Update created_at and updated_at columns

src/entity/category.entity.ts

@@ -1,22 +1,47 @@
 import {
+    BeforeInsert,
+    BeforeUpdate,
     Column,
     Entity,
     PrimaryGeneratedColumn
 } from "typeorm";
+import {v4 as uuidv4} from 'uuid';
 
 @Entity("category")
 class Category {
     @PrimaryGeneratedColumn('uuid')
-    id!: bigint
+    uuid!: string
+
+    @Column({type: 'timestamp', default:() => 'CURRENT_TIMESTAMP' })
+    created_at: Date | undefined;
+
+    @Column({type: 'timestamp', default:() => 'CURRENT_TIMESTAMP' })
+    updated_at: Date | undefined;
 
     @Column({type: 'varchar', length: 255})
     category: string
 
+
     constructor(
         category: string,
     ) {
         this.category = category;
     }
+
+    @BeforeInsert()
+    @BeforeUpdate()
+    updateTimestamps() {
+        this.updated_at = new Date();
+        if (!this.uuid) {
+            this.created_at = new Date();
+        }
+    }
+    @BeforeInsert()
+    async generateUuid() {
+        if (!this.uuid) {
+            this.uuid = uuidv4();
+        }
+    }
 }
 
 export default Category;

src/entity/email.entity.ts

@@ -1,15 +1,18 @@
 import {
+    BeforeInsert,
+    BeforeUpdate,
     Column,
-    CreateDateColumn,
     Entity,
     PrimaryGeneratedColumn
 } from "typeorm";
 import {EmailStatusTypes} from "../enums/enums";
+import {v4 as uuidv4} from 'uuid';
+
 
 @Entity("email")
 class Email {
     @PrimaryGeneratedColumn('uuid')
-    id!: bigint
+    uuid!: string
 
     @Column({type: 'varchar', length: 255})
     recipient: string
@@ -23,8 +26,11 @@ class Email {
     @Column({type: 'enum', enum: EmailStatusTypes})
     state: EmailStatusTypes
 
-    @CreateDateColumn()
-    created_at: Date | undefined
+    @Column({type: 'timestamp', default:() => 'CURRENT_TIMESTAMP' })
+    created_at: Date | undefined;
+
+    @Column({type: 'timestamp', default:() => 'CURRENT_TIMESTAMP' })
+    updated_at: Date | undefined;
 
     constructor(
         recipient: string,
@@ -37,6 +43,22 @@ class Email {
         this.content = content;
         this.state = state;
     }
+
+    @BeforeInsert()
+    @BeforeUpdate()
+    updateTimestamps() {
+        this.updated_at = new Date();
+        if (!this.uuid) {
+            this.created_at = new Date();
+        }
+    }
+
+    @BeforeInsert()
+    async generateUuid() {
+        if (!this.uuid) {
+            this.uuid = uuidv4();
+        }
+    }
 }
 
 export default Email;

src/entity/mentee.entity.ts

@@ -1,22 +1,23 @@
 import {
+    BeforeInsert,
+    BeforeUpdate,
     Column,
-    CreateDateColumn,
     Entity,
     JoinColumn,
     ManyToOne,
     OneToOne,
-    PrimaryGeneratedColumn,
-    UpdateDateColumn
+    PrimaryGeneratedColumn
 } from "typeorm";
 import {MenteeApplication} from "../types";
 import Mentor from "./mentor.entity";
 import profileEntity from "./profile.entity";
 import {MenteeStateTypes} from "../enums/enums";
+import {v4 as uuidv4} from "uuid";
 
 @Entity('mentee')
 class Mentee {
     @PrimaryGeneratedColumn()
-    id!: bigint
+    uuid!: string
 
     @Column({type:"enum"})
     state: MenteeStateTypes
@@ -37,11 +38,11 @@ class Mentee {
     @ManyToOne(() => Mentor, mentor => mentor.mentees)
     mentor: Mentor
 
-    @CreateDateColumn()
-    created_at: Date | undefined
+    @Column({type: 'timestamp', default:() => 'CURRENT_TIMESTAMP' })
+    created_at: Date | undefined;
 
