fix: apply relationship constraints when using sub query in whereIn condition

src/database/query_builder/chainable.ts

@@ -231,8 +231,7 @@ export abstract class Chainable extends Macroable implements ChainableContract {
    */
   protected transformValue(value: any) {
     if (value instanceof Chainable) {
-      value.applyWhere()
-      return value.knexQuery
+      return value.toKnex()
     }
 
     if (value instanceof ReferenceBuilder) {
@@ -2074,4 +2073,12 @@ export abstract class Chainable extends Macroable implements ChainableContract {
 
     return this
   }
+
+  /**
+   * Applies statements and returns knex query
+   */
+  toKnex() {
+    this.applyWhere()
+    return this.knexQuery
+  }
 }

src/orm/relations/base/query_builder.ts

@@ -165,6 +165,14 @@ export abstract class BaseQueryBuilder
     return this
   }
 
+  /**
+   * Return knex query
+   */
+  toKnex() {
+    this.applyConstraints()
+    return super.toKnex()
+  }
+
   /**
    * Get query sql
    */

test/orm/model_query_builder.spec.ts

@@ -10,7 +10,7 @@
 import { test } from '@japa/runner'
 import { AppFactory } from '@adonisjs/core/factories/app'
 
-import { column } from '../../src/orm/decorators/index.js'
+import { column, hasMany } from '../../src/orm/decorators/index.js'
 import { scope } from '../../src/orm/base_model/index.js'
 import { ModelQueryBuilder } from '../../src/orm/query_builder/index.js'
 import {
@@ -21,6 +21,7 @@ import {
   resetTables,
   getBaseModel,
 } from '../../test-helpers/index.js'
+import { HasMany } from '../../src/types/relations.js'
 
 test.group('Model query builder', (group) => {
   group.setup(async () => {
@@ -443,4 +444,51 @@ test.group('Model query builder', (group) => {
     const users = await User.query().count('* as total')
     assert.equal(Number(users[0].$extras.total), 2)
   })
+
+  test('apply relationship constraints when using sub query', async ({ fs, assert }) => {
+    const app = new AppFactory().create(fs.baseUrl, () => {})
+    await app.init()
+    const db = getDb()
+    const adapter = ormAdapter(db)
+    const BaseModel = getBaseModel(adapter)
+
+    class Post extends BaseModel {
+      @column()
+      declare userId: number | null
+
+      @column()
+      declare title: string
+    }
+
+    class User extends BaseModel {
+      @column({ isPrimary: true })
+      declare id: number
+
+      @column()
+      declare username: string
+
+      @hasMany(() => Post)
+      declare posts: HasMany<typeof Post>
+    }
+
+    Post.boot()
+    User.boot()
+
+    const users = await User.createMany([
+      {
+        username: 'virk',
+      },
+      {
+        username: 'nikk',
+      },
+    ])
+
+    for (let user of users) {
+      await user.related('posts').create({ title: 'Test' })
+    }
+
+    const posts = await Post.query().whereIn('id', users[0].related('posts').query().select('id'))
+
+    assert.lengthOf(posts, 1)
+  })
 })