added test for #1388

docker-compose.yml

@@ -1,6 +1,18 @@
 version: '3'
 services:
 
+  # mysql-5.5
+  #mysql5.5:
+  #  image: "mysql:5.5"
+  #  container_name: "typeorm-mysql-5.5"
+  #  ports:
+  #    - "3306:3306"
+  #  environment:
+  #    MYSQL_ROOT_PASSWORD: "admin"
+  #    MYSQL_USER: "test"
+  #    MYSQL_PASSWORD: "test"
+  #    MYSQL_DATABASE: "test"
+
   # mysql
   mysql:
     image: "mysql:5.7.10"

test/github-issues/1388/entity/Post.ts

@@ -0,0 +1,12 @@
+import {Column, Entity, PrimaryGeneratedColumn} from "../../../../src";
+
+@Entity()
+export class Post {
+
+    @PrimaryGeneratedColumn()
+    id: number;
+
+    @Column({ type: "timestamp", nullable: true })
+    createdAt: Date;
+
+}

test/github-issues/1388/issue-1388.ts

@@ -0,0 +1,25 @@
+import "reflect-metadata";
+import {Connection} from "../../../src/connection/Connection";
+import {closeTestingConnections, createTestingConnections} from "../../utils/test-utils";
+
+describe("github issues > #1388 nullable: true dons't output 'NULL' in mysql", () => {
+
+    let connections: Connection[];
+    before(async () => {
+        connections = await createTestingConnections({
+            entities: [__dirname + "/entity/*{.js,.ts}"],
+            enabledDrivers: ["mysql"],
+            schemaCreate: true,
+            dropSchema: true,
+        });
+    });
+    after(() => closeTestingConnections(connections));
+
+    it("should correctly create nullable column", () => Promise.all(connections.map(async connection => {
+        const queryRunner = connection.createQueryRunner();
+        const table = await queryRunner.getTable("post");
+        table!.findColumnByName("createdAt")!.isNullable.should.be.true;
+        await queryRunner.release();
+    })));
+
+});