT ON TABLE configs IS 'Test configurations (words_count, max_cards, dictionary associations). Linked to tasks via tasks.config_id.';
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