fix: resolve migration for UpdateDateColumn without ON UPDATE clause (#…

…7057)

Closes: #6995

src/metadata/ColumnMetadata.ts

@@ -421,6 +421,8 @@ export class ColumnMetadata {
                 this.type = options.connection.driver.mappedDataTypes.updateDate;
             if (!this.default)
                 this.default = () => options.connection.driver.mappedDataTypes.updateDateDefault;
+            if (!this.onUpdate)
+                this.onUpdate = options.connection.driver.mappedDataTypes.updateDateDefault;
             if (this.precision === undefined && options.connection.driver.mappedDataTypes.updateDatePrecision)
                 this.precision = options.connection.driver.mappedDataTypes.updateDatePrecision;
         }

test/github-issues/6995/entity/default-update-date.ts

@@ -0,0 +1,16 @@
+import { PrimaryGeneratedColumn, CreateDateColumn, UpdateDateColumn, Entity } from '../../../../src';
+
+@Entity()
+export class DefaultUpdateDate {
+
+	@PrimaryGeneratedColumn({
+		type: "int"
+	})
+	public id: number;
+
+	@CreateDateColumn()
+	public createdDate: Date;
+
+	@UpdateDateColumn()
+	public updatedDate: Date;
+}

test/github-issues/6995/issue-6995.ts

@@ -0,0 +1,25 @@
+import "reflect-metadata";
+import { Connection } from "../../../src";
+import { createTestingConnections, closeTestingConnections } from "../../utils/test-utils";
+import { DefaultUpdateDate } from './entity/default-update-date';
+
+describe("github issues > #6995 Generating migrations for UpdateDateColumn should generate on update clause", () => {
+
+    let connections: Connection[];
+    before(async () => connections = await createTestingConnections({
+        migrations: [],
+        enabledDrivers: ["mysql", "mariadb"],
+        schemaCreate: false,
+        dropSchema: true,
+        entities: [DefaultUpdateDate]
+    }));
+    after(() => closeTestingConnections(connections));
+
+    it("should create migration with default ON UPDATE clause", () => Promise.all(connections.map(async connection => {
+
+        const sqlInMemory = await connection.driver.createSchemaBuilder().log();
+        sqlInMemory.upQueries.filter(i => i.query.includes("ON UPDATE")).length.should.be.greaterThan(0);
+
+    })));
+
+});