fix(topic): add vaildation

src/modules/topic/topic.model.ts

@@ -1,4 +1,11 @@
-import { IsOptional, IsString, MaxLength } from 'class-validator'
+import {
+  IsNotEmpty,
+  IsOptional,
+  IsString,
+  IsUrl,
+  MaxLength,
+} from 'class-validator'
+import slugify from 'slugify'
 
 import { index, modelOptions, prop } from '@typegoose/typegoose'
 
@@ -14,16 +21,42 @@ export class TopicModel extends BaseModel {
   @prop({ default: '' })
   @MaxLength(400, { message: '描述信息最多 400 个字符' })
   @IsOptional()
-  @IsString({ message: '描述信息必须是字符串' })
+  @IsString()
   description?: string
 
   @prop()
-  @IsString({ message: '简介必须是字符串' })
+  @IsString()
   introduce: string
 
   @prop({ unique: true })
+  @IsString()
+  @IsNotEmpty({
+    message: '话题名称不能为空',
+  })
+  @MaxLength(50)
   name: string
 
-  @prop({ unique: true })
-  id: string
+  @prop({
+    unique: true,
+    set(val) {
+      return slugify(val)
+    },
+  })
+  @IsString({
+    message: '路径必须是字符串',
+  })
+  @IsNotEmpty()
+  slug: string
+
+  @IsUrl(
+    {
+      require_protocol: true,
+    },
+    {
+      message: '请输入正确的 URL',
+    },
+  )
+  @prop()
+  @IsOptional()
+  icon?: string
 }