Changeset 0.8.5 (#48)

server/database/migrations/019_user_model_preferences.sql

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+-- ==========================================
+-- Migration 019: (superseded by 020)
+-- ==========================================
+-- Original CREATE TABLE IF NOT EXISTS was a no-op because
+-- user_model_preferences already existed from migration 005.
+-- The actual rework is in 020_user_model_preferences_rework.sql.
+-- ==========================================
+SELECT 1;

server/database/migrations/020_user_model_preferences_rework.sql

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+-- ==========================================
+-- Migration 019: User Model Preferences (rework)
+-- ==========================================
+-- The user_model_preferences table was created in 005 with:
+--   id UUID PK, user_id UUID, model_config_id UUID FK, is_enabled BOOL
+-- That schema ties preferences to model_configs rows (global only).
+-- We need string-based model_id to support personal provider models too,
+-- plus a 'hidden' column with clearer semantics.
+--
+-- Strategy: add new columns, add unique constraint for UPSERT.
+-- Old columns (model_config_id, is_enabled) remain for backward compat.
+-- ==========================================
+
+-- Add new columns if they don't exist
+ALTER TABLE user_model_preferences ADD COLUMN IF NOT EXISTS model_id VARCHAR(255);
+ALTER TABLE user_model_preferences ADD COLUMN IF NOT EXISTS hidden BOOLEAN DEFAULT false;
+ALTER TABLE user_model_preferences ADD COLUMN IF NOT EXISTS updated_at TIMESTAMPTZ DEFAULT NOW();
+
+-- Make model_config_id nullable (new rows use model_id instead)
+ALTER TABLE user_model_preferences ALTER COLUMN model_config_id DROP NOT NULL;
+
+-- Unique constraint for UPSERT — NULLs are distinct in PG so old rows won't conflict
+CREATE UNIQUE INDEX IF NOT EXISTS idx_user_model_pref_user_model
+    ON user_model_preferences (user_id, model_id);