From e7fdf037c4b132afca958ee3425ce9f3c31df4a2 Mon Sep 17 00:00:00 2001
From: ChipGPT <chip@ignission.io>
Date: Thu, 17 Jul 2025 10:52:59 -0500
Subject: [PATCH 1/3] Add model association override

---
 packages/adapter-sequelize/src/index.ts | 28 ++++++++++++++++++++++---
 1 file changed, 25 insertions(+), 3 deletions(-)

diff --git a/packages/adapter-sequelize/src/index.ts b/packages/adapter-sequelize/src/index.ts
index 7499085809..b9e69b9658 100644
--- a/packages/adapter-sequelize/src/index.ts
+++ b/packages/adapter-sequelize/src/index.ts
@@ -56,13 +56,31 @@ export interface SequelizeAdapterOptions {
     Session: ModelCtor<SessionInstance>
     VerificationToken: ModelCtor<VerificationTokenInstance>
   }>
+  /**
+   * Override the default model {@link https://sequelize.org/docs/v6/core-concepts/assocs/ associations}
+   *
+   * Default Associations:
+   * ```ts
+   * Account.belongsTo(User, { onDelete: "cascade" })
+   * Session.belongsTo(User, { onDelete: "cascade" })
+   * ```
+   *
+   * Example:
+   * ```ts
+   * (User, Account, Session) => {
+   *   Account.belongsTo(User, { onDelete: "cascade", foreignKey: "userId", as: 'user' });
+   *   Session.belongsTo(User, { onDelete: "cascade", foreignKey: "userId", as: 'user' });
+   * }
+   * ```
+   */
+  associations?: async (User: UserInstance, Account: AccountInstance, Session: SessionInstance, VerificationToken: VerificationTokenInstance) => void
 }
 
 export default function SequelizeAdapter(
   client: Sequelize,
   options?: SequelizeAdapterOptions
 ): Adapter {
-  const { models, synchronize = true } = options ?? {}
+  const { models, synchronize = true, associations } = options ?? {}
   const defaultModelOptions = { underscored: true, timestamps: false }
   const { User, Account, Session, VerificationToken } = {
     User:
@@ -111,8 +129,12 @@ export default function SequelizeAdapter(
     }
   }
 
-  Account.belongsTo(User, { onDelete: "cascade" })
-  Session.belongsTo(User, { onDelete: "cascade" })
+  if (associations) {
+    await associations();
+  } else {
+    Account.belongsTo(User, { onDelete: "cascade" })
+    Session.belongsTo(User, { onDelete: "cascade" })
+  }
 
   return {
     async createUser(user) {

From 11f3438ce626a0bf132ed9d39768eaa9fc3974da Mon Sep 17 00:00:00 2001
From: ChipGPT <chip@ignission.io>
Date: Thu, 17 Jul 2025 12:38:17 -0500
Subject: [PATCH 2/3] Should not be async

---
 packages/adapter-sequelize/src/index.ts | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/packages/adapter-sequelize/src/index.ts b/packages/adapter-sequelize/src/index.ts
index b9e69b9658..dbd2258216 100644
--- a/packages/adapter-sequelize/src/index.ts
+++ b/packages/adapter-sequelize/src/index.ts
@@ -55,7 +55,7 @@ export interface SequelizeAdapterOptions {
     Account: ModelCtor<AccountInstance>
     Session: ModelCtor<SessionInstance>
     VerificationToken: ModelCtor<VerificationTokenInstance>
-  }>
+  }>,
   /**
    * Override the default model {@link https://sequelize.org/docs/v6/core-concepts/assocs/ associations}
    *
@@ -73,7 +73,7 @@ export interface SequelizeAdapterOptions {
    * }
    * ```
    */
-  associations?: async (User: UserInstance, Account: AccountInstance, Session: SessionInstance, VerificationToken: VerificationTokenInstance) => void
+  associations?: (User: UserInstance, Account: AccountInstance, Session: SessionInstance, VerificationToken: VerificationTokenInstance) => void
 }
 
 export default function SequelizeAdapter(
@@ -130,7 +130,7 @@ export default function SequelizeAdapter(
   }
 
   if (associations) {
-    await associations();
+    associations();
   } else {
     Account.belongsTo(User, { onDelete: "cascade" })
     Session.belongsTo(User, { onDelete: "cascade" })

From 935df4f9c924e76937adf00802cc33d96130e005 Mon Sep 17 00:00:00 2001
From: ChipGPT <chip@ignission.io>
Date: Thu, 17 Jul 2025 12:44:32 -0500
Subject: [PATCH 3/3] Fix associations call

---
 packages/adapter-sequelize/src/index.ts | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/packages/adapter-sequelize/src/index.ts b/packages/adapter-sequelize/src/index.ts
index dbd2258216..9778469444 100644
--- a/packages/adapter-sequelize/src/index.ts
+++ b/packages/adapter-sequelize/src/index.ts
@@ -55,7 +55,7 @@ export interface SequelizeAdapterOptions {
     Account: ModelCtor<AccountInstance>
     Session: ModelCtor<SessionInstance>
     VerificationToken: ModelCtor<VerificationTokenInstance>
-  }>,
+  }>;
   /**
    * Override the default model {@link https://sequelize.org/docs/v6/core-concepts/assocs/ associations}
    *
@@ -73,7 +73,12 @@ export interface SequelizeAdapterOptions {
    * }
    * ```
    */
-  associations?: (User: UserInstance, Account: AccountInstance, Session: SessionInstance, VerificationToken: VerificationTokenInstance) => void
+  associations?: (
+    User: ModelCtor<UserInstance>,
+    Account: ModelCtor<AccountInstance>,
+    Session: ModelCtor<SessionInstance>,
+    VerificationToken: ModelCtor<VerificationTokenInstance>
+  ) => void;
 }
 
 export default function SequelizeAdapter(
@@ -130,10 +135,10 @@ export default function SequelizeAdapter(
   }
 
   if (associations) {
-    associations();
+    associations(User, Account, Session, VerificationToken);
   } else {
-    Account.belongsTo(User, { onDelete: "cascade" })
-    Session.belongsTo(User, { onDelete: "cascade" })
+    Account.belongsTo(User, { onDelete: 'cascade' });
+    Session.belongsTo(User, { onDelete: 'cascade' });
   }
 
   return {