chore(utils): patch unique index migration (#11136)

.changeset/fifty-geckos-end.md

@@ -0,0 +1,5 @@
+---
+"@medusajs/utils": patch
+---
+
+chore(utils): patch unique index migration

packages/core/utils/src/dal/mikro-orm/__tests__/ts-migration-generator.spec.ts

@@ -1,7 +1,7 @@
 import { CustomTsMigrationGenerator } from "../mikro-orm-create-connection"
 
 function unwrapSql(sql: string) {
-  return sql.toString().match(/this.addSql\(`(.*?)`\)/)?.[1]
+  return sql.toString().match(/this.addSql\(`([\s\S]*?)`\)/m)?.[1]
 }
 
 describe("CustomTsMigrationGenerator", () => {

packages/core/utils/src/dal/mikro-orm/mikro-orm-create-connection.ts

@@ -7,6 +7,42 @@ import { normalizeMigrationSQL } from "../utils"
 type FilterDef = Parameters<typeof MikroORMFilter>[0]
 
 export class CustomTsMigrationGenerator extends TSMigrationGenerator {
+  // TODO: temporary fix to drop unique constraint before creating unique index
+  private dropUniqueConstraintBeforeUniqueIndex(
+    sqlPatches: string[],
+    sql: string
+  ) {
+    // DML unique index
+    const uniqueIndexName = sql.match(/"IDX_(.+?)_unique"/)?.[1]
+    if (!uniqueIndexName) {
+      return
+    }
+
+    // Add drop unique constraint if it exists, using the same name as index without IDX_ prefix
+    const tableName = sql.match(/ON "(.+?)"/)?.[1]
+    if (tableName) {
+      sqlPatches.push(
+        `alter table if exists "${tableName}" drop constraint if exists "${uniqueIndexName}_unique";`
+      )
+    }
+  }
+
+  generateMigrationFile(
+    className: string,
+    diff: { up: string[]; down: string[] }
+  ): string {
+    const sqlPatches: string[] = []
+    for (const sql of diff.up) {
+      this.dropUniqueConstraintBeforeUniqueIndex(sqlPatches, sql)
+    }
+
+    for (const sql of sqlPatches) {
+      diff.up.unshift(sql)
+    }
+
+    return super.generateMigrationFile(className, diff)
+  }
+
   createStatement(sql: string, padLeft: number): string {
     if (isString(sql)) {
       sql = normalizeMigrationSQL(sql)