fix: Incorrect migration generated when multiple views are updated in…

… a single migration (#7587)

* test: Add test for github issue 7586

* fix: Oddly indexed views are not dropped in migration (#7586)

Co-authored-by: Svetlozar <ext-svetlozar@getitdone.co>

src/schema-builder/RdbmsSchemaBuilder.ts

@@ -410,6 +410,7 @@ export class RdbmsSchemaBuilder implements SchemaBuilder {
     }
 
     protected async dropOldViews(): Promise<void> {
+        const droppedViews: Set<View> = new Set();
         for (const view of this.queryRunner.loadedViews) {
             const existViewMetadata = this.viewEntityToSyncMetadatas.find(metadata => {
                 const database = metadata.database && metadata.database !== this.connection.driver.database ? metadata.database : undefined;
@@ -427,8 +428,9 @@ export class RdbmsSchemaBuilder implements SchemaBuilder {
 
             // drop an old view
             await this.queryRunner.dropView(view);
-            this.queryRunner.loadedViews.splice(this.queryRunner.loadedViews.indexOf(view), 1);
+            droppedViews.add(view);
         }
+        this.queryRunner.loadedViews = this.queryRunner.loadedViews.filter(view => !droppedViews.has(view));
     }
 
     /**

test/github-issues/7586/entity/Test.ts

@@ -0,0 +1,11 @@
+import {Column, Entity, PrimaryGeneratedColumn} from "../../../../src";
+
+
+@Entity()
+export class TestEntity {
+    @PrimaryGeneratedColumn()
+    id: number
+
+    @Column("varchar")
+    type: string;
+}

test/github-issues/7586/entity/ViewA.ts

@@ -0,0 +1,14 @@
+import {ViewColumn, ViewEntity} from "../../../../src";
+
+@ViewEntity({
+    expression: `
+        select * from test_entity -- V1 simlate view change with comment
+    `
+})
+export class ViewA {
+    @ViewColumn()
+    id: number
+
+    @ViewColumn()
+    type: string;
+}

test/github-issues/7586/entity/ViewB.ts

@@ -0,0 +1,14 @@
+import {ViewColumn, ViewEntity} from "../../../../src";
+
+@ViewEntity({
+    expression: `
+        select * from test_entity -- V1 simlate view change with comment
+    `
+})
+export class ViewB {
+    @ViewColumn()
+    id: number
+
+    @ViewColumn()
+    type: string;
+}

test/github-issues/7586/entity/ViewC.ts

@@ -0,0 +1,14 @@
+import {ViewColumn, ViewEntity} from "../../../../src";
+
+@ViewEntity({
+    expression: `
+        select * from test_entity -- V1 simlate view change with comment
+    `
+})
+export class ViewC {
+    @ViewColumn()
+    id: number
+
+    @ViewColumn()
+    type: string;
+}

test/github-issues/7586/issue-7586.ts

@@ -0,0 +1,30 @@
+import "reflect-metadata";
+import {Connection} from "../../../src";
+import {closeTestingConnections, createTestingConnections} from "../../utils/test-utils";
+import {TestEntity} from "./entity/Test";
+import {ViewA} from "./entity/ViewA";
+import {ViewB} from "./entity/ViewB";
+import {ViewC} from "./entity/ViewC";
+
+describe("github issues > #7586 Oddly indexed views are not dropped in migration", () => {
+    let connections: Connection[];
+    before(async () => connections = await createTestingConnections({
+        enabledDrivers: ["postgres"],
+        schemaCreate: true,
+        dropSchema: true,
+        entities: [TestEntity, ViewA, ViewB, ViewC],
+    }));
+    after(() => closeTestingConnections(connections));
+
+    it("should generate drop queries for all views", () => Promise.all(connections.map(async connection => {
+        const expectedDrops: RegExp[] = [];
+        for(const view of [ViewA, ViewB, ViewC]){
+            const metadata = connection.getMetadata(view);
+            metadata.expression = (metadata.expression as string)?.replace('V1', 'V2')
+            expectedDrops.push(new RegExp(`^DROP\\s+VIEW.*"${metadata.tableName}"`))
+        }
+        const sqlInMemory = await connection.driver.createSchemaBuilder().log();
+        sqlInMemory.downQueries.filter(q => expectedDrops.find(expected => q.query.match(expected))).length.should.be.equal(expectedDrops.length);
+        sqlInMemory.upQueries.filter(q => expectedDrops.find(expected => q.query.match(expected))).length.should.be.equal(expectedDrops.length);
+    })));
+});