Kotlin Spring Boot Webflux 使用 @Valid 注解验证 @RequestBody

Question

我在带有 Webflux 的 Spring Boot 中有一个简单的 REST API。 我想在我的 POST 请求中对请求正文使用基于注释的简单验证。

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)

}

期望：当我提供带有空字符串作为标题和/或超过 10 个字符的描述的 POST 请求时，我不应该得到 201 CREATED 作为响应。

Checking with Postman

如您所见，我收到 201 CREATED 作为响应。

有人看到我哪里出错了吗？？？

Answer 1

您需要在控制器中进行一些更改（@Valid 位置）：

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

还有在模型本身中（你需要使用@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?,
)