article detail page

db error fixed

backend/src/modules/entities.ts

@@ -6,8 +6,22 @@ import {
   UpdateDateColumn,
   ManyToOne,
   JoinColumn,
+  ValueTransformer,
 } from 'typeorm';
 
+class ArrayTransformer implements ValueTransformer {
+  to(value: string[]): string {
+    return JSON.stringify(value ?? []);
+  }
+  from(value: string): string[] {
+    try {
+      return value ? JSON.parse(value) : [];
+    } catch {
+      return [];
+    }
+  }
+}
+
 export enum ArticleStatus {
   DRAFT = 'draft',
   PUBLISHED = 'published',
@@ -92,7 +106,11 @@ export class Article {
   @Column({ default: '' })
   featuredImage: string;
 
-  @Column({ type: 'text', default: '[]' })
+  @Column({
+    type: 'text',
+    default: '[]',
+    transformer: new ArrayTransformer(),
+  })
   tags: string[];
 
   @Column({