#6442 fix: @JoinTable does not respect inverseJoinColumns referenced column width

src/metadata-builder/JunctionEntityMetadataBuilder.ts

@@ -113,6 +113,7 @@ export class JunctionEntityMetadataBuilder {
                         && (inverseReferencedColumn.generationStrategy === "uuid" || inverseReferencedColumn.type === "uuid")
                             ? "36"
                             : inverseReferencedColumn.length, // fix https://github.com/typeorm/typeorm/issues/3604
+                        width: inverseReferencedColumn.width, // fix https://github.com/typeorm/typeorm/issues/6442
                         type: inverseReferencedColumn.type,
                         precision: inverseReferencedColumn.precision,
                         scale: inverseReferencedColumn.scale,

test/github-issues/6642/entity/v1/entities.ts

@@ -0,0 +1,18 @@
+import { PrimaryColumn, Generated, Column, Entity } from "../../../../../src";
+
+@Entity()
+export class FooEntity {
+    @PrimaryColumn({ type: "int", width: 10, unsigned: true, nullable: false })
+    @Generated()
+    public id: number;
+}
+
+@Entity()
+export class BarEntity {
+    @PrimaryColumn({ type: "int", width: 10, unsigned: true })
+    @Generated()
+    public id: number;
+
+    @Column("varchar", { nullable: false, length: 50 })
+    public code: string;
+}

test/github-issues/6642/entity/v2/entities.ts

@@ -0,0 +1,34 @@
+import { PrimaryColumn, Generated, ManyToMany, Entity, Column, JoinTable } from "../../../../../src";
+
+@Entity()
+export class FooEntity {
+    @PrimaryColumn({ type: "int", width: 10, unsigned: true, nullable: false })
+    @Generated()
+    public id: number;
+
+    @ManyToMany(() => BarEntity)
+    @JoinTable({
+        name: "foo_bars",
+        joinColumns: [
+            {
+                name: "foo_id",
+            }
+        ],
+        inverseJoinColumns: [
+            {
+                name: "bar_id",
+            }
+        ]
+    })
+    public fooBars: BarEntity[];
+}
+
+@Entity()
+export class BarEntity {
+    @PrimaryColumn({ type: "int", width: 10, unsigned: true })
+    @Generated()
+    public id: number;
+
+    @Column("varchar", { nullable: false, length: 50 })
+    public code: string;
+}

test/github-issues/6642/issue-6642.ts

@@ -0,0 +1,67 @@
+import "reflect-metadata";
+import {
+    closeTestingConnections,
+    createTestingConnections,
+    reloadTestingDatabases,
+    setupSingleTestingConnection
+} from "../../utils/test-utils";
+import { Connection, createConnection } from "../../../src";
+import { fail } from "assert";
+import { Query } from "../../../src/driver/Query";
+import { MysqlConnectionOptions } from "../../../src/driver/mysql/MysqlConnectionOptions";
+
+describe("github issues > #6642 JoinTable does not respect inverseJoinColumns referenced column width", () => {
+    let connections: Connection[];
+
+    before(async () => {
+        return connections = await createTestingConnections({
+            entities: [__dirname + "/entity/v1/*{.js,.ts}"],
+            schemaCreate: true,
+            dropSchema: true,
+            enabledDrivers: ["mysql"]
+        });
+    });
+    beforeEach(async () => await reloadTestingDatabases(connections));
+    after(async () => await closeTestingConnections(connections));
+
+    it("should generate column widths equal to the referenced column widths", async () => {
+
+        await Promise.all(connections.map(async (connection) => {
+            const options = setupSingleTestingConnection(
+                connection.options.type,
+                {
+                    name: `${connection.name}-v2`,
+                    entities: [__dirname + "/entity/v2/*{.js,.ts}"],
+                    dropSchema: false,
+                    schemaCreate: false
+                }
+            ) as MysqlConnectionOptions;
+
+            if (!options) {
+                await connection.close();
+                fail();
+            }
+
+            const migrationConnection = await createConnection(options);
+            try {
+                const sqlInMemory = await migrationConnection.driver
+                    .createSchemaBuilder()
+                    .log();
+
+                const upQueries = sqlInMemory.upQueries.map(
+                    (query: Query) => query.query
+                );
+
+                upQueries.should.eql([
+                    "CREATE TABLE `foo_bars` (`foo_id` int(10) UNSIGNED NOT NULL, `bar_id` int(10) UNSIGNED NOT NULL, INDEX `IDX_319290776f044043e3ef3ba5a8` (`foo_id`), INDEX `IDX_b7fd4be386fa7cdb87ef8b12b6` (`bar_id`), PRIMARY KEY (`foo_id`, `bar_id`)) ENGINE=InnoDB",
+                    "ALTER TABLE `foo_bars` ADD CONSTRAINT `FK_319290776f044043e3ef3ba5a8d` FOREIGN KEY (`foo_id`) REFERENCES `foo_entity`(`id`) ON DELETE CASCADE ON UPDATE NO ACTION",
+                    "ALTER TABLE `foo_bars` ADD CONSTRAINT `FK_b7fd4be386fa7cdb87ef8b12b69` FOREIGN KEY (`bar_id`) REFERENCES `bar_entity`(`id`) ON DELETE CASCADE ON UPDATE NO ACTION"
+                ]);
+
+            } finally {
+                await connection.close();
+                await migrationConnection.close();
+            }
+        }));
+    });
+});