fix: resolve entities correctly in datasource when globs are specified

src/data-source/DataSource.ts

@@ -669,10 +669,11 @@ export class DataSource {
         )
 
         // set current data source to the entities
-        for (let entityKey in flattenedEntities) {
-            const entity = flattenedEntities[entityKey]
-            if (InstanceChecker.isBaseEntityConstructor(entity)) {
-                entity.useDataSource(this)
+        for (let entityMetadata of entityMetadatas) {
+            if (
+                InstanceChecker.isBaseEntityConstructor(entityMetadata.target)
+            ) {
+                entityMetadata.target.useDataSource(this)
             }
         }
     }

src/repository/BaseEntity.ts

@@ -27,8 +27,7 @@ export class BaseEntity {
     /**
      * DataSource used in all static methods of the BaseEntity.
      */
-    // @ts-ignore: Unused variable which is actually used
-    private static dataSource?: DataSource
+    private static dataSource: DataSource | null
 
     // -------------------------------------------------------------------------
     // Public Methods
@@ -95,7 +94,7 @@ export class BaseEntity {
     /**
      * Sets DataSource to be used by entity.
      */
-    static useDataSource(dataSource: DataSource) {
+    static useDataSource(dataSource: DataSource | null) {
         this.dataSource = dataSource
     }
 

test/functional/base-entity/base-entity.test.ts

@@ -12,6 +12,31 @@ describe("base entity", () => {
         })
         if (!dataSourceOptions.length) return
 
+        // reset data source just to make sure inside DataSource it's really being set
+        User.useDataSource(null)
+
+        const dataSource = new DataSource(dataSourceOptions[0])
+        await dataSource.initialize()
+        await dataSource.synchronize(true)
+
+        await User.save({ name: "Timber Saw" })
+        const timber = await User.findOneByOrFail({ name: "Timber Saw" })
+        expect(timber).to.be.eql({
+            id: 1,
+            name: "Timber Saw",
+        })
+    })
+
+    it("test if DataSource calls `useDataSource` of the provided entities in the entities directory", async () => {
+        const dataSourceOptions = setupTestingConnections({
+            entities: [__dirname + "/entity/*{.js,.ts}"],
+            enabledDrivers: ["sqlite"],
+        })
+        if (!dataSourceOptions.length) return
+
+        // reset data source just to make sure inside DataSource it's really being set
+        User.useDataSource(null)
+
         const dataSource = new DataSource(dataSourceOptions[0])
         await dataSource.initialize()
         await dataSource.synchronize(true)