Webflux-ui - JsonMappingException: Null key for a Map not allowed in JSON #1266
Comments
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Make sure you Provide a Minimal, Reproducible Example - with HelloController that reproduces the problem. This ticket can be reopened, if the relevant information are provided. |
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I am hitting a similar issue with Boot Works <dependency>
<groupId>org.springdoc</groupId>
<artifactId>springdoc-openapi-ui</artifactId>
<version>1.5.7</version>
</dependency>Breaks <dependency>
<groupId>org.springdoc</groupId>
<artifactId>springdoc-openapi-ui</artifactId>
<version>1.5.8</version>
</dependency>In my case, I am providing Json Type Information to my response. This annotation is causing the issue:
I will try to provide a reproducible example. Should I possibly file a separate issue as mine is not related to Webflux? |
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same problem: Null key for a Map not allowed in JSON (use a converting NullKeySerializer?) (through reference chain: io.swagger.v3.oas.models.OpenAPI["paths"]->io.swagger.v3.oas.models.Paths["/v2/reprocess-loading/{realm}/PricelistSource/{id}"]->io.swagger.v3.oas.models.PathItem["get"]->io.swagger.v3.oas.models.Operation["responses"]->io.swagger.v3.oas.models.responses.ApiResponses["200"]->io.swagger.v3.oas.models.responses.ApiResponse["content"]->io.swagger.v3.oas.models.media.Content["application/json"]->io.swagger.v3.oas.models.media.MediaType["schema"]->io.swagger.v3.oas.models.media.ObjectSchema["properties"]->java.util.LinkedHashMap["null"]) |
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Are you able to provide a Minimal, Reproducible Example - with HelloController that reproduces the problem? |
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Hey @bnasslahsen,
What I can add, though: the issue was most likely introduced in 1.5.8. At least that is the first version I can reproduce it with. With 1.5.7 and below no exception is thrown. It is also still reproducible in 1.6.2. I could try to provide a minimal, reproducible example, but I'm not exactly sure what you need. You refer to HelloController, is that something special a user of springdoc should know? :) |
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First follow Contribution Guide. |
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Describe the bug How to reproduce
Expected behavior
Actual behavior The result will be a 500 response: In the swagger ui we will see an error: In the spring logs we will see the exception thrown: Additional context
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@bnasslahsen Thanks for clarifying and of course for your work on springdoc :). I've prepared a reproducible demo and additionally tried to summarize all infos about the issue in the same comment. Do you think that is sufficient to re-open the bug? |
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This is a bug in the swagger-core and occuring when JsonTypeInfo.As.WRAPPER_OBJECT is identified by name. Here the sample code to confirm it, with only swagger-core classes: val resolvedSchema = ModelConverters.getInstance()
.readAllAsResolvedSchema(
AnnotatedType(HelloResponse::class.java)
.resolveAsRef(true)
)
Assert.isTrue(resolvedSchema.schema.properties.keys.size==1, "Should contain one element HelloResponse");
Assert.notNull(
resolvedSchema.schema.properties.keys.stream().findFirst().isPresent,
"I'd like it to be present!"
)
There is a similar issue for You can add your comments with detailed description to these tickets, so the This is the code line causing the issue:
As workaround, use @JsonTypeInfo(include = JsonTypeInfo.As.WRAPPER_OBJECT, use = JsonTypeInfo.Id.CLASS) |
This is to fix the issue mentioned here springdoc/springdoc-openapi#1266
This is to fix the issue mentioned here springdoc/springdoc-openapi#1266
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swagger-core:2.2.1 it is solved |
After upgrading from version 1.5.5 to 1.5.10 the following exception appears when entering swagger UI(/swagger-ui.html):
logs
Spring Boot version: 2.5.4
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