-    @UpdateDateColumn()
-    updated_at: Date | undefined
+    @Column({type: 'timestamp', default:() => 'CURRENT_TIMESTAMP' })
+    updated_at: Date | undefined;
 
     constructor(
         state: MenteeStateTypes,
@@ -58,6 +59,22 @@ class Mentee {
         this.profile = profile;
         this.mentor = mentor;
     }
+
+    @BeforeInsert()
+    @BeforeUpdate()
+    updateTimestamps() {
+        this.updated_at = new Date();
+        if (!this.uuid) {
+            this.created_at = new Date();
+        }
+    }
+
+    @BeforeInsert()
+    async generateUuid() {
+        if (!this.uuid) {
+            this.uuid = uuidv4();
+        }
+    }
 }
 
 export default Mentee;

src/entity/mentor.entity.ts

@@ -1,21 +1,21 @@
 import {
+    BeforeInsert, BeforeUpdate,
     Column,
-    CreateDateColumn,
     Entity,
     JoinColumn,
     OneToMany,
     OneToOne,
-    PrimaryGeneratedColumn,
-    UpdateDateColumn
+    PrimaryGeneratedColumn
 } from "typeorm";
 import profileEntity from "./profile.entity";
 import Mentee from "./mentee.entity";
 import Category from "./category.entity";
+import {v4 as uuidv4} from "uuid";
 
 @Entity("mentor")
 class Mentor {
     @PrimaryGeneratedColumn('uuid')
-    id!: bigint
+    uuid!: string
 
     @Column({type: 'varchar', length: 255})
     state: string
@@ -36,11 +36,11 @@ class Mentor {
     @OneToMany(() => Mentee, mentee => mentee.mentor)
     mentees: Mentee[];
 
-    @CreateDateColumn()
-    created_at: Date | undefined
+    @Column({type: 'timestamp', default:() => 'CURRENT_TIMESTAMP' })
+    created_at: Date | undefined;
 
-    @UpdateDateColumn()
-    updated_at: Date | undefined
+    @Column({type: 'timestamp', default:() => 'CURRENT_TIMESTAMP' })
+    updated_at: Date | undefined;
 
     constructor(
         state: string,
@@ -57,6 +57,22 @@ class Mentor {
         this.profile = profile;
         this.mentees =mentees;
     }
+
+    @BeforeInsert()
+    @BeforeUpdate()
+    updateTimestamps() {
+        this.updated_at = new Date();
+        if (!this.uuid) {
+            this.created_at = new Date();
+        }
+    }
+
+    @BeforeInsert()
+    async generateUuid() {
+        if (!this.uuid) {
+            this.uuid = uuidv4();
+        }
+    }
 }
 
 export default Mentor;

src/entity/platform.entity.ts

@@ -1,15 +1,17 @@
 import {
+    BeforeInsert, BeforeUpdate,
     Column,
     CreateDateColumn,
     Entity,
     PrimaryGeneratedColumn,
     UpdateDateColumn
 } from "typeorm";
+import {v4 as uuidv4} from "uuid";
 
 @Entity("platform")
 class Platform {
     @PrimaryGeneratedColumn('uuid')
-    id!: bigint
+    uuid!: string
 
     @Column()
     description: string
@@ -29,11 +31,11 @@ class Platform {
     @Column({type: 'varchar', length: 255})
     title: string
 
-    @CreateDateColumn()
-    created_at: Date | undefined
+    @Column({type: 'timestamp', default:() => 'CURRENT_TIMESTAMP' })
+    created_at: Date | undefined;
 
-    @UpdateDateColumn()
-    updated_at: Date | undefined
+    @Column({type: 'timestamp', default:() => 'CURRENT_TIMESTAMP' })
+    updated_at: Date | undefined;
 
     constructor(
         description: string,
@@ -42,7 +44,6 @@ class Platform {
         landing_page_url: string,
         email_templates: JSON,
         title: string,
-        category: string,
     ) {
         this.description = description;
         this.mentor_questions = mentor_questions;
@@ -51,6 +52,22 @@ class Platform {
         this.email_templates = email_templates;
         this.title = title;
     }
+
+    @BeforeInsert()
+    @BeforeUpdate()
+    updateTimestamps() {
+        this.updated_at = new Date();
+        if (!this.uuid) {
+            this.created_at = new Date();
+        }
+    }
+
+    @BeforeInsert()
+    async generateUuid() {
+        if (!this.uuid) {
+            this.uuid = uuidv4();
+        }
+    }
 }
 
 export default Platform;

src/types.ts

@@ -1,6 +1,7 @@
 interface Option {
 // todo: To be determined
 }
+
 interface Question {
     question: string
     answer: string