add back data loss confirmation handling

packages/db/package.json

@@ -74,6 +74,7 @@
     "open": "^10.0.3",
     "ora": "^7.0.1",
     "prompts": "^2.4.2",
+    "strip-ansi": "^7.1.0",
     "yargs-parser": "^21.1.1",
     "zod": "^3.22.4"
   },

packages/db/src/core/cli/commands/push/index.ts

@@ -6,9 +6,11 @@ import { getRemoteDatabaseUrl } from '../../../utils.js';
 import {
 	createCurrentSnapshot,
 	createEmptySnapshot,
+	formatDataLossMessage,
 	getMigrationQueries,
 	getProductionCurrentSnapshot,
 } from '../../migration-queries.js';
+import { red } from 'kleur/colors';
 
 export async function cmd({
 	dbConfig,
@@ -24,7 +26,7 @@ export async function cmd({
 	const productionSnapshot = await getProductionCurrentSnapshot({ appToken: appToken.token });
 	const currentSnapshot = createCurrentSnapshot(dbConfig);
 	const isFromScratch = isForceReset || JSON.stringify(productionSnapshot) === '{}';
-	const { queries: migrationQueries } = await getMigrationQueries({
+	const { queries: migrationQueries, confirmations } = await getMigrationQueries({
 		oldSnapshot: isFromScratch ? createEmptySnapshot() : productionSnapshot,
 		newSnapshot: currentSnapshot,
 	});
@@ -35,6 +37,14 @@ export async function cmd({
 	} else {
 		console.log(`Database schema is out of date.`);
 	}
+
+	if (isForceReset) {
+		console.log(`Force-pushing to the database. All existing data will be erased.`);
+	} else if (confirmations.length > 0) {
+		console.log('\n' + formatDataLossMessage(confirmations) + '\n');
+		throw new Error('Exiting.');
+	}
+
 	if (isDryRun) {
 		console.log('Statements:', JSON.stringify(migrationQueries, undefined, 2));
 	} else {

packages/db/src/core/cli/commands/verify/index.ts

@@ -5,6 +5,7 @@ import type { DBConfig } from '../../../types.js';
 import {
 	createCurrentSnapshot,
 	createEmptySnapshot,
+	formatDataLossMessage,
 	getMigrationQueries,
 	getProductionCurrentSnapshot,
 } from '../../migration-queries.js';
@@ -17,21 +18,39 @@ export async function cmd({
 	dbConfig: DBConfig;
 	flags: Arguments;
 }) {
+	const isJson = flags.json;
 	const appToken = await getManagedAppTokenOrExit(flags.token);
 	const productionSnapshot = await getProductionCurrentSnapshot({ appToken: appToken.token });
 	const currentSnapshot = createCurrentSnapshot(dbConfig);
-	const { queries: migrationQueries } = await getMigrationQueries({
+	const { queries: migrationQueries, confirmations } = await getMigrationQueries({
 		oldSnapshot:
 			JSON.stringify(productionSnapshot) !== '{}' ? productionSnapshot : createEmptySnapshot(),
 		newSnapshot: currentSnapshot,
 	});
 
+	const result = { exitCode: 0, message: '', code: '', data: undefined as unknown };
 	if (migrationQueries.length === 0) {
-		console.log(`Database schema is up to date.`);
+		result.code = 'MATCH';
+		result.message = `Database schema is up to date.`;
 	} else {
-		console.log(`Database schema is out of date.`);
-		console.log(`Run 'astro db push' to push up your latest changes.`);
+		result.code = 'NO_MATCH';
+		result.message = `Database schema is out of date.\nRun 'astro db push' to push up your latest changes.`;
+	}
+
+
+	if (confirmations.length > 0) { 
+		result.code = 'DATA_LOSS';
+		result.exitCode = 1;
+		result.data = confirmations;
+		result.message = formatDataLossMessage(confirmations, !isJson);
+	}
+
+	if (isJson) {
+		console.log(JSON.stringify(result));
+	} else {
+		console.log(result.message);	
 	}
 
