feat: add name to MigrationInterface (fixes #3933 and fixes #2549) (#…

…4873)

src/commands/MigrationGenerateCommand.ts

@@ -128,9 +128,12 @@ export class MigrationGenerateCommand implements yargs.CommandModule {
      * Gets contents of the migration file.
      */
     protected static getTemplate(name: string, timestamp: number, upSqls: string[], downSqls: string[]): string {
+        const migrationName = `${camelCase(name, true)}${timestamp}`;
+
         return `import {MigrationInterface, QueryRunner} from "typeorm";
 
-export class ${camelCase(name, true)}${timestamp} implements MigrationInterface {
+export class ${migrationName} implements MigrationInterface {
+    name = '${migrationName}'
 
     public async up(queryRunner: QueryRunner): Promise<any> {
 ${upSqls.join(`

src/migration/MigrationExecutor.ts

@@ -314,7 +314,7 @@ export class MigrationExecutor {
      */
     protected getMigrations(): Migration[] {
         const migrations = this.connection.migrations.map(migration => {
-            const migrationClassName = (migration.constructor as any).name;
+            const migrationClassName = migration.name || (migration.constructor as any).name;
             const migrationTimestamp = parseInt(migrationClassName.substr(-13));
             if (!migrationTimestamp)
                 throw new Error(`${migrationClassName} migration name is wrong. Migration class name should have a JavaScript timestamp appended.`);

src/migration/MigrationInterface.ts

@@ -4,6 +4,10 @@ import {QueryRunner} from "../query-runner/QueryRunner";
  * Migrations should implement this interface and all its methods.
  */
 export interface MigrationInterface {
+    /**
+     * Optional migration name, defaults to class name.
+     */
+    name?: string;
 
     /**
      * Run the migrations.