diff --git a/src/models/User.ts b/src/models/User.ts
index fce74e8..b039d20 100644
--- a/src/models/User.ts
+++ b/src/models/User.ts
@@ -2,6 +2,7 @@ import { Entity, Column, OneToMany, ManyToOne, PrimaryGeneratedColumn, Generated
 import { IsBoolean, IsEmail, IsInt, IsNotEmpty, IsOptional, IsString, isUUID, } from "class-validator";
 import { UserGroup } from './UserGroup';
 import { Permission } from './Permission';
+import { UserAction } from './UserAction';
 
 /**
  * Defines a admin user.
@@ -11,10 +12,10 @@ export class User {
   /**
      * autogenerated unique id (primary key).
      */
-    @PrimaryGeneratedColumn()
-    @IsOptional()
-    @IsInt()
-    id: number;
+  @PrimaryGeneratedColumn()
+  @IsOptional()
+  @IsInt()
+  id: number;
 
   /**
      * autogenerated uuid
@@ -96,6 +97,12 @@ export class User {
   @IsString()
   profilepic: string;
 
+  /**
+   * actions
+   */
+  @OneToMany(() => UserAction, action => action.user)
+  actions: UserAction
+
   /**
    * calculate all permissions
    */
diff --git a/src/models/UserAction.ts b/src/models/UserAction.ts
index ea794a5..c9caf60 100644
--- a/src/models/UserAction.ts
+++ b/src/models/UserAction.ts
@@ -1,10 +1,11 @@
-import { PrimaryGeneratedColumn, Column, OneToMany, Entity } from "typeorm";
+import { PrimaryGeneratedColumn, Column, OneToMany, Entity, ManyToOne } from "typeorm";
 import {
   IsInt,
   IsNotEmpty,
   IsOptional,
   IsString,
 } from "class-validator";
+import { User } from './User';
 
 /**
  * Defines the UserAction interface.
@@ -19,8 +20,11 @@ export class UserAction {
   @IsInt()
   id: number;
 
-  // TODO:
-  // user: relation
+  /**
+   * user
+   */
+  @ManyToOne(() => User, user => user.actions)
+  user: User
 
   /**
    * The actions's target (e.g. Track#2)
@@ -41,7 +45,7 @@ export class UserAction {
   /**
    * The description of change (before-> after; e.g. distance:15->17)
    */
-  @Column({nullable: true})
+  @Column({ nullable: true })
   @IsOptional()
   @IsString()
   changed: string;