 	await appToken.destroy();
+	process.exit(result.exitCode);
 }

packages/db/src/core/cli/migration-queries.ts

@@ -1,3 +1,4 @@
+import stripAnsi from 'strip-ansi';
 import deepDiff from 'deep-diff';
 import { SQLiteAsyncDialect } from 'drizzle-orm/sqlite-core';
 import * as color from 'kleur/colors';
@@ -147,21 +148,12 @@ export async function getCollectionChangeQueries({
 	if (dataLossCheck.dataLoss) {
 		const { reason, columnName } = dataLossCheck;
 		const reasonMsgs: Record<DataLossReason, string> = {
-			'added-required': `New column ${color.bold(
+			'added-required': `You added new required column '${color.bold(
 				collectionName + '.' + columnName
-			)} is required with no default value.\nThis requires deleting existing data in the ${color.bold(
-				collectionName
-			)} collection.`,
-			'added-unique': `New column ${color.bold(
+			)}' with no default value.\n      This cannot be executed on an existing table.`,
+			'updated-type': `Updating existing column ${color.bold(
 				collectionName + '.' + columnName
-			)} is marked as unique.\nThis requires deleting existing data in the ${color.bold(
-				collectionName
-			)} collection.`,
-			'updated-type': `Updated column ${color.bold(
-				collectionName + '.' + columnName
-			)} cannot convert data to new column data type.\nThis requires deleting existing data in the ${color.bold(
-				collectionName
-			)} collection.`,
+			)} to a new type that cannot be handled automatically.`,
 		};
 		confirmations.push(reasonMsgs[reason]);
 	}
@@ -319,7 +311,7 @@ function canAlterTableDropColumn(column: DBColumn) {
 	return true;
 }
 
-type DataLossReason = 'added-required' | 'added-unique' | 'updated-type';
+type DataLossReason = 'added-required' | 'updated-type';
 type DataLossResponse =
 	| { dataLoss: false }
 	| { dataLoss: true; columnName: string; reason: DataLossReason };
@@ -335,9 +327,6 @@ function canRecreateTableWithoutDataLoss(
 		if (!a.schema.optional && !hasDefault(a)) {
 			return { dataLoss: true, columnName, reason: 'added-required' };
 		}
-		if (!a.schema.optional && a.schema.unique) {
-			return { dataLoss: true, columnName, reason: 'added-unique' };
-		}
 	}
 	for (const [columnName, u] of Object.entries(updated)) {
 		if (u.old.type !== u.new.type && !canChangeTypeWithoutQuery(u.old, u.new)) {
@@ -454,3 +443,18 @@ export function createCurrentSnapshot({ tables = {} }: DBConfig): DBSnapshot {
 export function createEmptySnapshot(): DBSnapshot {
 	return { experimentalVersion: 1, schema: {} };
 }
+
+export function formatDataLossMessage(confirmations: string[], isColor = true): string {
+	const messages = [];
+	messages.push(color.red('✖ We found some schema changes that cannot be handled automatically:'));
+	messages.push(``);
+	messages.push(...confirmations.map((m, i) => color.red(`  (${i + 1}) `) + m));
+	messages.push(``);
+	messages.push(`To resolve, revert these changes or update your schema, and re-run the command.`);
+	messages.push(`You may also run 'astro db push --force-reset' to ignore all warnings and force-push your local database schema to production instead. All data will be lost and the database will be reset.`);
+	let finalMessage = messages.join('\n');
+	if (!isColor) {
+		finalMessage = stripAnsi(finalMessage);
+	}
+	return finalMessage;
+}

packages/db/test/fixtures/ticketing-example/db/config.ts

@@ -10,6 +10,8 @@ const Event = defineTable({
 		ticketPrice: column.number(),
 		date: column.date(),
 		location: column.text(),
+		author3: column.text(),
+		author4: column.text(),
 	},
 });