Kotlin Spring 引导 Webflux 使用 @Valid 注释验证 @RequestBody

Question

我在 Spring Boot with Webflux 中有一个简单的 REST API。我想在我的 POST 请求中对请求 body 使用简单的基于注释的验证。

RecipeModel.kt

package com.example.reactive.models

import org.springframework.data.annotation.Id
import org.springframework.data.relational.core.mapping.Table
import org.springframework.stereotype.Component
import javax.validation.constraints.Max
import javax.validation.constraints.NotBlank

@Table("recipes")
data class Recipe (
    @Id
    val id: Long?,
    @NotBlank(message = "Title is required") 
    val title: String,
    @Max(10, message = "Description is too long") 
    val description: String?,
)

RecipeRepo.kt

package com.example.reactive.repositories

import com.example.reactive.models.Recipe
import org.springframework.data.repository.reactive.ReactiveCrudRepository
import org.springframework.stereotype.Repository

@Repository
interface RecipeRepo : ReactiveCrudRepository<Recipe, Long>

RecipeController.kt

package com.example.reactive.controllers

import com.example.reactive.models.Recipe
import com.example.reactive.models.RecipeMapper
import com.example.reactive.repositories.RecipeRepo
import com.example.reactive.services.RecipeService
import org.springframework.http.HttpStatus
import org.springframework.web.bind.annotation.*
import reactor.core.publisher.Flux
import reactor.core.publisher.Mono
import javax.validation.Valid

@RestController
@RequestMapping("/recipes")
class RecipeController(val recipeService : RecipeService) {

 
    @PostMapping
    @ResponseStatus(HttpStatus.CREATED)
    fun createRecipe(@RequestBody payload: @Valid Recipe): Mono<Recipe> =
        recipeService.createRecipe(payload)


}

RecipeService.kt

package com.example.reactive.services

import com.example.reactive.models.Recipe
import com.example.reactive.models.RecipeMapper
import com.example.reactive.repositories.RecipeRepo
import org.springframework.stereotype.Service
import reactor.core.publisher.Flux
import reactor.core.publisher.Mono

@Service
class RecipeService(val recipeRepo: RecipeRepo, val recipeMapper: RecipeMapper) {


    fun createRecipe(recipe: Recipe): Mono<Recipe> = recipeRepo.save(recipe)

}

预期：当我提供一个 POST 请求，其中包含一个空字符串作为标题 and/or 一个超过 10 个字符的描述时，我不应该得到一个 201 CREATED 作为响应。

Checking with Postman

如您所见，我收到了 201 CREATED 作为响应。

有没有人看到我哪里弄错了？？？

Answer 1

您需要对控制器进行一些更改（@Valid 放置）：

@RestController
@RequestMapping("/recipes")
class RecipeController(val recipeService : RecipeService) {
 
    @PostMapping
    @ResponseStatus(HttpStatus.CREATED)
    fun createRecipe(@RequestBody @Valid payload: Recipe): Mono<Recipe> =
        recipeService.createRecipe(payload)
}

还有模型本身（您需要使用 @field:）：

@Table("recipes")
data class Recipe (
    @field:Id
    val id: Long?,
    @field:NotBlank(message = "Title is required") 
    val title: String,
    @field:Max(10, message = "Description is too long") 
    val description: String?,
)

Kotlin Spring 引导 Webflux 使用 @Valid 注释验证 @RequestBody

Kotlin Spring Boot Webflux validate @RequestBody with @Valid annotation

rest

kotlin

spring-boot

spring-webflux