OPENAPI/Swagger 代码生成 AdditionnalProperties 扩展了 HashMap:play(jackson) 反序列化失败。

use*_*649 5 playback jackson codegen swagger

我的问题有点复杂,我会尽量解释清楚。为此,我做了一个简单的项目。

我正在使用Swagger 代码生成器从 swagger 文件生成 Java 类。在 swagger 文件中,定义使用了 additionalnalProperties。

  MyRequestBody:
    type: object
    properties:
      property1:
        type: string
      property2:
        type: string
    additionalProperties:
      type: object
Run Code Online (Sandbox Code Playgroud)

生成的java类:

/*
 * Chatbot api
 * Api for chatbot interface.
 *
 * OpenAPI spec version: 1.0
 * 
 *
 * NOTE: This class is auto generated by the swagger code generator program.
 * https://github.com/swagger-api/swagger-codegen.git
 * Do not edit the class manually.
 */


package lu.post.models.api.test;

import java.util.Objects;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.fasterxml.jackson.annotation.JsonCreator;
import io.swagger.annotations.ApiModel;
import io.swagger.annotations.ApiModelProperty;
import java.util.HashMap;
import java.util.Map;
import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
import com.fasterxml.jackson.databind.annotation.JsonSerialize;
import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
import com.fasterxml.jackson.annotation.JsonInclude;
import javax.xml.bind.annotation.*;
/**
 * MyRequestBody
 */
@javax.annotation.Generated(value = "lu.post.codegen.ApiplaylibGenerator")
@JsonIgnoreProperties(ignoreUnknown = true)
@JsonInclude(JsonInclude.Include.NON_NULL)
@XmlRootElement(name="MyRequestBody")
@XmlAccessorType(XmlAccessType.FIELD)
public class MyRequestBody extends HashMap<String, Object> {
  @JsonProperty("property1")
        @XmlElement(name="property1")
  private String property1 = null;

  @JsonProperty("property2")
        @XmlElement(name="property2")
  private String property2 = null;

  public MyRequestBody property1(String property1) {
    this.property1 = property1;
    return this;
  }

   /**
   * Get property1
   * @return property1
  **/
  @ApiModelProperty(example = "null", value = "")
  public String getProperty1() {
    return property1;
  }

  public void setProperty1(String property1) {
    this.property1 = property1;
  }

  public MyRequestBody property2(String property2) {
    this.property2 = property2;
    return this;
  }

   /**
   * Get property2
   * @return property2
  **/
  @ApiModelProperty(example = "null", value = "")
  public String getProperty2() {
    return property2;
  }

  public void setProperty2(String property2) {
    this.property2 = property2;
  }


  @Override
  public boolean equals(java.lang.Object o) {
    if (this == o) {
      return true;
    }
    if (o == null || !(o instanceof MyRequestBody)) {
      return false;
    }
    MyRequestBody myRequestBody = (MyRequestBody) o;
    return Objects.equals(this.property1, myRequestBody.property1) &&
        Objects.equals(this.property2, myRequestBody.property2) &&
        super.equals(o);
  }

  @Override
  public int hashCode() {
    return Objects.hash(property1, property2, super.hashCode());
  }


  @Override
  public String toString() {
    StringBuilder sb = new StringBuilder();
    sb.append("class MyRequestBody {\n");
    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
    sb.append("    property1: ").append(toIndentedString(property1)).append("\n");
    sb.append("    property2: ").append(toIndentedString(property2)).append("\n");
    sb.append("}");
    return sb.toString();
  }

  /**
   * Convert the given object to string with each line indented by 4 spaces
   * (except the first line).
   */
  private String toIndentedString(java.lang.Object o) {
    if (o == null) {
      return "null";
    }
    return o.toString().replace("\n", "\n    ");
  }

}
Run Code Online (Sandbox Code Playgroud)

如您所见,生成的类扩展了 HashMap 的附加属性。

在这个阶段,没有什么令人震惊的。

这个类已经用在一个play/java项目中,使用play库对json和pojo进行序列化/反序列化。

我创建了一个简单的路由和控制器来使用以下主体(与 swagger 定义匹配)执行 POST /test

{
    "property1": "p1", 
    "property2": "p2"
}
Run Code Online (Sandbox Code Playgroud)

我的控制器看起来像:

public Result test() {
    classLogger.debug("==================================");
    classLogger.debug("START test()");
    JsonNode bodyJsonNode = request().body().asJson();
    MyRequestBody myRequestBody = Json.fromJson(bodyJsonNode, MyRequestBody.class);

    classLogger.debug("myRequestBody : ");
    classLogger.debug(myRequestBody.toString());

    classLogger.debug("END test()");
    classLogger.debug("==================================");
    return ok();
}
Run Code Online (Sandbox Code Playgroud)

日志显示了问题:

2017-12-16 22:54:15,556[DEBUG][][][][ConversationController]==================================
2017-12-16 22:54:15,556[DEBUG][][][][ConversationController]START test()
2017-12-16 22:54:15,605[DEBUG][][][][ConversationController]myRequestBody :
2017-12-16 22:54:15,605[DEBUG][][][][ConversationController]class MyRequestBody {
    {property2=p2, property1=p1}
    property1: null
    property2: null
}
2017-12-16 22:54:15,605[DEBUG][][][][ConversationController]END test()
2017-12-16 22:54:15,605[DEBUG][][][][ConversationController]==================================
Run Code Online (Sandbox Code Playgroud)

对象字段“property1”和“property2”为空,因为字段名和值都放在Map键/值中。

有没有人知道解决这个问题的最佳方法,知道: - 我不能修改 swagger 定义(因为在我的真实项目中,它是由另一个社会提供的)。- 我希望继续使用 swagger 代码生成库。

提前致谢,

Tom*_*mon 0

我面临着另一个似乎与你的问题相关的问题。我已经设法在 API 定义中将属性和映射分开,它可能会帮助您,但生成的代码是错误的,因为尽管使用了 HashMap.java,但它仍然缺少 HashMap.java 的导入。

模式:

ReportRequest:
  type: object
  properties:
    authentication:
      $ref: '#/components/schemas/SessionAuthentication'
    reportParameters:
      $ref: '#/components/schemas/ReportParameters'
ReportParameters:
  type: object
  properties:
    fromDate:
      type: string
    toDate:
      type: string
  required:
    - fromDate
    - toDate
  additionalProperties: true
  example:  
    fromDate: '2020-04-13'
    toDate: '2022-04-13'
Run Code Online (Sandbox Code Playgroud)

请注意,缺少 java.util.HashMap 导入和键入错误。

类型不匹配:无法从 HashMap<String,Object> 转换为 ReportParameters

    package io.swagger.model;

import java.util.Objects;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.fasterxml.jackson.annotation.JsonCreator;
import io.swagger.model.ReportParameters;
import io.swagger.model.SessionAuthentication;
import io.swagger.v3.oas.annotations.media.Schema;
import org.springframework.validation.annotation.Validated;
import javax.validation.Valid;
import javax.validation.constraints.*;

/**
 * ReportRequest
 */
@Validated
@javax.annotation.Generated(value = "io.swagger.codegen.v3.generators.java.SpringCodegen", date = "2022-03-31T11:12:13.135Z[GMT]")

public class ReportRequest   {
          @JsonProperty("authentication")
          private SessionAuthentication authentication = null;
        
          @JsonProperty("reportParameters")
          private ReportParameters reportParameters = new HashMap<String, Object>();
Run Code Online (Sandbox Code Playgroud)

有关 assionalProperties 的更多信息,请访问