chore: complete the discount service and test the logic to create

src/modules/discounts/entities/discount.entity.ts

@@ -3,6 +3,8 @@ import { Column, DeleteDateColumn, Entity, OneToMany } from "typeorm";
 import { UsageDiscount } from "./usage-discount.entity";
 import { BaseEntity } from "../../../common/entities/base.entity";
 import { DecimalTransformer } from "../../../common/transformers/decimal.transformer";
+import { SubscriptionPlan } from "../../subscriptions/entities/subscription.entity";
+import { DiscountApplicationType } from "../enums/discount-application-type.enum";
 import { DiscountType } from "../enums/discount-type.enum";
 
 @Entity()
@@ -10,8 +12,11 @@ export class Discount extends BaseEntity {
   @Column({ type: "varchar", length: 150 })
   title: string;
 
-  @Column({ type: "varchar", length: 100, unique: true })
-  code: string;
+  @Column({ type: "enum", enum: DiscountApplicationType })
+  applicationType: DiscountApplicationType;
+
+  @Column({ type: "varchar", length: 100, unique: true, nullable: true })
+  code?: string;
 
   @Column({ type: "enum", enum: DiscountType, default: DiscountType.PERCENTAGE })
   type: DiscountType;
@@ -31,9 +36,13 @@ export class Discount extends BaseEntity {
   @Column({ type: "boolean", default: true })
   isActive: boolean;
 
+  @DeleteDateColumn({ nullable: true })
+  deletedAt?: Date;
+
+  // Relations
   @OneToMany(() => UsageDiscount, (usageDiscount) => usageDiscount.discount)
   usages: UsageDiscount[];
 
-  @DeleteDateColumn({ nullable: true })
-  deletedAt?: Date;
+  @OneToMany(() => SubscriptionPlan, (subscriptionPlan) => subscriptionPlan.directDiscount)
+  subscriptionPlans: SubscriptionPlan[];
 }